{ "id": "/tehran/festivals/1978", "place": { "id": "112931", "slug": "tehran", "name": "Tehran", "region": "Iran", "country": "IR", "lat": 35.69439, "lon": 51.42151, "elevation_m": 1178, "tz": "Asia/Tehran" }, "year": 1978, "tradition": "smarta", "method": "pac-rp@2026.1", "ruleset": "2026.3-draft", "rulings": [ { "id": "/tehran/festivals/1978/ekadashi?on=1978-01-05", "festival": "ekadashi", "name": "Saphalā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24963, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-01-05T00:48:54+04:00", "utc": "1978-01-04T20:48:54Z", "ms": 252794933722.99567 }, "end": { "local": "1978-01-05T22:15:40+04:00", "utc": "1978-01-05T18:15:40Z", "ms": 252872139706.22858 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-01-05T00:48:54+04:00", "utc": "1978-01-04T20:48:54Z", "ms": 252794933722.99567 }, "end": { "local": "1978-01-05T22:15:40+04:00", "utc": "1978-01-05T18:15:40Z", "ms": 252872139706.22858 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-01-05", "window": { "start": { "local": "1978-01-05T07:44:56+04:00", "utc": "1978-01-05T03:44:56Z", "ms": 252819896455.23343 }, "end": { "local": "1978-01-05T07:44:56+04:00", "utc": "1978-01-05T03:44:56Z", "ms": 252819896455.23343 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-01-06", "window": { "start": { "local": "1978-01-06T07:45:00+04:00", "utc": "1978-01-06T03:45:00Z", "ms": 252906299597.61902 }, "end": { "local": "1978-01-06T07:45:00+04:00", "utc": "1978-01-06T03:45:00Z", "ms": 252906299597.61902 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 00:49 on Thu 5 Jan to 22:16 on Thu 5 Jan.", "fact": "1978-01-04T20:48:54Z → 1978-01-05T18:15:40Z" }, { "step": "kaala", "text": "Sunrise is at 07:45 on the 5th and 07:45 on the 6th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 5th and is not on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 24963 s" }, { "step": "ruling", "text": "Saphalā Ekādaśī, Tehran, 1978: Thursday 5 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-05", "confidence": "determinate" } ], "quote": "In Tehran, Saphalā Ekādaśī 1978 falls on Thursday 5 January. Ekādaśī runs from 00:49 on Thu 5 Jan to 22:16 on Thu 5 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-01-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-01-06", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1200, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-01-06T19:08:33+04:00", "utc": "1978-01-06T15:08:33Z", "ms": 252947312841.31305 }, "end": { "local": "1978-01-07T15:36:24+04:00", "utc": "1978-01-07T11:36:24Z", "ms": 253020984479.13116 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-01-06T19:08:33+04:00", "utc": "1978-01-06T15:08:33Z", "ms": 252947312841.31305 }, "end": { "local": "1978-01-07T15:36:24+04:00", "utc": "1978-01-07T11:36:24Z", "ms": 253020984479.13116 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-01-06", "window": { "start": { "local": "1978-01-06T17:35:15+04:00", "utc": "1978-01-06T13:35:15Z", "ms": 252941714671.62085 }, "end": { "local": "1978-01-06T19:28:33+04:00", "utc": "1978-01-06T15:28:33Z", "ms": 252948512822.90106 } }, "covered_min": 20, "window_min": 113, "qualifies": true }, { "local_date": "1978-01-07", "window": { "start": { "local": "1978-01-07T17:36:07+04:00", "utc": "1978-01-07T13:36:07Z", "ms": 253028166706.6947 }, "end": { "local": "1978-01-07T19:29:18+04:00", "utc": "1978-01-07T15:29:18Z", "ms": 253034957822.11923 } }, "covered_min": 0, "window_min": 113, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:09 on Fri 6 Jan to 15:36 on Sat 7 Jan.", "fact": "1978-01-06T15:08:33Z → 1978-01-07T11:36:24Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:35–19:29 on the 6th, 17:36–19:29 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 20 of 113 minutes on the 6th and 0 of 113 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1200 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Friday 6 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-06", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Friday 6 January. Trayodaśī runs from 19:09 on Fri 6 Jan to 15:36 on Sat 7 Jan and covers 20 of 113 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-01-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-01-07", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31209, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-01-07T15:36:24+04:00", "utc": "1978-01-07T11:36:24Z", "ms": 253020984479.13116 }, "end": { "local": "1978-01-08T11:49:40+04:00", "utc": "1978-01-08T07:49:40Z", "ms": 253093779849.8403 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-01-07T15:36:24+04:00", "utc": "1978-01-07T11:36:24Z", "ms": 253020984479.13116 }, "end": { "local": "1978-01-08T11:49:40+04:00", "utc": "1978-01-08T07:49:40Z", "ms": 253093779849.8403 } }, "kaala": "nishita", "days": [ { "local_date": "1978-01-07", "window": { "start": { "local": "1978-01-08T00:16:33+04:00", "utc": "1978-01-07T20:16:33Z", "ms": 253052193389.53668 }, "end": { "local": "1978-01-08T01:04:33+04:00", "utc": "1978-01-07T21:04:33Z", "ms": 253055073389.53668 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-01-08", "window": { "start": { "local": "1978-01-09T00:16:59+04:00", "utc": "1978-01-08T20:16:59Z", "ms": 253138618556.1543 }, "end": { "local": "1978-01-09T01:04:59+04:00", "utc": "1978-01-08T21:04:59Z", "ms": 253141498556.1543 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 15:36 on Sat 7 Jan to 11:50 on Sun 8 Jan.", "fact": "1978-01-07T11:36:24Z → 1978-01-08T07:49:40Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:17–01:05 on the 7th, 00:17–01:05 on the 8th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 7th and 0 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 31209 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Saturday 7 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-07", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Saturday 7 January. Caturdaśī runs from 15:36 on Sat 7 Jan to 11:50 on Sun 8 Jan and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-01-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-01-12", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24719, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-01-11T22:07:29+04:00", "utc": "1978-01-11T18:07:29Z", "ms": 253390049293.98962 }, "end": { "local": "1978-01-12T19:58:38+04:00", "utc": "1978-01-12T15:58:38Z", "ms": 253468717652.09335 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-01-11T22:07:29+04:00", "utc": "1978-01-11T18:07:29Z", "ms": 253390049293.98962 }, "end": { "local": "1978-01-12T19:58:38+04:00", "utc": "1978-01-12T15:58:38Z", "ms": 253468717652.09335 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-01-11", "window": { "start": { "local": "1978-01-11T12:18:15+04:00", "utc": "1978-01-11T08:18:15Z", "ms": 253354695124.6356 }, "end": { "local": "1978-01-11T13:06:15+04:00", "utc": "1978-01-11T09:06:15Z", "ms": 253357575124.6356 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-01-12", "window": { "start": { "local": "1978-01-12T12:18:39+04:00", "utc": "1978-01-12T08:18:39Z", "ms": 253441119032.91092 }, "end": { "local": "1978-01-12T13:06:39+04:00", "utc": "1978-01-12T09:06:39Z", "ms": 253443999032.91092 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:07 on Wed 11 Jan to 19:59 on Thu 12 Jan.", "fact": "1978-01-11T18:07:29Z → 1978-01-12T15:58:38Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:18–13:06 on the 11th, 12:19–13:07 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 11th and 48 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 24719 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Thursday 12 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-12", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Thursday 12 January. Caturthī runs from 22:07 on Wed 11 Jan to 19:59 on Thu 12 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-01-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/bhogi", "festival": "bhogi", "name": "Bhogi", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 41945, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-02-12T19:05:40+04:00", "utc": "1978-02-12T15:05:40Z", "ms": 256143939667.8633 } }, "span": { "of": "transit", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 } }, "kaala": "sunset-day", "days": [ { "local_date": "1978-01-14", "window": { "start": { "local": "1978-01-13T17:41:38+04:00", "utc": "1978-01-13T13:41:38Z", "ms": 253546897591.28595 }, "end": { "local": "1978-01-14T17:42:35+04:00", "utc": "1978-01-14T13:42:35Z", "ms": 253633355344.34116 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1978-01-15", "window": { "start": { "local": "1978-01-14T17:42:35+04:00", "utc": "1978-01-14T13:42:35Z", "ms": 253633355344.34116 }, "end": { "local": "1978-01-15T17:43:34+04:00", "utc": "1978-01-15T13:43:34Z", "ms": 253719813705.9702 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1978-01-14", "days": -1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 06:03 on Sat 14 Jan.", "fact": "1978-01-14T02:03:30Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 17:43, and the day of the 15th ends at 17:44.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 41945 s" }, { "step": "counted", "text": "Bhogi is kept the day before Pongal: Saturday 14 January is the day taken above.", "fact": "follows: pongal − 1 d" }, { "step": "ruling", "text": "Bhogi, Tehran, 1978: Friday 13 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "bhogi", "follows": { "festival": "pongal", "days": -1 }, "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } ], "rashi": "Makara", "day_from": "sunset" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-13", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1978-01-13", "statement": "Counted from midnight", "reference": { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1978-01-12", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } } ], "quote": "In Tehran, Bhogi 1978 falls on Friday 13 January. It is kept the day before Pongal, which falls on Saturday 14 January. The Sun enters Makara at 06:03 on Sat 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th. Counted from sunrise, as in Orissa, it is 12 January.", "cite": "https://ahargana.org/tehran/festivals/1978/bhogi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pongal", "festival": "pongal", "name": "Pongal", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 41945, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-02-12T19:05:40+04:00", "utc": "1978-02-12T15:05:40Z", "ms": 256143939667.8633 } }, "span": { "of": "transit", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 } }, "kaala": "sunset-day", "days": [ { "local_date": "1978-01-14", "window": { "start": { "local": "1978-01-13T17:41:38+04:00", "utc": "1978-01-13T13:41:38Z", "ms": 253546897591.28595 }, "end": { "local": "1978-01-14T17:42:35+04:00", "utc": "1978-01-14T13:42:35Z", "ms": 253633355344.34116 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1978-01-15", "window": { "start": { "local": "1978-01-14T17:42:35+04:00", "utc": "1978-01-14T13:42:35Z", "ms": 253633355344.34116 }, "end": { "local": "1978-01-15T17:43:34+04:00", "utc": "1978-01-15T13:43:34Z", "ms": 253719813705.9702 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 06:03 on Sat 14 Jan.", "fact": "1978-01-14T02:03:30Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 17:43, and the day of the 15th ends at 17:44.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 41945 s" }, { "step": "ruling", "text": "Pongal, Tehran, 1978: Saturday 14 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "pongal", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } ], "not_evaluated": "The rule that heads the solar festivals, the day \"taken to begin from midnight\" (p. 106), is not applied to Pongal. It is kept on the first day of the month of Makara as the Tamil districts count it, a transit after sunset going to the next day (p. 244); the Rashtriya Panchang prints Pongal so.", "rashi": "Makara", "day_from": "sunset" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1978-01-14", "statement": "Counted from midnight", "reference": { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1978-01-13", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } } ], "quote": "In Tehran, Pongal 1978 falls on Saturday 14 January. The Sun enters Makara at 06:03 on Sat 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th. Counted from sunrise, as in Orissa, it is 13 January.", "cite": "https://ahargana.org/tehran/festivals/1978/pongal", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/makara-sankranti", "festival": "makara-sankranti", "name": "Makara Saṅkrānti", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21810, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-02-12T19:05:40+04:00", "utc": "1978-02-12T15:05:40Z", "ms": 256143939667.8633 } }, "span": { "of": "transit", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 } }, "kaala": "civil-day", "days": [ { "local_date": "1978-01-13", "window": { "start": { "local": "1978-01-13T00:00:00+04:00", "utc": "1978-01-12T20:00:00Z", "ms": 253483200000 }, "end": { "local": "1978-01-14T00:00:00+04:00", "utc": "1978-01-13T20:00:00Z", "ms": 253569600000 } }, "covered_min": 0, "window_min": 1440, "qualifies": false }, { "local_date": "1978-01-14", "window": { "start": { "local": "1978-01-14T00:00:00+04:00", "utc": "1978-01-13T20:00:00Z", "ms": 253569600000 }, "end": { "local": "1978-01-15T00:00:00+04:00", "utc": "1978-01-14T20:00:00Z", "ms": 253656000000 } }, "covered_min": 1, "window_min": 1440, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 06:03 on Sat 14 Jan.", "fact": "1978-01-14T02:03:30Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from midnight to midnight, on the clock of Tehran.", "fact": "civil-day: midnight-to-midnight · Asia/Tehran" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from midnight. The transit falls on the 14th, not the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from midnight → only-day · margin 21810 s" }, { "step": "ruling", "text": "Makara Saṅkrānti, Tehran, 1978: Saturday 14 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "makara-sankranti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } ], "rashi": "Makara", "day_from": "midnight" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1978-01-13", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } }, { "kind": "reckoning", "id": "sunset-rule", "local_date": "1978-01-14", "statement": "Past sunset, the next day (the Tamil rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } } ], "quote": "In Tehran, Makara Saṅkrānti 1978 falls on Saturday 14 January. The Sun enters Makara at 06:03 on Sat 14 Jan, and the rule counts the day from midnight. Counted from sunrise, as in Orissa, it is 13 January.", "cite": "https://ahargana.org/tehran/festivals/1978/makara-sankranti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/mattu-pongal", "festival": "mattu-pongal", "name": "Mattu Pongal", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 41945, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-02-12T19:05:40+04:00", "utc": "1978-02-12T15:05:40Z", "ms": 256143939667.8633 } }, "span": { "of": "transit", "start": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 }, "end": { "local": "1978-01-14T06:03:30+04:00", "utc": "1978-01-14T02:03:30Z", "ms": 253591409956.62323 } }, "kaala": "sunset-day", "days": [ { "local_date": "1978-01-14", "window": { "start": { "local": "1978-01-13T17:41:38+04:00", "utc": "1978-01-13T13:41:38Z", "ms": 253546897591.28595 }, "end": { "local": "1978-01-14T17:42:35+04:00", "utc": "1978-01-14T13:42:35Z", "ms": 253633355344.34116 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1978-01-15", "window": { "start": { "local": "1978-01-14T17:42:35+04:00", "utc": "1978-01-14T13:42:35Z", "ms": 253633355344.34116 }, "end": { "local": "1978-01-15T17:43:34+04:00", "utc": "1978-01-15T13:43:34Z", "ms": 253719813705.9702 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1978-01-14", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 06:03 on Sat 14 Jan.", "fact": "1978-01-14T02:03:30Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 17:43, and the day of the 15th ends at 17:44.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 41945 s" }, { "step": "counted", "text": "Mattu Pongal is kept the day after Pongal: Saturday 14 January is the day taken above.", "fact": "follows: pongal + 1 d" }, { "step": "ruling", "text": "Mattu Pongal, Tehran, 1978: Sunday 15 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "mattu-pongal", "follows": { "festival": "pongal", "days": 1 }, "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } ], "rashi": "Makara", "day_from": "sunset" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-15", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1978-01-15", "statement": "Counted from midnight", "reference": { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1978-01-14", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } } ], "quote": "In Tehran, Mattu Pongal 1978 falls on Sunday 15 January. It is kept the day after Pongal, which falls on Saturday 14 January. The Sun enters Makara at 06:03 on Sat 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th. Counted from sunrise, as in Orissa, it is 14 January.", "cite": "https://ahargana.org/tehran/festivals/1978/mattu-pongal", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-01-19", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19190, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-01-18T23:50:20+04:00", "utc": "1978-01-18T19:50:20Z", "ms": 254001019858.10507 }, "end": { "local": "1978-01-20T02:22:28+04:00", "utc": "1978-01-19T22:22:28Z", "ms": 254096548407.61392 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-01-18T23:50:20+04:00", "utc": "1978-01-18T19:50:20Z", "ms": 254001019858.10507 }, "end": { "local": "1978-01-20T02:22:28+04:00", "utc": "1978-01-19T22:22:28Z", "ms": 254096548407.61392 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-01-19", "window": { "start": { "local": "1978-01-19T07:42:43+04:00", "utc": "1978-01-19T03:42:43Z", "ms": 254029362901.51703 }, "end": { "local": "1978-01-19T07:42:43+04:00", "utc": "1978-01-19T03:42:43Z", "ms": 254029362901.51703 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-01-20", "window": { "start": { "local": "1978-01-20T07:42:19+04:00", "utc": "1978-01-20T03:42:19Z", "ms": 254115738841.26395 }, "end": { "local": "1978-01-20T07:42:19+04:00", "utc": "1978-01-20T03:42:19Z", "ms": 254115738841.26395 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 23:50 on Wed 18 Jan to 02:22 on Fri 20 Jan.", "fact": "1978-01-18T19:50:20Z → 1978-01-19T22:22:28Z" }, { "step": "kaala", "text": "Sunrise is at 07:43 on the 19th and 07:42 on the 20th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 19th and is not on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 19190 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Tehran, 1978: Thursday 19 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-19", "confidence": "determinate" } ], "quote": "In Tehran, Putradā Ekādaśī 1978 falls on Thursday 19 January. Ekādaśī runs from 23:50 on Wed 18 Jan to 02:22 on Fri 20 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-01-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-01-21", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33537, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-01-21T04:58:37+04:00", "utc": "1978-01-21T00:58:37Z", "ms": 254192316782.679 }, "end": { "local": "1978-01-22T07:29:53+04:00", "utc": "1978-01-22T03:29:53Z", "ms": 254287792858.3773 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-01-21T04:58:37+04:00", "utc": "1978-01-21T00:58:37Z", "ms": 254192316782.679 }, "end": { "local": "1978-01-22T07:29:53+04:00", "utc": "1978-01-22T03:29:53Z", "ms": 254287792858.3773 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-01-20", "window": { "start": { "local": "1978-01-20T17:48:33+04:00", "utc": "1978-01-20T13:48:33Z", "ms": 254152113030.86688 }, "end": { "local": "1978-01-20T19:39:40+04:00", "utc": "1978-01-20T15:39:40Z", "ms": 254158779681.331 } }, "covered_min": 0, "window_min": 111, "qualifies": false }, { "local_date": "1978-01-21", "window": { "start": { "local": "1978-01-21T17:49:34+04:00", "utc": "1978-01-21T13:49:34Z", "ms": 254238574096.1758 }, "end": { "local": "1978-01-21T19:40:29+04:00", "utc": "1978-01-21T15:40:29Z", "ms": 254245228900.1384 } }, "covered_min": 111, "window_min": 111, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:59 on Sat 21 Jan to 07:30 on Sun 22 Jan.", "fact": "1978-01-21T00:58:37Z → 1978-01-22T03:29:53Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:49–19:40 on the 20th, 17:50–19:40 on the 21st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 111 minutes on the 20th and 111 of 111 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33537 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Saturday 21 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-21", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Saturday 21 January. Trayodaśī runs from 04:59 on Sat 21 Jan to 07:30 on Sun 22 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-01-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-01-27", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-01-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16882, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-01-27T16:21:34+04:00", "utc": "1978-01-27T12:21:34Z", "ms": 254751694157.4183 }, "end": { "local": "1978-01-28T17:06:29+04:00", "utc": "1978-01-28T13:06:29Z", "ms": 254840788846.52237 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-01-27T16:21:34+04:00", "utc": "1978-01-27T12:21:34Z", "ms": 254751694157.4183 }, "end": { "local": "1978-01-28T17:06:29+04:00", "utc": "1978-01-28T13:06:29Z", "ms": 254840788846.52237 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-01-27", "window": { "start": { "local": "1978-01-27T21:02:56+04:00", "utc": "1978-01-27T17:02:56Z", "ms": 254768575753.4856 }, "end": { "local": "1978-01-27T21:02:56+04:00", "utc": "1978-01-27T17:02:56Z", "ms": 254768575753.4856 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-01-28", "window": { "start": { "local": "1978-01-28T22:01:11+04:00", "utc": "1978-01-28T18:01:11Z", "ms": 254858471460.93518 }, "end": { "local": "1978-01-28T22:01:11+04:00", "utc": "1978-01-28T18:01:11Z", "ms": 254858471460.93518 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 16:22 on Fri 27 Jan to 17:06 on Sat 28 Jan.", "fact": "1978-01-27T12:21:34Z → 1978-01-28T13:06:29Z" }, { "step": "kaala", "text": "Moonrise is at 21:03 on the 27th and 22:01 on the 28th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 27th and is not on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 16882 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Friday 27 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-01-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-01-27", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Friday 27 January. Caturthī runs from 16:22 on Fri 27 Jan to 17:06 on Sat 28 Jan and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-01-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-02-04", "festival": "ekadashi", "name": "Ṣaṭtilā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1352, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-02-03T10:46:46+04:00", "utc": "1978-02-03T06:46:46Z", "ms": 255336405600.98572 }, "end": { "local": "1978-02-04T07:55:18+04:00", "utc": "1978-02-04T03:55:18Z", "ms": 255412518348.68045 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-03T10:46:46+04:00", "utc": "1978-02-03T06:46:46Z", "ms": 255336405600.98572 }, "end": { "local": "1978-02-04T07:55:18+04:00", "utc": "1978-02-04T03:55:18Z", "ms": 255412518348.68045 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-02-03", "window": { "start": { "local": "1978-02-03T07:33:36+04:00", "utc": "1978-02-03T03:33:36Z", "ms": 255324816168.5099 }, "end": { "local": "1978-02-03T07:33:36+04:00", "utc": "1978-02-03T03:33:36Z", "ms": 255324816168.5099 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-02-04", "window": { "start": { "local": "1978-02-04T07:32:47+04:00", "utc": "1978-02-04T03:32:47Z", "ms": 255411166615.27917 }, "end": { "local": "1978-02-04T07:32:47+04:00", "utc": "1978-02-04T03:32:47Z", "ms": 255411166615.27917 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:47 on Fri 3 Feb to 07:55 on Sat 4 Feb.", "fact": "1978-02-03T06:46:46Z → 1978-02-04T03:55:18Z" }, { "step": "kaala", "text": "Sunrise is at 07:34 on the 3rd and 07:33 on the 4th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 3rd and is on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 1352 s" }, { "step": "ruling", "text": "Ṣaṭtilā Ekādaśī, Tehran, 1978: Saturday 4 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-04", "confidence": "determinate" } ], "quote": "In Tehran, Ṣaṭtilā Ekādaśī 1978 falls on Saturday 4 February. Ekādaśī runs from 10:47 on Fri 3 Feb to 07:55 on Sat 4 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-02-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-02-05", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19934, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-02-05T04:45:05+04:00", "utc": "1978-02-05T00:45:05Z", "ms": 255487504735.0616 }, "end": { "local": "1978-02-06T01:24:49+04:00", "utc": "1978-02-05T21:24:49Z", "ms": 255561889345.26828 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-05T04:45:05+04:00", "utc": "1978-02-05T00:45:05Z", "ms": 255487504735.0616 }, "end": { "local": "1978-02-06T01:24:49+04:00", "utc": "1978-02-05T21:24:49Z", "ms": 255561889345.26828 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-02-04", "window": { "start": { "local": "1978-02-04T18:04:06+04:00", "utc": "1978-02-04T14:04:06Z", "ms": 255449045877.45074 }, "end": { "local": "1978-02-04T19:51:49+04:00", "utc": "1978-02-04T15:51:49Z", "ms": 255455508504.69626 } }, "covered_min": 0, "window_min": 108, "qualifies": false }, { "local_date": "1978-02-05", "window": { "start": { "local": "1978-02-05T18:05:08+04:00", "utc": "1978-02-05T14:05:08Z", "ms": 255535508149.3577 }, "end": { "local": "1978-02-05T19:52:35+04:00", "utc": "1978-02-05T15:52:35Z", "ms": 255541955475.41656 } }, "covered_min": 107, "window_min": 107, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:45 on Sun 5 Feb to 01:25 on Mon 6 Feb.", "fact": "1978-02-05T00:45:05Z → 1978-02-05T21:24:49Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:04–19:52 on the 4th, 18:05–19:53 on the 5th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 108 minutes on the 4th and 107 of 107 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 19934 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Sunday 5 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-05", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Sunday 5 February. Trayodaśī runs from 04:45 on Sun 5 Feb to 01:25 on Mon 6 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-02-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-02-05", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-05", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 764, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-02-06T01:24:49+04:00", "utc": "1978-02-05T21:24:49Z", "ms": 255561889345.26828 }, "end": { "local": "1978-02-06T22:04:20+04:00", "utc": "1978-02-06T18:04:20Z", "ms": 255636260238.04483 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-06T01:24:49+04:00", "utc": "1978-02-05T21:24:49Z", "ms": 255561889345.26828 }, "end": { "local": "1978-02-06T22:04:20+04:00", "utc": "1978-02-06T18:04:20Z", "ms": 255636260238.04483 } }, "kaala": "nishita", "days": [ { "local_date": "1978-02-05", "window": { "start": { "local": "1978-02-06T00:24:06+04:00", "utc": "1978-02-05T20:24:06Z", "ms": 255558245622.0785 }, "end": { "local": "1978-02-06T01:12:06+04:00", "utc": "1978-02-05T21:12:06Z", "ms": 255561125622.0785 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-02-06", "window": { "start": { "local": "1978-02-07T00:24:10+04:00", "utc": "1978-02-06T20:24:10Z", "ms": 255644649725.7705 }, "end": { "local": "1978-02-07T01:12:10+04:00", "utc": "1978-02-06T21:12:10Z", "ms": 255647529725.7705 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 01:25 on Mon 6 Feb to 22:04 on Mon 6 Feb.", "fact": "1978-02-05T21:24:49Z → 1978-02-06T18:04:20Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:24–01:12 on the 5th, 00:24–01:12 on the 6th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 5th and 0 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither night qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 764 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Sunday 5 February.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-05", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-05", "confidence": "boundary" } ], "quote": "In Tehran, Śivarātri 1978 falls on Sunday 5 February. Caturdaśī runs from 01:25 on Mon 6 Feb to 22:04 on Mon 6 Feb, and reaches niśītha on neither day.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-02-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/yama-tarpana", "festival": "yama-tarpana", "name": "Yama Tarpaṇa", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15526, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-02-06T01:24:49+04:00", "utc": "1978-02-05T21:24:49Z", "ms": 255561889345.26828 }, "end": { "local": "1978-02-06T22:04:20+04:00", "utc": "1978-02-06T18:04:20Z", "ms": 255636260238.04483 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-06T01:24:49+04:00", "utc": "1978-02-05T21:24:49Z", "ms": 255561889345.26828 }, "end": { "local": "1978-02-06T22:04:20+04:00", "utc": "1978-02-06T18:04:20Z", "ms": 255636260238.04483 } }, "kaala": "arunodaya", "days": [ { "local_date": "1978-02-06", "window": { "start": { "local": "1978-02-06T05:43:36+04:00", "utc": "1978-02-06T01:43:36Z", "ms": 255577415768.74045 }, "end": { "local": "1978-02-06T07:31:03+04:00", "utc": "1978-02-06T03:31:03Z", "ms": 255583863094.79932 } }, "covered_min": 107, "window_min": 107, "qualifies": true }, { "local_date": "1978-02-07", "window": { "start": { "local": "1978-02-07T05:42:57+04:00", "utc": "1978-02-07T01:42:57Z", "ms": 255663777325.78964 }, "end": { "local": "1978-02-07T07:30:09+04:00", "utc": "1978-02-07T03:30:09Z", "ms": 255670209180.34204 } }, "covered_min": 0, "window_min": 107, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 01:25 on Mon 6 Feb to 22:04 on Mon 6 Feb.", "fact": "1978-02-05T21:24:49Z → 1978-02-06T18:04:20Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:44–07:31 on the 6th, 05:43–07:30 on the 7th.", "fact": "arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during aruṇodaya. It covers 107 of 107 minutes on the 6th and 0 of 107 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one dawn qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15526 s" }, { "step": "ruling", "text": "Yama Tarpaṇa, Tehran, 1978: Monday 6 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "yama-tarpana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Yama tarpana (covering a period of 4 ghatikas before sunrise)" } ], "kaala": "arunodaya", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-06", "confidence": "determinate" } ], "quote": "In Tehran, Yama Tarpaṇa 1978 falls on Monday 6 February. Caturdaśī runs from 01:25 on Mon 6 Feb to 22:04 on Mon 6 Feb and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/tehran/festivals/1978/yama-tarpana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ganesha-jayanti", "festival": "ganesha-jayanti", "name": "Gaṇeśa Jayantī", "everyday": "Maghi Ganesh Jayanti", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1217, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-02-10T12:04:31+04:00", "utc": "1978-02-10T08:04:31Z", "ms": 255945870930.3851 }, "end": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-10T12:04:31+04:00", "utc": "1978-02-10T08:04:31Z", "ms": 255945870930.3851 }, "end": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-02-10", "window": { "start": { "local": "1978-02-10T12:24:48+04:00", "utc": "1978-02-10T08:24:48Z", "ms": 255947087936.32056 }, "end": { "local": "1978-02-10T13:12:48+04:00", "utc": "1978-02-10T09:12:48Z", "ms": 255949967936.32056 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-02-11", "window": { "start": { "local": "1978-02-11T12:24:49+04:00", "utc": "1978-02-11T08:24:49Z", "ms": 256033488755.6571 }, "end": { "local": "1978-02-11T13:12:49+04:00", "utc": "1978-02-11T09:12:49Z", "ms": 256036368755.6571 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:05 on Fri 10 Feb to 11:10 on Sat 11 Feb.", "fact": "1978-02-10T08:04:31Z → 1978-02-11T07:09:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 10th, 12:25–13:13 on the 11th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 10th and 0 of 48 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 1217 s" }, { "step": "ruling", "text": "Gaṇeśa Jayantī, Tehran, 1978: Friday 10 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ganesha-jayanti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-10", "confidence": "determinate" } ], "quote": "In Tehran, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1978 falls on Friday 10 February. Caturthī runs from 12:05 on Fri 10 Feb to 11:10 on Sat 11 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/ganesha-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/tila-chaturthi", "festival": "tila-chaturthi", "name": "Tila Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21946, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-02-10T12:04:31+04:00", "utc": "1978-02-10T08:04:31Z", "ms": 255945870930.3851 }, "end": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-10T12:04:31+04:00", "utc": "1978-02-10T08:04:31Z", "ms": 255945870930.3851 }, "end": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-02-10", "window": { "start": { "local": "1978-02-10T18:10:17+04:00", "utc": "1978-02-10T14:10:17Z", "ms": 255967816742.15424 }, "end": { "local": "1978-02-10T19:56:25+04:00", "utc": "1978-02-10T15:56:25Z", "ms": 255974185145.51413 } }, "covered_min": 106, "window_min": 106, "qualifies": true }, { "local_date": "1978-02-11", "window": { "start": { "local": "1978-02-11T18:11:18+04:00", "utc": "1978-02-11T14:11:18Z", "ms": 256054277743.96072 }, "end": { "local": "1978-02-11T19:57:10+04:00", "utc": "1978-02-11T15:57:10Z", "ms": 256060629926.29224 } }, "covered_min": 0, "window_min": 106, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:05 on Fri 10 Feb to 11:10 on Sat 11 Feb.", "fact": "1978-02-10T08:04:31Z → 1978-02-11T07:09:47Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:10–19:56 on the 10th, 18:11–19:57 on the 11th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during pradoṣa. It covers 106 of 106 minutes on the 10th and 0 of 106 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 21946 s" }, { "step": "ruling", "text": "Tila Caturthī, Tehran, 1978: Friday 10 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "tila-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-10", "confidence": "determinate" } ], "quote": "In Tehran, Tila Caturthī 1978 falls on Friday 10 February. Caturthī runs from 12:05 on Fri 10 Feb to 11:10 on Sat 11 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/tila-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shri-panchami", "festival": "shri-panchami", "name": "Śrī Pañcamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4501, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 }, "end": { "local": "1978-02-12T11:04:07+04:00", "utc": "1978-02-12T07:04:07Z", "ms": 256115046772.8673 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 }, "end": { "local": "1978-02-12T11:04:07+04:00", "utc": "1978-02-12T07:04:07Z", "ms": 256115046772.8673 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-02-11", "window": { "start": { "local": "1978-02-11T12:24:49+04:00", "utc": "1978-02-11T08:24:49Z", "ms": 256033488755.6571 }, "end": { "local": "1978-02-11T13:12:49+04:00", "utc": "1978-02-11T09:12:49Z", "ms": 256036368755.6571 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-02-12", "window": { "start": { "local": "1978-02-12T12:24:49+04:00", "utc": "1978-02-12T08:24:49Z", "ms": 256119888787.10696 }, "end": { "local": "1978-02-12T13:12:49+04:00", "utc": "1978-02-12T09:12:49Z", "ms": 256122768787.10696 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 11:10 on Sat 11 Feb to 11:04 on Sun 12 Feb.", "fact": "1978-02-11T07:09:47Z → 1978-02-12T07:04:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 11th, 12:25–13:13 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 48 of 48 minutes on the 11th and 0 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 4501 s" }, { "step": "ruling", "text": "Śrī Pañcamī, Tehran, 1978: Saturday 11 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shri-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Sri Pancami (purvaviddha), Sarasvati puja (Bengal), Vasanta pancami, Madana pancami." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-11", "confidence": "determinate" } ], "quote": "In Tehran, Śrī Pañcamī 1978 falls on Saturday 11 February. Pañcamī runs from 11:10 on Sat 11 Feb to 11:04 on Sun 12 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/shri-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vasanta-panchami", "festival": "vasanta-panchami", "name": "Vasanta Pañcamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4501, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 }, "end": { "local": "1978-02-12T11:04:07+04:00", "utc": "1978-02-12T07:04:07Z", "ms": 256115046772.8673 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-11T11:09:47+04:00", "utc": "1978-02-11T07:09:47Z", "ms": 256028987432.8366 }, "end": { "local": "1978-02-12T11:04:07+04:00", "utc": "1978-02-12T07:04:07Z", "ms": 256115046772.8673 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-02-11", "window": { "start": { "local": "1978-02-11T12:24:49+04:00", "utc": "1978-02-11T08:24:49Z", "ms": 256033488755.6571 }, "end": { "local": "1978-02-11T13:12:49+04:00", "utc": "1978-02-11T09:12:49Z", "ms": 256036368755.6571 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-02-12", "window": { "start": { "local": "1978-02-12T12:24:49+04:00", "utc": "1978-02-12T08:24:49Z", "ms": 256119888787.10696 }, "end": { "local": "1978-02-12T13:12:49+04:00", "utc": "1978-02-12T09:12:49Z", "ms": 256122768787.10696 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 11:10 on Sat 11 Feb to 11:04 on Sun 12 Feb.", "fact": "1978-02-11T07:09:47Z → 1978-02-12T07:04:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 11th, 12:25–13:13 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 48 of 48 minutes on the 11th and 0 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 4501 s" }, { "step": "ruling", "text": "Vasanta Pañcamī, Tehran, 1978: Saturday 11 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vasanta-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Sri Pancami (purvaviddha), Sarasvati puja (Bengal), Vasanta pancami, Madana pancami." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-11", "confidence": "determinate" } ], "quote": "In Tehran, Vasanta Pañcamī 1978 falls on Saturday 11 February. Pañcamī runs from 11:10 on Sat 11 Feb to 11:04 on Sun 12 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vasanta-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ratha-saptami", "festival": "ratha-saptami", "name": "Ratha Saptamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15764, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1978-02-13T11:47:01+04:00", "utc": "1978-02-13T07:47:01Z", "ms": 256204020977.52606 }, "end": { "local": "1978-02-14T13:13:37+04:00", "utc": "1978-02-14T09:13:37Z", "ms": 256295617187.8517 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-13T11:47:01+04:00", "utc": "1978-02-13T07:47:01Z", "ms": 256204020977.52606 }, "end": { "local": "1978-02-14T13:13:37+04:00", "utc": "1978-02-14T09:13:37Z", "ms": 256295617187.8517 } }, "kaala": "arunodaya", "days": [ { "local_date": "1978-02-13", "window": { "start": { "local": "1978-02-13T05:38:41+04:00", "utc": "1978-02-13T01:38:41Z", "ms": 256181921362.12683 }, "end": { "local": "1978-02-13T07:24:17+04:00", "utc": "1978-02-13T03:24:17Z", "ms": 256188257192.7976 } }, "covered_min": 0, "window_min": 106, "qualifies": false }, { "local_date": "1978-02-14", "window": { "start": { "local": "1978-02-14T05:37:55+04:00", "utc": "1978-02-14T01:37:55Z", "ms": 256268274687.98328 }, "end": { "local": "1978-02-14T07:23:14+04:00", "utc": "1978-02-14T03:23:14Z", "ms": 256274594042.3954 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 11:47 on Mon 13 Feb to 13:14 on Tue 14 Feb.", "fact": "1978-02-13T07:47:01Z → 1978-02-14T09:13:37Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:39–07:24 on the 13th, 05:38–07:23 on the 14th.", "fact": "arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during aruṇodaya. It covers 0 of 106 minutes on the 13th and 105 of 105 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one dawn qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15764 s" }, { "step": "ruling", "text": "Ratha Saptamī, Tehran, 1978: Tuesday 14 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ratha-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Ratha saptami (covering 4 ghatikas before sunrise), Acala saptami, Vidhana saptami, Arogya saptami [purvaviddha]." } ], "kaala": "arunodaya", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-14", "confidence": "determinate" } ], "quote": "In Tehran, Ratha Saptamī 1978 falls on Tuesday 14 February. Saptamī runs from 11:47 on Mon 13 Feb to 13:14 on Tue 14 Feb and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/tehran/festivals/1978/ratha-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-02-18", "festival": "ekadashi", "name": "Jayā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31000, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-02-17T20:11:32+04:00", "utc": "1978-02-17T16:11:32Z", "ms": 256579891864.52603 }, "end": { "local": "1978-02-18T22:41:01+04:00", "utc": "1978-02-18T18:41:01Z", "ms": 256675261185.783 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-17T20:11:32+04:00", "utc": "1978-02-17T16:11:32Z", "ms": 256579891864.52603 }, "end": { "local": "1978-02-18T22:41:01+04:00", "utc": "1978-02-18T18:41:01Z", "ms": 256675261185.783 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-02-18", "window": { "start": { "local": "1978-02-18T07:18:50+04:00", "utc": "1978-02-18T03:18:50Z", "ms": 256619929766.55264 }, "end": { "local": "1978-02-18T07:18:50+04:00", "utc": "1978-02-18T03:18:50Z", "ms": 256619929766.55264 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-02-19", "window": { "start": { "local": "1978-02-19T07:17:41+04:00", "utc": "1978-02-19T03:17:41Z", "ms": 256706260943.95456 }, "end": { "local": "1978-02-19T07:17:41+04:00", "utc": "1978-02-19T03:17:41Z", "ms": 256706260943.95456 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 20:12 on Fri 17 Feb to 22:41 on Sat 18 Feb.", "fact": "1978-02-17T16:11:32Z → 1978-02-18T18:41:01Z" }, { "step": "kaala", "text": "Sunrise is at 07:19 on the 18th and 07:18 on the 19th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 18th and is not on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 31000 s" }, { "step": "ruling", "text": "Jayā Ekādaśī, Tehran, 1978: Saturday 18 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-18", "confidence": "determinate" } ], "quote": "In Tehran, Jayā Ekādaśī 1978 falls on Saturday 18 February. Ekādaśī runs from 20:12 on Fri 17 Feb to 22:41 on Sat 18 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-02-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/bhishma-dvadashi", "festival": "bhishma-dvadashi", "name": "Bhīṣma Dvādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34108, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-02-18T22:41:01+04:00", "utc": "1978-02-18T18:41:01Z", "ms": 256675261185.783 }, "end": { "local": "1978-02-20T00:56:51+04:00", "utc": "1978-02-19T20:56:51Z", "ms": 256769811480.59174 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-18T22:41:01+04:00", "utc": "1978-02-18T18:41:01Z", "ms": 256675261185.783 }, "end": { "local": "1978-02-20T00:56:51+04:00", "utc": "1978-02-19T20:56:51Z", "ms": 256769811480.59174 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-02-18", "window": { "start": { "local": "1978-02-18T12:24:33+04:00", "utc": "1978-02-18T08:24:33Z", "ms": 256638272970.48157 }, "end": { "local": "1978-02-18T13:12:33+04:00", "utc": "1978-02-18T09:12:33Z", "ms": 256641152970.48157 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-02-19", "window": { "start": { "local": "1978-02-19T12:24:28+04:00", "utc": "1978-02-19T08:24:28Z", "ms": 256724667783.17914 }, "end": { "local": "1978-02-19T13:12:28+04:00", "utc": "1978-02-19T09:12:28Z", "ms": 256727547783.17914 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 22:41 on Sat 18 Feb to 00:57 on Mon 20 Feb.", "fact": "1978-02-18T18:41:01Z → 1978-02-19T20:56:51Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 18th, 12:24–13:12 on the 19th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 18th and 48 of 48 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 34108 s" }, { "step": "ruling", "text": "Bhīṣma Dvādaśī, Tehran, 1978: Sunday 19 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bhishma-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Bhisma dvadasi (purvaviddha), Amalaki dvadasi, Santana dvadasi, Varaha dvadasi" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-19", "confidence": "determinate" } ], "quote": "In Tehran, Bhīṣma Dvādaśī 1978 falls on Sunday 19 February. Dvādaśī runs from 22:41 on Sat 18 Feb to 00:57 on Mon 20 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/bhishma-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-02-20", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17639, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-02-20T00:56:51+04:00", "utc": "1978-02-19T20:56:51Z", "ms": 256769811480.59174 }, "end": { "local": "1978-02-21T02:51:57+04:00", "utc": "1978-02-20T22:51:57Z", "ms": 256863117085.5031 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-20T00:56:51+04:00", "utc": "1978-02-19T20:56:51Z", "ms": 256769811480.59174 }, "end": { "local": "1978-02-21T02:51:57+04:00", "utc": "1978-02-20T22:51:57Z", "ms": 256863117085.5031 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-02-19", "window": { "start": { "local": "1978-02-19T18:19:15+04:00", "utc": "1978-02-19T14:19:15Z", "ms": 256745954622.4037 }, "end": { "local": "1978-02-19T20:02:53+04:00", "utc": "1978-02-19T16:02:53Z", "ms": 256752172817.69485 } }, "covered_min": 0, "window_min": 104, "qualifies": false }, { "local_date": "1978-02-20", "window": { "start": { "local": "1978-02-20T18:20:13+04:00", "utc": "1978-02-20T14:20:13Z", "ms": 256832412726.04462 }, "end": { "local": "1978-02-20T20:03:34+04:00", "utc": "1978-02-20T16:03:34Z", "ms": 256838613726.57635 } }, "covered_min": 103, "window_min": 103, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 00:57 on Mon 20 Feb to 02:52 on Tue 21 Feb.", "fact": "1978-02-19T20:56:51Z → 1978-02-20T22:51:57Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:19–20:03 on the 19th, 18:20–20:04 on the 20th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 104 minutes on the 19th and 103 of 103 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 17639 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Monday 20 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-20", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Monday 20 February. Trayodaśī runs from 00:57 on Mon 20 Feb to 02:52 on Tue 21 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-02-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/maghi-purnima", "festival": "maghi-purnima", "name": "Māghī Pūrṇimā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25060, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-02-22T04:22:17+04:00", "utc": "1978-02-22T00:22:17Z", "ms": 256954937383.8415 }, "end": { "local": "1978-02-23T05:26:20+04:00", "utc": "1978-02-23T01:26:20Z", "ms": 257045179946.6771 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1978-02-22T04:22:17+04:00", "utc": "1978-02-22T00:22:17Z", "ms": 256954937383.8415 }, "end": { "local": "1978-02-23T05:26:20+04:00", "utc": "1978-02-23T01:26:20Z", "ms": 257045179946.6771 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-02-22", "window": { "start": { "local": "1978-02-22T12:24:08+04:00", "utc": "1978-02-22T08:24:08Z", "ms": 256983848154.3894 }, "end": { "local": "1978-02-22T13:12:08+04:00", "utc": "1978-02-22T09:12:08Z", "ms": 256986728154.3894 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-02-23", "window": { "start": { "local": "1978-02-23T12:24:00+04:00", "utc": "1978-02-23T08:24:00Z", "ms": 257070240315.50378 }, "end": { "local": "1978-02-23T13:12:00+04:00", "utc": "1978-02-23T09:12:00Z", "ms": 257073120315.50378 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 04:22 on Wed 22 Feb to 05:26 on Thu 23 Feb.", "fact": "1978-02-22T00:22:17Z → 1978-02-23T01:26:20Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:24–13:12 on the 22nd, 12:24–13:12 on the 23rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 22nd and 0 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 25060 s" }, { "step": "ruling", "text": "Māghī Pūrṇimā, Tehran, 1978: Wednesday 22 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "maghi-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Maghi purnima (paraviddha)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-22", "confidence": "determinate" } ], "quote": "In Tehran, Māghī Pūrṇimā 1978 falls on Wednesday 22 February. Pūrṇimā runs from 04:22 on Wed 22 Feb to 05:26 on Thu 23 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/maghi-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-02-26", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-02-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27255, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-02-26T06:04:52+04:00", "utc": "1978-02-26T02:04:52Z", "ms": 257306692086.0093 }, "end": { "local": "1978-02-27T05:29:45+04:00", "utc": "1978-02-27T01:29:45Z", "ms": 257390984527.1286 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-02-26T06:04:52+04:00", "utc": "1978-02-26T02:04:52Z", "ms": 257306692086.0093 }, "end": { "local": "1978-02-27T05:29:45+04:00", "utc": "1978-02-27T01:29:45Z", "ms": 257390984527.1286 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-02-25", "window": { "start": { "local": "1978-02-25T20:54:23+04:00", "utc": "1978-02-25T16:54:23Z", "ms": 257273662970.27176 }, "end": { "local": "1978-02-25T20:54:23+04:00", "utc": "1978-02-25T16:54:23Z", "ms": 257273662970.27176 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-02-26", "window": { "start": { "local": "1978-02-26T21:55:29+04:00", "utc": "1978-02-26T17:55:29Z", "ms": 257363729083.07025 }, "end": { "local": "1978-02-26T21:55:29+04:00", "utc": "1978-02-26T17:55:29Z", "ms": 257363729083.07025 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 06:05 on Sun 26 Feb to 05:30 on Mon 27 Feb.", "fact": "1978-02-26T02:04:52Z → 1978-02-27T01:29:45Z" }, { "step": "kaala", "text": "Moonrise is at 20:54 on the 25th and 21:55 on the 26th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 25th and is on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 27255 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Sunday 26 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-02-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-02-26", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Sunday 26 February. Caturthī runs from 06:05 on Sun 26 Feb to 05:30 on Mon 27 Feb and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-02-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-03-05", "festival": "ekadashi", "name": "Vijayā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32934, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-03-04T18:46:02+04:00", "utc": "1978-03-04T14:46:02Z", "ms": 257870761583.51434 }, "end": { "local": "1978-03-05T16:08:58+04:00", "utc": "1978-03-05T12:08:58Z", "ms": 257947737984.82263 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-04T18:46:02+04:00", "utc": "1978-03-04T14:46:02Z", "ms": 257870761583.51434 }, "end": { "local": "1978-03-05T16:08:58+04:00", "utc": "1978-03-05T12:08:58Z", "ms": 257947737984.82263 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-03-04", "window": { "start": { "local": "1978-03-04T07:01:25+04:00", "utc": "1978-03-04T03:01:25Z", "ms": 257828484630.86185 }, "end": { "local": "1978-03-04T07:01:25+04:00", "utc": "1978-03-04T03:01:25Z", "ms": 257828484630.86185 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-03-05", "window": { "start": { "local": "1978-03-05T07:00:04+04:00", "utc": "1978-03-05T03:00:04Z", "ms": 257914804439.0331 }, "end": { "local": "1978-03-05T07:00:04+04:00", "utc": "1978-03-05T03:00:04Z", "ms": 257914804439.0331 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:46 on Sat 4 Mar to 16:09 on Sun 5 Mar.", "fact": "1978-03-04T14:46:02Z → 1978-03-05T12:08:58Z" }, { "step": "kaala", "text": "Sunrise is at 07:01 on the 4th and 07:00 on the 5th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 4th and is on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 32934 s" }, { "step": "ruling", "text": "Vijayā Ekādaśī, Tehran, 1978: Sunday 5 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-05", "confidence": "determinate" } ], "quote": "In Tehran, Vijayā Ekādaśī 1978 falls on Sunday 5 March. Ekādaśī runs from 18:46 on Sat 4 Mar to 16:09 on Sun 5 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-03-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-03-06", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18178, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-03-06T13:30:14+04:00", "utc": "1978-03-06T09:30:14Z", "ms": 258024613579.3242 }, "end": { "local": "1978-03-07T10:56:47+04:00", "utc": "1978-03-07T06:56:47Z", "ms": 258101807079.71936 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-06T13:30:14+04:00", "utc": "1978-03-06T09:30:14Z", "ms": 258024613579.3242 }, "end": { "local": "1978-03-07T10:56:47+04:00", "utc": "1978-03-07T06:56:47Z", "ms": 258101807079.71936 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-03-06", "window": { "start": { "local": "1978-03-06T18:33:12+04:00", "utc": "1978-03-06T14:33:12Z", "ms": 258042792036.57718 }, "end": { "local": "1978-03-06T20:12:25+04:00", "utc": "1978-03-06T16:12:25Z", "ms": 258048745416.14682 } }, "covered_min": 99, "window_min": 99, "qualifies": true }, { "local_date": "1978-03-07", "window": { "start": { "local": "1978-03-07T18:34:05+04:00", "utc": "1978-03-07T14:34:05Z", "ms": 258129245477.97064 }, "end": { "local": "1978-03-07T20:13:01+04:00", "utc": "1978-03-07T16:13:01Z", "ms": 258135180824.3051 } }, "covered_min": 0, "window_min": 99, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:30 on Mon 6 Mar to 10:57 on Tue 7 Mar.", "fact": "1978-03-06T09:30:14Z → 1978-03-07T06:56:47Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:33–20:12 on the 6th, 18:34–20:13 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 99 of 99 minutes on the 6th and 0 of 99 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18178 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Monday 6 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-06", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Monday 6 March. Trayodaśī runs from 13:30 on Mon 6 Mar to 10:57 on Tue 7 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-03-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/maha-shivaratri", "festival": "maha-shivaratri", "name": "Mahāśivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26829, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-03-07T10:56:47+04:00", "utc": "1978-03-07T06:56:47Z", "ms": 258101807079.71936 }, "end": { "local": "1978-03-08T08:36:12+04:00", "utc": "1978-03-08T04:36:12Z", "ms": 258179771816.43063 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-07T10:56:47+04:00", "utc": "1978-03-07T06:56:47Z", "ms": 258101807079.71936 }, "end": { "local": "1978-03-08T08:36:12+04:00", "utc": "1978-03-08T04:36:12Z", "ms": 258179771816.43063 } }, "kaala": "nishita", "days": [ { "local_date": "1978-03-06", "window": { "start": { "local": "1978-03-07T00:21:17+04:00", "utc": "1978-03-06T20:21:17Z", "ms": 258063677209.96338 }, "end": { "local": "1978-03-07T01:09:17+04:00", "utc": "1978-03-06T21:09:17Z", "ms": 258066557209.96338 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-03-07", "window": { "start": { "local": "1978-03-08T00:21:03+04:00", "utc": "1978-03-07T20:21:03Z", "ms": 258150063026.72488 }, "end": { "local": "1978-03-08T01:09:03+04:00", "utc": "1978-03-07T21:09:03Z", "ms": 258152943026.72488 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:57 on Tue 7 Mar to 08:36 on Wed 8 Mar.", "fact": "1978-03-07T06:56:47Z → 1978-03-08T04:36:12Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:21–01:09 on the 6th, 00:21–01:09 on the 7th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 6th and 48 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 26829 s" }, { "step": "ruling", "text": "Mahāśivarātri, Tehran, 1978: Tuesday 7 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "maha-shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Mahasivaratri (nisithavyapini) — In some opinion it is to be observed on nisitha and in some opinion on pradosa. If occurs on two successive nisithas then according to Hemadri it is to be observed on the first day and according to Madhava, to be observed on the second day" } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "disputed", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-07", "confidence": "determinate" } ], "quote": "In Tehran, Mahāśivarātri 1978 falls on Tuesday 7 March. Caturdaśī runs from 10:57 on Tue 7 Mar to 08:36 on Wed 8 Mar and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/maha-shivaratri", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-03-12", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29204, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-03-12T03:49:15+04:00", "utc": "1978-03-11T23:49:15Z", "ms": 258508154852.39438 }, "end": { "local": "1978-03-13T04:13:29+04:00", "utc": "1978-03-13T00:13:29Z", "ms": 258596008948.29654 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-12T03:49:15+04:00", "utc": "1978-03-11T23:49:15Z", "ms": 258508154852.39438 }, "end": { "local": "1978-03-13T04:13:29+04:00", "utc": "1978-03-13T00:13:29Z", "ms": 258596008948.29654 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-03-12", "window": { "start": { "local": "1978-03-12T12:20:29+04:00", "utc": "1978-03-12T08:20:29Z", "ms": 258538828705.48645 }, "end": { "local": "1978-03-12T13:08:29+04:00", "utc": "1978-03-12T09:08:29Z", "ms": 258541708705.48645 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-03-13", "window": { "start": { "local": "1978-03-13T12:20:13+04:00", "utc": "1978-03-13T08:20:13Z", "ms": 258625212654.4347 }, "end": { "local": "1978-03-13T13:08:13+04:00", "utc": "1978-03-13T09:08:13Z", "ms": 258628092654.4347 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 03:49 on Sun 12 Mar to 04:13 on Mon 13 Mar.", "fact": "1978-03-11T23:49:15Z → 1978-03-13T00:13:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:20–13:08 on the 12th, 12:20–13:08 on the 13th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 12th and 0 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 29204 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Sunday 12 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-12", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Sunday 12 March. Caturthī runs from 03:49 on Sun 12 Mar to 04:13 on Mon 13 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-03-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-03-20", "festival": "ekadashi", "name": "Āmalakī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34614, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-03-19T16:17:29+04:00", "utc": "1978-03-19T12:17:29Z", "ms": 259157849166.2697 }, "end": { "local": "1978-03-20T18:11:20+04:00", "utc": "1978-03-20T14:11:20Z", "ms": 259251079769.32217 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-19T16:17:29+04:00", "utc": "1978-03-19T12:17:29Z", "ms": 259157849166.2697 }, "end": { "local": "1978-03-20T18:11:20+04:00", "utc": "1978-03-20T14:11:20Z", "ms": 259251079769.32217 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-03-19", "window": { "start": { "local": "1978-03-19T06:40:35+04:00", "utc": "1978-03-19T02:40:35Z", "ms": 259123234809.8868 }, "end": { "local": "1978-03-19T06:40:35+04:00", "utc": "1978-03-19T02:40:35Z", "ms": 259123234809.8868 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-03-20", "window": { "start": { "local": "1978-03-20T06:39:09+04:00", "utc": "1978-03-20T02:39:09Z", "ms": 259209549044.1825 }, "end": { "local": "1978-03-20T06:39:09+04:00", "utc": "1978-03-20T02:39:09Z", "ms": 259209549044.1825 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:17 on Sun 19 Mar to 18:11 on Mon 20 Mar.", "fact": "1978-03-19T12:17:29Z → 1978-03-20T14:11:20Z" }, { "step": "kaala", "text": "Sunrise is at 06:41 on the 19th and 06:39 on the 20th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 19th and is on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 34614 s" }, { "step": "ruling", "text": "Āmalakī Ekādaśī, Tehran, 1978: Monday 20 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-20", "confidence": "determinate" } ], "quote": "In Tehran, Āmalakī Ekādaśī 1978 falls on Monday 20 March. Ekādaśī runs from 16:17 on Sun 19 Mar to 18:11 on Mon 20 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-03-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-03-22", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-22", "confidence": "boundary", "boundary_reasons": [ "margin", "tie-break-unstated" ], "boundary_margin_s": 207, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-03-21T19:35:11+04:00", "utc": "1978-03-21T15:35:11Z", "ms": 259342510839.5215 }, "end": { "local": "1978-03-22T20:24:47+04:00", "utc": "1978-03-22T16:24:47Z", "ms": 259431887404.13104 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-21T19:35:11+04:00", "utc": "1978-03-21T15:35:11Z", "ms": 259342510839.5215 }, "end": { "local": "1978-03-22T20:24:47+04:00", "utc": "1978-03-22T16:24:47Z", "ms": 259431887404.13104 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-03-21", "window": { "start": { "local": "1978-03-21T18:46:07+04:00", "utc": "1978-03-21T14:46:07Z", "ms": 259339567425.16226 }, "end": { "local": "1978-03-21T20:20:49+04:00", "utc": "1978-03-21T16:20:49Z", "ms": 259345248719.45917 } }, "covered_min": 46, "window_min": 95, "qualifies": true }, { "local_date": "1978-03-22", "window": { "start": { "local": "1978-03-22T18:46:57+04:00", "utc": "1978-03-22T14:46:57Z", "ms": 259426017474.6177 }, "end": { "local": "1978-03-22T20:21:21+04:00", "utc": "1978-03-22T16:21:21Z", "ms": 259431680617.85428 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:35 on Tue 21 Mar to 20:25 on Wed 22 Mar.", "fact": "1978-03-21T15:35:11Z → 1978-03-22T16:24:47Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:46–20:21 on the 21st, 18:47–20:21 on the 22nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 46 of 95 minutes on the 21st and 94 of 94 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 207 s < 300 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Wednesday 22 March.", "fact": "confidence: boundary (margin, tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-22", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-22", "confidence": "boundary" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Wednesday 22 March. Trayodaśī runs from 19:35 on Tue 21 Mar to 20:25 on Wed 22 Mar and covers all of pradoṣa that evening. It also reaches the previous evening for 46 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 3 min 27 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-03-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/holika-dahana", "festival": "holika-dahana", "name": "Holikā Dahana", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5481, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-03-23T20:39:11+04:00", "utc": "1978-03-23T16:39:11Z", "ms": 259519151203.04565 }, "end": { "local": "1978-03-24T20:19:59+04:00", "utc": "1978-03-24T16:19:59Z", "ms": 259604398656.81165 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-23T20:39:11+04:00", "utc": "1978-03-23T16:39:11Z", "ms": 259519151203.04565 }, "end": { "local": "1978-03-24T20:19:59+04:00", "utc": "1978-03-24T16:19:59Z", "ms": 259604398656.81165 } }, "kaala": "sayahna", "days": [ { "local_date": "1978-03-23", "window": { "start": { "local": "1978-03-23T16:21:12+04:00", "utc": "1978-03-23T12:21:12Z", "ms": 259503672119.82346 }, "end": { "local": "1978-03-23T18:47:47+04:00", "utc": "1978-03-23T14:47:47Z", "ms": 259512467387.55634 } }, "covered_min": 0, "window_min": 147, "qualifies": false }, { "local_date": "1978-03-24", "window": { "start": { "local": "1978-03-24T16:21:35+04:00", "utc": "1978-03-24T12:21:35Z", "ms": 259590094728.15677 }, "end": { "local": "1978-03-24T18:48:37+04:00", "utc": "1978-03-24T14:48:37Z", "ms": 259598917179.559 } }, "covered_min": 147, "window_min": 147, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 20:39 on Thu 23 Mar to 20:20 on Fri 24 Mar.", "fact": "1978-03-23T16:39:11Z → 1978-03-24T16:19:59Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:21–18:48 on the 23rd, 16:22–18:49 on the 24th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 0 of 147 minutes on the 23rd and 147 of 147 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one late afternoon qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5481 s" }, { "step": "ruling", "text": "Holikā Dahana, Tehran, 1978: Friday 24 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "holika-dahana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Holika-dahana (Sayahnavyapini — it should be observed on second half of purnima at night), Dolayatra (Bengal & Orissa) (covering 4 ghatikas before sunrise of the day of festival), Holi — on the day after Holikadahana." } ], "not_evaluated": "The hour the row gives for the rite (\"it should be observed on second half of purnima at night\") is not tested: sāyāhna alone settles the day.", "kaala": "sayahna", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-24", "confidence": "determinate" } ], "quote": "In Tehran, Holikā Dahana 1978 falls on Friday 24 March. Pūrṇimā runs from 20:39 on Thu 23 Mar to 20:20 on Fri 24 Mar and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/tehran/festivals/1978/holika-dahana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/holi", "festival": "holi", "name": "Holī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5481, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-03-23T20:39:11+04:00", "utc": "1978-03-23T16:39:11Z", "ms": 259519151203.04565 }, "end": { "local": "1978-03-24T20:19:59+04:00", "utc": "1978-03-24T16:19:59Z", "ms": 259604398656.81165 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1978-03-23T20:39:11+04:00", "utc": "1978-03-23T16:39:11Z", "ms": 259519151203.04565 }, "end": { "local": "1978-03-24T20:19:59+04:00", "utc": "1978-03-24T16:19:59Z", "ms": 259604398656.81165 } }, "kaala": "sayahna", "days": [ { "local_date": "1978-03-23", "window": { "start": { "local": "1978-03-23T16:21:12+04:00", "utc": "1978-03-23T12:21:12Z", "ms": 259503672119.82346 }, "end": { "local": "1978-03-23T18:47:47+04:00", "utc": "1978-03-23T14:47:47Z", "ms": 259512467387.55634 } }, "covered_min": 0, "window_min": 147, "qualifies": false }, { "local_date": "1978-03-24", "window": { "start": { "local": "1978-03-24T16:21:35+04:00", "utc": "1978-03-24T12:21:35Z", "ms": 259590094728.15677 }, "end": { "local": "1978-03-24T18:48:37+04:00", "utc": "1978-03-24T14:48:37Z", "ms": 259598917179.559 } }, "covered_min": 147, "window_min": 147, "qualifies": true } ], "follows": { "festival": "holika-dahana", "name": "Holikā Dahana", "local_date": "1978-03-24", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 20:39 on Thu 23 Mar to 20:20 on Fri 24 Mar.", "fact": "1978-03-23T16:39:11Z → 1978-03-24T16:19:59Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:21–18:48 on the 23rd, 16:22–18:49 on the 24th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 0 of 147 minutes on the 23rd and 147 of 147 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one late afternoon qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5481 s" }, { "step": "counted", "text": "Holī is kept the day after Holikā Dahana: Friday 24 March is the day taken above.", "fact": "follows: holika-dahana + 1 d" }, { "step": "ruling", "text": "Holī, Tehran, 1978: Saturday 25 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "holi", "follows": { "festival": "holika-dahana", "days": 1 }, "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Holika-dahana (Sayahnavyapini — it should be observed on second half of purnima at night), Dolayatra (Bengal & Orissa) (covering 4 ghatikas before sunrise of the day of festival), Holi — on the day after Holikadahana." } ], "kaala": "sayahna", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-25", "confidence": "determinate" } ], "quote": "In Tehran, Holī 1978 falls on Saturday 25 March. It is kept the day after Holikā Dahana, which falls on Friday 24 March. Pūrṇimā runs from 20:39 on Thu 23 Mar to 20:20 on Fri 24 Mar and covers all of sāyāhna on the 24th.", "cite": "https://ahargana.org/tehran/festivals/1978/holi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vasantotsava", "festival": "vasantotsava", "name": "Vasantotsava", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36720, "anga": { "type": "tithi", "index": 15, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1978-03-24T20:19:59+04:00", "utc": "1978-03-24T16:19:59Z", "ms": 259604398656.81165 }, "end": { "local": "1978-03-25T20:30:32+05:00", "utc": "1978-03-25T15:30:32Z", "ms": 259687832436.48813 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-03-24T20:19:59+04:00", "utc": "1978-03-24T16:19:59Z", "ms": 259604398656.81165 }, "end": { "local": "1978-03-25T20:30:32+05:00", "utc": "1978-03-25T15:30:32Z", "ms": 259687832436.48813 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-03-25", "window": { "start": { "local": "1978-03-25T07:31:59+05:00", "utc": "1978-03-25T02:31:59Z", "ms": 259641118785.34375 }, "end": { "local": "1978-03-25T07:31:59+05:00", "utc": "1978-03-25T02:31:59Z", "ms": 259641118785.34375 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-03-26", "window": { "start": { "local": "1978-03-26T07:30:33+05:00", "utc": "1978-03-26T02:30:33Z", "ms": 259727432669.45197 }, "end": { "local": "1978-03-26T07:30:33+05:00", "utc": "1978-03-26T02:30:33Z", "ms": 259727432669.45197 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 20:20 on Fri 24 Mar to 20:31 on Sat 25 Mar.", "fact": "1978-03-24T16:19:59Z → 1978-03-25T15:30:32Z" }, { "step": "kaala", "text": "Sunrise is at 07:32 on the 25th and 07:31 on the 26th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be current at sunrise. It is on the 25th and is not on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 36720 s" }, { "step": "ruling", "text": "Vasantotsava, Tehran, 1978: Saturday 25 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vasantotsava", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 1 Vasantotsava (current at sunrise, if occurs on two successive days, it is to be observed on the first day)." } ], "kaala": "sunrise", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-25", "confidence": "determinate" } ], "quote": "In Tehran, Vasantotsava 1978 falls on Saturday 25 March. Pratipadā runs from 20:20 on Fri 24 Mar to 20:31 on Sat 25 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/vasantotsava", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-03-27", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18817, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-03-27T17:39:05+05:00", "utc": "1978-03-27T12:39:05Z", "ms": 259850344665.44083 }, "end": { "local": "1978-03-28T15:46:48+05:00", "utc": "1978-03-28T10:46:48Z", "ms": 259930007780.28647 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-03-27T17:39:05+05:00", "utc": "1978-03-27T12:39:05Z", "ms": 259850344665.44083 }, "end": { "local": "1978-03-28T15:46:48+05:00", "utc": "1978-03-28T10:46:48Z", "ms": 259930007780.28647 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-03-27", "window": { "start": { "local": "1978-03-27T22:52:42+05:00", "utc": "1978-03-27T17:52:42Z", "ms": 259869162017.33386 }, "end": { "local": "1978-03-27T22:52:42+05:00", "utc": "1978-03-27T17:52:42Z", "ms": 259869162017.33386 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-03-28", "window": { "start": { "local": "1978-03-28T23:56:46+05:00", "utc": "1978-03-28T18:56:46Z", "ms": 259959405857.7918 }, "end": { "local": "1978-03-28T23:56:46+05:00", "utc": "1978-03-28T18:56:46Z", "ms": 259959405857.7918 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:39 on Mon 27 Mar to 15:47 on Tue 28 Mar.", "fact": "1978-03-27T12:39:05Z → 1978-03-28T10:46:48Z" }, { "step": "kaala", "text": "Moonrise is at 22:53 on the 27th and 23:57 on the 28th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 27th and is not on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18817 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Monday 27 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-27", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Monday 27 March. Caturthī runs from 17:39 on Mon 27 Mar to 15:47 on Tue 28 Mar and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-03-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shitalashtami", "festival": "shitalashtami", "name": "Śītalāṣṭamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-03-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14213, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-03-31T09:18:00+05:00", "utc": "1978-03-31T04:18:00Z", "ms": 260165880431.61163 }, "end": { "local": "1978-04-01T07:03:59+05:00", "utc": "1978-04-01T02:03:59Z", "ms": 260244239328.4559 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-03-31T09:18:00+05:00", "utc": "1978-03-31T04:18:00Z", "ms": 260165880431.61163 }, "end": { "local": "1978-04-01T07:03:59+05:00", "utc": "1978-04-01T02:03:59Z", "ms": 260244239328.4559 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-03-31", "window": { "start": { "local": "1978-03-31T13:14:54+05:00", "utc": "1978-03-31T08:14:54Z", "ms": 260180093604.33978 }, "end": { "local": "1978-03-31T14:02:54+05:00", "utc": "1978-03-31T09:02:54Z", "ms": 260182973604.33978 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-04-01", "window": { "start": { "local": "1978-04-01T13:14:36+05:00", "utc": "1978-04-01T08:14:36Z", "ms": 260266475633.5296 }, "end": { "local": "1978-04-01T14:02:36+05:00", "utc": "1978-04-01T09:02:36Z", "ms": 260269355633.5296 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 09:18 on Fri 31 Mar to 07:04 on Sat 1 Apr.", "fact": "1978-03-31T04:18:00Z → 1978-04-01T02:03:59Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:15–14:03 on the 31st, 13:15–14:03 on the 1st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 31st and 0 of 48 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 14213 s" }, { "step": "ruling", "text": "Śītalāṣṭamī, Tehran, 1978: Friday 31 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shitalashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Sitalastami, (purvaviddha)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-03-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-03-31", "confidence": "determinate" } ], "quote": "In Tehran, Śītalāṣṭamī 1978 falls on Friday 31 March. Aṣṭamī runs from 09:18 on Fri 31 Mar to 07:04 on Sat 1 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/shitalashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-04-03", "festival": "ekadashi", "name": "Pāpamocanī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16176, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-04-03T02:49:32+05:00", "utc": "1978-04-02T21:49:32Z", "ms": 260401772415.9956 }, "end": { "local": "1978-04-04T00:55:39+05:00", "utc": "1978-04-03T19:55:39Z", "ms": 260481339169.90897 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-03T02:49:32+05:00", "utc": "1978-04-02T21:49:32Z", "ms": 260401772415.9956 }, "end": { "local": "1978-04-04T00:55:39+05:00", "utc": "1978-04-03T19:55:39Z", "ms": 260481339169.90897 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-04-03", "window": { "start": { "local": "1978-04-03T07:19:08+05:00", "utc": "1978-04-03T02:19:08Z", "ms": 260417948331.78195 }, "end": { "local": "1978-04-03T07:19:08+05:00", "utc": "1978-04-03T02:19:08Z", "ms": 260417948331.78195 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-04-04", "window": { "start": { "local": "1978-04-04T07:17:44+05:00", "utc": "1978-04-04T02:17:44Z", "ms": 260504263820.65158 }, "end": { "local": "1978-04-04T07:17:44+05:00", "utc": "1978-04-04T02:17:44Z", "ms": 260504263820.65158 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 02:50 on Mon 3 Apr to 00:56 on Tue 4 Apr.", "fact": "1978-04-02T21:49:32Z → 1978-04-03T19:55:39Z" }, { "step": "kaala", "text": "Sunrise is at 07:19 on the 3rd and 07:18 on the 4th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 3rd and is not on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 16176 s" }, { "step": "ruling", "text": "Pāpamocanī Ekādaśī, Tehran, 1978: Monday 3 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-03", "confidence": "determinate" } ], "quote": "In Tehran, Pāpamocanī Ekādaśī 1978 falls on Monday 3 April. Ekādaśī runs from 02:50 on Mon 3 Apr to 00:56 on Tue 4 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-04-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-04-05", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1423, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-04-04T23:15:20+05:00", "utc": "1978-04-04T18:15:20Z", "ms": 260561719573.92673 }, "end": { "local": "1978-04-05T21:52:25+05:00", "utc": "1978-04-05T16:52:25Z", "ms": 260643144625.09888 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-04T23:15:20+05:00", "utc": "1978-04-04T18:15:20Z", "ms": 260561719573.92673 }, "end": { "local": "1978-04-05T21:52:25+05:00", "utc": "1978-04-05T16:52:25Z", "ms": 260643144625.09888 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-04-04", "window": { "start": { "local": "1978-04-04T19:57:41+05:00", "utc": "1978-04-04T14:57:41Z", "ms": 260549861210.8617 }, "end": { "local": "1978-04-04T21:28:10+05:00", "utc": "1978-04-04T16:28:10Z", "ms": 260555290333.8217 } }, "covered_min": 0, "window_min": 90, "qualifies": false }, { "local_date": "1978-04-05", "window": { "start": { "local": "1978-04-05T19:58:31+05:00", "utc": "1978-04-05T14:58:31Z", "ms": 260636310626.98798 }, "end": { "local": "1978-04-05T21:28:42+05:00", "utc": "1978-04-05T16:28:42Z", "ms": 260641721982.7325 } }, "covered_min": 90, "window_min": 90, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 23:15 on Tue 4 Apr to 21:52 on Wed 5 Apr.", "fact": "1978-04-04T18:15:20Z → 1978-04-05T16:52:25Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:58–21:28 on the 4th, 19:59–21:29 on the 5th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 90 minutes on the 4th and 90 of 90 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1423 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Wednesday 5 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-05", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Wednesday 5 April. Trayodaśī runs from 23:15 on Tue 4 Apr to 21:52 on Wed 5 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-04-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-04-05", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12019, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-04-05T21:52:25+05:00", "utc": "1978-04-05T16:52:25Z", "ms": 260643144625.09888 }, "end": { "local": "1978-04-06T20:50:59+05:00", "utc": "1978-04-06T15:50:59Z", "ms": 260725858979.33188 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-05T21:52:25+05:00", "utc": "1978-04-05T16:52:25Z", "ms": 260643144625.09888 }, "end": { "local": "1978-04-06T20:50:59+05:00", "utc": "1978-04-06T15:50:59Z", "ms": 260725858979.33188 } }, "kaala": "nishita", "days": [ { "local_date": "1978-04-05", "window": { "start": { "local": "1978-04-06T01:12:43+05:00", "utc": "1978-04-05T20:12:43Z", "ms": 260655163211.03003 }, "end": { "local": "1978-04-06T02:00:43+05:00", "utc": "1978-04-05T21:00:43Z", "ms": 260658043211.03003 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-04-06", "window": { "start": { "local": "1978-04-07T01:12:26+05:00", "utc": "1978-04-06T20:12:26Z", "ms": 260741546198.19547 }, "end": { "local": "1978-04-07T02:00:26+05:00", "utc": "1978-04-06T21:00:26Z", "ms": 260744426198.19547 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 21:52 on Wed 5 Apr to 20:51 on Thu 6 Apr.", "fact": "1978-04-05T16:52:25Z → 1978-04-06T15:50:59Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 01:13–02:01 on the 5th, 01:12–02:00 on the 6th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 5th and 0 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 12019 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Wednesday 5 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-05", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Wednesday 5 April. Caturdaśī runs from 21:52 on Wed 5 Apr to 20:51 on Thu 6 Apr and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-04-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/navaratra-arambha-caitra", "festival": "navaratra-arambha-caitra", "name": "Navarātrārambha (Caitra)", "everyday": "Chaitra Navratri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22083, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1978-04-07T20:15:08+05:00", "utc": "1978-04-07T15:15:08Z", "ms": 260810108446.95917 }, "end": { "local": "1978-04-08T20:08:37+05:00", "utc": "1978-04-08T15:08:37Z", "ms": 260896116953.92432 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-07T20:15:08+05:00", "utc": "1978-04-07T15:15:08Z", "ms": 260810108446.95917 }, "end": { "local": "1978-04-08T20:08:37+05:00", "utc": "1978-04-08T15:08:37Z", "ms": 260896116953.92432 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-07", "window": { "start": { "local": "1978-04-07T13:12:51+05:00", "utc": "1978-04-07T08:12:51Z", "ms": 260784770928.52045 }, "end": { "local": "1978-04-07T14:00:51+05:00", "utc": "1978-04-07T09:00:51Z", "ms": 260787650928.52045 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-04-08", "window": { "start": { "local": "1978-04-08T13:12:34+05:00", "utc": "1978-04-08T08:12:34Z", "ms": 260871154140.62427 }, "end": { "local": "1978-04-08T14:00:34+05:00", "utc": "1978-04-08T09:00:34Z", "ms": 260874034140.62427 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 20:15 on Fri 7 Apr to 20:09 on Sat 8 Apr.", "fact": "1978-04-07T15:15:08Z → 1978-04-08T15:08:37Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:13–14:01 on the 7th, 13:13–14:01 on the 8th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during madhyāhna. It covers 0 of 48 minutes on the 7th and 48 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 22083 s" }, { "step": "ruling", "text": "Navarātrārambha (Caitra), Tehran, 1978: Saturday 8 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "navaratra-arambha-caitra", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 1 Navaratrarambha (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-08", "confidence": "determinate" } ], "quote": "In Tehran, Navarātrārambha (Caitra) (Chaitra Navratri) 1978 falls on Saturday 8 April. Pratipadā runs from 20:15 on Fri 7 Apr to 20:09 on Sat 8 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/navaratra-arambha-caitra", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/gauri-tritiya", "festival": "gauri-tritiya", "name": "Gaurī Tṛtīyā", "everyday": "Gangaur", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23635, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-04-09T20:34:12+05:00", "utc": "1978-04-09T15:34:12Z", "ms": 260984052166.33643 }, "end": { "local": "1978-04-10T21:33:01+05:00", "utc": "1978-04-10T16:33:01Z", "ms": 261073981124.47678 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-09T20:34:12+05:00", "utc": "1978-04-09T15:34:12Z", "ms": 260984052166.33643 }, "end": { "local": "1978-04-10T21:33:01+05:00", "utc": "1978-04-10T16:33:01Z", "ms": 261073981124.47678 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-09", "window": { "start": { "local": "1978-04-09T13:12:18+05:00", "utc": "1978-04-09T08:12:18Z", "ms": 260957537579.5625 }, "end": { "local": "1978-04-09T14:00:18+05:00", "utc": "1978-04-09T09:00:18Z", "ms": 260960417579.5625 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-04-10", "window": { "start": { "local": "1978-04-10T13:12:01+05:00", "utc": "1978-04-10T08:12:01Z", "ms": 261043921259.08746 }, "end": { "local": "1978-04-10T14:00:01+05:00", "utc": "1978-04-10T09:00:01Z", "ms": 261046801259.08746 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 20:34 on Sun 9 Apr to 21:33 on Mon 10 Apr.", "fact": "1978-04-09T15:34:12Z → 1978-04-10T16:33:01Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:12–14:00 on the 9th, 13:12–14:00 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 23635 s" }, { "step": "ruling", "text": "Gaurī Tṛtīyā, Tehran, 1978: Monday 10 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "gauri-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Dolotsava, Gauri trtiya, Andolana trtiya, Saubhagya sayana vrata (paraviddha), Sarhul (Bihar)." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-10", "confidence": "determinate" } ], "quote": "In Tehran, Gaurī Tṛtīyā (Gangaur) 1978 falls on Monday 10 April. Tṛtīyā runs from 20:34 on Sun 9 Apr to 21:33 on Mon 10 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/gauri-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/saubhagya-shayana-vrata", "festival": "saubhagya-shayana-vrata", "name": "Saubhāgya Śayana Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23635, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-04-09T20:34:12+05:00", "utc": "1978-04-09T15:34:12Z", "ms": 260984052166.33643 }, "end": { "local": "1978-04-10T21:33:01+05:00", "utc": "1978-04-10T16:33:01Z", "ms": 261073981124.47678 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-09T20:34:12+05:00", "utc": "1978-04-09T15:34:12Z", "ms": 260984052166.33643 }, "end": { "local": "1978-04-10T21:33:01+05:00", "utc": "1978-04-10T16:33:01Z", "ms": 261073981124.47678 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-09", "window": { "start": { "local": "1978-04-09T13:12:18+05:00", "utc": "1978-04-09T08:12:18Z", "ms": 260957537579.5625 }, "end": { "local": "1978-04-09T14:00:18+05:00", "utc": "1978-04-09T09:00:18Z", "ms": 260960417579.5625 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-04-10", "window": { "start": { "local": "1978-04-10T13:12:01+05:00", "utc": "1978-04-10T08:12:01Z", "ms": 261043921259.08746 }, "end": { "local": "1978-04-10T14:00:01+05:00", "utc": "1978-04-10T09:00:01Z", "ms": 261046801259.08746 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 20:34 on Sun 9 Apr to 21:33 on Mon 10 Apr.", "fact": "1978-04-09T15:34:12Z → 1978-04-10T16:33:01Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:12–14:00 on the 9th, 13:12–14:00 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 23635 s" }, { "step": "ruling", "text": "Saubhāgya Śayana Vrata, Tehran, 1978: Monday 10 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "saubhagya-shayana-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Dolotsava, Gauri trtiya, Andolana trtiya, Saubhagya sayana vrata (paraviddha), Sarhul (Bihar)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-10", "confidence": "determinate" } ], "quote": "In Tehran, Saubhāgya Śayana Vrata 1978 falls on Monday 10 April. Tṛtīyā runs from 20:34 on Sun 9 Apr to 21:33 on Mon 10 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/saubhagya-shayana-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-04-11", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27180, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-04-10T21:33:01+05:00", "utc": "1978-04-10T16:33:01Z", "ms": 261073981124.47678 }, "end": { "local": "1978-04-11T23:03:41+05:00", "utc": "1978-04-11T18:03:41Z", "ms": 261165821342.38876 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-10T21:33:01+05:00", "utc": "1978-04-10T16:33:01Z", "ms": 261073981124.47678 }, "end": { "local": "1978-04-11T23:03:41+05:00", "utc": "1978-04-11T18:03:41Z", "ms": 261165821342.38876 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-10", "window": { "start": { "local": "1978-04-10T13:12:01+05:00", "utc": "1978-04-10T08:12:01Z", "ms": 261043921259.08746 }, "end": { "local": "1978-04-10T14:00:01+05:00", "utc": "1978-04-10T09:00:01Z", "ms": 261046801259.08746 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-04-11", "window": { "start": { "local": "1978-04-11T13:11:45+05:00", "utc": "1978-04-11T08:11:45Z", "ms": 261130305193.14258 }, "end": { "local": "1978-04-11T13:59:45+05:00", "utc": "1978-04-11T08:59:45Z", "ms": 261133185193.14258 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:33 on Mon 10 Apr to 23:04 on Tue 11 Apr.", "fact": "1978-04-10T16:33:01Z → 1978-04-11T18:03:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:12–14:00 on the 10th, 13:12–14:00 on the 11th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 10th and 48 of 48 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 27180 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Tuesday 11 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-11", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Tuesday 11 April. Caturthī runs from 21:33 on Mon 10 Apr to 23:04 on Tue 11 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-04-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/lakshmi-panchami", "festival": "lakshmi-panchami", "name": "Lakṣmī Pañcamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32636, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-04-11T23:03:41+05:00", "utc": "1978-04-11T18:03:41Z", "ms": 261165821342.38876 }, "end": { "local": "1978-04-13T01:01:39+05:00", "utc": "1978-04-12T20:01:39Z", "ms": 261259298752.51108 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-11T23:03:41+05:00", "utc": "1978-04-11T18:03:41Z", "ms": 261165821342.38876 }, "end": { "local": "1978-04-13T01:01:39+05:00", "utc": "1978-04-12T20:01:39Z", "ms": 261259298752.51108 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-11", "window": { "start": { "local": "1978-04-11T13:11:45+05:00", "utc": "1978-04-11T08:11:45Z", "ms": 261130305193.14258 }, "end": { "local": "1978-04-11T13:59:45+05:00", "utc": "1978-04-11T08:59:45Z", "ms": 261133185193.14258 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-04-12", "window": { "start": { "local": "1978-04-12T13:11:29+05:00", "utc": "1978-04-12T08:11:29Z", "ms": 261216689395.90677 }, "end": { "local": "1978-04-12T13:59:29+05:00", "utc": "1978-04-12T08:59:29Z", "ms": 261219569395.90677 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 23:04 on Tue 11 Apr to 01:02 on Thu 13 Apr.", "fact": "1978-04-11T18:03:41Z → 1978-04-12T20:01:39Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:12–14:00 on the 11th, 13:11–13:59 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 11th and 48 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 32636 s" }, { "step": "ruling", "text": "Lakṣmī Pañcamī, Tehran, 1978: Wednesday 12 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "lakshmi-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Sri pancami or Laksmi pancami (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-12", "confidence": "determinate" } ], "quote": "In Tehran, Lakṣmī Pañcamī 1978 falls on Wednesday 12 April. Pañcamī runs from 23:04 on Tue 11 Apr to 01:02 on Thu 13 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/lakshmi-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vaishakhi", "festival": "vaishakhi", "name": "Vaiśākhī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19633, "anga": { "type": "sankranti", "index": 0, "key": "mesha", "name": "Meṣa", "start": { "local": "1978-04-14T01:36:48+05:00", "utc": "1978-04-13T20:36:48Z", "ms": 261347808165.14066 }, "end": { "local": "1978-05-14T22:31:14+05:00", "utc": "1978-05-14T17:31:14Z", "ms": 264015074108.0624 } }, "span": { "of": "transit", "start": { "local": "1978-04-14T01:36:48+05:00", "utc": "1978-04-13T20:36:48Z", "ms": 261347808165.14066 }, "end": { "local": "1978-04-14T01:36:48+05:00", "utc": "1978-04-13T20:36:48Z", "ms": 261347808165.14066 } }, "kaala": "day", "days": [ { "local_date": "1978-04-13", "window": { "start": { "local": "1978-04-13T07:05:21+05:00", "utc": "1978-04-13T02:05:21Z", "ms": 261281120880.65506 }, "end": { "local": "1978-04-14T07:04:01+05:00", "utc": "1978-04-14T02:04:01Z", "ms": 261367440775.31348 } }, "covered_min": 1, "window_min": 1439, "qualifies": true }, { "local_date": "1978-04-14", "window": { "start": { "local": "1978-04-14T07:04:01+05:00", "utc": "1978-04-14T02:04:01Z", "ms": 261367440775.31348 }, "end": { "local": "1978-04-15T07:02:41+05:00", "utc": "1978-04-15T02:02:41Z", "ms": 261453761259.16476 } }, "covered_min": 0, "window_min": 1439, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Meṣa at 01:37 on Fri 14 Apr.", "fact": "1978-04-13T20:36:48Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 07:05 on the 13th, and from 07:04 on the 14th.", "fact": "day: sunrise-to-sunrise · sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from sunrise. The transit falls on the 13th, not the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunrise → only-day · margin 19633 s" }, { "step": "ruling", "text": "Vaiśākhī, Tehran, 1978: Thursday 13 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "vaishakhi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Mesadi — Cadaka puja (Bengal), Bahag Bihu (Assam), Cheiraoba (Manipur), Visu (T. C. State), Vaisakhi (on the samkramana day commencing from sunrise)." }, { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } ], "not_evaluated": "The other names in the row (Cadaka puja, Bahag Bihu, Cheiraoba, Visu) are regional observances and wait with the regional rows.", "rashi": "Meṣa", "day_from": "sunrise" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-13", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1978-04-14", "statement": "Counted from midnight", "reference": { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } }, { "kind": "reckoning", "id": "sunset-rule", "local_date": "1978-04-14", "statement": "Past sunset, the next day (the Tamil rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } } ], "quote": "In Tehran, Vaiśākhī 1978 falls on Thursday 13 April. The Sun enters Meṣa at 01:37 on Fri 14 Apr, and the rule counts the day from sunrise. Counted from midnight, or by the Tamil rule for the first day of a solar month, which gives a transit after sunset to the next day, it is 14 April.", "cite": "https://ahargana.org/tehran/festivals/1978/vaishakhi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/bhavani-utpatti", "festival": "bhavani-utpatti", "name": "Bhavānī Utpatti", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18382, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-04-15T05:44:02+05:00", "utc": "1978-04-15T00:44:02Z", "ms": 261449041718.08057 }, "end": { "local": "1978-04-16T08:04:08+05:00", "utc": "1978-04-16T03:04:08Z", "ms": 261543847576.10995 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-15T05:44:02+05:00", "utc": "1978-04-15T00:44:02Z", "ms": 261449041718.08057 }, "end": { "local": "1978-04-16T08:04:08+05:00", "utc": "1978-04-16T03:04:08Z", "ms": 261543847576.10995 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-15", "window": { "start": { "local": "1978-04-15T13:10:44+05:00", "utc": "1978-04-15T08:10:44Z", "ms": 261475843761.4471 }, "end": { "local": "1978-04-15T13:58:44+05:00", "utc": "1978-04-15T08:58:44Z", "ms": 261478723761.4471 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-04-16", "window": { "start": { "local": "1978-04-16T13:10:29+05:00", "utc": "1978-04-16T08:10:29Z", "ms": 261562229184.85654 }, "end": { "local": "1978-04-16T13:58:29+05:00", "utc": "1978-04-16T08:58:29Z", "ms": 261565109184.85654 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 05:44 on Sat 15 Apr to 08:04 on Sun 16 Apr.", "fact": "1978-04-15T00:44:02Z → 1978-04-16T03:04:08Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:11–13:59 on the 15th, 13:10–13:58 on the 16th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 15th and 0 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 18382 s" }, { "step": "ruling", "text": "Bhavānī Utpatti, Tehran, 1978: Saturday 15 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bhavani-utpatti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 8 Annapurna puja (Beng.) (paraviddha), Bhavani-utpatti (paraviddha), Asokastami (Special when combined with naks. Punarvasu and Wednesday, after mid-day)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-15", "confidence": "determinate" } ], "quote": "In Tehran, Bhavānī Utpatti 1978 falls on Saturday 15 April. Aṣṭamī runs from 05:44 on Sat 15 Apr to 08:04 on Sun 16 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/bhavani-utpatti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rama-navami", "festival": "rama-navami", "name": "Rāma Navamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11066, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1978-04-16T08:04:08+05:00", "utc": "1978-04-16T03:04:08Z", "ms": 261543847576.10995 }, "end": { "local": "1978-04-17T10:05:49+05:00", "utc": "1978-04-17T05:05:49Z", "ms": 261637549242.33087 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-16T08:04:08+05:00", "utc": "1978-04-16T03:04:08Z", "ms": 261543847576.10995 }, "end": { "local": "1978-04-17T10:05:49+05:00", "utc": "1978-04-17T05:05:49Z", "ms": 261637549242.33087 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-16", "window": { "start": { "local": "1978-04-16T13:10:29+05:00", "utc": "1978-04-16T08:10:29Z", "ms": 261562229184.85654 }, "end": { "local": "1978-04-16T13:58:29+05:00", "utc": "1978-04-16T08:58:29Z", "ms": 261565109184.85654 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-04-17", "window": { "start": { "local": "1978-04-17T13:10:15+05:00", "utc": "1978-04-17T08:10:15Z", "ms": 261648614950.61713 }, "end": { "local": "1978-04-17T13:58:15+05:00", "utc": "1978-04-17T08:58:15Z", "ms": 261651494950.61713 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 08:04 on Sun 16 Apr to 10:06 on Mon 17 Apr.", "fact": "1978-04-16T03:04:08Z → 1978-04-17T05:05:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:10–13:58 on the 16th, 13:10–13:58 on the 17th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 16th and 0 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11066 s" }, { "step": "ruling", "text": "Rāma Navamī, Tehran, 1978: Sunday 16 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rama-navami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 9 Ramanavami (madhyahnavyapini, special with Punarvasu naks.), Rama jayanti." } ], "not_evaluated": "The row calls the day special when it falls with Punarvasu nakṣatra; the nakṣatra is not tested.", "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-16", "confidence": "determinate" } ], "quote": "In Tehran, Rāma Navamī 1978 falls on Sunday 16 April. Navamī runs from 08:04 on Sun 16 Apr to 10:06 on Mon 17 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/rama-navami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-04-19", "festival": "ekadashi", "name": "Kāmadā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16728, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-04-18T11:37:34+05:00", "utc": "1978-04-18T06:37:34Z", "ms": 261729454457.66986 }, "end": { "local": "1978-04-19T12:31:06+05:00", "utc": "1978-04-19T07:31:06Z", "ms": 261819065533.03894 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-18T11:37:34+05:00", "utc": "1978-04-18T06:37:34Z", "ms": 261729454457.66986 }, "end": { "local": "1978-04-19T12:31:06+05:00", "utc": "1978-04-19T07:31:06Z", "ms": 261819065533.03894 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-04-18", "window": { "start": { "local": "1978-04-18T06:58:47+05:00", "utc": "1978-04-18T01:58:47Z", "ms": 261712726534.52686 }, "end": { "local": "1978-04-18T06:58:47+05:00", "utc": "1978-04-18T01:58:47Z", "ms": 261712726534.52686 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-04-19", "window": { "start": { "local": "1978-04-19T06:57:30+05:00", "utc": "1978-04-19T01:57:30Z", "ms": 261799049665.73242 }, "end": { "local": "1978-04-19T06:57:30+05:00", "utc": "1978-04-19T01:57:30Z", "ms": 261799049665.73242 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:38 on Tue 18 Apr to 12:31 on Wed 19 Apr.", "fact": "1978-04-18T06:37:34Z → 1978-04-19T07:31:06Z" }, { "step": "kaala", "text": "Sunrise is at 06:59 on the 18th and 06:57 on the 19th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 18th and is on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 16728 s" }, { "step": "ruling", "text": "Kāmadā Ekādaśī, Tehran, 1978: Wednesday 19 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-19", "confidence": "determinate" } ], "quote": "In Tehran, Kāmadā Ekādaśī 1978 falls on Wednesday 19 April. Ekādaśī runs from 11:38 on Tue 18 Apr to 12:31 on Wed 19 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-04-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ananga-trayodashi", "festival": "ananga-trayodashi", "name": "Anaṅga Trayodaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1652, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-04-20T12:42:02+05:00", "utc": "1978-04-20T07:42:02Z", "ms": 261906122419.6894 }, "end": { "local": "1978-04-21T12:09:59+05:00", "utc": "1978-04-21T07:09:59Z", "ms": 261990599459.31888 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-20T12:42:02+05:00", "utc": "1978-04-20T07:42:02Z", "ms": 261906122419.6894 }, "end": { "local": "1978-04-21T12:09:59+05:00", "utc": "1978-04-21T07:09:59Z", "ms": 261990599459.31888 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-20", "window": { "start": { "local": "1978-04-20T13:09:34+05:00", "utc": "1978-04-20T08:09:34Z", "ms": 261907774454.88403 }, "end": { "local": "1978-04-20T13:57:34+05:00", "utc": "1978-04-20T08:57:34Z", "ms": 261910654454.88403 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-04-21", "window": { "start": { "local": "1978-04-21T13:09:22+05:00", "utc": "1978-04-21T08:09:22Z", "ms": 261994161744.3166 }, "end": { "local": "1978-04-21T13:57:22+05:00", "utc": "1978-04-21T08:57:22Z", "ms": 261997041744.3166 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 12:42 on Thu 20 Apr to 12:10 on Fri 21 Apr.", "fact": "1978-04-20T07:42:02Z → 1978-04-21T07:09:59Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:10–13:58 on the 20th, 13:09–13:57 on the 21st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 20th and 0 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 1652 s" }, { "step": "ruling", "text": "Anaṅga Trayodaśī, Tehran, 1978: Thursday 20 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ananga-trayodashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 13 Ananga trayodasi (purvaviddha), Mahavira jayanti (Jain)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-20", "confidence": "boundary" } ], "quote": "In Tehran, Anaṅga Trayodaśī 1978 falls on Thursday 20 April. Trayodaśī runs from 12:42 on Thu 20 Apr to 12:10 on Fri 21 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/ananga-trayodashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-04-20", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26933, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-04-20T12:42:02+05:00", "utc": "1978-04-20T07:42:02Z", "ms": 261906122419.6894 }, "end": { "local": "1978-04-21T12:09:59+05:00", "utc": "1978-04-21T07:09:59Z", "ms": 261990599459.31888 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-20T12:42:02+05:00", "utc": "1978-04-20T07:42:02Z", "ms": 261906122419.6894 }, "end": { "local": "1978-04-21T12:09:59+05:00", "utc": "1978-04-21T07:09:59Z", "ms": 261990599459.31888 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-04-20", "window": { "start": { "local": "1978-04-20T20:10:55+05:00", "utc": "1978-04-20T15:10:55Z", "ms": 261933055376.3224 }, "end": { "local": "1978-04-20T21:36:48+05:00", "utc": "1978-04-20T16:36:48Z", "ms": 261938207748.60333 } }, "covered_min": 86, "window_min": 86, "qualifies": true }, { "local_date": "1978-04-21", "window": { "start": { "local": "1978-04-21T20:11:45+05:00", "utc": "1978-04-21T15:11:45Z", "ms": 262019505320.20377 }, "end": { "local": "1978-04-21T21:37:21+05:00", "utc": "1978-04-21T16:37:21Z", "ms": 262024641091.09595 } }, "covered_min": 0, "window_min": 86, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 12:42 on Thu 20 Apr to 12:10 on Fri 21 Apr.", "fact": "1978-04-20T07:42:02Z → 1978-04-21T07:09:59Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:11–21:37 on the 20th, 20:12–21:37 on the 21st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 86 of 86 minutes on the 20th and 0 of 86 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 26933 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Thursday 20 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-20", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Thursday 20 April. Trayodaśī runs from 12:42 on Thu 20 Apr to 12:10 on Fri 21 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-04-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vishnu-damanaka-chaturdashi", "festival": "vishnu-damanaka-chaturdashi", "name": "Viṣṇudamanaka Caturdaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3562, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-04-21T12:09:59+05:00", "utc": "1978-04-21T07:09:59Z", "ms": 261990599459.31888 }, "end": { "local": "1978-04-22T10:57:50+05:00", "utc": "1978-04-22T05:57:50Z", "ms": 262072669999.65695 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-21T12:09:59+05:00", "utc": "1978-04-21T07:09:59Z", "ms": 261990599459.31888 }, "end": { "local": "1978-04-22T10:57:50+05:00", "utc": "1978-04-22T05:57:50Z", "ms": 262072669999.65695 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-21", "window": { "start": { "local": "1978-04-21T13:09:22+05:00", "utc": "1978-04-21T08:09:22Z", "ms": 261994161744.3166 }, "end": { "local": "1978-04-21T13:57:22+05:00", "utc": "1978-04-21T08:57:22Z", "ms": 261997041744.3166 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-04-22", "window": { "start": { "local": "1978-04-22T13:09:09+05:00", "utc": "1978-04-22T08:09:09Z", "ms": 262080549454.74954 }, "end": { "local": "1978-04-22T13:57:09+05:00", "utc": "1978-04-22T08:57:09Z", "ms": 262083429454.74954 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 12:10 on Fri 21 Apr to 10:58 on Sat 22 Apr.", "fact": "1978-04-21T07:09:59Z → 1978-04-22T05:57:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:09–13:57 on the 21st, 13:09–13:57 on the 22nd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 21st and 0 of 48 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 3562 s" }, { "step": "ruling", "text": "Viṣṇudamanaka Caturdaśī, Tehran, 1978: Friday 21 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vishnu-damanaka-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 14 Madanabhanji, (Bengal & Orissa) (paraviddha), Sivadamanaka caturdasi, Visnudamanaka caturdasi (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-21", "confidence": "boundary" } ], "quote": "In Tehran, Viṣṇudamanaka Caturdaśī 1978 falls on Friday 21 April. Caturdaśī runs from 12:10 on Fri 21 Apr to 10:58 on Sat 22 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vishnu-damanaka-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/chaitri-purnima", "festival": "chaitri-purnima", "name": "Caitrī Pūrṇimā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7879, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-04-22T10:57:50+05:00", "utc": "1978-04-22T05:57:50Z", "ms": 262072669999.65695 }, "end": { "local": "1978-04-23T09:10:57+05:00", "utc": "1978-04-23T04:10:57Z", "ms": 262152656629.43237 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1978-04-22T10:57:50+05:00", "utc": "1978-04-22T05:57:50Z", "ms": 262072669999.65695 }, "end": { "local": "1978-04-23T09:10:57+05:00", "utc": "1978-04-23T04:10:57Z", "ms": 262152656629.43237 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-04-22", "window": { "start": { "local": "1978-04-22T13:09:09+05:00", "utc": "1978-04-22T08:09:09Z", "ms": 262080549454.74954 }, "end": { "local": "1978-04-22T13:57:09+05:00", "utc": "1978-04-22T08:57:09Z", "ms": 262083429454.74954 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-04-23", "window": { "start": { "local": "1978-04-23T13:08:58+05:00", "utc": "1978-04-23T08:08:58Z", "ms": 262166937602.7495 }, "end": { "local": "1978-04-23T13:56:58+05:00", "utc": "1978-04-23T08:56:58Z", "ms": 262169817602.7495 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 10:58 on Sat 22 Apr to 09:11 on Sun 23 Apr.", "fact": "1978-04-22T05:57:50Z → 1978-04-23T04:10:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:09–13:57 on the 22nd, 13:09–13:57 on the 23rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 22nd and 0 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 7879 s" }, { "step": "ruling", "text": "Caitrī Pūrṇimā, Tehran, 1978: Saturday 22 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "chaitri-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Caitri purnima (paraviddha), Hanumat jayanti, Oli ending (Jain)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-22", "confidence": "determinate" } ], "quote": "In Tehran, Caitrī Pūrṇimā 1978 falls on Saturday 22 April. Pūrṇimā runs from 10:58 on Sat 22 Apr to 09:11 on Sun 23 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/chaitri-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-04-25", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-04-25", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 3942, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-04-26T01:35:58+05:00", "utc": "1978-04-25T20:35:58Z", "ms": 262384558250.4269 }, "end": { "local": "1978-04-26T22:46:25+05:00", "utc": "1978-04-26T17:46:25Z", "ms": 262460784526.17896 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-04-26T01:35:58+05:00", "utc": "1978-04-25T20:35:58Z", "ms": 262384558250.4269 }, "end": { "local": "1978-04-26T22:46:25+05:00", "utc": "1978-04-26T17:46:25Z", "ms": 262460784526.17896 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-04-25", "window": { "start": { "local": "1978-04-25T22:49:30+05:00", "utc": "1978-04-25T17:49:30Z", "ms": 262374569650.39044 }, "end": { "local": "1978-04-25T22:49:30+05:00", "utc": "1978-04-25T17:49:30Z", "ms": 262374569650.39044 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-04-26", "window": { "start": { "local": "1978-04-26T23:52:06+05:00", "utc": "1978-04-26T18:52:06Z", "ms": 262464726186.9808 }, "end": { "local": "1978-04-26T23:52:06+05:00", "utc": "1978-04-26T18:52:06Z", "ms": 262464726186.9808 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 01:36 on Wed 26 Apr to 22:46 on Wed 26 Apr.", "fact": "1978-04-25T20:35:58Z → 1978-04-26T17:46:25Z" }, { "step": "kaala", "text": "Moonrise is at 22:49 on the 25th and 23:52 on the 26th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 25th and is not on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither moonrise qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 3942 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Tuesday 25 April.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-04-25", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-04-25", "confidence": "boundary" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Tuesday 25 April. Caturthī runs from 01:36 on Wed 26 Apr to 22:46 on Wed 26 Apr, and is current at moonrise on neither day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-04-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-05-03", "festival": "ekadashi", "name": "Varūthinī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9351, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-05-02T10:09:13+05:00", "utc": "1978-05-02T05:09:13Z", "ms": 262933753203.3101 }, "end": { "local": "1978-05-03T09:16:56+05:00", "utc": "1978-05-03T04:16:56Z", "ms": 263017016167.50717 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-02T10:09:13+05:00", "utc": "1978-05-02T05:09:13Z", "ms": 262933753203.3101 }, "end": { "local": "1978-05-03T09:16:56+05:00", "utc": "1978-05-03T04:16:56Z", "ms": 263017016167.50717 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-05-02", "window": { "start": { "local": "1978-05-02T06:42:09+05:00", "utc": "1978-05-02T01:42:09Z", "ms": 262921328815.5869 }, "end": { "local": "1978-05-02T06:42:09+05:00", "utc": "1978-05-02T01:42:09Z", "ms": 262921328815.5869 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-05-03", "window": { "start": { "local": "1978-05-03T06:41:05+05:00", "utc": "1978-05-03T01:41:05Z", "ms": 263007665091.09384 }, "end": { "local": "1978-05-03T06:41:05+05:00", "utc": "1978-05-03T01:41:05Z", "ms": 263007665091.09384 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:09 on Tue 2 May to 09:17 on Wed 3 May.", "fact": "1978-05-02T05:09:13Z → 1978-05-03T04:16:56Z" }, { "step": "kaala", "text": "Sunrise is at 06:42 on the 2nd and 06:41 on the 3rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 2nd and is on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 9351 s" }, { "step": "ruling", "text": "Varūthinī Ekādaśī, Tehran, 1978: Wednesday 3 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-03", "confidence": "determinate" } ], "quote": "In Tehran, Varūthinī Ekādaśī 1978 falls on Wednesday 3 May. Ekādaśī runs from 10:09 on Tue 2 May to 09:17 on Wed 3 May and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-05-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-05-04", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 39526, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-05-04T08:48:22+05:00", "utc": "1978-05-04T03:48:22Z", "ms": 263101701922.25687 }, "end": { "local": "1978-05-05T08:43:35+05:00", "utc": "1978-05-05T03:43:35Z", "ms": 263187814696.69888 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-04T08:48:22+05:00", "utc": "1978-05-04T03:48:22Z", "ms": 263101701922.25687 }, "end": { "local": "1978-05-05T08:43:35+05:00", "utc": "1978-05-05T03:43:35Z", "ms": 263187814696.69888 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-05-03", "window": { "start": { "local": "1978-05-03T20:21:48+05:00", "utc": "1978-05-03T15:21:48Z", "ms": 263056907593.49802 }, "end": { "local": "1978-05-03T21:44:14+05:00", "utc": "1978-05-03T16:44:14Z", "ms": 263061853583.9602 } }, "covered_min": 0, "window_min": 82, "qualifies": false }, { "local_date": "1978-05-04", "window": { "start": { "local": "1978-05-04T20:22:38+05:00", "utc": "1978-05-04T15:22:38Z", "ms": 263143357812.9335 }, "end": { "local": "1978-05-04T21:44:49+05:00", "utc": "1978-05-04T16:44:49Z", "ms": 263148288922.15848 } }, "covered_min": 82, "window_min": 82, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 08:48 on Thu 4 May to 08:44 on Fri 5 May.", "fact": "1978-05-04T03:48:22Z → 1978-05-05T03:43:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:22–21:44 on the 3rd, 20:23–21:45 on the 4th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 82 minutes on the 3rd and 82 of 82 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 39526 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Thursday 4 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-04", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Thursday 4 May. Trayodaśī runs from 08:48 on Thu 4 May to 08:44 on Fri 5 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-05-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-05-05", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24525, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-05-05T08:43:35+05:00", "utc": "1978-05-05T03:43:35Z", "ms": 263187814696.69888 }, "end": { "local": "1978-05-06T09:02:52+05:00", "utc": "1978-05-06T04:02:52Z", "ms": 263275371699.20697 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-05T08:43:35+05:00", "utc": "1978-05-05T03:43:35Z", "ms": 263187814696.69888 }, "end": { "local": "1978-05-06T09:02:52+05:00", "utc": "1978-05-06T04:02:52Z", "ms": 263275371699.20697 } }, "kaala": "nishita", "days": [ { "local_date": "1978-05-04", "window": { "start": { "local": "1978-05-05T01:06:49+05:00", "utc": "1978-05-04T20:06:49Z", "ms": 263160409472.5272 }, "end": { "local": "1978-05-05T01:54:49+05:00", "utc": "1978-05-04T20:54:49Z", "ms": 263163289472.5272 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-05-05", "window": { "start": { "local": "1978-05-06T01:06:44+05:00", "utc": "1978-05-05T20:06:44Z", "ms": 263246804456.70776 }, "end": { "local": "1978-05-06T01:54:44+05:00", "utc": "1978-05-05T20:54:44Z", "ms": 263249684456.70776 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 08:44 on Fri 5 May to 09:03 on Sat 6 May.", "fact": "1978-05-05T03:43:35Z → 1978-05-06T04:02:52Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 01:07–01:55 on the 4th, 01:07–01:55 on the 5th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 4th and 48 of 48 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 24525 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Friday 5 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-05", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Friday 5 May. Caturdaśī runs from 08:44 on Fri 5 May to 09:03 on Sat 6 May and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-05-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/parashurama-jayanti", "festival": "parashurama-jayanti", "name": "Paraśurāma Jayantī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21796, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-05-09T12:28:38+05:00", "utc": "1978-05-09T07:28:38Z", "ms": 263546918130.6993 }, "end": { "local": "1978-05-10T14:24:21+05:00", "utc": "1978-05-10T09:24:21Z", "ms": 263640260698.20184 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-09T12:28:38+05:00", "utc": "1978-05-09T07:28:38Z", "ms": 263546918130.6993 }, "end": { "local": "1978-05-10T14:24:21+05:00", "utc": "1978-05-10T09:24:21Z", "ms": 263640260698.20184 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-05-09", "window": { "start": { "local": "1978-05-09T20:26:48+05:00", "utc": "1978-05-09T15:26:48Z", "ms": 263575607512.67645 }, "end": { "local": "1978-05-09T21:47:47+05:00", "utc": "1978-05-09T16:47:47Z", "ms": 263580466867.2299 } }, "covered_min": 81, "window_min": 81, "qualifies": true }, { "local_date": "1978-05-10", "window": { "start": { "local": "1978-05-10T20:27:37+05:00", "utc": "1978-05-10T15:27:37Z", "ms": 263662057010.2184 }, "end": { "local": "1978-05-10T21:48:23+05:00", "utc": "1978-05-10T16:48:23Z", "ms": 263666902586.77374 } }, "covered_min": 0, "window_min": 81, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 12:29 on Tue 9 May to 14:24 on Wed 10 May.", "fact": "1978-05-09T07:28:38Z → 1978-05-10T09:24:21Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:27–21:48 on the 9th, 20:28–21:48 on the 10th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pradoṣa. It covers 81 of 81 minutes on the 9th and 0 of 81 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 21796 s" }, { "step": "ruling", "text": "Paraśurāma Jayantī, Tehran, 1978: Tuesday 9 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "parashurama-jayanti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Aksaya trtiya (purvahna vyapini, paraviddha) (Special when combined with Rohini naksatra and Wednesday), Candanayatra, Parasurama jayanti (pradosavyapini — if occurs on two successive days, the second day is to be observed)." } ], "kaala": "pradosha", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-09", "confidence": "determinate" } ], "quote": "In Tehran, Paraśurāma Jayantī 1978 falls on Tuesday 9 May. Tṛtīyā runs from 12:29 on Tue 9 May to 14:24 on Wed 10 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/parashurama-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/akshaya-tritiya", "festival": "akshaya-tritiya", "name": "Akṣaya Tṛtīyā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4577, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-05-09T12:28:38+05:00", "utc": "1978-05-09T07:28:38Z", "ms": 263546918130.6993 }, "end": { "local": "1978-05-10T14:24:21+05:00", "utc": "1978-05-10T09:24:21Z", "ms": 263640260698.20184 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-09T12:28:38+05:00", "utc": "1978-05-09T07:28:38Z", "ms": 263546918130.6993 }, "end": { "local": "1978-05-10T14:24:21+05:00", "utc": "1978-05-10T09:24:21Z", "ms": 263640260698.20184 } }, "kaala": "purvahna", "days": [ { "local_date": "1978-05-09", "window": { "start": { "local": "1978-05-09T06:35:08+05:00", "utc": "1978-05-09T01:35:08Z", "ms": 263525707824.25986 }, "end": { "local": "1978-05-09T11:12:21+05:00", "utc": "1978-05-09T06:12:21Z", "ms": 263542341053.73206 } }, "covered_min": 0, "window_min": 277, "qualifies": false }, { "local_date": "1978-05-10", "window": { "start": { "local": "1978-05-10T06:34:13+05:00", "utc": "1978-05-10T01:34:13Z", "ms": 263612052671.82715 }, "end": { "local": "1978-05-10T11:12:01+05:00", "utc": "1978-05-10T06:12:01Z", "ms": 263628720784.62424 } }, "covered_min": 278, "window_min": 278, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 12:29 on Tue 9 May to 14:24 on Wed 10 May.", "fact": "1978-05-09T07:28:38Z → 1978-05-10T09:24:21Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:35–11:12 on the 9th, 06:34–11:12 on the 10th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pūrvāhṇa. It covers 0 of 277 minutes on the 9th and 278 of 278 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one forenoon qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 4577 s" }, { "step": "ruling", "text": "Akṣaya Tṛtīyā, Tehran, 1978: Wednesday 10 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "akshaya-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Aksaya trtiya (purvahna vyapini, paraviddha) (Special when combined with Rohini naksatra and Wednesday), Candanayatra, Parasurama jayanti (pradosavyapini — if occurs on two successive days, the second day is to be observed)." } ], "not_evaluated": "The row calls the day special with Rohiṇī nakṣatra and a Wednesday; neither is tested.", "kaala": "purvahna", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-10", "confidence": "determinate" } ], "quote": "In Tehran, Akṣaya Tṛtīyā 1978 falls on Wednesday 10 May. Tṛtīyā runs from 12:29 on Tue 9 May to 14:24 on Wed 10 May and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/tehran/festivals/1978/akshaya-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-05-11", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1766, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-05-10T14:24:21+05:00", "utc": "1978-05-10T09:24:21Z", "ms": 263640260698.20184 }, "end": { "local": "1978-05-11T16:38:10+05:00", "utc": "1978-05-11T11:38:10Z", "ms": 263734690299.98676 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-10T14:24:21+05:00", "utc": "1978-05-10T09:24:21Z", "ms": 263640260698.20184 }, "end": { "local": "1978-05-11T16:38:10+05:00", "utc": "1978-05-11T11:38:10Z", "ms": 263734690299.98676 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-05-10", "window": { "start": { "local": "1978-05-10T13:06:55+05:00", "utc": "1978-05-10T08:06:55Z", "ms": 263635614841.02277 }, "end": { "local": "1978-05-10T13:54:55+05:00", "utc": "1978-05-10T08:54:55Z", "ms": 263638494841.02277 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-05-11", "window": { "start": { "local": "1978-05-11T13:06:53+05:00", "utc": "1978-05-11T08:06:53Z", "ms": 263722012567.7716 }, "end": { "local": "1978-05-11T13:54:53+05:00", "utc": "1978-05-11T08:54:53Z", "ms": 263724892567.7716 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 14:24 on Wed 10 May to 16:38 on Thu 11 May.", "fact": "1978-05-10T09:24:21Z → 1978-05-11T11:38:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:07–13:55 on the 10th, 13:07–13:55 on the 11th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 10th and 48 of 48 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1766 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Thursday 11 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-11", "confidence": "boundary" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Thursday 11 May. Caturthī runs from 14:24 on Wed 10 May to 16:38 on Thu 11 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-05-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shankara-jayanti", "festival": "shankara-jayanti", "name": "Śaṅkara Jayantī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9798, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-05-11T16:38:10+05:00", "utc": "1978-05-11T11:38:10Z", "ms": 263734690299.98676 }, "end": { "local": "1978-05-12T19:02:47+05:00", "utc": "1978-05-12T14:02:47Z", "ms": 263829766938.5325 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-11T16:38:10+05:00", "utc": "1978-05-11T11:38:10Z", "ms": 263734690299.98676 }, "end": { "local": "1978-05-12T19:02:47+05:00", "utc": "1978-05-12T14:02:47Z", "ms": 263829766938.5325 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-05-11", "window": { "start": { "local": "1978-05-11T13:06:53+05:00", "utc": "1978-05-11T08:06:53Z", "ms": 263722012567.7716 }, "end": { "local": "1978-05-11T13:54:53+05:00", "utc": "1978-05-11T08:54:53Z", "ms": 263724892567.7716 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-05-12", "window": { "start": { "local": "1978-05-12T13:06:51+05:00", "utc": "1978-05-12T08:06:51Z", "ms": 263808410846.60736 }, "end": { "local": "1978-05-12T13:54:51+05:00", "utc": "1978-05-12T08:54:51Z", "ms": 263811290846.60736 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 16:38 on Thu 11 May to 19:03 on Fri 12 May.", "fact": "1978-05-11T11:38:10Z → 1978-05-12T14:02:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:07–13:55 on the 11th, 13:07–13:55 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 11th and 48 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9798 s" }, { "step": "ruling", "text": "Śaṅkara Jayantī, Tehran, 1978: Friday 12 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shankara-jayanti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Sankara jayanti." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-12", "confidence": "determinate" } ], "quote": "In Tehran, Śaṅkara Jayantī 1978 falls on Friday 12 May. Pañcamī runs from 16:38 on Thu 11 May to 19:03 on Fri 12 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/shankara-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/gangotpatti", "festival": "gangotpatti", "name": "Gaṅgotpatti", "everyday": "Ganga Saptami", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27186, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1978-05-13T21:27:55+05:00", "utc": "1978-05-13T16:27:55Z", "ms": 263924875408.51767 }, "end": { "local": "1978-05-14T23:41:15+05:00", "utc": "1978-05-14T18:41:15Z", "ms": 264019275440.61652 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-13T21:27:55+05:00", "utc": "1978-05-13T16:27:55Z", "ms": 263924875408.51767 }, "end": { "local": "1978-05-14T23:41:15+05:00", "utc": "1978-05-14T18:41:15Z", "ms": 264019275440.61652 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-05-13", "window": { "start": { "local": "1978-05-13T13:06:50+05:00", "utc": "1978-05-13T08:06:50Z", "ms": 263894809675.11713 }, "end": { "local": "1978-05-13T13:54:50+05:00", "utc": "1978-05-13T08:54:50Z", "ms": 263897689675.11713 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-05-14", "window": { "start": { "local": "1978-05-14T13:06:49+05:00", "utc": "1978-05-14T08:06:49Z", "ms": 263981209050.5869 }, "end": { "local": "1978-05-14T13:54:49+05:00", "utc": "1978-05-14T08:54:49Z", "ms": 263984089050.5869 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 21:28 on Sat 13 May to 23:41 on Sun 14 May.", "fact": "1978-05-13T16:27:55Z → 1978-05-14T18:41:15Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:07–13:55 on the 13th, 13:07–13:55 on the 14th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 13th and 48 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 27186 s" }, { "step": "ruling", "text": "Gaṅgotpatti, Tehran, 1978: Sunday 14 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "gangotpatti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Gangotpatti, (madhyahna vyapini, if occurs on two successive days, the first day is to be observed), Jahnu saptami, Sarkara saptami." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-14", "confidence": "determinate" } ], "quote": "In Tehran, Gaṅgotpatti (Ganga Saptami) 1978 falls on Sunday 14 May. Saptamī runs from 21:28 on Sat 13 May to 23:41 on Sun 14 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/gangotpatti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-05-18", "festival": "ekadashi", "name": "Mohinī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11810, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-05-18T03:10:50+05:00", "utc": "1978-05-17T22:10:50Z", "ms": 264291050208.37555 }, "end": { "local": "1978-05-19T02:50:34+05:00", "utc": "1978-05-18T21:50:34Z", "ms": 264376233970.2329 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-18T03:10:50+05:00", "utc": "1978-05-17T22:10:50Z", "ms": 264291050208.37555 }, "end": { "local": "1978-05-19T02:50:34+05:00", "utc": "1978-05-18T21:50:34Z", "ms": 264376233970.2329 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-05-18", "window": { "start": { "local": "1978-05-18T06:27:41+05:00", "utc": "1978-05-18T01:27:41Z", "ms": 264302860622.1239 }, "end": { "local": "1978-05-18T06:27:41+05:00", "utc": "1978-05-18T01:27:41Z", "ms": 264302860622.1239 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-05-19", "window": { "start": { "local": "1978-05-19T06:26:58+05:00", "utc": "1978-05-19T01:26:58Z", "ms": 264389218086.39377 }, "end": { "local": "1978-05-19T06:26:58+05:00", "utc": "1978-05-19T01:26:58Z", "ms": 264389218086.39377 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:11 on Thu 18 May to 02:51 on Fri 19 May.", "fact": "1978-05-17T22:10:50Z → 1978-05-18T21:50:34Z" }, { "step": "kaala", "text": "Sunrise is at 06:28 on the 18th and 06:27 on the 19th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 18th and is not on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 11810 s" }, { "step": "ruling", "text": "Mohinī Ekādaśī, Tehran, 1978: Thursday 18 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-18", "confidence": "determinate" } ], "quote": "In Tehran, Mohinī Ekādaśī 1978 falls on Thursday 18 May. Ekādaśī runs from 03:11 on Thu 18 May to 02:51 on Fri 19 May and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-05-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/parashurama-dvadashi", "festival": "parashurama-dvadashi", "name": "Paraśurāma Dvādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36980, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-05-19T02:50:34+05:00", "utc": "1978-05-18T21:50:34Z", "ms": 264376233970.2329 }, "end": { "local": "1978-05-20T01:41:50+05:00", "utc": "1978-05-19T20:41:50Z", "ms": 264458509901.05048 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-19T02:50:34+05:00", "utc": "1978-05-18T21:50:34Z", "ms": 264376233970.2329 }, "end": { "local": "1978-05-20T01:41:50+05:00", "utc": "1978-05-19T20:41:50Z", "ms": 264458509901.05048 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-05-19", "window": { "start": { "local": "1978-05-19T13:06:54+05:00", "utc": "1978-05-19T08:06:54Z", "ms": 264413214020.89368 }, "end": { "local": "1978-05-19T13:54:54+05:00", "utc": "1978-05-19T08:54:54Z", "ms": 264416094020.89368 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-05-20", "window": { "start": { "local": "1978-05-20T13:06:57+05:00", "utc": "1978-05-20T08:06:57Z", "ms": 264499616610.1159 }, "end": { "local": "1978-05-20T13:54:57+05:00", "utc": "1978-05-20T08:54:57Z", "ms": 264502496610.1159 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 02:51 on Fri 19 May to 01:42 on Sat 20 May.", "fact": "1978-05-18T21:50:34Z → 1978-05-19T20:41:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:07–13:55 on the 19th, 13:07–13:55 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 19th and 0 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 36980 s" }, { "step": "ruling", "text": "Paraśurāma Dvādaśī, Tehran, 1978: Friday 19 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "parashurama-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Parasurama dvadasi (purvaviddha), Rukmini dvadasi (purvaviddha)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-19", "confidence": "determinate" } ], "quote": "In Tehran, Paraśurāma Dvādaśī 1978 falls on Friday 19 May. Dvādaśī runs from 02:51 on Fri 19 May to 01:42 on Sat 20 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/parashurama-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rukmini-dvadashi", "festival": "rukmini-dvadashi", "name": "Rukmiṇī Dvādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36980, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-05-19T02:50:34+05:00", "utc": "1978-05-18T21:50:34Z", "ms": 264376233970.2329 }, "end": { "local": "1978-05-20T01:41:50+05:00", "utc": "1978-05-19T20:41:50Z", "ms": 264458509901.05048 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-19T02:50:34+05:00", "utc": "1978-05-18T21:50:34Z", "ms": 264376233970.2329 }, "end": { "local": "1978-05-20T01:41:50+05:00", "utc": "1978-05-19T20:41:50Z", "ms": 264458509901.05048 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-05-19", "window": { "start": { "local": "1978-05-19T13:06:54+05:00", "utc": "1978-05-19T08:06:54Z", "ms": 264413214020.89368 }, "end": { "local": "1978-05-19T13:54:54+05:00", "utc": "1978-05-19T08:54:54Z", "ms": 264416094020.89368 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-05-20", "window": { "start": { "local": "1978-05-20T13:06:57+05:00", "utc": "1978-05-20T08:06:57Z", "ms": 264499616610.1159 }, "end": { "local": "1978-05-20T13:54:57+05:00", "utc": "1978-05-20T08:54:57Z", "ms": 264502496610.1159 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 02:51 on Fri 19 May to 01:42 on Sat 20 May.", "fact": "1978-05-18T21:50:34Z → 1978-05-19T20:41:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:07–13:55 on the 19th, 13:07–13:55 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 19th and 0 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 36980 s" }, { "step": "ruling", "text": "Rukmiṇī Dvādaśī, Tehran, 1978: Friday 19 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rukmini-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Parasurama dvadasi (purvaviddha), Rukmini dvadasi (purvaviddha)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-19", "confidence": "determinate" } ], "quote": "In Tehran, Rukmiṇī Dvādaśī 1978 falls on Friday 19 May. Dvādaśī runs from 02:51 on Fri 19 May to 01:42 on Sat 20 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/rukmini-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-05-20", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6851, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-05-20T01:41:50+05:00", "utc": "1978-05-19T20:41:50Z", "ms": 264458509901.05048 }, "end": { "local": "1978-05-20T23:48:28+05:00", "utc": "1978-05-20T18:48:28Z", "ms": 264538107579.89896 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-20T01:41:50+05:00", "utc": "1978-05-19T20:41:50Z", "ms": 264458509901.05048 }, "end": { "local": "1978-05-20T23:48:28+05:00", "utc": "1978-05-20T18:48:28Z", "ms": 264538107579.89896 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-05-19", "window": { "start": { "local": "1978-05-19T20:34:50+05:00", "utc": "1978-05-19T15:34:50Z", "ms": 264440089955.39362 }, "end": { "local": "1978-05-19T21:53:42+05:00", "utc": "1978-05-19T16:53:42Z", "ms": 264444821569.25623 } }, "covered_min": 0, "window_min": 79, "qualifies": false }, { "local_date": "1978-05-20", "window": { "start": { "local": "1978-05-20T20:35:36+05:00", "utc": "1978-05-20T15:35:36Z", "ms": 264526536160.8687 }, "end": { "local": "1978-05-20T21:54:16+05:00", "utc": "1978-05-20T16:54:16Z", "ms": 264531256347.67905 } }, "covered_min": 79, "window_min": 79, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:42 on Sat 20 May to 23:48 on Sat 20 May.", "fact": "1978-05-19T20:41:50Z → 1978-05-20T18:48:28Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:35–21:54 on the 19th, 20:36–21:54 on the 20th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 79 minutes on the 19th and 79 of 79 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 6851 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Saturday 20 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-20", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Saturday 20 May. Trayodaśī runs from 01:42 on Sat 20 May to 23:48 on Sat 20 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-05-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/nrisimha-chaturdashi", "festival": "nrisimha-chaturdashi", "name": "Nṛsiṃha Caturdaśī", "everyday": "Narasimha Jayanti", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2260, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-05-20T23:48:28+05:00", "utc": "1978-05-20T18:48:28Z", "ms": 264538107579.89896 }, "end": { "local": "1978-05-21T21:17:10+05:00", "utc": "1978-05-21T16:17:10Z", "ms": 264615430473.84888 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-20T23:48:28+05:00", "utc": "1978-05-20T18:48:28Z", "ms": 264538107579.89896 }, "end": { "local": "1978-05-21T21:17:10+05:00", "utc": "1978-05-21T16:17:10Z", "ms": 264615430473.84888 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-05-20", "window": { "start": { "local": "1978-05-20T20:35:36+05:00", "utc": "1978-05-20T15:35:36Z", "ms": 264526536160.8687 }, "end": { "local": "1978-05-20T21:54:16+05:00", "utc": "1978-05-20T16:54:16Z", "ms": 264531256347.67905 } }, "covered_min": 0, "window_min": 79, "qualifies": false }, { "local_date": "1978-05-21", "window": { "start": { "local": "1978-05-21T20:36:22+05:00", "utc": "1978-05-21T15:36:22Z", "ms": 264612981885.47308 }, "end": { "local": "1978-05-21T21:54:51+05:00", "utc": "1978-05-21T16:54:51Z", "ms": 264617690916.06268 } }, "covered_min": 41, "window_min": 78, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:48 on Sat 20 May to 21:17 on Sun 21 May.", "fact": "1978-05-20T18:48:28Z → 1978-05-21T16:17:10Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:36–21:54 on the 20th, 20:36–21:55 on the 21st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 0 of 79 minutes on the 20th and 41 of 78 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 2260 s" }, { "step": "ruling", "text": "Nṛsiṃha Caturdaśī, Tehran, 1978: Sunday 21 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "nrisimha-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 14 Nrsimha caturdasi (pradosa vyapini — if it occurs on two successive days, the second day is to be observed, special when combined with naksatra 'Svati', yoga 'Siddhi' and 'Saturday')." } ], "not_evaluated": "The row calls the day special with Svātī nakṣatra, Siddhi yoga and a Saturday; none is tested.", "kaala": "pradosha", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-21", "confidence": "determinate" } ], "quote": "In Tehran, Nṛsiṃha Caturdaśī (Narasimha Jayanti) 1978 falls on Sunday 21 May. Caturdaśī runs from 23:48 on Sat 20 May to 21:17 on Sun 21 May and covers 41 of 78 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/nrisimha-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/buddha-purnima", "festival": "buddha-purnima", "name": "Buddha Pūrṇimā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15698, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-05-21T21:17:10+05:00", "utc": "1978-05-21T16:17:10Z", "ms": 264615430473.84888 }, "end": { "local": "1978-05-22T18:16:41+05:00", "utc": "1978-05-22T13:16:41Z", "ms": 264691000890.1144 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-21T21:17:10+05:00", "utc": "1978-05-21T16:17:10Z", "ms": 264615430473.84888 }, "end": { "local": "1978-05-22T18:16:41+05:00", "utc": "1978-05-22T13:16:41Z", "ms": 264691000890.1144 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-05-21", "window": { "start": { "local": "1978-05-21T13:07:00+05:00", "utc": "1978-05-21T08:07:00Z", "ms": 264586019723.7096 }, "end": { "local": "1978-05-21T13:55:00+05:00", "utc": "1978-05-21T08:55:00Z", "ms": 264588899723.7096 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-05-22", "window": { "start": { "local": "1978-05-22T13:07:03+05:00", "utc": "1978-05-22T08:07:03Z", "ms": 264672423358.77124 }, "end": { "local": "1978-05-22T13:55:03+05:00", "utc": "1978-05-22T08:55:03Z", "ms": 264675303358.77124 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 21:17 on Sun 21 May to 18:17 on Mon 22 May.", "fact": "1978-05-21T16:17:10Z → 1978-05-22T13:16:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:07–13:55 on the 21st, 13:07–13:55 on the 22nd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 21st and 48 of 48 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15698 s" }, { "step": "ruling", "text": "Buddha Pūrṇimā, Tehran, 1978: Monday 22 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "buddha-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Sampat gauri vrata (paraviddha), Phuladola (Bengal & Orissa) (paraviddha), Gandhesvari puja (Bengal) (purvaviddha), Buddha purnima, Vaisakhi purnima." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-22", "confidence": "determinate" } ], "quote": "In Tehran, Buddha Pūrṇimā 1978 falls on Monday 22 May. Pūrṇimā runs from 21:17 on Sun 21 May to 18:17 on Mon 22 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/buddha-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sampat-gauri-vrata", "festival": "sampat-gauri-vrata", "name": "Sampat Gaurī Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15698, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-05-21T21:17:10+05:00", "utc": "1978-05-21T16:17:10Z", "ms": 264615430473.84888 }, "end": { "local": "1978-05-22T18:16:41+05:00", "utc": "1978-05-22T13:16:41Z", "ms": 264691000890.1144 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-21T21:17:10+05:00", "utc": "1978-05-21T16:17:10Z", "ms": 264615430473.84888 }, "end": { "local": "1978-05-22T18:16:41+05:00", "utc": "1978-05-22T13:16:41Z", "ms": 264691000890.1144 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-05-21", "window": { "start": { "local": "1978-05-21T13:07:00+05:00", "utc": "1978-05-21T08:07:00Z", "ms": 264586019723.7096 }, "end": { "local": "1978-05-21T13:55:00+05:00", "utc": "1978-05-21T08:55:00Z", "ms": 264588899723.7096 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-05-22", "window": { "start": { "local": "1978-05-22T13:07:03+05:00", "utc": "1978-05-22T08:07:03Z", "ms": 264672423358.77124 }, "end": { "local": "1978-05-22T13:55:03+05:00", "utc": "1978-05-22T08:55:03Z", "ms": 264675303358.77124 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 21:17 on Sun 21 May to 18:17 on Mon 22 May.", "fact": "1978-05-21T16:17:10Z → 1978-05-22T13:16:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:07–13:55 on the 21st, 13:07–13:55 on the 22nd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 21st and 48 of 48 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 15698 s" }, { "step": "ruling", "text": "Sampat Gaurī Vrata, Tehran, 1978: Monday 22 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sampat-gauri-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Sampat gauri vrata (paraviddha), Phuladola (Bengal & Orissa) (paraviddha), Gandhesvari puja (Bengal) (purvaviddha), Buddha purnima, Vaisakhi purnima." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-22", "confidence": "determinate" } ], "quote": "In Tehran, Sampat Gaurī Vrata 1978 falls on Monday 22 May. Pūrṇimā runs from 21:17 on Sun 21 May to 18:17 on Mon 22 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/sampat-gauri-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-05-25", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-05-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18416, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-05-25T08:00:24+05:00", "utc": "1978-05-25T03:00:24Z", "ms": 264913224028.64883 }, "end": { "local": "1978-05-26T04:43:42+05:00", "utc": "1978-05-25T23:43:42Z", "ms": 264987822463.2331 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-25T08:00:24+05:00", "utc": "1978-05-25T03:00:24Z", "ms": 264913224028.64883 }, "end": { "local": "1978-05-26T04:43:42+05:00", "utc": "1978-05-25T23:43:42Z", "ms": 264987822463.2331 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-05-24", "window": { "start": { "local": "1978-05-24T22:39:47+05:00", "utc": "1978-05-24T17:39:47Z", "ms": 264879587495.28598 }, "end": { "local": "1978-05-24T22:39:47+05:00", "utc": "1978-05-24T17:39:47Z", "ms": 264879587495.28598 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-05-25", "window": { "start": { "local": "1978-05-25T23:36:46+05:00", "utc": "1978-05-25T18:36:46Z", "ms": 264969406137.88126 }, "end": { "local": "1978-05-25T23:36:46+05:00", "utc": "1978-05-25T18:36:46Z", "ms": 264969406137.88126 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 08:00 on Thu 25 May to 04:44 on Fri 26 May.", "fact": "1978-05-25T03:00:24Z → 1978-05-25T23:43:42Z" }, { "step": "kaala", "text": "Moonrise is at 22:40 on the 24th and 23:37 on the 25th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 24th and is on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18416 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Thursday 25 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-05-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-05-25", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Thursday 25 May. Caturthī runs from 08:00 on Thu 25 May to 04:44 on Fri 26 May and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-05-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-06-01", "festival": "ekadashi", "name": "Aparā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 40694, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-05-31T18:46:52+05:00", "utc": "1978-05-31T13:46:52Z", "ms": 265470411663.559 }, "end": { "local": "1978-06-01T19:01:35+05:00", "utc": "1978-06-01T14:01:35Z", "ms": 265557695497.65396 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-05-31T18:46:52+05:00", "utc": "1978-05-31T13:46:52Z", "ms": 265470411663.559 }, "end": { "local": "1978-06-01T19:01:35+05:00", "utc": "1978-06-01T14:01:35Z", "ms": 265557695497.65396 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-06-01", "window": { "start": { "local": "1978-06-01T06:20:09+05:00", "utc": "1978-06-01T01:20:09Z", "ms": 265512009423.73462 }, "end": { "local": "1978-06-01T06:20:09+05:00", "utc": "1978-06-01T01:20:09Z", "ms": 265512009423.73462 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-06-02", "window": { "start": { "local": "1978-06-02T06:19:50+05:00", "utc": "1978-06-02T01:19:50Z", "ms": 265598389613.79736 }, "end": { "local": "1978-06-02T06:19:50+05:00", "utc": "1978-06-02T01:19:50Z", "ms": 265598389613.79736 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:47 on Wed 31 May to 19:02 on Thu 1 Jun.", "fact": "1978-05-31T13:46:52Z → 1978-06-01T14:01:35Z" }, { "step": "kaala", "text": "Sunrise is at 06:20 on the 1st and 06:20 on the 2nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 1st and is not on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 40694 s" }, { "step": "ruling", "text": "Aparā Ekādaśī, Tehran, 1978: Thursday 1 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-01", "confidence": "determinate" } ], "quote": "In Tehran, Aparā Ekādaśī 1978 falls on Thursday 1 June. Ekādaśī runs from 18:47 on Wed 31 May to 19:02 on Thu 1 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-06-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-06-02", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-02", "confidence": "boundary", "boundary_reasons": [ "margin", "tie-break-unstated" ], "boundary_margin_s": 239, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-06-02T19:43:32+05:00", "utc": "1978-06-02T14:43:32Z", "ms": 265646612090.83835 }, "end": { "local": "1978-06-03T20:49:18+05:00", "utc": "1978-06-03T15:49:18Z", "ms": 265736958383.36862 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-02T19:43:32+05:00", "utc": "1978-06-02T14:43:32Z", "ms": 265646612090.83835 }, "end": { "local": "1978-06-03T20:49:18+05:00", "utc": "1978-06-03T15:49:18Z", "ms": 265736958383.36862 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-06-02", "window": { "start": { "local": "1978-06-02T20:44:42+05:00", "utc": "1978-06-02T15:44:42Z", "ms": 265650282446.94174 }, "end": { "local": "1978-06-02T22:01:21+05:00", "utc": "1978-06-02T17:01:21Z", "ms": 265654880987.59476 } }, "covered_min": 77, "window_min": 77, "qualifies": true }, { "local_date": "1978-06-03", "window": { "start": { "local": "1978-06-03T20:45:19+05:00", "utc": "1978-06-03T15:45:19Z", "ms": 265736719112.74506 }, "end": { "local": "1978-06-03T22:01:51+05:00", "utc": "1978-06-03T17:01:51Z", "ms": 265741310576.0129 } }, "covered_min": 4, "window_min": 77, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:44 on Fri 2 Jun to 20:49 on Sat 3 Jun.", "fact": "1978-06-02T14:43:32Z → 1978-06-03T15:49:18Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:45–22:01 on the 2nd, 20:45–22:02 on the 3rd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 77 of 77 minutes on the 2nd and 4 of 77 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 239 s < 300 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Friday 2 June.", "fact": "confidence: boundary (margin, tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-02", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-02", "confidence": "boundary" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Friday 2 June. Trayodaśī runs from 19:44 on Fri 2 Jun to 20:49 on Sat 3 Jun and covers all of pradoṣa that evening. It also reaches the next evening for 4 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 3 min 59 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-06-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-06-03", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10345, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-06-03T20:49:18+05:00", "utc": "1978-06-03T15:49:18Z", "ms": 265736958383.36862 }, "end": { "local": "1978-06-04T22:16:03+05:00", "utc": "1978-06-04T17:16:03Z", "ms": 265828563078.38254 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-03T20:49:18+05:00", "utc": "1978-06-03T15:49:18Z", "ms": 265736958383.36862 }, "end": { "local": "1978-06-04T22:16:03+05:00", "utc": "1978-06-04T17:16:03Z", "ms": 265828563078.38254 } }, "kaala": "nishita", "days": [ { "local_date": "1978-06-03", "window": { "start": { "local": "1978-06-04T01:08:17+05:00", "utc": "1978-06-03T20:08:17Z", "ms": 265752497099.99948 }, "end": { "local": "1978-06-04T01:56:17+05:00", "utc": "1978-06-03T20:56:17Z", "ms": 265755377099.99948 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-06-04", "window": { "start": { "local": "1978-06-05T01:08:28+05:00", "utc": "1978-06-04T20:08:28Z", "ms": 265838907595.30136 }, "end": { "local": "1978-06-05T01:56:28+05:00", "utc": "1978-06-04T20:56:28Z", "ms": 265841787595.30136 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 20:49 on Sat 3 Jun to 22:16 on Sun 4 Jun.", "fact": "1978-06-03T15:49:18Z → 1978-06-04T17:16:03Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 01:08–01:56 on the 3rd, 01:08–01:56 on the 4th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 3rd and 0 of 48 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 10345 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Saturday 3 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-03", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Saturday 3 June. Caturdaśī runs from 20:49 on Sat 3 Jun to 22:16 on Sun 4 Jun and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-06-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rambha-tritiya", "festival": "rambha-tritiya", "name": "Rambhā Tṛtīyā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23158, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-06-08T04:18:47+05:00", "utc": "1978-06-07T23:18:47Z", "ms": 266109526576.4264 }, "end": { "local": "1978-06-09T06:43:30+05:00", "utc": "1978-06-09T01:43:30Z", "ms": 266204609872.74408 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-08T04:18:47+05:00", "utc": "1978-06-07T23:18:47Z", "ms": 266109526576.4264 }, "end": { "local": "1978-06-09T06:43:30+05:00", "utc": "1978-06-09T01:43:30Z", "ms": 266204609872.74408 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-06-08", "window": { "start": { "local": "1978-06-08T13:09:17+05:00", "utc": "1978-06-08T08:09:17Z", "ms": 266141356817.192 }, "end": { "local": "1978-06-08T13:57:17+05:00", "utc": "1978-06-08T08:57:17Z", "ms": 266144236817.192 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-06-09", "window": { "start": { "local": "1978-06-09T13:09:28+05:00", "utc": "1978-06-09T08:09:28Z", "ms": 266227767987.24768 }, "end": { "local": "1978-06-09T13:57:28+05:00", "utc": "1978-06-09T08:57:28Z", "ms": 266230647987.24768 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 04:19 on Thu 8 Jun to 06:43 on Fri 9 Jun.", "fact": "1978-06-07T23:18:47Z → 1978-06-09T01:43:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:09–13:57 on the 8th, 13:09–13:57 on the 9th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 8th and 0 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 23158 s" }, { "step": "ruling", "text": "Rambhā Tṛtīyā, Tehran, 1978: Thursday 8 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rambha-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Rambha trtiya (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-08", "confidence": "determinate" } ], "quote": "In Tehran, Rambhā Tṛtīyā 1978 falls on Thursday 8 June. Tṛtīyā runs from 04:19 on Thu 8 Jun to 06:43 on Fri 9 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/rambha-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-06-09", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14325, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-06-09T06:43:30+05:00", "utc": "1978-06-09T01:43:30Z", "ms": 266204609872.74408 }, "end": { "local": "1978-06-10T09:10:54+05:00", "utc": "1978-06-10T04:10:54Z", "ms": 266299853940.50735 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-09T06:43:30+05:00", "utc": "1978-06-09T01:43:30Z", "ms": 266204609872.74408 }, "end": { "local": "1978-06-10T09:10:54+05:00", "utc": "1978-06-10T04:10:54Z", "ms": 266299853940.50735 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-06-09", "window": { "start": { "local": "1978-06-09T13:09:28+05:00", "utc": "1978-06-09T08:09:28Z", "ms": 266227767987.24768 }, "end": { "local": "1978-06-09T13:57:28+05:00", "utc": "1978-06-09T08:57:28Z", "ms": 266230647987.24768 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-06-10", "window": { "start": { "local": "1978-06-10T13:09:39+05:00", "utc": "1978-06-10T08:09:39Z", "ms": 266314179392.7588 }, "end": { "local": "1978-06-10T13:57:39+05:00", "utc": "1978-06-10T08:57:39Z", "ms": 266317059392.7588 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 06:43 on Fri 9 Jun to 09:11 on Sat 10 Jun.", "fact": "1978-06-09T01:43:30Z → 1978-06-10T04:10:54Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:09–13:57 on the 9th, 13:10–13:58 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 9th and 0 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 14325 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Friday 9 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-09", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Friday 9 June. Caturthī runs from 06:43 on Fri 9 Jun to 09:11 on Sat 10 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-06-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/skanda-shashthi-jyaishtha", "festival": "skanda-shashthi-jyaishtha", "name": "Skanda Ṣaṣṭhī (Jyaiṣṭha)", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1337, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-06-11T11:31:58+05:00", "utc": "1978-06-11T06:31:58Z", "ms": 266394717884.96243 }, "end": { "local": "1978-06-12T13:35:45+05:00", "utc": "1978-06-12T08:35:45Z", "ms": 266488545437.56735 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-11T11:31:58+05:00", "utc": "1978-06-11T06:31:58Z", "ms": 266394717884.96243 }, "end": { "local": "1978-06-12T13:35:45+05:00", "utc": "1978-06-12T08:35:45Z", "ms": 266488545437.56735 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-06-11", "window": { "start": { "local": "1978-06-11T13:09:51+05:00", "utc": "1978-06-11T08:09:51Z", "ms": 266400591010.32336 }, "end": { "local": "1978-06-11T13:57:51+05:00", "utc": "1978-06-11T08:57:51Z", "ms": 266403471010.32336 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-06-12", "window": { "start": { "local": "1978-06-12T13:10:03+05:00", "utc": "1978-06-12T08:10:03Z", "ms": 266487002816.5503 }, "end": { "local": "1978-06-12T13:58:03+05:00", "utc": "1978-06-12T08:58:03Z", "ms": 266489882816.5503 } }, "covered_min": 26, "window_min": 48, "qualifies": true } ], "decided_by": "purvaviddha", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 11:32 on Sun 11 Jun to 13:36 on Mon 12 Jun.", "fact": "1978-06-11T06:31:58Z → 1978-06-12T08:35:45Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:10–13:58 on the 11th, 13:10–13:58 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 11th and 26 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both middays qualify. Pūrvaviddhā: the first is taken.", "fact": "priority: purvaviddha → purvaviddha · margin 1337 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī (Jyaiṣṭha), Tehran, 1978: Sunday 11 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "skanda-shashthi-jyaishtha", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Aranya sasthi, Aranya gauri vrata, (paraviddha), Skanda sasthi, (purvaviddha), Sitala sasthi yatra (Orissa)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-11", "confidence": "determinate" } ], "quote": "In Tehran, Skanda Ṣaṣṭhī (Jyaiṣṭha) 1978 falls on Sunday 11 June. Ṣaṣṭhī runs from 11:32 on Sun 11 Jun to 13:36 on Mon 12 Jun and covers all of madhyāhna that midday. It also reaches the next midday for 26 minutes; by the rule the first midday is taken.", "cite": "https://ahargana.org/tehran/festivals/1978/skanda-shashthi-jyaishtha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/aranya-gauri-vrata", "festival": "aranya-gauri-vrata", "name": "Araṇya Gaurī Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1337, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-06-11T11:31:58+05:00", "utc": "1978-06-11T06:31:58Z", "ms": 266394717884.96243 }, "end": { "local": "1978-06-12T13:35:45+05:00", "utc": "1978-06-12T08:35:45Z", "ms": 266488545437.56735 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-11T11:31:58+05:00", "utc": "1978-06-11T06:31:58Z", "ms": 266394717884.96243 }, "end": { "local": "1978-06-12T13:35:45+05:00", "utc": "1978-06-12T08:35:45Z", "ms": 266488545437.56735 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-06-11", "window": { "start": { "local": "1978-06-11T13:09:51+05:00", "utc": "1978-06-11T08:09:51Z", "ms": 266400591010.32336 }, "end": { "local": "1978-06-11T13:57:51+05:00", "utc": "1978-06-11T08:57:51Z", "ms": 266403471010.32336 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-06-12", "window": { "start": { "local": "1978-06-12T13:10:03+05:00", "utc": "1978-06-12T08:10:03Z", "ms": 266487002816.5503 }, "end": { "local": "1978-06-12T13:58:03+05:00", "utc": "1978-06-12T08:58:03Z", "ms": 266489882816.5503 } }, "covered_min": 26, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 11:32 on Sun 11 Jun to 13:36 on Mon 12 Jun.", "fact": "1978-06-11T06:31:58Z → 1978-06-12T08:35:45Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:10–13:58 on the 11th, 13:10–13:58 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 11th and 26 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both middays qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 1337 s" }, { "step": "ruling", "text": "Araṇya Gaurī Vrata, Tehran, 1978: Monday 12 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "aranya-gauri-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Aranya sasthi, Aranya gauri vrata, (paraviddha), Skanda sasthi, (purvaviddha), Sitala sasthi yatra (Orissa)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-12", "confidence": "determinate" } ], "quote": "In Tehran, Araṇya Gaurī Vrata 1978 falls on Monday 12 June. Ṣaṣṭhī runs from 11:32 on Sun 11 Jun to 13:36 on Mon 12 Jun and covers 26 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.", "cite": "https://ahargana.org/tehran/festivals/1978/aranya-gauri-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-06-17", "festival": "ekadashi", "name": "Nirjalā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27713, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-06-16T15:32:42+05:00", "utc": "1978-06-16T10:32:42Z", "ms": 266841162008.35715 }, "end": { "local": "1978-06-17T14:00:07+05:00", "utc": "1978-06-17T09:00:07Z", "ms": 266922006744.08047 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-16T15:32:42+05:00", "utc": "1978-06-16T10:32:42Z", "ms": 266841162008.35715 }, "end": { "local": "1978-06-17T14:00:07+05:00", "utc": "1978-06-17T09:00:07Z", "ms": 266922006744.08047 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-06-16", "window": { "start": { "local": "1978-06-16T06:18:08+05:00", "utc": "1978-06-16T01:18:08Z", "ms": 266807888461.0266 }, "end": { "local": "1978-06-16T06:18:08+05:00", "utc": "1978-06-16T01:18:08Z", "ms": 266807888461.0266 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-06-17", "window": { "start": { "local": "1978-06-17T06:18:13+05:00", "utc": "1978-06-17T01:18:13Z", "ms": 266894293472.00122 }, "end": { "local": "1978-06-17T06:18:13+05:00", "utc": "1978-06-17T01:18:13Z", "ms": 266894293472.00122 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 15:33 on Fri 16 Jun to 14:00 on Sat 17 Jun.", "fact": "1978-06-16T10:32:42Z → 1978-06-17T09:00:07Z" }, { "step": "kaala", "text": "Sunrise is at 06:18 on the 16th and 06:18 on the 17th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 16th and is on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 27713 s" }, { "step": "ruling", "text": "Nirjalā Ekādaśī, Tehran, 1978: Saturday 17 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-17", "confidence": "determinate" } ], "quote": "In Tehran, Nirjalā Ekādaśī 1978 falls on Saturday 17 June. Ekādaśī runs from 15:33 on Fri 16 Jun to 14:00 on Sat 17 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-06-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shri-rama-dvadashi", "festival": "shri-rama-dvadashi", "name": "Śrī Rāma Dvādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-18", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 63, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-06-17T14:00:07+05:00", "utc": "1978-06-17T09:00:07Z", "ms": 266922006744.08047 }, "end": { "local": "1978-06-18T11:41:22+05:00", "utc": "1978-06-18T06:41:22Z", "ms": 267000082464.18298 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-17T14:00:07+05:00", "utc": "1978-06-17T09:00:07Z", "ms": 266922006744.08047 }, "end": { "local": "1978-06-18T11:41:22+05:00", "utc": "1978-06-18T06:41:22Z", "ms": 267000082464.18298 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-06-17", "window": { "start": { "local": "1978-06-17T13:11:04+05:00", "utc": "1978-06-17T08:11:04Z", "ms": 266919063873.2317 }, "end": { "local": "1978-06-17T13:59:04+05:00", "utc": "1978-06-17T08:59:04Z", "ms": 266921943873.2317 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-06-18", "window": { "start": { "local": "1978-06-18T13:11:16+05:00", "utc": "1978-06-18T08:11:16Z", "ms": 267005476335.61115 }, "end": { "local": "1978-06-18T13:59:16+05:00", "utc": "1978-06-18T08:59:16Z", "ms": 267008356335.61115 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 14:00 on Sat 17 Jun to 11:41 on Sun 18 Jun.", "fact": "1978-06-17T09:00:07Z → 1978-06-18T06:41:22Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:11–13:59 on the 17th, 13:11–13:59 on the 18th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 17th and 0 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: purvaviddha → second-day · margin 63 s < 300 s" }, { "step": "ruling", "text": "Śrī Rāma Dvādaśī, Tehran, 1978: Sunday 18 June.", "fact": "confidence: boundary (margin)" } ], "rule": { "kind": "lunar", "id": "shri-rama-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Sri Rama dvadasi (purvaviddha), Campaka dvadasi (Orissa) (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-18", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-17", "confidence": "determinate" } ], "quote": "In Tehran, Śrī Rāma Dvādaśī 1978 falls on Sunday 18 June. Dvādaśī runs from 14:00 on Sat 17 Jun to 11:41 on Sun 18 Jun, and reaches madhyāhna on neither day. It is 1 min 03 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/tehran/festivals/1978/shri-rama-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-06-18", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33050, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-06-18T11:41:22+05:00", "utc": "1978-06-18T06:41:22Z", "ms": 267000082464.18298 }, "end": { "local": "1978-06-19T08:43:44+05:00", "utc": "1978-06-19T03:43:44Z", "ms": 267075824250.79697 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-18T11:41:22+05:00", "utc": "1978-06-18T06:41:22Z", "ms": 267000082464.18298 }, "end": { "local": "1978-06-19T08:43:44+05:00", "utc": "1978-06-19T03:43:44Z", "ms": 267075824250.79697 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-06-18", "window": { "start": { "local": "1978-06-18T20:52:13+05:00", "utc": "1978-06-18T15:52:13Z", "ms": 267033132625.92145 }, "end": { "local": "1978-06-18T22:07:43+05:00", "utc": "1978-06-18T17:07:43Z", "ms": 267037662697.78903 } }, "covered_min": 76, "window_min": 76, "qualifies": true }, { "local_date": "1978-06-19", "window": { "start": { "local": "1978-06-19T20:52:30+05:00", "utc": "1978-06-19T15:52:30Z", "ms": 267119549503.06046 }, "end": { "local": "1978-06-19T22:07:59+05:00", "utc": "1978-06-19T17:07:59Z", "ms": 267124078611.2563 } }, "covered_min": 0, "window_min": 75, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:41 on Sun 18 Jun to 08:44 on Mon 19 Jun.", "fact": "1978-06-18T06:41:22Z → 1978-06-19T03:43:44Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:52–22:08 on the 18th, 20:52–22:08 on the 19th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 76 of 76 minutes on the 18th and 0 of 75 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33050 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Sunday 18 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-18", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Sunday 18 June. Trayodaśī runs from 11:41 on Sun 18 Jun to 08:44 on Mon 19 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-06-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vata-savitri-vrata", "festival": "vata-savitri-vrata", "name": "Vaṭa Sāvitrī Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12137, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-06-20T05:16:34+05:00", "utc": "1978-06-20T00:16:34Z", "ms": 267149793934.47278 }, "end": { "local": "1978-06-21T01:30:30+05:00", "utc": "1978-06-20T20:30:30Z", "ms": 267222630483.88116 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-20T05:16:34+05:00", "utc": "1978-06-20T00:16:34Z", "ms": 267149793934.47278 }, "end": { "local": "1978-06-21T01:30:30+05:00", "utc": "1978-06-20T20:30:30Z", "ms": 267222630483.88116 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-06-19", "window": { "start": { "local": "1978-06-19T20:52:30+05:00", "utc": "1978-06-19T15:52:30Z", "ms": 267119549503.06046 }, "end": { "local": "1978-06-19T22:07:59+05:00", "utc": "1978-06-19T17:07:59Z", "ms": 267124078611.2563 } }, "covered_min": 0, "window_min": 75, "qualifies": false }, { "local_date": "1978-06-20", "window": { "start": { "local": "1978-06-20T20:52:45+05:00", "utc": "1978-06-20T15:52:45Z", "ms": 267205964884.97958 }, "end": { "local": "1978-06-20T22:08:13+05:00", "utc": "1978-06-20T17:08:13Z", "ms": 267210493430.63962 } }, "covered_min": 75, "window_min": 75, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:17 on Tue 20 Jun to 01:31 on Wed 21 Jun.", "fact": "1978-06-20T00:16:34Z → 1978-06-20T20:30:30Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:52–22:08 on the 19th, 20:53–22:08 on the 20th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 0 of 75 minutes on the 19th and 75 of 75 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 12137 s" }, { "step": "ruling", "text": "Vaṭa Sāvitrī Vrata, Tehran, 1978: Tuesday 20 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vata-savitri-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Vata-savitri vrata (Deccan) (pradosavyapini, purvaviddha), Snanayatra (Bengal & Orissa) (paraviddha)." } ], "kaala": "pradosha", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-20", "confidence": "determinate" } ], "quote": "In Tehran, Vaṭa Sāvitrī Vrata 1978 falls on Tuesday 20 June. Pūrṇimā runs from 05:17 on Tue 20 Jun to 01:31 on Wed 21 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/vata-savitri-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-06-23", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-06-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32180, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-06-23T14:11:17+05:00", "utc": "1978-06-23T09:11:17Z", "ms": 267441076538.30692 }, "end": { "local": "1978-06-24T11:00:09+05:00", "utc": "1978-06-24T06:00:09Z", "ms": 267516009143.21677 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-23T14:11:17+05:00", "utc": "1978-06-23T09:11:17Z", "ms": 267441076538.30692 }, "end": { "local": "1978-06-24T11:00:09+05:00", "utc": "1978-06-24T06:00:09Z", "ms": 267516009143.21677 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-06-23", "window": { "start": { "local": "1978-06-23T23:07:37+05:00", "utc": "1978-06-23T18:07:37Z", "ms": 267473257008.17114 }, "end": { "local": "1978-06-23T23:07:37+05:00", "utc": "1978-06-23T18:07:37Z", "ms": 267473257008.17114 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-06-24", "window": { "start": { "local": "1978-06-24T23:51:40+05:00", "utc": "1978-06-24T18:51:40Z", "ms": 267562299589.61267 }, "end": { "local": "1978-06-24T23:51:40+05:00", "utc": "1978-06-24T18:51:40Z", "ms": 267562299589.61267 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 14:11 on Fri 23 Jun to 11:00 on Sat 24 Jun.", "fact": "1978-06-23T09:11:17Z → 1978-06-24T06:00:09Z" }, { "step": "kaala", "text": "Moonrise is at 23:08 on the 23rd and 23:52 on the 24th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 23rd and is not on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 32180 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Friday 23 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-06-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-06-23", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Friday 23 June. Caturthī runs from 14:11 on Fri 23 Jun to 11:00 on Sat 24 Jun and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-06-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-07-01", "festival": "ekadashi", "name": "Yoginī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1153, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-06-30T05:25:42+05:00", "utc": "1978-06-30T00:25:42Z", "ms": 268014342277.80103 }, "end": { "local": "1978-07-01T06:41:12+05:00", "utc": "1978-07-01T01:41:12Z", "ms": 268105272416.7001 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-06-30T05:25:42+05:00", "utc": "1978-06-30T00:25:42Z", "ms": 268014342277.80103 }, "end": { "local": "1978-07-01T06:41:12+05:00", "utc": "1978-07-01T01:41:12Z", "ms": 268105272416.7001 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-06-30", "window": { "start": { "local": "1978-06-30T06:21:34+05:00", "utc": "1978-06-30T01:21:34Z", "ms": 268017694196.14948 }, "end": { "local": "1978-06-30T06:21:34+05:00", "utc": "1978-06-30T01:21:34Z", "ms": 268017694196.14948 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-07-01", "window": { "start": { "local": "1978-07-01T06:21:59+05:00", "utc": "1978-07-01T01:21:59Z", "ms": 268104119263.18857 }, "end": { "local": "1978-07-01T06:21:59+05:00", "utc": "1978-07-01T01:21:59Z", "ms": 268104119263.18857 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 05:26 on Fri 30 Jun to 06:41 on Sat 1 Jul.", "fact": "1978-06-30T00:25:42Z → 1978-07-01T01:41:12Z" }, { "step": "kaala", "text": "Sunrise is at 06:22 on the 30th and 06:22 on the 1st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 30th and is on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Both sunrises qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 1153 s" }, { "step": "ruling", "text": "Yoginī Ekādaśī, Tehran, 1978: Saturday 1 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-01", "confidence": "determinate" } ], "quote": "In Tehran, Yoginī Ekādaśī 1978 falls on Saturday 1 July. Ekādaśī runs from 05:26 on Fri 30 Jun to 06:41 on Sat 1 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-07-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-07-02", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36678, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-07-02T08:20:57+05:00", "utc": "1978-07-02T03:20:57Z", "ms": 268197657296.59064 }, "end": { "local": "1978-07-03T10:18:58+05:00", "utc": "1978-07-03T05:18:58Z", "ms": 268291138357.96347 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-02T08:20:57+05:00", "utc": "1978-07-02T03:20:57Z", "ms": 268197657296.59064 }, "end": { "local": "1978-07-03T10:18:58+05:00", "utc": "1978-07-03T05:18:58Z", "ms": 268291138357.96347 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-07-01", "window": { "start": { "local": "1978-07-01T20:53:50+05:00", "utc": "1978-07-01T15:53:50Z", "ms": 268156430349.93784 }, "end": { "local": "1978-07-01T22:09:39+05:00", "utc": "1978-07-01T17:09:39Z", "ms": 268160979043.51746 } }, "covered_min": 0, "window_min": 76, "qualifies": false }, { "local_date": "1978-07-02", "window": { "start": { "local": "1978-07-02T20:53:46+05:00", "utc": "1978-07-02T15:53:46Z", "ms": 268242826457.45734 }, "end": { "local": "1978-07-02T22:09:39+05:00", "utc": "1978-07-02T17:09:39Z", "ms": 268247379333.15625 } }, "covered_min": 76, "window_min": 76, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 08:21 on Sun 2 Jul to 10:19 on Mon 3 Jul.", "fact": "1978-07-02T03:20:57Z → 1978-07-03T05:18:58Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:54–22:10 on the 1st, 20:54–22:10 on the 2nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 76 minutes on the 1st and 76 of 76 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 36678 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Sunday 2 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-02", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Sunday 2 July. Trayodaśī runs from 08:21 on Sun 2 Jul to 10:19 on Mon 3 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-07-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-07-03", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29799, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-07-03T10:18:58+05:00", "utc": "1978-07-03T05:18:58Z", "ms": 268291138357.96347 }, "end": { "local": "1978-07-04T12:30:11+05:00", "utc": "1978-07-04T07:30:11Z", "ms": 268385410910.6311 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-03T10:18:58+05:00", "utc": "1978-07-03T05:18:58Z", "ms": 268291138357.96347 }, "end": { "local": "1978-07-04T12:30:11+05:00", "utc": "1978-07-04T07:30:11Z", "ms": 268385410910.6311 } }, "kaala": "nishita", "days": [ { "local_date": "1978-07-02", "window": { "start": { "local": "1978-07-03T01:14:20+05:00", "utc": "1978-07-02T20:14:20Z", "ms": 268258459741.3283 }, "end": { "local": "1978-07-03T02:02:20+05:00", "utc": "1978-07-02T21:02:20Z", "ms": 268261339741.3283 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-07-03", "window": { "start": { "local": "1978-07-04T01:14:31+05:00", "utc": "1978-07-03T20:14:31Z", "ms": 268344871255.6958 }, "end": { "local": "1978-07-04T02:02:31+05:00", "utc": "1978-07-03T21:02:31Z", "ms": 268347751255.6958 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:19 on Mon 3 Jul to 12:30 on Tue 4 Jul.", "fact": "1978-07-03T05:18:58Z → 1978-07-04T07:30:11Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 01:14–02:02 on the 2nd, 01:15–02:03 on the 3rd.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 2nd and 48 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 29799 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Monday 3 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-03", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Monday 3 July. Caturdaśī runs from 10:19 on Mon 3 Jul to 12:30 on Tue 4 Jul and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-07-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rathayatra", "festival": "rathayatra", "name": "Rathayātrā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11553, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1978-07-06T17:15:21+05:00", "utc": "1978-07-06T12:15:21Z", "ms": 268575321068.4103 }, "end": { "local": "1978-07-07T19:40:48+05:00", "utc": "1978-07-07T14:40:48Z", "ms": 268670448231.13934 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-06T17:15:21+05:00", "utc": "1978-07-06T12:15:21Z", "ms": 268575321068.4103 }, "end": { "local": "1978-07-07T19:40:48+05:00", "utc": "1978-07-07T14:40:48Z", "ms": 268670448231.13934 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-07-06", "window": { "start": { "local": "1978-07-06T13:14:48+05:00", "utc": "1978-07-06T08:14:48Z", "ms": 268560887987.55585 }, "end": { "local": "1978-07-06T14:02:48+05:00", "utc": "1978-07-06T09:02:48Z", "ms": 268563767987.55585 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-07-07", "window": { "start": { "local": "1978-07-07T13:14:58+05:00", "utc": "1978-07-07T08:14:58Z", "ms": 268647297663.88922 }, "end": { "local": "1978-07-07T14:02:58+05:00", "utc": "1978-07-07T09:02:58Z", "ms": 268650177663.88922 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 17:15 on Thu 6 Jul to 19:41 on Fri 7 Jul.", "fact": "1978-07-06T12:15:21Z → 1978-07-07T14:40:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:15–14:03 on the 6th, 13:15–14:03 on the 7th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvitīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 6th and 48 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 11553 s" }, { "step": "ruling", "text": "Rathayātrā, Tehran, 1978: Friday 7 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rathayatra", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 2 Rathayatra (paraviddha, special when combined with naksatra 'Pusya')" } ], "not_evaluated": "The row calls the day special with Puṣya nakṣatra; the nakṣatra is not tested.", "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-07", "confidence": "determinate" } ], "quote": "In Tehran, Rathayātrā 1978 falls on Friday 7 July. Dvitīyā runs from 17:15 on Thu 6 Jul to 19:41 on Fri 7 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/rathayatra", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-07-09", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28670, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-07-08T22:00:57+05:00", "utc": "1978-07-08T17:00:57Z", "ms": 268765256983.06805 }, "end": { "local": "1978-07-10T00:08:29+05:00", "utc": "1978-07-09T19:08:29Z", "ms": 268859309061.37323 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-08T22:00:57+05:00", "utc": "1978-07-08T17:00:57Z", "ms": 268765256983.06805 }, "end": { "local": "1978-07-10T00:08:29+05:00", "utc": "1978-07-09T19:08:29Z", "ms": 268859309061.37323 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-07-08", "window": { "start": { "local": "1978-07-08T13:15:07+05:00", "utc": "1978-07-08T08:15:07Z", "ms": 268733706967.5169 }, "end": { "local": "1978-07-08T14:03:07+05:00", "utc": "1978-07-08T09:03:07Z", "ms": 268736586967.5169 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-07-09", "window": { "start": { "local": "1978-07-09T13:15:16+05:00", "utc": "1978-07-09T08:15:16Z", "ms": 268820115877.22153 }, "end": { "local": "1978-07-09T14:03:16+05:00", "utc": "1978-07-09T09:03:16Z", "ms": 268822995877.22153 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:01 on Sat 8 Jul to 00:08 on Mon 10 Jul.", "fact": "1978-07-08T17:00:57Z → 1978-07-09T19:08:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:15–14:03 on the 8th, 13:15–14:03 on the 9th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 8th and 48 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 28670 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Sunday 9 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-09", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Sunday 9 July. Caturthī runs from 22:01 on Sat 8 Jul to 00:08 on Mon 10 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-07-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/skanda-panchami", "festival": "skanda-panchami", "name": "Skanda Pañcamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36313, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-07-10T00:08:29+05:00", "utc": "1978-07-09T19:08:29Z", "ms": 268859309061.37323 }, "end": { "local": "1978-07-11T01:54:43+05:00", "utc": "1978-07-10T20:54:43Z", "ms": 268952083356.47952 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-10T00:08:29+05:00", "utc": "1978-07-09T19:08:29Z", "ms": 268859309061.37323 }, "end": { "local": "1978-07-11T01:54:43+05:00", "utc": "1978-07-10T20:54:43Z", "ms": 268952083356.47952 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-07-09", "window": { "start": { "local": "1978-07-09T13:15:16+05:00", "utc": "1978-07-09T08:15:16Z", "ms": 268820115877.22153 }, "end": { "local": "1978-07-09T14:03:16+05:00", "utc": "1978-07-09T09:03:16Z", "ms": 268822995877.22153 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-07-10", "window": { "start": { "local": "1978-07-10T13:15:24+05:00", "utc": "1978-07-10T08:15:24Z", "ms": 268906524372.6818 }, "end": { "local": "1978-07-10T14:03:24+05:00", "utc": "1978-07-10T09:03:24Z", "ms": 268909404372.6818 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 00:08 on Mon 10 Jul to 01:55 on Tue 11 Jul.", "fact": "1978-07-09T19:08:29Z → 1978-07-10T20:54:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:15–14:03 on the 9th, 13:15–14:03 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 36313 s" }, { "step": "ruling", "text": "Skanda Pañcamī, Tehran, 1978: Monday 10 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "skanda-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Skanda pancami (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-10", "confidence": "determinate" } ], "quote": "In Tehran, Skanda Pañcamī 1978 falls on Monday 10 July. Pañcamī runs from 00:08 on Mon 10 Jul to 01:55 on Tue 11 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/skanda-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vivasvat-saptami", "festival": "vivasvat-saptami", "name": "Vivasvat Saptamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34114, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1978-07-12T03:10:27+05:00", "utc": "1978-07-11T22:10:27Z", "ms": 269043026886.6746 }, "end": { "local": "1978-07-13T03:47:14+05:00", "utc": "1978-07-12T22:47:14Z", "ms": 269131633678.14658 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-12T03:10:27+05:00", "utc": "1978-07-11T22:10:27Z", "ms": 269043026886.6746 }, "end": { "local": "1978-07-13T03:47:14+05:00", "utc": "1978-07-12T22:47:14Z", "ms": 269131633678.14658 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-07-12", "window": { "start": { "local": "1978-07-12T13:15:40+05:00", "utc": "1978-07-12T08:15:40Z", "ms": 269079340044.6896 }, "end": { "local": "1978-07-12T14:03:40+05:00", "utc": "1978-07-12T09:03:40Z", "ms": 269082220044.6896 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-07-13", "window": { "start": { "local": "1978-07-13T13:15:47+05:00", "utc": "1978-07-13T08:15:47Z", "ms": 269165747186.02255 }, "end": { "local": "1978-07-13T14:03:47+05:00", "utc": "1978-07-13T09:03:47Z", "ms": 269168627186.02255 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 03:10 on Wed 12 Jul to 03:47 on Thu 13 Jul.", "fact": "1978-07-11T22:10:27Z → 1978-07-12T22:47:14Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:16–14:04 on the 12th, 13:16–14:04 on the 13th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 48 of 48 minutes on the 12th and 0 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 34114 s" }, { "step": "ruling", "text": "Vivasvat Saptamī, Tehran, 1978: Wednesday 12 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vivasvat-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Vivasvat saptami (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-12", "confidence": "determinate" } ], "quote": "In Tehran, Vivasvat Saptamī 1978 falls on Wednesday 12 July. Saptamī runs from 03:10 on Wed 12 Jul to 03:47 on Thu 13 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vivasvat-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-07-16", "festival": "ekadashi", "name": "Hariśayanī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19956, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-07-16T00:57:44+05:00", "utc": "1978-07-15T19:57:44Z", "ms": 269380664495.77734 }, "end": { "local": "1978-07-16T22:29:42+05:00", "utc": "1978-07-16T17:29:42Z", "ms": 269458181600.0618 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-16T00:57:44+05:00", "utc": "1978-07-15T19:57:44Z", "ms": 269380664495.77734 }, "end": { "local": "1978-07-16T22:29:42+05:00", "utc": "1978-07-16T17:29:42Z", "ms": 269458181600.0618 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-07-16", "window": { "start": { "local": "1978-07-16T06:30:20+05:00", "utc": "1978-07-16T01:30:20Z", "ms": 269400620286.59637 }, "end": { "local": "1978-07-16T06:30:20+05:00", "utc": "1978-07-16T01:30:20Z", "ms": 269400620286.59637 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-07-17", "window": { "start": { "local": "1978-07-17T06:31:00+05:00", "utc": "1978-07-17T01:31:00Z", "ms": 269487060272.8396 }, "end": { "local": "1978-07-17T06:31:00+05:00", "utc": "1978-07-17T01:31:00Z", "ms": 269487060272.8396 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 00:58 on Sun 16 Jul to 22:30 on Sun 16 Jul.", "fact": "1978-07-15T19:57:44Z → 1978-07-16T17:29:42Z" }, { "step": "kaala", "text": "Sunrise is at 06:30 on the 16th and 06:31 on the 17th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 16th and is not on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 19956 s" }, { "step": "ruling", "text": "Hariśayanī Ekādaśī, Tehran, 1978: Sunday 16 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-16", "confidence": "determinate" } ], "quote": "In Tehran, Hariśayanī Ekādaśī 1978 falls on Sunday 16 July. Ekādaśī runs from 00:58 on Sun 16 Jul to 22:30 on Sun 16 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-07-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-07-17", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5072, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-07-17T19:24:50+05:00", "utc": "1978-07-17T14:24:50Z", "ms": 269533489541.36807 }, "end": { "local": "1978-07-18T15:52:05+05:00", "utc": "1978-07-18T10:52:05Z", "ms": 269607124711.189 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-17T19:24:50+05:00", "utc": "1978-07-17T14:24:50Z", "ms": 269533489541.36807 }, "end": { "local": "1978-07-18T15:52:05+05:00", "utc": "1978-07-18T10:52:05Z", "ms": 269607124711.189 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-07-17", "window": { "start": { "local": "1978-07-17T20:49:21+05:00", "utc": "1978-07-17T15:49:21Z", "ms": 269538561277.9398 }, "end": { "local": "1978-07-17T22:07:00+05:00", "utc": "1978-07-17T17:07:00Z", "ms": 269543219891.06418 } }, "covered_min": 78, "window_min": 78, "qualifies": true }, { "local_date": "1978-07-18", "window": { "start": { "local": "1978-07-18T20:48:50+05:00", "utc": "1978-07-18T15:48:50Z", "ms": 269624929867.40683 }, "end": { "local": "1978-07-18T22:06:38+05:00", "utc": "1978-07-18T17:06:38Z", "ms": 269629598160.59708 } }, "covered_min": 0, "window_min": 78, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:25 on Mon 17 Jul to 15:52 on Tue 18 Jul.", "fact": "1978-07-17T14:24:50Z → 1978-07-18T10:52:05Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:49–22:07 on the 17th, 20:49–22:07 on the 18th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 78 of 78 minutes on the 17th and 0 of 78 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5072 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Monday 17 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-17", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Monday 17 July. Trayodaśī runs from 19:25 on Mon 17 Jul to 15:52 on Tue 18 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-07-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vyasa-puja", "festival": "vyasa-puja", "name": "Vyāsa Pūjā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-19", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 4750, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 } }, "kaala": "udaya-3", "days": [ { "local_date": "1978-07-19", "window": { "start": { "local": "1978-07-19T06:32:22+05:00", "utc": "1978-07-19T01:32:22Z", "ms": 269659942066.33368 }, "end": { "local": "1978-07-19T09:23:33+05:00", "utc": "1978-07-19T04:23:33Z", "ms": 269670213012.51736 } }, "covered_min": 0, "window_min": 171, "qualifies": false }, { "local_date": "1978-07-20", "window": { "start": { "local": "1978-07-20T06:33:04+05:00", "utc": "1978-07-20T01:33:04Z", "ms": 269746383813.67044 }, "end": { "local": "1978-07-20T09:23:59+05:00", "utc": "1978-07-20T04:23:59Z", "ms": 269756639468.1825 } }, "covered_min": 92, "window_min": 171, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul.", "fact": "1978-07-19T07:01:44Z → 1978-07-20T03:04:49Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:32–09:24 on the 19th, 06:33–09:24 on the 20th.", "fact": "udaya-3: day-muhurta-1-3 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must hold through the first three muhūrtas after sunrise. It covers 0 of 171 minutes on the 19th and 92 of 171 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Neither morning qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 4750 s" }, { "step": "ruling", "text": "Vyāsa Pūjā, Tehran, 1978: Wednesday 19 July.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "vyasa-puja", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini)." } ], "kaala": "udaya-3", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-19", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-19", "confidence": "boundary" } ], "quote": "In Tehran, Vyāsa Pūjā 1978 falls on Wednesday 19 July. Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul, and reaches the first three muhūrtas after sunrise on neither day.", "cite": "https://ahargana.org/tehran/festivals/1978/vyasa-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/guru-purnima", "festival": "guru-purnima", "name": "Guru Pūrṇimā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4475, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-07-19", "window": { "start": { "local": "1978-07-19T13:16:19+05:00", "utc": "1978-07-19T08:16:19Z", "ms": 269684179431.7929 }, "end": { "local": "1978-07-19T14:04:19+05:00", "utc": "1978-07-19T09:04:19Z", "ms": 269687059431.7929 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-07-20", "window": { "start": { "local": "1978-07-20T13:16:23+05:00", "utc": "1978-07-20T08:16:23Z", "ms": 269770582949.95062 }, "end": { "local": "1978-07-20T14:04:23+05:00", "utc": "1978-07-20T09:04:23Z", "ms": 269773462949.95062 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul.", "fact": "1978-07-19T07:01:44Z → 1978-07-20T03:04:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 13:16–14:04 on the 19th, 13:16–14:04 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 19th and 0 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 4475 s" }, { "step": "ruling", "text": "Guru Pūrṇimā, Tehran, 1978: Wednesday 19 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "guru-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-19", "confidence": "determinate" } ], "quote": "In Tehran, Guru Pūrṇimā 1978 falls on Wednesday 19 July. Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/guru-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/kokila-vrata", "festival": "kokila-vrata", "name": "Kokilā Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21321, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 } }, "kaala": "sayahna", "days": [ { "local_date": "1978-07-19", "window": { "start": { "local": "1978-07-19T17:57:06+05:00", "utc": "1978-07-19T12:57:06Z", "ms": 269701025851.06842 }, "end": { "local": "1978-07-19T20:48:17+05:00", "utc": "1978-07-19T15:48:17Z", "ms": 269711296797.2521 } }, "covered_min": 171, "window_min": 171, "qualifies": true }, { "local_date": "1978-07-20", "window": { "start": { "local": "1978-07-20T17:56:46+05:00", "utc": "1978-07-20T12:56:46Z", "ms": 269787406431.71872 }, "end": { "local": "1978-07-20T20:47:42+05:00", "utc": "1978-07-20T15:47:42Z", "ms": 269797662086.23077 } }, "covered_min": 0, "window_min": 171, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul.", "fact": "1978-07-19T07:01:44Z → 1978-07-20T03:04:49Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 17:57–20:48 on the 19th, 17:57–20:48 on the 20th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 171 of 171 minutes on the 19th and 0 of 171 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one late afternoon qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 21321 s" }, { "step": "ruling", "text": "Kokilā Vrata, Tehran, 1978: Wednesday 19 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "kokila-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini)." } ], "kaala": "sayahna", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-19", "confidence": "determinate" } ], "quote": "In Tehran, Kokilā Vrata 1978 falls on Wednesday 19 July. Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/tehran/festivals/1978/kokila-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shiva-shayanotsava", "festival": "shiva-shayanotsava", "name": "Śiva Śayanotsava", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31592, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1978-07-19T12:01:44+05:00", "utc": "1978-07-19T07:01:44Z", "ms": 269679704466.2959 }, "end": { "local": "1978-07-20T08:04:49+05:00", "utc": "1978-07-20T03:04:49Z", "ms": 269751889409.25226 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-07-19", "window": { "start": { "local": "1978-07-19T20:48:17+05:00", "utc": "1978-07-19T15:48:17Z", "ms": 269711296797.2521 }, "end": { "local": "1978-07-19T22:06:15+05:00", "utc": "1978-07-19T17:06:15Z", "ms": 269715975066.10788 } }, "covered_min": 78, "window_min": 78, "qualifies": true }, { "local_date": "1978-07-20", "window": { "start": { "local": "1978-07-20T20:47:42+05:00", "utc": "1978-07-20T15:47:42Z", "ms": 269797662086.23077 }, "end": { "local": "1978-07-20T22:05:51+05:00", "utc": "1978-07-20T17:05:51Z", "ms": 269802350620.18393 } }, "covered_min": 0, "window_min": 78, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul.", "fact": "1978-07-19T07:01:44Z → 1978-07-20T03:04:49Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:48–22:06 on the 19th, 20:48–22:06 on the 20th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 78 of 78 minutes on the 19th and 0 of 78 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 31592 s" }, { "step": "ruling", "text": "Śiva Śayanotsava, Tehran, 1978: Wednesday 19 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shiva-shayanotsava", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-19", "confidence": "determinate" } ], "quote": "In Tehran, Śiva Śayanotsava 1978 falls on Wednesday 19 July. Pūrṇimā runs from 12:02 on Wed 19 Jul to 08:05 on Thu 20 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/shiva-shayanotsava", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ashunya-shayana-vrata-ashadha", "festival": "ashunya-shayana-vrata-ashadha", "name": "Aśūnya Śayana Vrata (Āṣāḍha)", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10344, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1978-07-21T04:12:32+05:00", "utc": "1978-07-20T23:12:32Z", "ms": 269824352018.03912 }, "end": { "local": "1978-07-22T00:35:49+05:00", "utc": "1978-07-21T19:35:49Z", "ms": 269897748625.41782 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-07-21T04:12:32+05:00", "utc": "1978-07-20T23:12:32Z", "ms": 269824352018.03912 }, "end": { "local": "1978-07-22T00:35:49+05:00", "utc": "1978-07-21T19:35:49Z", "ms": 269897748625.41782 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-07-20", "window": { "start": { "local": "1978-07-20T20:55:21+05:00", "utc": "1978-07-20T15:55:21Z", "ms": 269798120606.1485 }, "end": { "local": "1978-07-20T20:55:21+05:00", "utc": "1978-07-20T15:55:21Z", "ms": 269798120606.1485 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-07-21", "window": { "start": { "local": "1978-07-21T21:43:24+05:00", "utc": "1978-07-21T16:43:24Z", "ms": 269887404231.55273 }, "end": { "local": "1978-07-21T21:43:24+05:00", "utc": "1978-07-21T16:43:24Z", "ms": 269887404231.55273 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 04:13 on Fri 21 Jul to 00:36 on Sat 22 Jul.", "fact": "1978-07-20T23:12:32Z → 1978-07-21T19:35:49Z" }, { "step": "kaala", "text": "Moonrise is at 20:55 on the 20th and 21:43 on the 21st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā must be current at moonrise. It is not on the 20th and is on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 10344 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata (Āṣāḍha), Tehran, 1978: Friday 21 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ashunya-shayana-vrata-ashadha", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 2 Asunya sayana vrata (candrodaya vyapini; purvahna vyapini and purvaviddha in Bengal)." } ], "not_evaluated": "In Bengal the row reads pūrvāhṇa and pūrvaviddha; that reading is not applied.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-21", "confidence": "determinate" } ], "quote": "In Tehran, Aśūnya Śayana Vrata (Āṣāḍha) 1978 falls on Friday 21 July. Dvitīyā runs from 04:13 on Fri 21 Jul to 00:36 on Sat 22 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ashunya-shayana-vrata-ashadha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-07-22", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3707, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-07-22T21:24:51+05:00", "utc": "1978-07-22T16:24:51Z", "ms": 269972690787.52625 }, "end": { "local": "1978-07-23T18:48:33+05:00", "utc": "1978-07-23T13:48:33Z", "ms": 270049712808.0915 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-07-22T21:24:51+05:00", "utc": "1978-07-22T16:24:51Z", "ms": 269972690787.52625 }, "end": { "local": "1978-07-23T18:48:33+05:00", "utc": "1978-07-23T13:48:33Z", "ms": 270049712808.0915 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-07-22", "window": { "start": { "local": "1978-07-22T22:26:38+05:00", "utc": "1978-07-22T17:26:38Z", "ms": 269976397716.66962 }, "end": { "local": "1978-07-22T22:26:38+05:00", "utc": "1978-07-22T17:26:38Z", "ms": 269976397716.66962 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-07-23", "window": { "start": { "local": "1978-07-23T23:06:14+05:00", "utc": "1978-07-23T18:06:14Z", "ms": 270065174149.44205 }, "end": { "local": "1978-07-23T23:06:14+05:00", "utc": "1978-07-23T18:06:14Z", "ms": 270065174149.44205 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:25 on Sat 22 Jul to 18:49 on Sun 23 Jul.", "fact": "1978-07-22T16:24:51Z → 1978-07-23T13:48:33Z" }, { "step": "kaala", "text": "Moonrise is at 22:27 on the 22nd and 23:06 on the 23rd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 22nd and is not on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 3707 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Saturday 22 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-22", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Saturday 22 July. Caturthī runs from 21:25 on Sat 22 Jul to 18:49 on Sun 23 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-07-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-07-30", "festival": "ekadashi", "name": "Kāmikā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-07-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36533, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-07-29T18:30:44+05:00", "utc": "1978-07-29T13:30:44Z", "ms": 270567044132.85562 }, "end": { "local": "1978-07-30T20:32:19+05:00", "utc": "1978-07-30T15:32:19Z", "ms": 270660738723.32495 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-07-29T18:30:44+05:00", "utc": "1978-07-29T13:30:44Z", "ms": 270567044132.85562 }, "end": { "local": "1978-07-30T20:32:19+05:00", "utc": "1978-07-30T15:32:19Z", "ms": 270660738723.32495 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-07-30", "window": { "start": { "local": "1978-07-30T06:40:26+05:00", "utc": "1978-07-30T01:40:26Z", "ms": 270610825952.20456 }, "end": { "local": "1978-07-30T06:40:26+05:00", "utc": "1978-07-30T01:40:26Z", "ms": 270610825952.20456 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-07-31", "window": { "start": { "local": "1978-07-31T06:41:12+05:00", "utc": "1978-07-31T01:41:12Z", "ms": 270697272010.872 }, "end": { "local": "1978-07-31T06:41:12+05:00", "utc": "1978-07-31T01:41:12Z", "ms": 270697272010.872 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:31 on Sat 29 Jul to 20:32 on Sun 30 Jul.", "fact": "1978-07-29T13:30:44Z → 1978-07-30T15:32:19Z" }, { "step": "kaala", "text": "Sunrise is at 06:40 on the 30th and 06:41 on the 31st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 30th and is not on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 36533 s" }, { "step": "ruling", "text": "Kāmikā Ekādaśī, Tehran, 1978: Sunday 30 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-07-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-07-30", "confidence": "determinate" } ], "quote": "In Tehran, Kāmikā Ekādaśī 1978 falls on Sunday 30 July. Ekādaśī runs from 18:31 on Sat 29 Jul to 20:32 on Sun 30 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-07-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-08-01", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2961, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-07-31T22:49:17+05:00", "utc": "1978-07-31T17:49:17Z", "ms": 270755357245.88165 }, "end": { "local": "1978-08-02T01:13:51+05:00", "utc": "1978-08-01T20:13:51Z", "ms": 270850430554.01236 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-07-31T22:49:17+05:00", "utc": "1978-07-31T17:49:17Z", "ms": 270755357245.88165 }, "end": { "local": "1978-08-02T01:13:51+05:00", "utc": "1978-08-01T20:13:51Z", "ms": 270850430554.01236 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-07-31", "window": { "start": { "local": "1978-07-31T20:39:38+05:00", "utc": "1978-07-31T15:39:38Z", "ms": 270747577756.5613 }, "end": { "local": "1978-07-31T21:59:56+05:00", "utc": "1978-07-31T16:59:56Z", "ms": 270752396494.35327 } }, "covered_min": 0, "window_min": 80, "qualifies": false }, { "local_date": "1978-08-01", "window": { "start": { "local": "1978-08-01T20:38:45+05:00", "utc": "1978-08-01T15:38:45Z", "ms": 270833924943.16064 }, "end": { "local": "1978-08-01T21:59:17+05:00", "utc": "1978-08-01T16:59:17Z", "ms": 270838756919.06586 } }, "covered_min": 81, "window_min": 81, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 22:49 on Mon 31 Jul to 01:14 on Wed 2 Aug.", "fact": "1978-07-31T17:49:17Z → 1978-08-01T20:13:51Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:40–22:00 on the 31st, 20:39–21:59 on the 1st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 80 minutes on the 31st and 81 of 81 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 2961 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Tuesday 1 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-01", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Tuesday 1 August. Trayodaśī runs from 22:49 on Mon 31 Jul to 01:14 on Wed 2 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-08-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-08-01", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-01", "confidence": "boundary", "boundary_reasons": [ "margin", "tie-break-unstated" ], "boundary_margin_s": 174, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-08-02T01:13:51+05:00", "utc": "1978-08-01T20:13:51Z", "ms": 270850430554.01236 }, "end": { "local": "1978-08-03T03:39:27+05:00", "utc": "1978-08-02T22:39:27Z", "ms": 270945566739.54364 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-02T01:13:51+05:00", "utc": "1978-08-01T20:13:51Z", "ms": 270850430554.01236 }, "end": { "local": "1978-08-03T03:39:27+05:00", "utc": "1978-08-02T22:39:27Z", "ms": 270945566739.54364 } }, "kaala": "nishita", "days": [ { "local_date": "1978-08-01", "window": { "start": { "local": "1978-08-02T01:16:45+05:00", "utc": "1978-08-01T20:16:45Z", "ms": 270850604852.80518 }, "end": { "local": "1978-08-02T02:04:45+05:00", "utc": "1978-08-01T21:04:45Z", "ms": 270853484852.80518 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-02", "window": { "start": { "local": "1978-08-03T01:16:41+05:00", "utc": "1978-08-02T20:16:41Z", "ms": 270937001078.9831 }, "end": { "local": "1978-08-03T02:04:41+05:00", "utc": "1978-08-02T21:04:41Z", "ms": 270939881078.9831 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 01:14 on Wed 2 Aug to 03:39 on Thu 3 Aug.", "fact": "1978-08-01T20:13:51Z → 1978-08-02T22:39:27Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 01:17–02:05 on the 1st, 01:17–02:05 on the 2nd.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 1st and 48 of 48 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Both nights qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 174 s < 300 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Tuesday 1 August.", "fact": "confidence: boundary (margin, tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-01", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-02", "confidence": "boundary" } ], "quote": "In Tehran, Śivarātri 1978 falls on Tuesday 1 August. Caturdaśī runs from 01:14 on Wed 2 Aug to 03:39 on Thu 3 Aug and covers all of niśītha that night. It also reaches the next night for 48 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 2 min 54 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-08-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/madhusrava-tritiya", "festival": "madhusrava-tritiya", "name": "Madhusravā Tṛtīyā", "everyday": "Hariyali Teej", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5066, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-08-06T09:11:31+04:00", "utc": "1978-08-06T05:11:31Z", "ms": 271228291325.5372 }, "end": { "local": "1978-08-07T10:51:24+04:00", "utc": "1978-08-07T06:51:24Z", "ms": 271320683625.58447 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-06T09:11:31+04:00", "utc": "1978-08-06T05:11:31Z", "ms": 271228291325.5372 }, "end": { "local": "1978-08-07T10:51:24+04:00", "utc": "1978-08-07T06:51:24Z", "ms": 271320683625.58447 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-06", "window": { "start": { "local": "1978-08-06T12:15:56+04:00", "utc": "1978-08-06T08:15:56Z", "ms": 271239356389.44403 }, "end": { "local": "1978-08-06T13:03:56+04:00", "utc": "1978-08-06T09:03:56Z", "ms": 271242236389.44403 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-07", "window": { "start": { "local": "1978-08-07T12:15:50+04:00", "utc": "1978-08-07T08:15:50Z", "ms": 271325749556.62527 }, "end": { "local": "1978-08-07T13:03:50+04:00", "utc": "1978-08-07T09:03:50Z", "ms": 271328629556.62527 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 09:12 on Sun 6 Aug to 10:51 on Mon 7 Aug.", "fact": "1978-08-06T05:11:31Z → 1978-08-07T06:51:24Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:16–13:04 on the 6th, 12:16–13:04 on the 7th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 6th and 0 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 5066 s" }, { "step": "ruling", "text": "Madhusravā Tṛtīyā, Tehran, 1978: Sunday 6 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "madhusrava-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Madhusrava (Gujerat) (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-06", "confidence": "determinate" } ], "quote": "In Tehran, Madhusravā Tṛtīyā (Hariyali Teej) 1978 falls on Sunday 6 August. Tṛtīyā runs from 09:12 on Sun 6 Aug to 10:51 on Mon 7 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/madhusrava-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-08-07", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 518, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-08-07T10:51:24+04:00", "utc": "1978-08-07T06:51:24Z", "ms": 271320683625.58447 }, "end": { "local": "1978-08-08T12:07:04+04:00", "utc": "1978-08-08T08:07:04Z", "ms": 271411624397.272 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-07T10:51:24+04:00", "utc": "1978-08-07T06:51:24Z", "ms": 271320683625.58447 }, "end": { "local": "1978-08-08T12:07:04+04:00", "utc": "1978-08-08T08:07:04Z", "ms": 271411624397.272 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-07", "window": { "start": { "local": "1978-08-07T12:15:50+04:00", "utc": "1978-08-07T08:15:50Z", "ms": 271325749556.62527 }, "end": { "local": "1978-08-07T13:03:50+04:00", "utc": "1978-08-07T09:03:50Z", "ms": 271328629556.62527 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-08", "window": { "start": { "local": "1978-08-08T12:15:42+04:00", "utc": "1978-08-08T08:15:42Z", "ms": 271412142128.52917 }, "end": { "local": "1978-08-08T13:03:42+04:00", "utc": "1978-08-08T09:03:42Z", "ms": 271415022128.52917 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:51 on Mon 7 Aug to 12:07 on Tue 8 Aug.", "fact": "1978-08-07T06:51:24Z → 1978-08-08T08:07:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:16–13:04 on the 7th, 12:16–13:04 on the 8th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 7th and 0 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 518 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Monday 7 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-07", "confidence": "boundary" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Monday 7 August. Caturthī runs from 10:51 on Mon 7 Aug to 12:07 on Tue 8 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-08-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/naga-panchami", "festival": "naga-panchami", "name": "Nāga Pañcamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 518, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-08-08T12:07:04+04:00", "utc": "1978-08-08T08:07:04Z", "ms": 271411624397.272 }, "end": { "local": "1978-08-09T12:52:53+04:00", "utc": "1978-08-09T08:52:53Z", "ms": 271500773499.4641 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-08T12:07:04+04:00", "utc": "1978-08-08T08:07:04Z", "ms": 271411624397.272 }, "end": { "local": "1978-08-09T12:52:53+04:00", "utc": "1978-08-09T08:52:53Z", "ms": 271500773499.4641 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-08", "window": { "start": { "local": "1978-08-08T12:15:42+04:00", "utc": "1978-08-08T08:15:42Z", "ms": 271412142128.52917 }, "end": { "local": "1978-08-08T13:03:42+04:00", "utc": "1978-08-08T09:03:42Z", "ms": 271415022128.52917 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-09", "window": { "start": { "local": "1978-08-09T12:15:34+04:00", "utc": "1978-08-09T08:15:34Z", "ms": 271498534107.18295 }, "end": { "local": "1978-08-09T13:03:34+04:00", "utc": "1978-08-09T09:03:34Z", "ms": 271501414107.18295 } }, "covered_min": 37, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 12:07 on Tue 8 Aug to 12:53 on Wed 9 Aug.", "fact": "1978-08-08T08:07:04Z → 1978-08-09T08:52:53Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:16–13:04 on the 8th, 12:16–13:04 on the 9th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 48 of 48 minutes on the 8th and 37 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Both middays qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 518 s" }, { "step": "ruling", "text": "Nāga Pañcamī, Tehran, 1978: Wednesday 9 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "naga-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Naga pancami (paraviddha)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-09", "confidence": "determinate" } ], "quote": "In Tehran, Nāga Pañcamī 1978 falls on Wednesday 9 August. Pañcamī runs from 12:07 on Tue 8 Aug to 12:53 on Wed 9 Aug and covers 37 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.", "cite": "https://ahargana.org/tehran/festivals/1978/naga-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-08-14", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4897, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-08-14T07:13:46+04:00", "utc": "1978-08-14T03:13:46Z", "ms": 271912425615.4865 }, "end": { "local": "1978-08-15T04:18:05+04:00", "utc": "1978-08-15T00:18:05Z", "ms": 271988285419.09244 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-14T07:13:46+04:00", "utc": "1978-08-14T03:13:46Z", "ms": 271912425615.4865 }, "end": { "local": "1978-08-15T04:18:05+04:00", "utc": "1978-08-15T00:18:05Z", "ms": 271988285419.09244 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-08-14", "window": { "start": { "local": "1978-08-14T05:52:09+04:00", "utc": "1978-08-14T01:52:09Z", "ms": 271907528837.31967 }, "end": { "local": "1978-08-14T05:52:09+04:00", "utc": "1978-08-14T01:52:09Z", "ms": 271907528837.31967 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-08-15", "window": { "start": { "local": "1978-08-15T05:52:56+04:00", "utc": "1978-08-15T01:52:56Z", "ms": 271993975805.01767 }, "end": { "local": "1978-08-15T05:52:56+04:00", "utc": "1978-08-15T01:52:56Z", "ms": 271993975805.01767 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 07:14 on Mon 14 Aug to 04:18 on Tue 15 Aug.", "fact": "1978-08-14T03:13:46Z → 1978-08-15T00:18:05Z" }, { "step": "kaala", "text": "Sunrise is at 05:52 on the 14th and 05:53 on the 15th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 14th and is not on the 15th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Neither sunrise qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 4897 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Tehran, 1978: Monday 14 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-14", "confidence": "determinate" } ], "quote": "In Tehran, Putradā Ekādaśī 1978 falls on Monday 14 August. Ekādaśī runs from 07:14 on Mon 14 Aug to 04:18 on Tue 15 Aug, and is current at sunrise on neither day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-08-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/damodara-dvadashi", "festival": "damodara-dvadashi", "name": "Dāmodara Dvādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28588, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-08-15T04:18:05+04:00", "utc": "1978-08-15T00:18:05Z", "ms": 271988285419.09244 }, "end": { "local": "1978-08-16T00:59:06+04:00", "utc": "1978-08-15T20:59:06Z", "ms": 272062745650.47678 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-15T04:18:05+04:00", "utc": "1978-08-15T00:18:05Z", "ms": 271988285419.09244 }, "end": { "local": "1978-08-16T00:59:06+04:00", "utc": "1978-08-15T20:59:06Z", "ms": 272062745650.47678 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-15", "window": { "start": { "local": "1978-08-15T12:14:34+04:00", "utc": "1978-08-15T08:14:34Z", "ms": 272016873784.15973 }, "end": { "local": "1978-08-15T13:02:34+04:00", "utc": "1978-08-15T09:02:34Z", "ms": 272019753784.15973 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-16", "window": { "start": { "local": "1978-08-16T12:14:22+04:00", "utc": "1978-08-16T08:14:22Z", "ms": 272103261771.91534 }, "end": { "local": "1978-08-16T13:02:22+04:00", "utc": "1978-08-16T09:02:22Z", "ms": 272106141771.91534 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 04:18 on Tue 15 Aug to 00:59 on Wed 16 Aug.", "fact": "1978-08-15T00:18:05Z → 1978-08-15T20:59:06Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:15–13:03 on the 15th, 12:14–13:02 on the 16th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 15th and 0 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 28588 s" }, { "step": "ruling", "text": "Dāmodara Dvādaśī, Tehran, 1978: Tuesday 15 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "damodara-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Buddha dvadasi, Damodara dvadasi (purvaviddha), Visnu-pavitraropana." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-15", "confidence": "determinate" } ], "quote": "In Tehran, Dāmodara Dvādaśī 1978 falls on Tuesday 15 August. Dvādaśī runs from 04:18 on Tue 15 Aug to 00:59 on Wed 16 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/damodara-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-08-16", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2302, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-08-16T00:59:06+04:00", "utc": "1978-08-15T20:59:06Z", "ms": 272062745650.47678 }, "end": { "local": "1978-08-16T21:25:35+04:00", "utc": "1978-08-16T17:25:35Z", "ms": 272136334917.24713 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-16T00:59:06+04:00", "utc": "1978-08-15T20:59:06Z", "ms": 272062745650.47678 }, "end": { "local": "1978-08-16T21:25:35+04:00", "utc": "1978-08-16T17:25:35Z", "ms": 272136334917.24713 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-08-15", "window": { "start": { "local": "1978-08-15T19:24:12+04:00", "utc": "1978-08-15T15:24:12Z", "ms": 272042651763.30182 }, "end": { "local": "1978-08-15T20:48:08+04:00", "utc": "1978-08-15T16:48:08Z", "ms": 272047687889.29254 } }, "covered_min": 0, "window_min": 84, "qualifies": false }, { "local_date": "1978-08-16", "window": { "start": { "local": "1978-08-16T19:23:01+04:00", "utc": "1978-08-16T15:23:01Z", "ms": 272128980835.59836 }, "end": { "local": "1978-08-16T20:47:13+04:00", "utc": "1978-08-16T16:47:13Z", "ms": 272134032663.19684 } }, "covered_min": 84, "window_min": 84, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 00:59 on Wed 16 Aug to 21:26 on Wed 16 Aug.", "fact": "1978-08-15T20:59:06Z → 1978-08-16T17:25:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:24–20:48 on the 15th, 19:23–20:47 on the 16th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 84 minutes on the 15th and 84 of 84 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 2302 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Wednesday 16 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-16", "confidence": "boundary" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Wednesday 16 August. Trayodaśī runs from 00:59 on Wed 16 Aug to 21:26 on Wed 16 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-08-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/raksha-bandhana", "festival": "raksha-bandhana", "name": "Rakṣā Bandhana", "everyday": "Rakhi", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-18", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 6957, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-08-17T17:47:12+04:00", "utc": "1978-08-17T13:47:12Z", "ms": 272209631990.73373 }, "end": { "local": "1978-08-18T14:13:59+04:00", "utc": "1978-08-18T10:13:59Z", "ms": 272283239296.87036 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "second-half", "start": { "local": "1978-08-18T03:59:19+04:00", "utc": "1978-08-17T23:59:19Z", "ms": 272246358966.74246 }, "end": { "local": "1978-08-18T14:13:59+04:00", "utc": "1978-08-18T10:13:59Z", "ms": 272283239296.87036 } }, "kaala": "day", "days": [ { "local_date": "1978-08-17", "window": { "start": { "local": "1978-08-17T05:54:30+04:00", "utc": "1978-08-17T01:54:30Z", "ms": 272166869542.58698 }, "end": { "local": "1978-08-18T05:55:16+04:00", "utc": "1978-08-18T01:55:16Z", "ms": 272253316306.09796 } }, "covered_min": 116, "window_min": 1441, "qualifies": true }, { "local_date": "1978-08-18", "window": { "start": { "local": "1978-08-18T05:55:16+04:00", "utc": "1978-08-18T01:55:16Z", "ms": 272253316306.09796 }, "end": { "local": "1978-08-19T05:56:03+04:00", "utc": "1978-08-19T01:56:03Z", "ms": 272339762998.71075 } }, "covered_min": 499, "window_min": 1441, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 17:47 on Thu 17 Aug to 14:14 on Fri 18 Aug. Its second half begins at 03:59 on Fri 18 Aug.", "fact": "1978-08-17T13:47:12Z → 1978-08-18T10:13:59Z · second half from 1978-08-17T23:59:19Z" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 05:54 on the 17th, and from 05:55 on the 18th.", "fact": "day: sunrise-to-sunrise · sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The second half of Pūrṇimā must be present during the day. It covers 116 of 1441 minutes on the 17th and 499 of 1441 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Both days qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 6957 s" }, { "step": "ruling", "text": "Rakṣā Bandhana, Tehran, 1978: Friday 18 August.", "fact": "confidence: boundary (tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "raksha-bandhana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Rakhi purnima, Naroli purnima (Cocoanut day), Raksa Bandhana (in the second half of purnima), Rsi tarpana (madhyahna vyapini), Hayagriva utpatti, Jhulanayatra samapana" } ], "kaala": "day", "priority": "unstated", "when_absent": "unstated", "half": "second" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-18", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-18", "confidence": "boundary" } ], "quote": "In Tehran, Rakṣā Bandhana (Rakhi) 1978 falls on Friday 18 August. The second half of Pūrṇimā runs from 03:59 on Fri 18 Aug to 14:14 on Fri 18 Aug and falls on two days: 499 minutes of it on the 18th, 116 on the 17th; the rule does not say which to take, and the day that holds more of it is ruled: treat the date as contested.", "cite": "https://ahargana.org/tehran/festivals/1978/raksha-bandhana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rishi-tarpana", "festival": "rishi-tarpana", "name": "Ṛṣi Tarpaṇa", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4323, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-08-17T17:47:12+04:00", "utc": "1978-08-17T13:47:12Z", "ms": 272209631990.73373 }, "end": { "local": "1978-08-18T14:13:59+04:00", "utc": "1978-08-18T10:13:59Z", "ms": 272283239296.87036 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1978-08-17T17:47:12+04:00", "utc": "1978-08-17T13:47:12Z", "ms": 272209631990.73373 }, "end": { "local": "1978-08-18T14:13:59+04:00", "utc": "1978-08-18T10:13:59Z", "ms": 272283239296.87036 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-17", "window": { "start": { "local": "1978-08-17T12:14:09+04:00", "utc": "1978-08-17T08:14:09Z", "ms": 272189649231.01364 }, "end": { "local": "1978-08-17T13:02:09+04:00", "utc": "1978-08-17T09:02:09Z", "ms": 272192529231.01364 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-08-18", "window": { "start": { "local": "1978-08-18T12:13:56+04:00", "utc": "1978-08-18T08:13:56Z", "ms": 272276036176.51962 }, "end": { "local": "1978-08-18T13:01:56+04:00", "utc": "1978-08-18T09:01:56Z", "ms": 272278916176.51962 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 17:47 on Thu 17 Aug to 14:14 on Fri 18 Aug.", "fact": "1978-08-17T13:47:12Z → 1978-08-18T10:13:59Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:14–13:02 on the 17th, 12:14–13:02 on the 18th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 17th and 48 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 4323 s" }, { "step": "ruling", "text": "Ṛṣi Tarpaṇa, Tehran, 1978: Friday 18 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rishi-tarpana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Rakhi purnima, Naroli purnima (Cocoanut day), Raksa Bandhana (in the second half of purnima), Rsi tarpana (madhyahna vyapini), Hayagriva utpatti, Jhulanayatra samapana" } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-18", "confidence": "determinate" } ], "quote": "In Tehran, Ṛṣi Tarpaṇa 1978 falls on Friday 18 August. Pūrṇimā runs from 17:47 on Thu 17 Aug to 14:14 on Fri 18 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/rishi-tarpana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ashunya-shayana-vrata", "festival": "ashunya-shayana-vrata", "name": "Aśūnya Śayana Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32574, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1978-08-19T10:55:58+04:00", "utc": "1978-08-19T06:55:58Z", "ms": 272357758180.45053 }, "end": { "local": "1978-08-20T08:02:43+04:00", "utc": "1978-08-20T04:02:43Z", "ms": 272433763221.83154 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-19T10:55:58+04:00", "utc": "1978-08-19T06:55:58Z", "ms": 272357758180.45053 }, "end": { "local": "1978-08-20T08:02:43+04:00", "utc": "1978-08-20T04:02:43Z", "ms": 272433763221.83154 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-08-19", "window": { "start": { "local": "1978-08-19T19:58:52+04:00", "utc": "1978-08-19T15:58:52Z", "ms": 272390332215.9444 }, "end": { "local": "1978-08-19T19:58:52+04:00", "utc": "1978-08-19T15:58:52Z", "ms": 272390332215.9444 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-08-20", "window": { "start": { "local": "1978-08-20T20:38:16+04:00", "utc": "1978-08-20T16:38:16Z", "ms": 272479096176.11438 }, "end": { "local": "1978-08-20T20:38:16+04:00", "utc": "1978-08-20T16:38:16Z", "ms": 272479096176.11438 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 10:56 on Sat 19 Aug to 08:03 on Sun 20 Aug.", "fact": "1978-08-19T06:55:58Z → 1978-08-20T04:02:43Z" }, { "step": "kaala", "text": "Moonrise is at 19:59 on the 19th and 20:38 on the 20th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā must be current at moonrise. It is on the 19th and is not on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 32574 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata, Tehran, 1978: Saturday 19 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ashunya-shayana-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 2 Asunyasayana vrata (Dvitiya current at moonrise; if occurs on two successive days, it is to be observed on the second day)." } ], "kaala": "moonrise", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-19", "confidence": "determinate" } ], "quote": "In Tehran, Aśūnya Śayana Vrata 1978 falls on Saturday 19 August. Dvitīyā runs from 10:56 on Sat 19 Aug to 08:03 on Sun 20 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ashunya-shayana-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/kajjali-tritiya", "festival": "kajjali-tritiya", "name": "Kajjalī Tṛtīyā", "everyday": "Kajari Teej", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15045, "anga": { "type": "tithi", "index": 17, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-08-20T08:02:43+04:00", "utc": "1978-08-20T04:02:43Z", "ms": 272433763221.83154 }, "end": { "local": "1978-08-21T05:42:53+04:00", "utc": "1978-08-21T01:42:53Z", "ms": 272511772553.16772 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-20T08:02:43+04:00", "utc": "1978-08-20T04:02:43Z", "ms": 272433763221.83154 }, "end": { "local": "1978-08-21T05:42:53+04:00", "utc": "1978-08-21T01:42:53Z", "ms": 272511772553.16772 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-20", "window": { "start": { "local": "1978-08-20T12:13:29+04:00", "utc": "1978-08-20T08:13:29Z", "ms": 272448808591.58704 }, "end": { "local": "1978-08-20T13:01:29+04:00", "utc": "1978-08-20T09:01:29Z", "ms": 272451688591.58704 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-21", "window": { "start": { "local": "1978-08-21T12:13:14+04:00", "utc": "1978-08-21T08:13:14Z", "ms": 272535194094.33844 }, "end": { "local": "1978-08-21T13:01:14+04:00", "utc": "1978-08-21T09:01:14Z", "ms": 272538074094.33844 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 08:03 on Sun 20 Aug to 05:43 on Mon 21 Aug.", "fact": "1978-08-20T04:02:43Z → 1978-08-21T01:42:53Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 20th, 12:13–13:01 on the 21st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 20th and 0 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 15045 s" }, { "step": "ruling", "text": "Kajjalī Tṛtīyā, Tehran, 1978: Sunday 20 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "kajjali-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 3 Kajjali trtiya, (paraviddha), Angaveta trtiya (Orissa)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-20", "confidence": "determinate" } ], "quote": "In Tehran, Kajjalī Tṛtīyā (Kajari Teej) 1978 falls on Sunday 20 August. Tṛtīyā runs from 08:03 on Sun 20 Aug to 05:43 on Mon 21 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/kajjali-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/bahula-chaturthi", "festival": "bahula-chaturthi", "name": "Bahulā Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31600, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-08-21T05:42:53+04:00", "utc": "1978-08-21T01:42:53Z", "ms": 272511772553.16772 }, "end": { "local": "1978-08-22T04:03:32+04:00", "utc": "1978-08-22T00:03:32Z", "ms": 272592212130.9719 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-21T05:42:53+04:00", "utc": "1978-08-21T01:42:53Z", "ms": 272511772553.16772 }, "end": { "local": "1978-08-22T04:03:32+04:00", "utc": "1978-08-22T00:03:32Z", "ms": 272592212130.9719 } }, "kaala": "sayahna", "days": [ { "local_date": "1978-08-20", "window": { "start": { "local": "1978-08-20T16:37:52+04:00", "utc": "1978-08-20T12:37:52Z", "ms": 272464671973.60126 }, "end": { "local": "1978-08-20T19:18:08+04:00", "utc": "1978-08-20T15:18:08Z", "ms": 272474287561.61075 } }, "covered_min": 0, "window_min": 160, "qualifies": false }, { "local_date": "1978-08-21", "window": { "start": { "local": "1978-08-21T16:37:01+04:00", "utc": "1978-08-21T12:37:01Z", "ms": 272551020845.23407 }, "end": { "local": "1978-08-21T19:16:52+04:00", "utc": "1978-08-21T15:16:52Z", "ms": 272560612012.49783 } }, "covered_min": 160, "window_min": 160, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:43 on Mon 21 Aug to 04:04 on Tue 22 Aug.", "fact": "1978-08-21T01:42:53Z → 1978-08-22T00:03:32Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:38–19:18 on the 20th, 16:37–19:17 on the 21st.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during sāyāhna. It covers 0 of 160 minutes on the 20th and 160 of 160 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one late afternoon qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 31600 s" }, { "step": "ruling", "text": "Bahulā Caturthī, Tehran, 1978: Monday 21 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bahula-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 4 Bahula caturthi (Madhyadesa) (Sayahnavyapini: if occurs on two successive days, it is to be observed on the 1st day)." } ], "kaala": "sayahna", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-21", "confidence": "determinate" } ], "quote": "In Tehran, Bahulā Caturthī 1978 falls on Monday 21 August. Caturthī runs from 05:43 on Mon 21 Aug to 04:04 on Tue 22 Aug and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/tehran/festivals/1978/bahula-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-08-21", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24446, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-08-21T05:42:53+04:00", "utc": "1978-08-21T01:42:53Z", "ms": 272511772553.16772 }, "end": { "local": "1978-08-22T04:03:32+04:00", "utc": "1978-08-22T00:03:32Z", "ms": 272592212130.9719 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-21T05:42:53+04:00", "utc": "1978-08-21T01:42:53Z", "ms": 272511772553.16772 }, "end": { "local": "1978-08-22T04:03:32+04:00", "utc": "1978-08-22T00:03:32Z", "ms": 272592212130.9719 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-08-20", "window": { "start": { "local": "1978-08-20T20:38:16+04:00", "utc": "1978-08-20T16:38:16Z", "ms": 272479096176.11438 }, "end": { "local": "1978-08-20T20:38:16+04:00", "utc": "1978-08-20T16:38:16Z", "ms": 272479096176.11438 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-08-21", "window": { "start": { "local": "1978-08-21T21:16:07+04:00", "utc": "1978-08-21T17:16:07Z", "ms": 272567766564.26486 }, "end": { "local": "1978-08-21T21:16:07+04:00", "utc": "1978-08-21T17:16:07Z", "ms": 272567766564.26486 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:43 on Mon 21 Aug to 04:04 on Tue 22 Aug.", "fact": "1978-08-21T01:42:53Z → 1978-08-22T00:03:32Z" }, { "step": "kaala", "text": "Moonrise is at 20:38 on the 20th and 21:16 on the 21st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 20th and is on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 24446 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Monday 21 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-21", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Monday 21 August. Caturthī runs from 05:43 on Mon 21 Aug to 04:04 on Tue 22 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-08-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/hala-shashthi", "festival": "hala-shashthi", "name": "Hala Ṣaṣṭhī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32589, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-08-23T03:09:35+04:00", "utc": "1978-08-22T23:09:35Z", "ms": 272675374570.75348 }, "end": { "local": "1978-08-24T03:02:58+04:00", "utc": "1978-08-23T23:02:58Z", "ms": 272761377541.68652 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-23T03:09:35+04:00", "utc": "1978-08-22T23:09:35Z", "ms": 272675374570.75348 }, "end": { "local": "1978-08-24T03:02:58+04:00", "utc": "1978-08-23T23:02:58Z", "ms": 272761377541.68652 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-23", "window": { "start": { "local": "1978-08-23T12:12:44+04:00", "utc": "1978-08-23T08:12:44Z", "ms": 272707963771.1056 }, "end": { "local": "1978-08-23T13:00:44+04:00", "utc": "1978-08-23T09:00:44Z", "ms": 272710843771.1056 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-24", "window": { "start": { "local": "1978-08-24T12:12:28+04:00", "utc": "1978-08-24T08:12:28Z", "ms": 272794347975.7069 }, "end": { "local": "1978-08-24T13:00:28+04:00", "utc": "1978-08-24T09:00:28Z", "ms": 272797227975.7069 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 03:10 on Wed 23 Aug to 03:03 on Thu 24 Aug.", "fact": "1978-08-22T23:09:35Z → 1978-08-23T23:02:58Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 23rd, 12:12–13:00 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 23rd and 0 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 32589 s" }, { "step": "ruling", "text": "Hala Ṣaṣṭhī, Tehran, 1978: Wednesday 23 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "hala-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 6 Hala sasthi (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-23", "confidence": "determinate" } ], "quote": "In Tehran, Hala Ṣaṣṭhī 1978 falls on Wednesday 23 August. Ṣaṣṭhī runs from 03:10 on Wed 23 Aug to 03:03 on Thu 24 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/hala-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shitala-saptami", "festival": "shitala-saptami", "name": "Śītalā Saptamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30600, "anga": { "type": "tithi", "index": 21, "key": "saptami", "name": "Saptamī", "start": { "local": "1978-08-24T03:02:58+04:00", "utc": "1978-08-23T23:02:58Z", "ms": 272761377541.68652 }, "end": { "local": "1978-08-25T03:42:12+04:00", "utc": "1978-08-24T23:42:12Z", "ms": 272850131941.9948 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-24T03:02:58+04:00", "utc": "1978-08-23T23:02:58Z", "ms": 272761377541.68652 }, "end": { "local": "1978-08-25T03:42:12+04:00", "utc": "1978-08-24T23:42:12Z", "ms": 272850131941.9948 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-08-24", "window": { "start": { "local": "1978-08-24T12:12:28+04:00", "utc": "1978-08-24T08:12:28Z", "ms": 272794347975.7069 }, "end": { "local": "1978-08-24T13:00:28+04:00", "utc": "1978-08-24T09:00:28Z", "ms": 272797227975.7069 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-08-25", "window": { "start": { "local": "1978-08-25T12:12:12+04:00", "utc": "1978-08-25T08:12:12Z", "ms": 272880731777.229 }, "end": { "local": "1978-08-25T13:00:12+04:00", "utc": "1978-08-25T09:00:12Z", "ms": 272883611777.229 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 03:03 on Thu 24 Aug to 03:42 on Fri 25 Aug.", "fact": "1978-08-23T23:02:58Z → 1978-08-24T23:42:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:12–13:00 on the 24th, 12:12–13:00 on the 25th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 48 of 48 minutes on the 24th and 0 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 30600 s" }, { "step": "ruling", "text": "Śītalā Saptamī, Tehran, 1978: Thursday 24 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shitala-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 7 Sitala saptami (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-24", "confidence": "determinate" } ], "quote": "In Tehran, Śītalā Saptamī 1978 falls on Thursday 24 August. Saptamī runs from 03:03 on Thu 24 Aug to 03:42 on Fri 25 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/shitala-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/janmashtami", "festival": "janmashtami", "name": "Janmāṣṭamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9681, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-08-25T03:42:12+04:00", "utc": "1978-08-24T23:42:12Z", "ms": 272850131941.9948 }, "end": { "local": "1978-08-26T05:02:13+04:00", "utc": "1978-08-26T01:02:13Z", "ms": 272941333434.27426 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-25T03:42:12+04:00", "utc": "1978-08-24T23:42:12Z", "ms": 272850131941.9948 }, "end": { "local": "1978-08-26T05:02:13+04:00", "utc": "1978-08-26T01:02:13Z", "ms": 272941333434.27426 } }, "kaala": "nishita", "days": [ { "local_date": "1978-08-24", "window": { "start": { "local": "1978-08-25T00:12:51+04:00", "utc": "1978-08-24T20:12:51Z", "ms": 272837571119.96747 }, "end": { "local": "1978-08-25T01:00:51+04:00", "utc": "1978-08-24T21:00:51Z", "ms": 272840451119.96747 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-08-25", "window": { "start": { "local": "1978-08-26T00:12:35+04:00", "utc": "1978-08-25T20:12:35Z", "ms": 272923954887.90894 }, "end": { "local": "1978-08-26T01:00:35+04:00", "utc": "1978-08-25T21:00:35Z", "ms": 272926834887.90894 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 03:42 on Fri 25 Aug to 05:02 on Sat 26 Aug.", "fact": "1978-08-24T23:42:12Z → 1978-08-26T01:02:13Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:13–01:01 on the 24th, 00:13–01:01 on the 25th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during niśītha. It covers 0 of 48 minutes on the 24th and 48 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 9681 s" }, { "step": "ruling", "text": "Janmāṣṭamī, Tehran, 1978: Friday 25 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "janmashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Janmastami (madhyaratra-vyapini), if midnight is covered on two days, or not on any day, it is to be observed on the 2nd day; special when combined with naksatra 'Rohini' at midnight, more so when on Monday or Wednesday. If the combination occurs before midnight and 'Rohini' extends up to midnight, it is to be observed on that day. Gokulastami." } ], "not_evaluated": "The clauses on Rohiṇī nakṣatra, the Vaiṣṇava observance on the day after saptamī, and the Assam and South India reckoning in the solar month belong to other readings and are not applied.", "kaala": "nishita", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-25", "confidence": "determinate" } ], "quote": "In Tehran, Janmāṣṭamī 1978 falls on Friday 25 August. Aṣṭamī runs from 03:42 on Fri 25 Aug to 05:02 on Sat 26 Aug and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/janmashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-08-29", "festival": "ekadashi", "name": "Ajā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11196, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-08-28T09:09:36+04:00", "utc": "1978-08-28T05:09:36Z", "ms": 273128976313.21118 }, "end": { "local": "1978-08-29T11:35:32+04:00", "utc": "1978-08-29T07:35:32Z", "ms": 273224132315.42996 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-28T09:09:36+04:00", "utc": "1978-08-28T05:09:36Z", "ms": 273128976313.21118 }, "end": { "local": "1978-08-29T11:35:32+04:00", "utc": "1978-08-29T07:35:32Z", "ms": 273224132315.42996 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-08-28", "window": { "start": { "local": "1978-08-28T06:03:00+04:00", "utc": "1978-08-28T02:03:00Z", "ms": 273117780189.2846 }, "end": { "local": "1978-08-28T06:03:00+04:00", "utc": "1978-08-28T02:03:00Z", "ms": 273117780189.2846 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-08-29", "window": { "start": { "local": "1978-08-29T06:03:46+04:00", "utc": "1978-08-29T02:03:46Z", "ms": 273204226206.42694 }, "end": { "local": "1978-08-29T06:03:46+04:00", "utc": "1978-08-29T02:03:46Z", "ms": 273204226206.42694 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 09:10 on Mon 28 Aug to 11:36 on Tue 29 Aug.", "fact": "1978-08-28T05:09:36Z → 1978-08-29T07:35:32Z" }, { "step": "kaala", "text": "Sunrise is at 06:03 on the 28th and 06:04 on the 29th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 28th and is on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 11196 s" }, { "step": "ruling", "text": "Ajā Ekādaśī, Tehran, 1978: Tuesday 29 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-29", "confidence": "determinate" } ], "quote": "In Tehran, Ajā Ekādaśī 1978 falls on Tuesday 29 August. Ekādaśī runs from 09:10 on Mon 28 Aug to 11:36 on Tue 29 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-08-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-08-30", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9769, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-08-30T14:02:11+04:00", "utc": "1978-08-30T10:02:11Z", "ms": 273319331348.94827 }, "end": { "local": "1978-08-31T16:20:47+04:00", "utc": "1978-08-31T12:20:47Z", "ms": 273414046850.46048 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-30T14:02:11+04:00", "utc": "1978-08-30T10:02:11Z", "ms": 273319331348.94827 }, "end": { "local": "1978-08-31T16:20:47+04:00", "utc": "1978-08-31T12:20:47Z", "ms": 273414046850.46048 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-08-30", "window": { "start": { "local": "1978-08-30T19:04:58+04:00", "utc": "1978-08-30T15:04:58Z", "ms": 273337498294.0259 }, "end": { "local": "1978-08-30T20:33:01+04:00", "utc": "1978-08-30T16:33:01Z", "ms": 273342780926.3368 } }, "covered_min": 88, "window_min": 88, "qualifies": true }, { "local_date": "1978-08-31", "window": { "start": { "local": "1978-08-31T19:03:36+04:00", "utc": "1978-08-31T15:03:36Z", "ms": 273423815758.98453 }, "end": { "local": "1978-08-31T20:31:56+04:00", "utc": "1978-08-31T16:31:56Z", "ms": 273429115504.49377 } }, "covered_min": 0, "window_min": 88, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 14:02 on Wed 30 Aug to 16:21 on Thu 31 Aug.", "fact": "1978-08-30T10:02:11Z → 1978-08-31T12:20:47Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:05–20:33 on the 30th, 19:04–20:32 on the 31st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 88 of 88 minutes on the 30th and 0 of 88 on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9769 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Wednesday 30 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-30", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Wednesday 30 August. Trayodaśī runs from 14:02 on Wed 30 Aug to 16:21 on Thu 31 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-08-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/aghora-chaturdashi", "festival": "aghora-chaturdashi", "name": "Aghora Caturdaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2257, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-08-31T16:20:47+04:00", "utc": "1978-08-31T12:20:47Z", "ms": 273414046850.46048 }, "end": { "local": "1978-09-01T18:24:36+04:00", "utc": "1978-09-01T14:24:36Z", "ms": 273507876029.09912 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-31T16:20:47+04:00", "utc": "1978-08-31T12:20:47Z", "ms": 273414046850.46048 }, "end": { "local": "1978-09-01T18:24:36+04:00", "utc": "1978-09-01T14:24:36Z", "ms": 273507876029.09912 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-08-31", "window": { "start": { "local": "1978-08-31T19:03:36+04:00", "utc": "1978-08-31T15:03:36Z", "ms": 273423815758.98453 }, "end": { "local": "1978-08-31T20:31:56+04:00", "utc": "1978-08-31T16:31:56Z", "ms": 273429115504.49377 } }, "covered_min": 88, "window_min": 88, "qualifies": true }, { "local_date": "1978-09-01", "window": { "start": { "local": "1978-09-01T19:02:13+04:00", "utc": "1978-09-01T15:02:13Z", "ms": 273510132676.94876 }, "end": { "local": "1978-09-01T20:30:50+04:00", "utc": "1978-09-01T16:30:50Z", "ms": 273515449599.82617 } }, "covered_min": 0, "window_min": 89, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 16:21 on Thu 31 Aug to 18:25 on Fri 1 Sep.", "fact": "1978-08-31T12:20:47Z → 1978-09-01T14:24:36Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:04–20:32 on the 31st, 19:02–20:31 on the 1st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 88 of 88 minutes on the 31st and 0 of 89 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 2257 s" }, { "step": "ruling", "text": "Aghora Caturdaśī, Tehran, 1978: Thursday 31 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "aghora-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Aghora caturdasi (pradosa vyapini)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-31", "confidence": "determinate" } ], "quote": "In Tehran, Aghora Caturdaśī 1978 falls on Thursday 31 August. Caturdaśī runs from 16:21 on Thu 31 Aug to 18:25 on Fri 1 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/aghora-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-08-31", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-08-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20755, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-08-31T16:20:47+04:00", "utc": "1978-08-31T12:20:47Z", "ms": 273414046850.46048 }, "end": { "local": "1978-09-01T18:24:36+04:00", "utc": "1978-09-01T14:24:36Z", "ms": 273507876029.09912 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-08-31T16:20:47+04:00", "utc": "1978-08-31T12:20:47Z", "ms": 273414046850.46048 }, "end": { "local": "1978-09-01T18:24:36+04:00", "utc": "1978-09-01T14:24:36Z", "ms": 273507876029.09912 } }, "kaala": "nishita", "days": [ { "local_date": "1978-08-31", "window": { "start": { "local": "1978-09-01T00:10:50+04:00", "utc": "1978-08-31T20:10:50Z", "ms": 273442249804.64426 }, "end": { "local": "1978-09-01T00:58:50+04:00", "utc": "1978-08-31T20:58:50Z", "ms": 273445129804.64426 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-09-01", "window": { "start": { "local": "1978-09-02T00:10:31+04:00", "utc": "1978-09-01T20:10:31Z", "ms": 273528631137.739 }, "end": { "local": "1978-09-02T00:58:31+04:00", "utc": "1978-09-01T20:58:31Z", "ms": 273531511137.739 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 16:21 on Thu 31 Aug to 18:25 on Fri 1 Sep.", "fact": "1978-08-31T12:20:47Z → 1978-09-01T14:24:36Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:11–00:59 on the 31st, 00:11–00:59 on the 1st.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 31st and 0 of 48 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 20755 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Thursday 31 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-08-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-08-31", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Thursday 31 August. Caturdaśī runs from 16:21 on Thu 31 Aug to 18:25 on Fri 1 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-08-31", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rudra-vrata", "festival": "rudra-vrata", "name": "Rudra Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25864, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1978-09-02T20:08:54+04:00", "utc": "1978-09-02T16:08:54Z", "ms": 273600533700.18982 }, "end": { "local": "1978-09-03T21:30:27+04:00", "utc": "1978-09-03T17:30:27Z", "ms": 273691826664.34488 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-02T20:08:54+04:00", "utc": "1978-09-02T16:08:54Z", "ms": 273600533700.18982 }, "end": { "local": "1978-09-03T21:30:27+04:00", "utc": "1978-09-03T17:30:27Z", "ms": 273691826664.34488 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-02", "window": { "start": { "local": "1978-09-02T12:09:49+04:00", "utc": "1978-09-02T08:09:49Z", "ms": 273571789336.20633 }, "end": { "local": "1978-09-02T12:57:49+04:00", "utc": "1978-09-02T08:57:49Z", "ms": 273574669336.20633 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-03", "window": { "start": { "local": "1978-09-03T12:09:30+04:00", "utc": "1978-09-03T08:09:30Z", "ms": 273658170128.79114 }, "end": { "local": "1978-09-03T12:57:30+04:00", "utc": "1978-09-03T08:57:30Z", "ms": 273661050128.79114 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 20:09 on Sat 2 Sep to 21:30 on Sun 3 Sep.", "fact": "1978-09-02T16:08:54Z → 1978-09-03T17:30:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:10–12:58 on the 2nd, 12:10–12:58 on the 3rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during madhyāhna. It covers 0 of 48 minutes on the 2nd and 48 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 25864 s" }, { "step": "ruling", "text": "Rudra Vrata, Tehran, 1978: Sunday 3 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rudra-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 1 Rudra vrata (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-03", "confidence": "determinate" } ], "quote": "In Tehran, Rudra Vrata 1978 falls on Sunday 3 September. Pratipadā runs from 20:09 on Sat 2 Sep to 21:30 on Sun 3 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/rudra-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/haritalika-vrata", "festival": "haritalika-vrata", "name": "Haritālikā Vrata", "everyday": "Hartalika Teej", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34192, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1978-09-04T22:27:03+04:00", "utc": "1978-09-04T18:27:03Z", "ms": 273781622527.6725 }, "end": { "local": "1978-09-05T22:57:04+04:00", "utc": "1978-09-05T18:57:04Z", "ms": 273869824083.08023 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-04T22:27:03+04:00", "utc": "1978-09-04T18:27:03Z", "ms": 273781622527.6725 }, "end": { "local": "1978-09-05T22:57:04+04:00", "utc": "1978-09-05T18:57:04Z", "ms": 273869824083.08023 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-04", "window": { "start": { "local": "1978-09-04T12:09:11+04:00", "utc": "1978-09-04T08:09:11Z", "ms": 273744550655.12842 }, "end": { "local": "1978-09-04T12:57:11+04:00", "utc": "1978-09-04T08:57:11Z", "ms": 273747430655.12842 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-05", "window": { "start": { "local": "1978-09-05T12:08:51+04:00", "utc": "1978-09-05T08:08:51Z", "ms": 273830930929.19205 }, "end": { "local": "1978-09-05T12:56:51+04:00", "utc": "1978-09-05T08:56:51Z", "ms": 273833810929.19205 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 22:27 on Mon 4 Sep to 22:57 on Tue 5 Sep.", "fact": "1978-09-04T18:27:03Z → 1978-09-05T18:57:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 4th, 12:09–12:57 on the 5th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 4th and 48 of 48 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 34192 s" }, { "step": "ruling", "text": "Haritālikā Vrata, Tehran, 1978: Tuesday 5 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "haritalika-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Haritalika vrata (paraviddha), Gauri vrata (Orissa), Gauri (Mysore)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-05", "confidence": "determinate" } ], "quote": "In Tehran, Haritālikā Vrata (Hartalika Teej) 1978 falls on Tuesday 5 September. Tṛtīyā runs from 22:27 on Mon 4 Sep to 22:57 on Tue 5 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/haritalika-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ganesha-chaturthi", "festival": "ganesha-chaturthi", "name": "Gaṇeśa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36013, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-09-05T22:57:04+04:00", "utc": "1978-09-05T18:57:04Z", "ms": 273869824083.08023 }, "end": { "local": "1978-09-06T22:59:16+04:00", "utc": "1978-09-06T18:59:16Z", "ms": 273956355638.34705 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-05T22:57:04+04:00", "utc": "1978-09-05T18:57:04Z", "ms": 273869824083.08023 }, "end": { "local": "1978-09-06T22:59:16+04:00", "utc": "1978-09-06T18:59:16Z", "ms": 273956355638.34705 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-05", "window": { "start": { "local": "1978-09-05T12:08:51+04:00", "utc": "1978-09-05T08:08:51Z", "ms": 273830930929.19205 }, "end": { "local": "1978-09-05T12:56:51+04:00", "utc": "1978-09-05T08:56:51Z", "ms": 273833810929.19205 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-06", "window": { "start": { "local": "1978-09-06T12:08:31+04:00", "utc": "1978-09-06T08:08:31Z", "ms": 273917310965.29974 }, "end": { "local": "1978-09-06T12:56:31+04:00", "utc": "1978-09-06T08:56:31Z", "ms": 273920190965.29974 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:57 on Tue 5 Sep to 22:59 on Wed 6 Sep.", "fact": "1978-09-05T18:57:04Z → 1978-09-06T18:59:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 5th, 12:09–12:57 on the 6th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 5th and 48 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 36013 s" }, { "step": "ruling", "text": "Gaṇeśa Caturthī, Tehran, 1978: Wednesday 6 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ganesha-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 4 Varada caturthi (purvaviddha, madhyahnavyapini), Samvatsari parva (Jain-caturthi paksa), Saubhagya caturthi (Bengal), Ganesa caturthi (madhyahna vyapini and purvaviddha)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-06", "confidence": "determinate" } ], "quote": "In Tehran, Gaṇeśa Caturthī 1978 falls on Wednesday 6 September. Caturthī runs from 22:57 on Tue 5 Sep to 22:59 on Wed 6 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/ganesha-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rishi-panchami", "festival": "rishi-panchami", "name": "Ṛṣi Pañcamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34592, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-09-06T22:59:16+04:00", "utc": "1978-09-06T18:59:16Z", "ms": 273956355638.34705 }, "end": { "local": "1978-09-07T22:32:43+04:00", "utc": "1978-09-07T18:32:43Z", "ms": 274041162816.26486 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-06T22:59:16+04:00", "utc": "1978-09-06T18:59:16Z", "ms": 273956355638.34705 }, "end": { "local": "1978-09-07T22:32:43+04:00", "utc": "1978-09-07T18:32:43Z", "ms": 274041162816.26486 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-06", "window": { "start": { "local": "1978-09-06T12:08:31+04:00", "utc": "1978-09-06T08:08:31Z", "ms": 273917310965.29974 }, "end": { "local": "1978-09-06T12:56:31+04:00", "utc": "1978-09-06T08:56:31Z", "ms": 273920190965.29974 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-07", "window": { "start": { "local": "1978-09-07T12:08:11+04:00", "utc": "1978-09-07T08:08:11Z", "ms": 274003690778.24316 }, "end": { "local": "1978-09-07T12:56:11+04:00", "utc": "1978-09-07T08:56:11Z", "ms": 274006570778.24316 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 22:59 on Wed 6 Sep to 22:33 on Thu 7 Sep.", "fact": "1978-09-06T18:59:16Z → 1978-09-07T18:32:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 6th, 12:08–12:56 on the 7th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 6th and 48 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 34592 s" }, { "step": "ruling", "text": "Ṛṣi Pañcamī, Tehran, 1978: Thursday 7 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rishi-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Rsi pancami (madhyahnavyapini) — If occurs on two successive days, it is to be observed according to Madhava on the 1st day and according to Hemadri and Divodasa on the 2nd day" } ], "kaala": "madhyahna", "priority": "disputed", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-07", "confidence": "determinate" } ], "quote": "In Tehran, Ṛṣi Pañcamī 1978 falls on Thursday 7 September. Pañcamī runs from 22:59 on Wed 6 Sep to 22:33 on Thu 7 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/rishi-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/surya-shashthi-bhadrapada", "festival": "surya-shashthi-bhadrapada", "name": "Sūrya Ṣaṣṭhī (Bhādrapada)", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31273, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-09-07T22:32:43+04:00", "utc": "1978-09-07T18:32:43Z", "ms": 274041162816.26486 }, "end": { "local": "1978-09-08T21:37:03+04:00", "utc": "1978-09-08T17:37:03Z", "ms": 274124223266.21436 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-07T22:32:43+04:00", "utc": "1978-09-07T18:32:43Z", "ms": 274041162816.26486 }, "end": { "local": "1978-09-08T21:37:03+04:00", "utc": "1978-09-08T17:37:03Z", "ms": 274124223266.21436 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-07", "window": { "start": { "local": "1978-09-07T12:08:11+04:00", "utc": "1978-09-07T08:08:11Z", "ms": 274003690778.24316 }, "end": { "local": "1978-09-07T12:56:11+04:00", "utc": "1978-09-07T08:56:11Z", "ms": 274006570778.24316 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-08", "window": { "start": { "local": "1978-09-08T12:07:50+04:00", "utc": "1978-09-08T08:07:50Z", "ms": 274090070383.4276 }, "end": { "local": "1978-09-08T12:55:50+04:00", "utc": "1978-09-08T08:55:50Z", "ms": 274092950383.4276 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 22:33 on Thu 7 Sep to 21:37 on Fri 8 Sep.", "fact": "1978-09-07T18:32:43Z → 1978-09-08T17:37:03Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 7th, 12:08–12:56 on the 8th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 7th and 48 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 31273 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī (Bhādrapada), Tehran, 1978: Friday 8 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "surya-shashthi-bhadrapada", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Surya sasthi (paraviddha), Lolarka sasthi" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-08", "confidence": "determinate" } ], "quote": "In Tehran, Sūrya Ṣaṣṭhī (Bhādrapada) 1978 falls on Friday 8 September. Ṣaṣṭhī runs from 22:33 on Thu 7 Sep to 21:37 on Fri 8 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/surya-shashthi-bhadrapada", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/muktabharana-vrata", "festival": "muktabharana-vrata", "name": "Muktābharaṇa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26233, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1978-09-08T21:37:03+04:00", "utc": "1978-09-08T17:37:03Z", "ms": 274124223266.21436 }, "end": { "local": "1978-09-09T20:12:43+04:00", "utc": "1978-09-09T16:12:43Z", "ms": 274205563036.61472 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-08T21:37:03+04:00", "utc": "1978-09-08T17:37:03Z", "ms": 274124223266.21436 }, "end": { "local": "1978-09-09T20:12:43+04:00", "utc": "1978-09-09T16:12:43Z", "ms": 274205563036.61472 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-08", "window": { "start": { "local": "1978-09-08T12:07:50+04:00", "utc": "1978-09-08T08:07:50Z", "ms": 274090070383.4276 }, "end": { "local": "1978-09-08T12:55:50+04:00", "utc": "1978-09-08T08:55:50Z", "ms": 274092950383.4276 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-09", "window": { "start": { "local": "1978-09-09T12:07:30+04:00", "utc": "1978-09-09T08:07:30Z", "ms": 274176449797.02188 }, "end": { "local": "1978-09-09T12:55:30+04:00", "utc": "1978-09-09T08:55:30Z", "ms": 274179329797.02188 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 21:37 on Fri 8 Sep to 20:13 on Sat 9 Sep.", "fact": "1978-09-08T17:37:03Z → 1978-09-09T16:12:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 8th, 12:07–12:55 on the 9th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 8th and 48 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 26233 s" }, { "step": "ruling", "text": "Muktābharaṇa Vrata, Tehran, 1978: Saturday 9 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "muktabharana-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Muktabharana vrata (purvaviddha), Lalita saptami (Bengal & Orissa)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-09", "confidence": "determinate" } ], "quote": "In Tehran, Muktābharaṇa Vrata 1978 falls on Saturday 9 September. Saptamī runs from 21:37 on Fri 8 Sep to 20:13 on Sat 9 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/muktabharana-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/radhashtami", "festival": "radhashtami", "name": "Rādhāṣṭamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19564, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-09-09T20:12:43+04:00", "utc": "1978-09-09T16:12:43Z", "ms": 274205563036.61472 }, "end": { "local": "1978-09-10T18:21:13+04:00", "utc": "1978-09-10T14:21:13Z", "ms": 274285272581.71692 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-09T20:12:43+04:00", "utc": "1978-09-09T16:12:43Z", "ms": 274205563036.61472 }, "end": { "local": "1978-09-10T18:21:13+04:00", "utc": "1978-09-10T14:21:13Z", "ms": 274285272581.71692 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-09", "window": { "start": { "local": "1978-09-09T12:07:30+04:00", "utc": "1978-09-09T08:07:30Z", "ms": 274176449797.02188 }, "end": { "local": "1978-09-09T12:55:30+04:00", "utc": "1978-09-09T08:55:30Z", "ms": 274179329797.02188 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-10", "window": { "start": { "local": "1978-09-10T12:07:09+04:00", "utc": "1978-09-10T08:07:09Z", "ms": 274262829036.11078 }, "end": { "local": "1978-09-10T12:55:09+04:00", "utc": "1978-09-10T08:55:09Z", "ms": 274265709036.11078 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 20:13 on Sat 9 Sep to 18:21 on Sun 10 Sep.", "fact": "1978-09-09T16:12:43Z → 1978-09-10T14:21:13Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:07–12:55 on the 9th, 12:07–12:55 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 19564 s" }, { "step": "ruling", "text": "Rādhāṣṭamī, Tehran, 1978: Sunday 10 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "radhashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 8 Durvastami (purvaviddha — S 8 of saura Bhadra except Bengal), Mahalaksmi vratarambha, Radhastami (madhyahna vyapini)" } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-10", "confidence": "determinate" } ], "quote": "In Tehran, Rādhāṣṭamī 1978 falls on Sunday 10 September. Aṣṭamī runs from 20:13 on Sat 9 Sep to 18:21 on Sun 10 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/radhashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-09-13", "festival": "ekadashi", "name": "Parivartanī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15755, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-09-12T13:29:02+04:00", "utc": "1978-09-12T09:29:02Z", "ms": 274440542095.50046 }, "end": { "local": "1978-09-13T10:37:45+04:00", "utc": "1978-09-13T06:37:45Z", "ms": 274516664536.16705 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-12T13:29:02+04:00", "utc": "1978-09-12T09:29:02Z", "ms": 274440542095.50046 }, "end": { "local": "1978-09-13T10:37:45+04:00", "utc": "1978-09-13T06:37:45Z", "ms": 274516664536.16705 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-09-12", "window": { "start": { "local": "1978-09-12T06:14:24+04:00", "utc": "1978-09-12T02:14:24Z", "ms": 274414464048.09674 }, "end": { "local": "1978-09-12T06:14:24+04:00", "utc": "1978-09-12T02:14:24Z", "ms": 274414464048.09674 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-09-13", "window": { "start": { "local": "1978-09-13T06:15:09+04:00", "utc": "1978-09-13T02:15:09Z", "ms": 274500909307.46844 }, "end": { "local": "1978-09-13T06:15:09+04:00", "utc": "1978-09-13T02:15:09Z", "ms": 274500909307.46844 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:29 on Tue 12 Sep to 10:38 on Wed 13 Sep.", "fact": "1978-09-12T09:29:02Z → 1978-09-13T06:37:45Z" }, { "step": "kaala", "text": "Sunrise is at 06:14 on the 12th and 06:15 on the 13th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 12th and is on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 15755 s" }, { "step": "ruling", "text": "Parivartanī Ekādaśī, Tehran, 1978: Wednesday 13 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-13", "confidence": "determinate" } ], "quote": "In Tehran, Parivartanī Ekādaśī 1978 falls on Wednesday 13 September. Ekādaśī runs from 13:29 on Tue 12 Sep to 10:38 on Wed 13 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-09-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vamana-jayanti", "festival": "vamana-jayanti", "name": "Vāmana Jayantī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5301, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-09-13T10:37:45+04:00", "utc": "1978-09-13T06:37:45Z", "ms": 274516664536.16705 }, "end": { "local": "1978-09-14T07:37:48+04:00", "utc": "1978-09-14T03:37:48Z", "ms": 274592267747.61972 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-13T10:37:45+04:00", "utc": "1978-09-13T06:37:45Z", "ms": 274516664536.16705 }, "end": { "local": "1978-09-14T07:37:48+04:00", "utc": "1978-09-14T03:37:48Z", "ms": 274592267747.61972 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-09-13", "window": { "start": { "local": "1978-09-13T12:06:06+04:00", "utc": "1978-09-13T08:06:06Z", "ms": 274521965893.9337 }, "end": { "local": "1978-09-13T12:54:06+04:00", "utc": "1978-09-13T08:54:06Z", "ms": 274524845893.9337 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-09-14", "window": { "start": { "local": "1978-09-14T12:05:45+04:00", "utc": "1978-09-14T08:05:45Z", "ms": 274608344628.92175 }, "end": { "local": "1978-09-14T12:53:45+04:00", "utc": "1978-09-14T08:53:45Z", "ms": 274611224628.92175 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 10:38 on Wed 13 Sep to 07:38 on Thu 14 Sep.", "fact": "1978-09-13T06:37:45Z → 1978-09-14T03:37:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:06–12:54 on the 13th, 12:06–12:54 on the 14th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 13th and 0 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5301 s" }, { "step": "ruling", "text": "Vāmana Jayantī, Tehran, 1978: Wednesday 13 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vamana-jayanti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Visnuparivartanotsava, Sakrotthana (in any of the naksatras U. Asadha, Sravana & Dhanistha), Kalki dvadasi, Sravana dvadasi (when combined with naksatra Sravana), Vamana jayanti (madhyahna vyapini)." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-13", "confidence": "determinate" } ], "quote": "In Tehran, Vāmana Jayantī 1978 falls on Wednesday 13 September. Dvādaśī runs from 10:38 on Wed 13 Sep to 07:38 on Thu 14 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vamana-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-09-14", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30026, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-09-14T07:37:48+04:00", "utc": "1978-09-14T03:37:48Z", "ms": 274592267747.61972 }, "end": { "local": "1978-09-15T04:36:26+04:00", "utc": "1978-09-15T00:36:26Z", "ms": 274667785837.7581 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-14T07:37:48+04:00", "utc": "1978-09-14T03:37:48Z", "ms": 274592267747.61972 }, "end": { "local": "1978-09-15T04:36:26+04:00", "utc": "1978-09-15T00:36:26Z", "ms": 274667785837.7581 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-09-13", "window": { "start": { "local": "1978-09-13T18:45:02+04:00", "utc": "1978-09-13T14:45:02Z", "ms": 274545902480.39893 }, "end": { "local": "1978-09-13T20:17:09+04:00", "utc": "1978-09-13T16:17:09Z", "ms": 274551429425.72742 } }, "covered_min": 0, "window_min": 92, "qualifies": false }, { "local_date": "1978-09-14", "window": { "start": { "local": "1978-09-14T18:43:35+04:00", "utc": "1978-09-14T14:43:35Z", "ms": 274632214687.48083 }, "end": { "local": "1978-09-14T20:15:59+04:00", "utc": "1978-09-14T16:15:59Z", "ms": 274637759376.01807 } }, "covered_min": 92, "window_min": 92, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 07:38 on Thu 14 Sep to 04:36 on Fri 15 Sep.", "fact": "1978-09-14T03:37:48Z → 1978-09-15T00:36:26Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:45–20:17 on the 13th, 18:44–20:16 on the 14th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 92 minutes on the 13th and 92 of 92 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 30026 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Thursday 14 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-14", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Thursday 14 September. Trayodaśī runs from 07:38 on Thu 14 Sep to 04:36 on Fri 15 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-09-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ananta-chaturdashi", "festival": "ananta-chaturdashi", "name": "Ananta Caturdaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6014, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-09-15T04:36:26+04:00", "utc": "1978-09-15T00:36:26Z", "ms": 274667785837.7581 }, "end": { "local": "1978-09-16T01:41:29+04:00", "utc": "1978-09-15T21:41:29Z", "ms": 274743688841.7156 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1978-09-15T04:36:26+04:00", "utc": "1978-09-15T00:36:26Z", "ms": 274667785837.7581 }, "end": { "local": "1978-09-16T01:41:29+04:00", "utc": "1978-09-15T21:41:29Z", "ms": 274743688841.7156 } }, "kaala": "udaya-3", "days": [ { "local_date": "1978-09-15", "window": { "start": { "local": "1978-09-15T06:16:40+04:00", "utc": "1978-09-15T02:16:40Z", "ms": 274673799851.5101 }, "end": { "local": "1978-09-15T08:45:45+04:00", "utc": "1978-09-15T04:45:45Z", "ms": 274682745228.07156 } }, "covered_min": 149, "window_min": 149, "qualifies": true }, { "local_date": "1978-09-16", "window": { "start": { "local": "1978-09-16T06:17:25+04:00", "utc": "1978-09-16T02:17:25Z", "ms": 274760245166.72095 }, "end": { "local": "1978-09-16T08:46:04+04:00", "utc": "1978-09-16T04:46:04Z", "ms": 274769163863.73837 } }, "covered_min": 0, "window_min": 149, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 04:36 on Fri 15 Sep to 01:41 on Sat 16 Sep.", "fact": "1978-09-15T00:36:26Z → 1978-09-15T21:41:29Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:17–08:46 on the 15th, 06:17–08:46 on the 16th.", "fact": "udaya-3: day-muhurta-1-3 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must hold through the first three muhūrtas after sunrise. It covers 149 of 149 minutes on the 15th and 0 of 149 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one morning qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 6014 s" }, { "step": "ruling", "text": "Ananta Caturdaśī, Tehran, 1978: Friday 15 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ananta-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 14 Ananta caturdasi (covering three muhurtas from sunrise, but one muhurta in Bengal)." } ], "not_evaluated": "In Bengal the row asks for one muhūrta from sunrise; that reading is not applied.", "kaala": "udaya-3", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-15", "confidence": "determinate" } ], "quote": "In Tehran, Ananta Caturdaśī 1978 falls on Friday 15 September. Caturdaśī runs from 04:36 on Fri 15 Sep to 01:41 on Sat 16 Sep and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/tehran/festivals/1978/ananta-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-09-19", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9612, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-09-19T17:45:30+04:00", "utc": "1978-09-19T13:45:30Z", "ms": 275060729795.0271 }, "end": { "local": "1978-09-20T17:16:50+04:00", "utc": "1978-09-20T13:16:50Z", "ms": 275145409573.5981 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-09-19T17:45:30+04:00", "utc": "1978-09-19T13:45:30Z", "ms": 275060729795.0271 }, "end": { "local": "1978-09-20T17:16:50+04:00", "utc": "1978-09-20T13:16:50Z", "ms": 275145409573.5981 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-09-19", "window": { "start": { "local": "1978-09-19T20:25:41+04:00", "utc": "1978-09-19T16:25:41Z", "ms": 275070341487.6716 }, "end": { "local": "1978-09-19T20:25:41+04:00", "utc": "1978-09-19T16:25:41Z", "ms": 275070341487.6716 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-09-20", "window": { "start": { "local": "1978-09-20T21:05:11+04:00", "utc": "1978-09-20T17:05:11Z", "ms": 275159111402.7614 }, "end": { "local": "1978-09-20T21:05:11+04:00", "utc": "1978-09-20T17:05:11Z", "ms": 275159111402.7614 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:45 on Tue 19 Sep to 17:17 on Wed 20 Sep.", "fact": "1978-09-19T13:45:30Z → 1978-09-20T13:16:50Z" }, { "step": "kaala", "text": "Moonrise is at 20:26 on the 19th and 21:05 on the 20th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 19th and is not on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9612 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Tuesday 19 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-19", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Tuesday 19 September. Caturthī runs from 17:45 on Tue 19 Sep to 17:17 on Wed 20 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-09-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/chandra-shashthi", "festival": "chandra-shashthi", "name": "Candra Ṣaṣṭhī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14345, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-09-21T17:32:16+04:00", "utc": "1978-09-21T13:32:16Z", "ms": 275232735885.26556 }, "end": { "local": "1978-09-22T18:30:46+04:00", "utc": "1978-09-22T14:30:46Z", "ms": 275322646154.77747 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-09-21T17:32:16+04:00", "utc": "1978-09-21T13:32:16Z", "ms": 275232735885.26556 }, "end": { "local": "1978-09-22T18:30:46+04:00", "utc": "1978-09-22T14:30:46Z", "ms": 275322646154.77747 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-09-21", "window": { "start": { "local": "1978-09-21T21:46:26+04:00", "utc": "1978-09-21T17:46:26Z", "ms": 275247986015.7602 }, "end": { "local": "1978-09-21T21:46:26+04:00", "utc": "1978-09-21T17:46:26Z", "ms": 275247986015.7602 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-09-22", "window": { "start": { "local": "1978-09-22T22:29:51+04:00", "utc": "1978-09-22T18:29:51Z", "ms": 275336991141.28253 }, "end": { "local": "1978-09-22T22:29:51+04:00", "utc": "1978-09-22T18:29:51Z", "ms": 275336991141.28253 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 17:32 on Thu 21 Sep to 18:31 on Fri 22 Sep.", "fact": "1978-09-21T13:32:16Z → 1978-09-22T14:30:46Z" }, { "step": "kaala", "text": "Moonrise is at 21:46 on the 21st and 22:30 on the 22nd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Ṣaṣṭhī must be current at moonrise. It is on the 21st and is not on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 14345 s" }, { "step": "ruling", "text": "Candra Ṣaṣṭhī, Tehran, 1978: Thursday 21 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "chandra-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 6 Candra sasthi (Sasthi current at moon-rise, if occurs on two successive days, it is to be observed on the first day)." } ], "kaala": "moonrise", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-21", "confidence": "determinate" } ], "quote": "In Tehran, Candra Ṣaṣṭhī 1978 falls on Thursday 21 September. Ṣaṣṭhī runs from 17:32 on Thu 21 Sep to 18:31 on Fri 22 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/chandra-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/mahalakshmi-vrata-samapana", "festival": "mahalakshmi-vrata-samapana", "name": "Mahālakṣmī Vrata Samāpana", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6611, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-09-23T20:07:26+04:00", "utc": "1978-09-23T16:07:26Z", "ms": 275414846167.62415 }, "end": { "local": "1978-09-24T22:13:34+04:00", "utc": "1978-09-24T18:13:34Z", "ms": 275508813757.0435 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-09-23T20:07:26+04:00", "utc": "1978-09-23T16:07:26Z", "ms": 275414846167.62415 }, "end": { "local": "1978-09-24T22:13:34+04:00", "utc": "1978-09-24T18:13:34Z", "ms": 275508813757.0435 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-09-23", "window": { "start": { "local": "1978-09-23T23:15:38+04:00", "utc": "1978-09-23T19:15:38Z", "ms": 275426138220.9798 }, "end": { "local": "1978-09-23T23:15:38+04:00", "utc": "1978-09-23T19:15:38Z", "ms": 275426138220.9798 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-09-24", "window": { "start": { "local": "1978-09-25T00:03:45+04:00", "utc": "1978-09-24T20:03:45Z", "ms": 275515424500.27594 }, "end": { "local": "1978-09-25T00:03:45+04:00", "utc": "1978-09-24T20:03:45Z", "ms": 275515424500.27594 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 20:07 on Sat 23 Sep to 22:14 on Sun 24 Sep.", "fact": "1978-09-23T16:07:26Z → 1978-09-24T18:13:34Z" }, { "step": "kaala", "text": "Moonrise is at 23:16 on the 23rd and 00:04 on the 24th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is on the 23rd and is not on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 6611 s" }, { "step": "ruling", "text": "Mahālakṣmī Vrata Samāpana, Tehran, 1978: Saturday 23 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "mahalakshmi-vrata-samapana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Mahalaksmi vrata samapana (current at moonrise), Jitastami (pradosa), Jimutavahana puja" } ], "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-23", "confidence": "determinate" } ], "quote": "In Tehran, Mahālakṣmī Vrata Samāpana 1978 falls on Saturday 23 September. Aṣṭamī runs from 20:07 on Sat 23 Sep to 22:14 on Sun 24 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/mahalakshmi-vrata-samapana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/jitashtami", "festival": "jitashtami", "name": "Jitāṣṭamī", "everyday": "Jitiya", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-24", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 120, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-09-23T20:07:26+04:00", "utc": "1978-09-23T16:07:26Z", "ms": 275414846167.62415 }, "end": { "local": "1978-09-24T22:13:34+04:00", "utc": "1978-09-24T18:13:34Z", "ms": 275508813757.0435 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-09-23T20:07:26+04:00", "utc": "1978-09-23T16:07:26Z", "ms": 275414846167.62415 }, "end": { "local": "1978-09-24T22:13:34+04:00", "utc": "1978-09-24T18:13:34Z", "ms": 275508813757.0435 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-09-23", "window": { "start": { "local": "1978-09-23T18:30:21+04:00", "utc": "1978-09-23T14:30:21Z", "ms": 275409021122.64185 }, "end": { "local": "1978-09-23T20:05:26+04:00", "utc": "1978-09-23T16:05:26Z", "ms": 275414726434.3189 } }, "covered_min": 0, "window_min": 95, "qualifies": false }, { "local_date": "1978-09-24", "window": { "start": { "local": "1978-09-24T18:28:53+04:00", "utc": "1978-09-24T14:28:53Z", "ms": 275495333136.522 }, "end": { "local": "1978-09-24T20:04:16+04:00", "utc": "1978-09-24T16:04:16Z", "ms": 275501056360.48975 } }, "covered_min": 95, "window_min": 95, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 20:07 on Sat 23 Sep to 22:14 on Sun 24 Sep.", "fact": "1978-09-23T16:07:26Z → 1978-09-24T18:13:34Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:30–20:05 on the 23rd, 18:29–20:04 on the 24th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during pradoṣa. It covers 0 of 95 minutes on the 23rd and 95 of 95 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 120 s < 300 s" }, { "step": "ruling", "text": "Jitāṣṭamī, Tehran, 1978: Sunday 24 September.", "fact": "confidence: boundary (margin)" } ], "rule": { "kind": "lunar", "id": "jitashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Mahalaksmi vrata samapana (current at moonrise), Jitastami (pradosa), Jimutavahana puja" } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-24", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-24", "confidence": "boundary" } ], "quote": "In Tehran, Jitāṣṭamī (Jitiya) 1978 falls on Sunday 24 September. Aṣṭamī runs from 20:07 on Sat 23 Sep to 22:14 on Sun 24 Sep and covers all of pradoṣa that evening. It is 2 min 00 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/tehran/festivals/1978/jitashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-09-27", "festival": "ekadashi", "name": "Indirā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3602, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-09-27T03:06:03+04:00", "utc": "1978-09-26T23:06:03Z", "ms": 275699163444.0725 }, "end": { "local": "1978-09-28T05:26:35+04:00", "utc": "1978-09-28T01:26:35Z", "ms": 275793995247.0223 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-09-27T03:06:03+04:00", "utc": "1978-09-26T23:06:03Z", "ms": 275699163444.0725 }, "end": { "local": "1978-09-28T05:26:35+04:00", "utc": "1978-09-28T01:26:35Z", "ms": 275793995247.0223 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-09-27", "window": { "start": { "local": "1978-09-27T06:25:51+04:00", "utc": "1978-09-27T02:25:51Z", "ms": 275711150585.61145 }, "end": { "local": "1978-09-27T06:25:51+04:00", "utc": "1978-09-27T02:25:51Z", "ms": 275711150585.61145 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-09-28", "window": { "start": { "local": "1978-09-28T06:26:38+04:00", "utc": "1978-09-28T02:26:38Z", "ms": 275797597519.63104 }, "end": { "local": "1978-09-28T06:26:38+04:00", "utc": "1978-09-28T02:26:38Z", "ms": 275797597519.63104 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:06 on Wed 27 Sep to 05:27 on Thu 28 Sep.", "fact": "1978-09-26T23:06:03Z → 1978-09-28T01:26:35Z" }, { "step": "kaala", "text": "Sunrise is at 06:26 on the 27th and 06:27 on the 28th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 27th and is not on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 3602 s" }, { "step": "ruling", "text": "Indirā Ekādaśī, Tehran, 1978: Wednesday 27 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-27", "confidence": "determinate" } ], "quote": "In Tehran, Indirā Ekādaśī 1978 falls on Wednesday 27 September. Ekādaśī runs from 03:06 on Wed 27 Sep to 05:27 on Thu 28 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-09-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-09-29", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33385, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-09-29T07:28:22+04:00", "utc": "1978-09-29T03:28:22Z", "ms": 275887702126.01764 }, "end": { "local": "1978-09-30T09:03:44+04:00", "utc": "1978-09-30T05:03:44Z", "ms": 275979823874.5102 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-09-29T07:28:22+04:00", "utc": "1978-09-29T03:28:22Z", "ms": 275887702126.01764 }, "end": { "local": "1978-09-30T09:03:44+04:00", "utc": "1978-09-30T05:03:44Z", "ms": 275979823874.5102 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-09-29", "window": { "start": { "local": "1978-09-29T18:21:36+04:00", "utc": "1978-09-29T14:21:36Z", "ms": 275926895976.85645 }, "end": { "local": "1978-09-29T19:58:29+04:00", "utc": "1978-09-29T15:58:29Z", "ms": 275932708784.4457 } }, "covered_min": 97, "window_min": 97, "qualifies": true }, { "local_date": "1978-09-30", "window": { "start": { "local": "1978-09-30T18:20:09+04:00", "utc": "1978-09-30T14:20:09Z", "ms": 276013209295.24426 }, "end": { "local": "1978-09-30T19:57:20+04:00", "utc": "1978-09-30T15:57:20Z", "ms": 276019040006.677 } }, "covered_min": 0, "window_min": 97, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 07:28 on Fri 29 Sep to 09:04 on Sat 30 Sep.", "fact": "1978-09-29T03:28:22Z → 1978-09-30T05:03:44Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:22–19:58 on the 29th, 18:20–19:57 on the 30th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 97 of 97 minutes on the 29th and 0 of 97 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33385 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Friday 29 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-29", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Friday 29 September. Trayodaśī runs from 07:28 on Fri 29 Sep to 09:04 on Sat 30 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-09-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-09-30", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-09-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29690, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-09-30T09:03:44+04:00", "utc": "1978-09-30T05:03:44Z", "ms": 275979823874.5102 }, "end": { "local": "1978-10-01T10:08:18+04:00", "utc": "1978-10-01T06:08:18Z", "ms": 276070097682.953 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-09-30T09:03:44+04:00", "utc": "1978-09-30T05:03:44Z", "ms": 275979823874.5102 }, "end": { "local": "1978-10-01T10:08:18+04:00", "utc": "1978-10-01T06:08:18Z", "ms": 276070097682.953 } }, "kaala": "nishita", "days": [ { "local_date": "1978-09-29", "window": { "start": { "local": "1978-09-30T00:00:54+04:00", "utc": "1978-09-29T20:00:54Z", "ms": 275947254005.31604 }, "end": { "local": "1978-09-30T00:48:54+04:00", "utc": "1978-09-29T20:48:54Z", "ms": 275950134005.31604 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-09-30", "window": { "start": { "local": "1978-10-01T00:00:34+04:00", "utc": "1978-09-30T20:00:34Z", "ms": 276033634463.11694 }, "end": { "local": "1978-10-01T00:48:34+04:00", "utc": "1978-09-30T20:48:34Z", "ms": 276036514463.11694 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 09:04 on Sat 30 Sep to 10:08 on Sun 1 Oct.", "fact": "1978-09-30T05:03:44Z → 1978-10-01T06:08:18Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:01–00:49 on the 29th, 00:01–00:49 on the 30th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 29th and 48 of 48 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 29690 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Saturday 30 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-09-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-09-30", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Saturday 30 September. Caturdaśī runs from 09:04 on Sat 30 Sep to 10:08 on Sun 1 Oct and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-09-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/mahalaya-amavasya", "festival": "mahalaya-amavasya", "name": "Mahālaya Amāvāsyā", "everyday": "Sarvapitṛ Amāvāsyā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10419, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1978-10-01T10:08:18+04:00", "utc": "1978-10-01T06:08:18Z", "ms": 276070097682.953 }, "end": { "local": "1978-10-02T10:40:38+04:00", "utc": "1978-10-02T06:40:38Z", "ms": 276158438374.4601 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-01T10:08:18+04:00", "utc": "1978-10-01T06:08:18Z", "ms": 276070097682.953 }, "end": { "local": "1978-10-02T10:40:38+04:00", "utc": "1978-10-02T06:40:38Z", "ms": 276158438374.4601 } }, "kaala": "aparahna", "days": [ { "local_date": "1978-10-01", "window": { "start": { "local": "1978-10-01T13:34:50+04:00", "utc": "1978-10-01T09:34:50Z", "ms": 276082489609.0958 }, "end": { "local": "1978-10-01T15:56:46+04:00", "utc": "1978-10-01T11:56:46Z", "ms": 276091006268.4646 } }, "covered_min": 142, "window_min": 142, "qualifies": true }, { "local_date": "1978-10-02", "window": { "start": { "local": "1978-10-02T13:34:17+04:00", "utc": "1978-10-02T09:34:17Z", "ms": 276168857126.9797 }, "end": { "local": "1978-10-02T15:55:47+04:00", "utc": "1978-10-02T11:55:47Z", "ms": 276177347014.11084 } }, "covered_min": 0, "window_min": 141, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 10:08 on Sun 1 Oct to 10:41 on Mon 2 Oct.", "fact": "1978-10-01T06:08:18Z → 1978-10-02T06:40:38Z" }, { "step": "kaala", "text": "Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:35–15:57 on the 1st, 13:34–15:56 on the 2nd.", "fact": "aparahna: day-muhurta-10-12 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during aparāhṇa. It covers 142 of 142 minutes on the 1st and 0 of 141 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one afternoon qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 10419 s" }, { "step": "ruling", "text": "Mahālaya Amāvāsyā, Tehran, 1978: Sunday 1 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "mahalaya-amavasya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 30 Mahalaya amavasya (aparahnavyapini)" } ], "not_evaluated": "The note on p. 106 gives the first day in a decreasing tithimāna and the second in an increasing one, when amāvāsyā covers the whole of aparāhṇa on both days; tithimāna is not computed.", "kaala": "aparahna", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-01", "confidence": "determinate" } ], "quote": "In Tehran, Mahālaya Amāvāsyā 1978 falls on Sunday 1 October. Amāvasyā runs from 10:08 on Sun 1 Oct to 10:41 on Mon 2 Oct and covers all of aparāhṇa that afternoon.", "cite": "https://ahargana.org/tehran/festivals/1978/mahalaya-amavasya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/navaratra-arambha", "festival": "navaratra-arambha", "name": "Navarātrārambha", "everyday": "Navratri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4655, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1978-10-02T10:40:38+04:00", "utc": "1978-10-02T06:40:38Z", "ms": 276158438374.4601 }, "end": { "local": "1978-10-03T10:41:39+04:00", "utc": "1978-10-03T06:41:39Z", "ms": 276244898838.3077 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-02T10:40:38+04:00", "utc": "1978-10-02T06:40:38Z", "ms": 276158438374.4601 }, "end": { "local": "1978-10-03T10:41:39+04:00", "utc": "1978-10-03T06:41:39Z", "ms": 276244898838.3077 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-10-02", "window": { "start": { "local": "1978-10-02T11:59:32+04:00", "utc": "1978-10-02T07:59:32Z", "ms": 276163172183.41406 }, "end": { "local": "1978-10-02T12:47:32+04:00", "utc": "1978-10-02T08:47:32Z", "ms": 276166052183.41406 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-10-03", "window": { "start": { "local": "1978-10-03T11:59:13+04:00", "utc": "1978-10-03T07:59:13Z", "ms": 276249553392.9142 }, "end": { "local": "1978-10-03T12:47:13+04:00", "utc": "1978-10-03T08:47:13Z", "ms": 276252433392.9142 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 10:41 on Mon 2 Oct to 10:42 on Tue 3 Oct.", "fact": "1978-10-02T06:40:38Z → 1978-10-03T06:41:39Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 2nd, 11:59–12:47 on the 3rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during madhyāhna. It covers 48 of 48 minutes on the 2nd and 0 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 4655 s" }, { "step": "ruling", "text": "Navarātrārambha, Tehran, 1978: Monday 2 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "navaratra-arambha", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 1 Navaratrarambha (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-02", "confidence": "determinate" } ], "quote": "In Tehran, Navarātrārambha (Navratri) 1978 falls on Monday 2 October. Pratipadā runs from 10:41 on Mon 2 Oct to 10:42 on Tue 3 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/navaratra-arambha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-10-05", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9501, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-10-05T09:20:15+04:00", "utc": "1978-10-05T05:20:15Z", "ms": 276412815437.1351 }, "end": { "local": "1978-10-06T08:04:48+04:00", "utc": "1978-10-06T04:04:48Z", "ms": 276494688398.4105 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-05T09:20:15+04:00", "utc": "1978-10-05T05:20:15Z", "ms": 276412815437.1351 }, "end": { "local": "1978-10-06T08:04:48+04:00", "utc": "1978-10-06T04:04:48Z", "ms": 276494688398.4105 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-10-05", "window": { "start": { "local": "1978-10-05T11:58:37+04:00", "utc": "1978-10-05T07:58:37Z", "ms": 276422316793.75256 }, "end": { "local": "1978-10-05T12:46:37+04:00", "utc": "1978-10-05T08:46:37Z", "ms": 276425196793.75256 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-10-06", "window": { "start": { "local": "1978-10-06T11:58:19+04:00", "utc": "1978-10-06T07:58:19Z", "ms": 276508699017.5933 }, "end": { "local": "1978-10-06T12:46:19+04:00", "utc": "1978-10-06T08:46:19Z", "ms": 276511579017.5933 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 09:20 on Thu 5 Oct to 08:05 on Fri 6 Oct.", "fact": "1978-10-05T05:20:15Z → 1978-10-06T04:04:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 5th, 11:58–12:46 on the 6th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 5th and 0 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9501 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Thursday 5 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-05", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Thursday 5 October. Caturthī runs from 09:20 on Thu 5 Oct to 08:05 on Fri 6 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-10-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/durga-saptami", "festival": "durga-saptami", "name": "Durgā Saptamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6743, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1978-10-08T04:42:17+04:00", "utc": "1978-10-08T00:42:17Z", "ms": 276655336549.7329 }, "end": { "local": "1978-10-09T02:41:43+04:00", "utc": "1978-10-08T22:41:43Z", "ms": 276734502983.7475 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-08T04:42:17+04:00", "utc": "1978-10-08T00:42:17Z", "ms": 276655336549.7329 }, "end": { "local": "1978-10-09T02:41:43+04:00", "utc": "1978-10-08T22:41:43Z", "ms": 276734502983.7475 } }, "kaala": "udaya-1", "days": [ { "local_date": "1978-10-08", "window": { "start": { "local": "1978-10-08T06:34:40+04:00", "utc": "1978-10-08T02:34:40Z", "ms": 276662079801.8411 }, "end": { "local": "1978-10-08T07:20:56+04:00", "utc": "1978-10-08T03:20:56Z", "ms": 276664856440.9411 } }, "covered_min": 46, "window_min": 46, "qualifies": true }, { "local_date": "1978-10-09", "window": { "start": { "local": "1978-10-09T06:35:29+04:00", "utc": "1978-10-09T02:35:29Z", "ms": 276748529465.80707 }, "end": { "local": "1978-10-09T07:21:37+04:00", "utc": "1978-10-09T03:21:37Z", "ms": 276751297268.1682 } }, "covered_min": 0, "window_min": 46, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 04:42 on Sun 8 Oct to 02:42 on Mon 9 Oct.", "fact": "1978-10-08T00:42:17Z → 1978-10-08T22:41:43Z" }, { "step": "kaala", "text": "The first muhūrta after sunrise is 1st of 15 day muhūrtas: 06:35–07:21 on the 8th, 06:35–07:22 on the 9th.", "fact": "udaya-1: day-muhurta-1-1 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must hold through the first muhūrta after sunrise. It covers 46 of 46 minutes on the 8th and 0 of 46 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one morning qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 6743 s" }, { "step": "ruling", "text": "Durgā Saptamī, Tehran, 1978: Sunday 8 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "durga-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Durga saptami (paraviddha) — covering one muhurta from sunrise" } ], "kaala": "udaya-1", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-08", "confidence": "determinate" } ], "quote": "In Tehran, Durgā Saptamī 1978 falls on Sunday 8 October. Saptamī runs from 04:42 on Sun 8 Oct to 02:42 on Mon 9 Oct and covers all of the first muhūrta after sunrise that morning.", "cite": "https://ahargana.org/tehran/festivals/1978/durga-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/mahashtami", "festival": "mahashtami", "name": "Mahāṣṭamī", "everyday": "Durga Ashtami", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33345, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-10-09T02:41:43+04:00", "utc": "1978-10-08T22:41:43Z", "ms": 276734502983.7475 }, "end": { "local": "1978-10-10T00:32:17+04:00", "utc": "1978-10-09T20:32:17Z", "ms": 276813136688.3665 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-09T02:41:43+04:00", "utc": "1978-10-08T22:41:43Z", "ms": 276734502983.7475 }, "end": { "local": "1978-10-10T00:32:17+04:00", "utc": "1978-10-09T20:32:17Z", "ms": 276813136688.3665 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-10-09", "window": { "start": { "local": "1978-10-09T11:57:28+04:00", "utc": "1978-10-09T07:57:28Z", "ms": 276767847983.51587 }, "end": { "local": "1978-10-09T12:45:28+04:00", "utc": "1978-10-09T08:45:28Z", "ms": 276770727983.51587 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-10-10", "window": { "start": { "local": "1978-10-10T11:57:12+04:00", "utc": "1978-10-10T07:57:12Z", "ms": 276854231796.19855 }, "end": { "local": "1978-10-10T12:45:12+04:00", "utc": "1978-10-10T08:45:12Z", "ms": 276857111796.19855 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 02:42 on Mon 9 Oct to 00:32 on Tue 10 Oct.", "fact": "1978-10-08T22:41:43Z → 1978-10-09T20:32:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 9th, 11:57–12:45 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 9th and 0 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33345 s" }, { "step": "ruling", "text": "Mahāṣṭamī, Tehran, 1978: Monday 9 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "mahashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 8 Mahastami (paraviddha)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-09", "confidence": "determinate" } ], "quote": "In Tehran, Mahāṣṭamī (Durga Ashtami) 1978 falls on Monday 9 October. Aṣṭamī runs from 02:42 on Mon 9 Oct to 00:32 on Tue 10 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/mahashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/mahanavami", "festival": "mahanavami", "name": "Mahānavamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34301, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1978-10-10T00:32:17+04:00", "utc": "1978-10-09T20:32:17Z", "ms": 276813136688.3665 }, "end": { "local": "1978-10-10T22:16:53+04:00", "utc": "1978-10-10T18:16:53Z", "ms": 276891413121.6108 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-10T00:32:17+04:00", "utc": "1978-10-09T20:32:17Z", "ms": 276813136688.3665 }, "end": { "local": "1978-10-10T22:16:53+04:00", "utc": "1978-10-10T18:16:53Z", "ms": 276891413121.6108 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-10-09", "window": { "start": { "local": "1978-10-09T11:57:28+04:00", "utc": "1978-10-09T07:57:28Z", "ms": 276767847983.51587 }, "end": { "local": "1978-10-09T12:45:28+04:00", "utc": "1978-10-09T08:45:28Z", "ms": 276770727983.51587 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-10-10", "window": { "start": { "local": "1978-10-10T11:57:12+04:00", "utc": "1978-10-10T07:57:12Z", "ms": 276854231796.19855 }, "end": { "local": "1978-10-10T12:45:12+04:00", "utc": "1978-10-10T08:45:12Z", "ms": 276857111796.19855 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 00:32 on Tue 10 Oct to 22:17 on Tue 10 Oct.", "fact": "1978-10-09T20:32:17Z → 1978-10-10T18:16:53Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 9th, 11:57–12:45 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 34301 s" }, { "step": "ruling", "text": "Mahānavamī, Tehran, 1978: Tuesday 10 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "mahanavami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 9 Mahanavami (purvaviddha) (In Bengal it is observed as paraviddha covering one muhurta from sunrise)." } ], "not_evaluated": "The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.", "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-10", "confidence": "determinate" } ], "quote": "In Tehran, Mahānavamī 1978 falls on Tuesday 10 October. Navamī runs from 00:32 on Tue 10 Oct to 22:17 on Tue 10 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/mahanavami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vijaya-dashami", "festival": "vijaya-dashami", "name": "Vijayā Daśamī", "everyday": "Dussehra", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-11", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 234, "anga": { "type": "tithi", "index": 9, "key": "dashami", "name": "Daśamī", "start": { "local": "1978-10-10T22:16:53+04:00", "utc": "1978-10-10T18:16:53Z", "ms": 276891413121.6108 }, "end": { "local": "1978-10-11T19:58:40+04:00", "utc": "1978-10-11T15:58:40Z", "ms": 276969519521.0079 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "conjunction", "start": { "local": "1978-10-10T22:16:53+04:00", "utc": "1978-10-10T18:16:53Z", "ms": 276891413121.6108 }, "end": { "local": "1978-10-11T18:08:36+04:00", "utc": "1978-10-11T14:08:36Z", "ms": 276962916175.14343 }, "nakshatra": { "type": "nakshatra", "index": 21, "key": "shravana", "name": "Śravaṇa", "start": { "local": "1978-10-10T19:42:18+04:00", "utc": "1978-10-10T15:42:18Z", "ms": 276882138499.87946 }, "end": { "local": "1978-10-11T18:08:36+04:00", "utc": "1978-10-11T14:08:36Z", "ms": 276962916175.14343 } } }, "kaala": "daytime", "days": [ { "local_date": "1978-10-10", "window": { "start": { "local": "1978-10-10T06:36:19+04:00", "utc": "1978-10-10T02:36:19Z", "ms": 276834979414.8559 }, "end": { "local": "1978-10-10T18:06:04+04:00", "utc": "1978-10-10T14:06:04Z", "ms": 276876364177.5412 } }, "covered_min": 0, "window_min": 690, "qualifies": false }, { "local_date": "1978-10-11", "window": { "start": { "local": "1978-10-11T06:37:10+04:00", "utc": "1978-10-11T02:37:10Z", "ms": 276921429656.47644 }, "end": { "local": "1978-10-11T18:04:42+04:00", "utc": "1978-10-11T14:04:42Z", "ms": 276962682448.8033 } }, "covered_min": 688, "window_min": 688, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Daśamī runs from 22:17 on Tue 10 Oct to 19:59 on Wed 11 Oct, and Śravaṇa from 19:42 on Tue 10 Oct to 18:09 on Wed 11 Oct. They are together from 22:17 on Tue 10 Oct to 18:09 on Wed 11 Oct.", "fact": "1978-10-10T18:16:53Z → 1978-10-11T14:08:36Z" }, { "step": "kaala", "text": "The day time is sunrise to sunset: 06:36–18:06 on the 10th, 06:37–18:05 on the 11th.", "fact": "daytime: sunrise-to-sunset · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Where Daśamī touches Śravaṇa in the day time, that day is taken. Together they cover 0 of 690 minutes on the 10th and 688 of 688 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one day qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 234 s < 300 s" }, { "step": "ruling", "text": "Vijayā Daśamī, Tehran, 1978: Wednesday 11 October.", "fact": "confidence: boundary (margin)" } ], "rule": { "kind": "lunar", "id": "vijaya-dashami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 10 Vijaya dasami (In Bengal it is observed as paraviddha, covering one muhurta from sunrise. In other places, if it touches Sravana naksatra in the day time it is observed on that day), Sarasvati visarjana (to be observed in naksatra Sravana), Dasahara." } ], "not_evaluated": "The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.", "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day", "conjunction": { "nakshatra": "Śravaṇa", "kaala": "daytime" } }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-11", "confidence": "boundary" } ], "quote": "In Tehran, Vijayā Daśamī (Dussehra) 1978 falls on Wednesday 11 October. Daśamī runs from 22:17 on Tue 10 Oct to 19:59 on Wed 11 Oct and is with Śravaṇa in the day time that day, for 688 minutes. It is 3 min 54 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/tehran/festivals/1978/vijaya-dashami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-10-12", "festival": "ekadashi", "name": "Pāśāṅkuśā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38361, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-10-11T19:58:40+04:00", "utc": "1978-10-11T15:58:40Z", "ms": 276969519521.0079 }, "end": { "local": "1978-10-12T17:41:08+04:00", "utc": "1978-10-12T13:41:08Z", "ms": 277047667594.5804 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-11T19:58:40+04:00", "utc": "1978-10-11T15:58:40Z", "ms": 276969519521.0079 }, "end": { "local": "1978-10-12T17:41:08+04:00", "utc": "1978-10-12T13:41:08Z", "ms": 277047667594.5804 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-10-12", "window": { "start": { "local": "1978-10-12T06:38:00+04:00", "utc": "1978-10-12T02:38:00Z", "ms": 277007880199.1601 }, "end": { "local": "1978-10-12T06:38:00+04:00", "utc": "1978-10-12T02:38:00Z", "ms": 277007880199.1601 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-10-13", "window": { "start": { "local": "1978-10-13T06:38:51+04:00", "utc": "1978-10-13T02:38:51Z", "ms": 277094331052.4004 }, "end": { "local": "1978-10-13T06:38:51+04:00", "utc": "1978-10-13T02:38:51Z", "ms": 277094331052.4004 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 19:59 on Wed 11 Oct to 17:41 on Thu 12 Oct.", "fact": "1978-10-11T15:58:40Z → 1978-10-12T13:41:08Z" }, { "step": "kaala", "text": "Sunrise is at 06:38 on the 12th and 06:39 on the 13th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 12th and is not on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 38361 s" }, { "step": "ruling", "text": "Pāśāṅkuśā Ekādaśī, Tehran, 1978: Thursday 12 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-12", "confidence": "determinate" } ], "quote": "In Tehran, Pāśāṅkuśā Ekādaśī 1978 falls on Thursday 12 October. Ekādaśī runs from 19:59 on Wed 11 Oct to 17:41 on Thu 12 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-10-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-10-13", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9217, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-10-13T15:28:23+04:00", "utc": "1978-10-13T11:28:23Z", "ms": 277126103470.94995 }, "end": { "local": "1978-10-14T13:25:13+04:00", "utc": "1978-10-14T09:25:13Z", "ms": 277205112693.0177 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1978-10-13T15:28:23+04:00", "utc": "1978-10-13T11:28:23Z", "ms": 277126103470.94995 }, "end": { "local": "1978-10-14T13:25:13+04:00", "utc": "1978-10-14T09:25:13Z", "ms": 277205112693.0177 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-10-13", "window": { "start": { "local": "1978-10-13T18:02:01+04:00", "utc": "1978-10-13T14:02:01Z", "ms": 277135320906.62933 }, "end": { "local": "1978-10-13T19:43:02+04:00", "utc": "1978-10-13T15:43:02Z", "ms": 277141382415.94666 } }, "covered_min": 101, "window_min": 101, "qualifies": true }, { "local_date": "1978-10-14", "window": { "start": { "local": "1978-10-14T18:00:41+04:00", "utc": "1978-10-14T14:00:41Z", "ms": 277221641160.1637 }, "end": { "local": "1978-10-14T19:42:00+04:00", "utc": "1978-10-14T15:42:00Z", "ms": 277227720169.7735 } }, "covered_min": 0, "window_min": 101, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 15:28 on Fri 13 Oct to 13:25 on Sat 14 Oct.", "fact": "1978-10-13T11:28:23Z → 1978-10-14T09:25:13Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:02–19:43 on the 13th, 18:01–19:42 on the 14th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 101 of 101 minutes on the 13th and 0 of 101 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9217 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Friday 13 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-13", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Friday 13 October. Trayodaśī runs from 15:28 on Fri 13 Oct to 13:25 on Sat 14 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-10-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/karaka-chaturthi", "festival": "karaka-chaturthi", "name": "Karaka Caturthī", "everyday": "Karwa Chauth", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 41524, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-10-19T08:48:28+04:00", "utc": "1978-10-19T04:48:28Z", "ms": 277620508303.4534 }, "end": { "local": "1978-10-20T09:35:21+04:00", "utc": "1978-10-20T05:35:21Z", "ms": 277709721339.599 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-19T08:48:28+04:00", "utc": "1978-10-19T04:48:28Z", "ms": 277620508303.4534 }, "end": { "local": "1978-10-20T09:35:21+04:00", "utc": "1978-10-20T05:35:21Z", "ms": 277709721339.599 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-10-19", "window": { "start": { "local": "1978-10-19T20:21:59+04:00", "utc": "1978-10-19T16:21:59Z", "ms": 277662118685.5528 }, "end": { "local": "1978-10-19T20:21:59+04:00", "utc": "1978-10-19T16:21:59Z", "ms": 277662118685.5528 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-10-20", "window": { "start": { "local": "1978-10-20T21:07:25+04:00", "utc": "1978-10-20T17:07:25Z", "ms": 277751245383.6573 }, "end": { "local": "1978-10-20T21:07:25+04:00", "utc": "1978-10-20T17:07:25Z", "ms": 277751245383.6573 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 08:48 on Thu 19 Oct to 09:35 on Fri 20 Oct.", "fact": "1978-10-19T04:48:28Z → 1978-10-20T05:35:21Z" }, { "step": "kaala", "text": "Moonrise is at 20:22 on the 19th and 21:07 on the 20th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 19th and is not on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 41524 s" }, { "step": "ruling", "text": "Karaka Caturthī, Tehran, 1978: Thursday 19 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "karaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 4 Karaka caturthi (current at moon-rise, if occurs on two successive days, it is to be observed on the first day)" } ], "kaala": "moonrise", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-19", "confidence": "determinate" } ], "quote": "In Tehran, Karaka Caturthī (Karwa Chauth) 1978 falls on Thursday 19 October. Caturthī runs from 08:48 on Thu 19 Oct to 09:35 on Fri 20 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/karaka-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-10-19", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 41524, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-10-19T08:48:28+04:00", "utc": "1978-10-19T04:48:28Z", "ms": 277620508303.4534 }, "end": { "local": "1978-10-20T09:35:21+04:00", "utc": "1978-10-20T05:35:21Z", "ms": 277709721339.599 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-19T08:48:28+04:00", "utc": "1978-10-19T04:48:28Z", "ms": 277620508303.4534 }, "end": { "local": "1978-10-20T09:35:21+04:00", "utc": "1978-10-20T05:35:21Z", "ms": 277709721339.599 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-10-19", "window": { "start": { "local": "1978-10-19T20:21:59+04:00", "utc": "1978-10-19T16:21:59Z", "ms": 277662118685.5528 }, "end": { "local": "1978-10-19T20:21:59+04:00", "utc": "1978-10-19T16:21:59Z", "ms": 277662118685.5528 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-10-20", "window": { "start": { "local": "1978-10-20T21:07:25+04:00", "utc": "1978-10-20T17:07:25Z", "ms": 277751245383.6573 }, "end": { "local": "1978-10-20T21:07:25+04:00", "utc": "1978-10-20T17:07:25Z", "ms": 277751245383.6573 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 08:48 on Thu 19 Oct to 09:35 on Fri 20 Oct.", "fact": "1978-10-19T04:48:28Z → 1978-10-20T05:35:21Z" }, { "step": "kaala", "text": "Moonrise is at 20:22 on the 19th and 21:07 on the 20th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 19th and is not on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 41524 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Thursday 19 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-19", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Thursday 19 October. Caturthī runs from 08:48 on Thu 19 Oct to 09:35 on Fri 20 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-10-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ahoyi-ashtami", "festival": "ahoyi-ashtami", "name": "Ahoyī Aṣṭamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23939, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-10-23T15:18:25+04:00", "utc": "1978-10-23T11:18:25Z", "ms": 277989505327.0454 }, "end": { "local": "1978-10-24T17:50:11+04:00", "utc": "1978-10-24T13:50:11Z", "ms": 278085010950.7173 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-23T15:18:25+04:00", "utc": "1978-10-23T11:18:25Z", "ms": 277989505327.0454 }, "end": { "local": "1978-10-24T17:50:11+04:00", "utc": "1978-10-24T13:50:11Z", "ms": 278085010950.7173 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-10-23", "window": { "start": { "local": "1978-10-23T23:36:26+04:00", "utc": "1978-10-23T19:36:26Z", "ms": 278019385798.9647 }, "end": { "local": "1978-10-23T23:36:26+04:00", "utc": "1978-10-23T19:36:26Z", "ms": 278019385798.9647 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-10-24", "window": { "start": { "local": "1978-10-25T00:29:10+04:00", "utc": "1978-10-24T20:29:10Z", "ms": 278108949571.3439 }, "end": { "local": "1978-10-25T00:29:10+04:00", "utc": "1978-10-24T20:29:10Z", "ms": 278108949571.3439 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 15:18 on Mon 23 Oct to 17:50 on Tue 24 Oct.", "fact": "1978-10-23T11:18:25Z → 1978-10-24T13:50:11Z" }, { "step": "kaala", "text": "Moonrise is at 23:36 on the 23rd and 00:29 on the 24th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is on the 23rd and is not on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 23939 s" }, { "step": "ruling", "text": "Ahoyī Aṣṭamī, Tehran, 1978: Monday 23 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ahoyi-ashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Ahoyi astami (Gujerat) (current at moonrise), Karastami (Maharashtra). If occurs on two successive days, it is to be observed on the second day." } ], "kaala": "moonrise", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-23", "confidence": "determinate" } ], "quote": "In Tehran, Ahoyī Aṣṭamī 1978 falls on Monday 23 October. Aṣṭamī runs from 15:18 on Mon 23 Oct to 17:50 on Tue 24 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ahoyi-ashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-10-27", "festival": "ekadashi", "name": "Ramā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24339, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-10-26T22:27:26+04:00", "utc": "1978-10-26T18:27:26Z", "ms": 278274445828.2684 }, "end": { "local": "1978-10-28T00:06:37+04:00", "utc": "1978-10-27T20:06:37Z", "ms": 278366797094.96136 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-26T22:27:26+04:00", "utc": "1978-10-26T18:27:26Z", "ms": 278274445828.2684 }, "end": { "local": "1978-10-28T00:06:37+04:00", "utc": "1978-10-27T20:06:37Z", "ms": 278366797094.96136 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-10-27", "window": { "start": { "local": "1978-10-27T06:51:20+04:00", "utc": "1978-10-27T02:51:20Z", "ms": 278304680294.7629 }, "end": { "local": "1978-10-27T06:51:20+04:00", "utc": "1978-10-27T02:51:20Z", "ms": 278304680294.7629 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-10-28", "window": { "start": { "local": "1978-10-28T06:52:17+04:00", "utc": "1978-10-28T02:52:17Z", "ms": 278391136593.2068 }, "end": { "local": "1978-10-28T06:52:17+04:00", "utc": "1978-10-28T02:52:17Z", "ms": 278391136593.2068 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 22:27 on Thu 26 Oct to 00:07 on Sat 28 Oct.", "fact": "1978-10-26T18:27:26Z → 1978-10-27T20:06:37Z" }, { "step": "kaala", "text": "Sunrise is at 06:51 on the 27th and 06:52 on the 28th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 27th and is not on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 24339 s" }, { "step": "ruling", "text": "Ramā Ekādaśī, Tehran, 1978: Friday 27 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-27", "confidence": "determinate" } ], "quote": "In Tehran, Ramā Ekādaśī 1978 falls on Friday 27 October. Ekādaśī runs from 22:27 on Thu 26 Oct to 00:07 on Sat 28 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-10-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/govatsa-dvadashi", "festival": "govatsa-dvadashi", "name": "Govatsa Dvādaśī", "everyday": "Vasu Baras", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16614, "anga": { "type": "tithi", "index": 26, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-10-28T00:06:37+04:00", "utc": "1978-10-27T20:06:37Z", "ms": 278366797094.96136 }, "end": { "local": "1978-10-29T01:07:38+04:00", "utc": "1978-10-28T21:07:38Z", "ms": 278456857775.60333 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-28T00:06:37+04:00", "utc": "1978-10-27T20:06:37Z", "ms": 278366797094.96136 }, "end": { "local": "1978-10-29T01:07:38+04:00", "utc": "1978-10-28T21:07:38Z", "ms": 278456857775.60333 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-10-27", "window": { "start": { "local": "1978-10-27T17:44:43+04:00", "utc": "1978-10-27T13:44:43Z", "ms": 278343883126.65375 }, "end": { "local": "1978-10-27T19:29:44+04:00", "utc": "1978-10-27T15:29:44Z", "ms": 278350183588.86084 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1978-10-28", "window": { "start": { "local": "1978-10-28T17:43:37+04:00", "utc": "1978-10-28T13:43:37Z", "ms": 278430216641.70593 }, "end": { "local": "1978-10-28T19:28:54+04:00", "utc": "1978-10-28T15:28:54Z", "ms": 278436533521.7271 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 00:07 on Sat 28 Oct to 01:08 on Sun 29 Oct.", "fact": "1978-10-27T20:06:37Z → 1978-10-28T21:07:38Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:45–19:30 on the 27th, 17:44–19:29 on the 28th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during pradoṣa. It covers 0 of 105 minutes on the 27th and 105 of 105 on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 16614 s" }, { "step": "ruling", "text": "Govatsa Dvādaśī, Tehran, 1978: Saturday 28 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "govatsa-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 12 Govatsa dvadasi (pradosa vyapini). If occurs on two days, it is to be observed on the first day." } ], "kaala": "pradosha", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-28", "confidence": "determinate" } ], "quote": "In Tehran, Govatsa Dvādaśī (Vasu Baras) 1978 falls on Saturday 28 October. Dvādaśī runs from 00:07 on Sat 28 Oct to 01:08 on Sun 29 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/govatsa-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/yama-dipadana", "festival": "yama-dipadana", "name": "Yama Dīpadāna", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20324, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-10-29T01:07:38+04:00", "utc": "1978-10-28T21:07:38Z", "ms": 278456857775.60333 }, "end": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-29T01:07:38+04:00", "utc": "1978-10-28T21:07:38Z", "ms": 278456857775.60333 }, "end": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-10-28", "window": { "start": { "local": "1978-10-28T17:43:37+04:00", "utc": "1978-10-28T13:43:37Z", "ms": 278430216641.70593 }, "end": { "local": "1978-10-28T19:28:54+04:00", "utc": "1978-10-28T15:28:54Z", "ms": 278436533521.7271 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1978-10-29", "window": { "start": { "local": "1978-10-29T17:42:31+04:00", "utc": "1978-10-29T13:42:31Z", "ms": 278516551344.701 }, "end": { "local": "1978-10-29T19:28:05+04:00", "utc": "1978-10-29T15:28:05Z", "ms": 278522884529.35455 } }, "covered_min": 106, "window_min": 106, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:08 on Sun 29 Oct to 01:27 on Mon 30 Oct.", "fact": "1978-10-28T21:07:38Z → 1978-10-29T21:27:00Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:44–19:29 on the 28th, 17:43–19:28 on the 29th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 105 minutes on the 28th and 106 of 106 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 20324 s" }, { "step": "ruling", "text": "Yama Dīpadāna, Tehran, 1978: Sunday 29 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "yama-dipadana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 13 Yama dipadana (pradosa)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-29", "confidence": "determinate" } ], "quote": "In Tehran, Yama Dīpadāna 1978 falls on Sunday 29 October. Trayodaśī runs from 01:08 on Sun 29 Oct to 01:27 on Mon 30 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/yama-dipadana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-10-29", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20324, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-10-29T01:07:38+04:00", "utc": "1978-10-28T21:07:38Z", "ms": 278456857775.60333 }, "end": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-29T01:07:38+04:00", "utc": "1978-10-28T21:07:38Z", "ms": 278456857775.60333 }, "end": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-10-28", "window": { "start": { "local": "1978-10-28T17:43:37+04:00", "utc": "1978-10-28T13:43:37Z", "ms": 278430216641.70593 }, "end": { "local": "1978-10-28T19:28:54+04:00", "utc": "1978-10-28T15:28:54Z", "ms": 278436533521.7271 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1978-10-29", "window": { "start": { "local": "1978-10-29T17:42:31+04:00", "utc": "1978-10-29T13:42:31Z", "ms": 278516551344.701 }, "end": { "local": "1978-10-29T19:28:05+04:00", "utc": "1978-10-29T15:28:05Z", "ms": 278522884529.35455 } }, "covered_min": 106, "window_min": 106, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:08 on Sun 29 Oct to 01:27 on Mon 30 Oct.", "fact": "1978-10-28T21:07:38Z → 1978-10-29T21:27:00Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:44–19:29 on the 28th, 17:43–19:28 on the 29th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 105 minutes on the 28th and 106 of 106 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 20324 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Sunday 29 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-29", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Sunday 29 October. Trayodaśī runs from 01:08 on Sun 29 Oct to 01:27 on Mon 30 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-10-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/naraka-chaturdashi", "festival": "naraka-chaturdashi", "name": "Naraka Caturdaśī", "everyday": "Choti Diwali", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13297, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 }, "end": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 }, "end": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 } }, "kaala": "arunodaya", "days": [ { "local_date": "1978-10-30", "window": { "start": { "local": "1978-10-30T05:08:37+04:00", "utc": "1978-10-30T01:08:37Z", "ms": 278557717044.94916 }, "end": { "local": "1978-10-30T06:54:10+04:00", "utc": "1978-10-30T02:54:10Z", "ms": 278564050229.6027 } }, "covered_min": 106, "window_min": 106, "qualifies": true }, { "local_date": "1978-10-31", "window": { "start": { "local": "1978-10-31T05:09:18+04:00", "utc": "1978-10-31T01:09:18Z", "ms": 278644158172.9079 }, "end": { "local": "1978-10-31T06:55:08+04:00", "utc": "1978-10-31T02:55:08Z", "ms": 278650507543.3476 } }, "covered_min": 0, "window_min": 106, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 01:27 on Mon 30 Oct to 01:05 on Tue 31 Oct.", "fact": "1978-10-29T21:27:00Z → 1978-10-30T21:05:21Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:09–06:54 on the 30th, 05:09–06:55 on the 31st.", "fact": "arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during aruṇodaya. It covers 106 of 106 minutes on the 30th and 0 of 106 on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one dawn qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 13297 s" }, { "step": "ruling", "text": "Naraka Caturdaśī, Tehran, 1978: Monday 30 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "naraka-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Naraka caturdasi (covering a period of 4 ghatikas before sunrise, if occurs on two successive days, it is to be observed on the first day)" } ], "kaala": "arunodaya", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-30", "confidence": "determinate" } ], "quote": "In Tehran, Naraka Caturdaśī (Choti Diwali) 1978 falls on Monday 30 October. Caturdaśī runs from 01:27 on Mon 30 Oct to 01:05 on Tue 31 Oct and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/tehran/festivals/1978/naraka-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-10-30", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1384, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 }, "end": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-30T01:27:00+04:00", "utc": "1978-10-29T21:27:00Z", "ms": 278544420079.29614 }, "end": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 } }, "kaala": "nishita", "days": [ { "local_date": "1978-10-29", "window": { "start": { "local": "1978-10-29T23:54:21+04:00", "utc": "1978-10-29T19:54:21Z", "ms": 278538860787.15186 }, "end": { "local": "1978-10-30T00:42:21+04:00", "utc": "1978-10-29T20:42:21Z", "ms": 278541740787.15186 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-10-30", "window": { "start": { "local": "1978-10-30T23:54:17+04:00", "utc": "1978-10-30T19:54:17Z", "ms": 278625257404.19867 }, "end": { "local": "1978-10-31T00:42:17+04:00", "utc": "1978-10-30T20:42:17Z", "ms": 278628137404.19867 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 01:27 on Mon 30 Oct to 01:05 on Tue 31 Oct.", "fact": "1978-10-29T21:27:00Z → 1978-10-30T21:05:21Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:54–00:42 on the 29th, 23:54–00:42 on the 30th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 29th and 48 of 48 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1384 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Monday 30 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-30", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Monday 30 October. Caturdaśī runs from 01:27 on Mon 30 Oct to 01:05 on Tue 31 Oct and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-10-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/diwali-lakshmi-puja", "festival": "diwali-lakshmi-puja", "name": "Lakṣmī Pūjā", "everyday": "Diwali", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16801, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 }, "end": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 }, "end": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-10-30", "window": { "start": { "local": "1978-10-30T17:41:27+04:00", "utc": "1978-10-30T13:41:27Z", "ms": 278602887265.04974 }, "end": { "local": "1978-10-30T19:27:17+04:00", "utc": "1978-10-30T15:27:17Z", "ms": 278609236635.48944 } }, "covered_min": 0, "window_min": 106, "qualifies": false }, { "local_date": "1978-10-31", "window": { "start": { "local": "1978-10-31T17:40:24+04:00", "utc": "1978-10-31T13:40:24Z", "ms": 278689224431.4193 }, "end": { "local": "1978-10-31T19:26:30+04:00", "utc": "1978-10-31T15:26:30Z", "ms": 278695589862.9716 } }, "covered_min": 106, "window_min": 106, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 01:05 on Tue 31 Oct to 00:07 on Wed 1 Nov.", "fact": "1978-10-30T21:05:21Z → 1978-10-31T20:06:31Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:41–19:27 on the 30th, 17:40–19:26 on the 31st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during pradoṣa. It covers 0 of 106 minutes on the 30th and 106 of 106 on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 16801 s" }, { "step": "ruling", "text": "Lakṣmī Pūjā, Tehran, 1978: Tuesday 31 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "diwali-lakshmi-puja", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 30 Kali puja (nisithavyapini), Dipavali or Diwali (pradosa), Mahalaksmipuja (pradosa)" } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-31", "confidence": "determinate" } ], "quote": "In Tehran, Lakṣmī Pūjā (Diwali) 1978 falls on Tuesday 31 October. Amāvasyā runs from 01:05 on Tue 31 Oct to 00:07 on Wed 1 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/diwali-lakshmi-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/kali-puja", "festival": "kali-puja", "name": "Kālī Pūjā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-10-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 737, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 }, "end": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-10-31T01:05:21+04:00", "utc": "1978-10-30T21:05:21Z", "ms": 278629521287.70807 }, "end": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 } }, "kaala": "nishita", "days": [ { "local_date": "1978-10-30", "window": { "start": { "local": "1978-10-30T23:54:17+04:00", "utc": "1978-10-30T19:54:17Z", "ms": 278625257404.19867 }, "end": { "local": "1978-10-31T00:42:17+04:00", "utc": "1978-10-30T20:42:17Z", "ms": 278628137404.19867 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-10-31", "window": { "start": { "local": "1978-10-31T23:54:15+04:00", "utc": "1978-10-31T19:54:15Z", "ms": 278711654799.7405 }, "end": { "local": "1978-11-01T00:42:15+04:00", "utc": "1978-10-31T20:42:15Z", "ms": 278714534799.7405 } }, "covered_min": 12, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 01:05 on Tue 31 Oct to 00:07 on Wed 1 Nov.", "fact": "1978-10-30T21:05:21Z → 1978-10-31T20:06:31Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:54–00:42 on the 30th, 23:54–00:42 on the 31st.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during niśītha. It covers 0 of 48 minutes on the 30th and 12 of 48 on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 737 s" }, { "step": "ruling", "text": "Kālī Pūjā, Tehran, 1978: Tuesday 31 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "kali-puja", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 30 Kali puja (nisithavyapini), Dipavali or Diwali (pradosa), Mahalaksmipuja (pradosa)" } ], "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-10-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-10-31", "confidence": "determinate" } ], "quote": "In Tehran, Kālī Pūjā 1978 falls on Tuesday 31 October. Amāvasyā runs from 01:05 on Tue 31 Oct to 00:07 on Wed 1 Nov and covers 12 of 48 minutes of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/kali-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/govardhana-puja", "festival": "govardhana-puja", "name": "Govardhana Pūjā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35687, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "end": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "end": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-10-31", "window": { "start": { "local": "1978-10-31T11:53:46+04:00", "utc": "1978-10-31T07:53:46Z", "ms": 278668425987.3834 }, "end": { "local": "1978-10-31T12:41:46+04:00", "utc": "1978-10-31T08:41:46Z", "ms": 278671305987.3834 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-11-01", "window": { "start": { "local": "1978-11-01T11:53:44+04:00", "utc": "1978-11-01T07:53:44Z", "ms": 278754824019.94806 }, "end": { "local": "1978-11-01T12:41:44+04:00", "utc": "1978-11-01T08:41:44Z", "ms": 278757704019.94806 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 00:07 on Wed 1 Nov to 22:37 on Wed 1 Nov.", "fact": "1978-10-31T20:06:31Z → 1978-11-01T18:36:31Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 31st, 11:54–12:42 on the 1st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during madhyāhna. It covers 0 of 48 minutes on the 31st and 48 of 48 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 35687 s" }, { "step": "ruling", "text": "Govardhana Pūjā, Tehran, 1978: Wednesday 1 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "govardhana-puja", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 1 Govardhana puja, Annakuta [purvaviddha], Balidaityaraja puja (pradosa), Dyuta pratipad (purvahna)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-01", "confidence": "determinate" } ], "quote": "In Tehran, Govardhana Pūjā 1978 falls on Wednesday 1 November. Pratipadā runs from 00:07 on Wed 1 Nov to 22:37 on Wed 1 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/govardhana-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/bali-puja", "festival": "bali-puja", "name": "Bali Pūjā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11446, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "end": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "end": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-10-31", "window": { "start": { "local": "1978-10-31T17:40:24+04:00", "utc": "1978-10-31T13:40:24Z", "ms": 278689224431.4193 }, "end": { "local": "1978-10-31T19:26:30+04:00", "utc": "1978-10-31T15:26:30Z", "ms": 278695589862.9716 } }, "covered_min": 0, "window_min": 106, "qualifies": false }, { "local_date": "1978-11-01", "window": { "start": { "local": "1978-11-01T17:39:23+04:00", "utc": "1978-11-01T13:39:23Z", "ms": 278775562871.8345 }, "end": { "local": "1978-11-01T19:25:44+04:00", "utc": "1978-11-01T15:25:44Z", "ms": 278781944233.8316 } }, "covered_min": 106, "window_min": 106, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 00:07 on Wed 1 Nov to 22:37 on Wed 1 Nov.", "fact": "1978-10-31T20:06:31Z → 1978-11-01T18:36:31Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:40–19:26 on the 31st, 17:39–19:26 on the 1st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pradoṣa. It covers 0 of 106 minutes on the 31st and 106 of 106 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11446 s" }, { "step": "ruling", "text": "Bali Pūjā, Tehran, 1978: Wednesday 1 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bali-puja", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 1 Govardhana puja, Annakuta [purvaviddha], Balidaityaraja puja (pradosa), Dyuta pratipad (purvahna)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-01", "confidence": "determinate" } ], "quote": "In Tehran, Bali Pūjā 1978 falls on Wednesday 1 November. Pratipadā runs from 00:07 on Wed 1 Nov to 22:37 on Wed 1 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/bali-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/dyuta-pratipad", "festival": "dyuta-pratipad", "name": "Dyūta Pratipad", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24574, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "end": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-01T00:06:31+04:00", "utc": "1978-10-31T20:06:31Z", "ms": 278712391305.6291 }, "end": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 } }, "kaala": "purvahna", "days": [ { "local_date": "1978-11-01", "window": { "start": { "local": "1978-11-01T06:56:05+04:00", "utc": "1978-11-01T02:56:05Z", "ms": 278736965168.06165 }, "end": { "local": "1978-11-01T10:30:31+04:00", "utc": "1978-11-01T06:30:31Z", "ms": 278749831069.3193 } }, "covered_min": 214, "window_min": 214, "qualifies": true }, { "local_date": "1978-11-02", "window": { "start": { "local": "1978-11-02T06:57:03+04:00", "utc": "1978-11-02T02:57:03Z", "ms": 278823423086.8129 }, "end": { "local": "1978-11-02T10:30:50+04:00", "utc": "1978-11-02T06:30:50Z", "ms": 278836249595.82404 } }, "covered_min": 0, "window_min": 214, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 00:07 on Wed 1 Nov to 22:37 on Wed 1 Nov.", "fact": "1978-10-31T20:06:31Z → 1978-11-01T18:36:31Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:56–10:31 on the 1st, 06:57–10:31 on the 2nd.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pūrvāhṇa. It covers 214 of 214 minutes on the 1st and 0 of 214 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one forenoon qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 24574 s" }, { "step": "ruling", "text": "Dyūta Pratipad, Tehran, 1978: Wednesday 1 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "dyuta-pratipad", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 1 Govardhana puja, Annakuta [purvaviddha], Balidaityaraja puja (pradosa), Dyuta pratipad (purvahna)." } ], "kaala": "purvahna", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-01", "confidence": "determinate" } ], "quote": "In Tehran, Dyūta Pratipad 1978 falls on Wednesday 1 November. Pratipadā runs from 00:07 on Wed 1 Nov to 22:37 on Wed 1 Nov and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/tehran/festivals/1978/dyuta-pratipad", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/yama-dvitiya", "festival": "yama-dvitiya", "name": "Yama Dvitīyā", "everyday": "Bhai Dooj", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28849, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 }, "end": { "local": "1978-11-02T20:42:32+04:00", "utc": "1978-11-02T16:42:32Z", "ms": 278872951974.18976 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-01T22:36:31+04:00", "utc": "1978-11-01T18:36:31Z", "ms": 278793390638.82684 }, "end": { "local": "1978-11-02T20:42:32+04:00", "utc": "1978-11-02T16:42:32Z", "ms": 278872951974.18976 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-11-01", "window": { "start": { "local": "1978-11-01T11:53:44+04:00", "utc": "1978-11-01T07:53:44Z", "ms": 278754824019.94806 }, "end": { "local": "1978-11-01T12:41:44+04:00", "utc": "1978-11-01T08:41:44Z", "ms": 278757704019.94806 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-11-02", "window": { "start": { "local": "1978-11-02T11:53:43+04:00", "utc": "1978-11-02T07:53:43Z", "ms": 278841222850.3296 }, "end": { "local": "1978-11-02T12:41:43+04:00", "utc": "1978-11-02T08:41:43Z", "ms": 278844102850.3296 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 22:37 on Wed 1 Nov to 20:43 on Thu 2 Nov.", "fact": "1978-11-01T18:36:31Z → 1978-11-02T16:42:32Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 1st, 11:54–12:42 on the 2nd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvitīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 1st and 48 of 48 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 28849 s" }, { "step": "ruling", "text": "Yama Dvitīyā, Tehran, 1978: Thursday 2 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "yama-dvitiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 2 Bhratrdvitiya, Yamadvitiya (madhyahna, purvaviddha), Masyadhara (Dwat) puja (Bihar)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-02", "confidence": "determinate" } ], "quote": "In Tehran, Yama Dvitīyā (Bhai Dooj) 1978 falls on Thursday 2 November. Dvitīyā runs from 22:37 on Wed 1 Nov to 20:43 on Thu 2 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/yama-dvitiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/naga-chaturthi", "festival": "naga-chaturthi", "name": "Nāga Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12664, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-11-03T18:32:11+04:00", "utc": "1978-11-03T14:32:11Z", "ms": 278951530988.9985 }, "end": { "local": "1978-11-04T16:12:47+04:00", "utc": "1978-11-04T12:12:47Z", "ms": 279029567326.3799 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-03T18:32:11+04:00", "utc": "1978-11-03T14:32:11Z", "ms": 278951530988.9985 }, "end": { "local": "1978-11-04T16:12:47+04:00", "utc": "1978-11-04T12:12:47Z", "ms": 279029567326.3799 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-11-03", "window": { "start": { "local": "1978-11-03T11:53:42+04:00", "utc": "1978-11-03T07:53:42Z", "ms": 278927622482.86536 }, "end": { "local": "1978-11-03T12:41:42+04:00", "utc": "1978-11-03T08:41:42Z", "ms": 278930502482.86536 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-11-04", "window": { "start": { "local": "1978-11-04T11:53:43+04:00", "utc": "1978-11-04T07:53:43Z", "ms": 279014022921.29376 }, "end": { "local": "1978-11-04T12:41:43+04:00", "utc": "1978-11-04T08:41:43Z", "ms": 279016902921.29376 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:32 on Fri 3 Nov to 16:13 on Sat 4 Nov.", "fact": "1978-11-03T14:32:11Z → 1978-11-04T12:12:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 3rd, 11:54–12:42 on the 4th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 3rd and 48 of 48 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 12664 s" }, { "step": "ruling", "text": "Nāga Caturthī, Tehran, 1978: Saturday 4 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "naga-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 4 Naga caturthi (paraviddha and madhyahnavyapini)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-04", "confidence": "determinate" } ], "quote": "In Tehran, Nāga Caturthī 1978 falls on Saturday 4 November. Caturthī runs from 18:32 on Fri 3 Nov to 16:13 on Sat 4 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/naga-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-11-04", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12664, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-11-03T18:32:11+04:00", "utc": "1978-11-03T14:32:11Z", "ms": 278951530988.9985 }, "end": { "local": "1978-11-04T16:12:47+04:00", "utc": "1978-11-04T12:12:47Z", "ms": 279029567326.3799 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-03T18:32:11+04:00", "utc": "1978-11-03T14:32:11Z", "ms": 278951530988.9985 }, "end": { "local": "1978-11-04T16:12:47+04:00", "utc": "1978-11-04T12:12:47Z", "ms": 279029567326.3799 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-11-03", "window": { "start": { "local": "1978-11-03T11:53:42+04:00", "utc": "1978-11-03T07:53:42Z", "ms": 278927622482.86536 }, "end": { "local": "1978-11-03T12:41:42+04:00", "utc": "1978-11-03T08:41:42Z", "ms": 278930502482.86536 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-11-04", "window": { "start": { "local": "1978-11-04T11:53:43+04:00", "utc": "1978-11-04T07:53:43Z", "ms": 279014022921.29376 }, "end": { "local": "1978-11-04T12:41:43+04:00", "utc": "1978-11-04T08:41:43Z", "ms": 279016902921.29376 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:32 on Fri 3 Nov to 16:13 on Sat 4 Nov.", "fact": "1978-11-03T14:32:11Z → 1978-11-04T12:12:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 3rd, 11:54–12:42 on the 4th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 3rd and 48 of 48 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 12664 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Saturday 4 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-04", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Saturday 4 November. Caturthī runs from 18:32 on Fri 3 Nov to 16:13 on Sat 4 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-11-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/surya-shashthi", "festival": "surya-shashthi", "name": "Sūrya Ṣaṣṭhī", "everyday": "Chhath", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1304, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-11-05T13:50:55+04:00", "utc": "1978-11-05T09:50:55Z", "ms": 279107455019.23846 }, "end": { "local": "1978-11-06T11:32:02+04:00", "utc": "1978-11-06T07:32:02Z", "ms": 279185522000.2818 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-05T13:50:55+04:00", "utc": "1978-11-05T09:50:55Z", "ms": 279107455019.23846 }, "end": { "local": "1978-11-06T11:32:02+04:00", "utc": "1978-11-06T07:32:02Z", "ms": 279185522000.2818 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-11-05", "window": { "start": { "local": "1978-11-05T11:53:44+04:00", "utc": "1978-11-05T07:53:44Z", "ms": 279100424169.0853 }, "end": { "local": "1978-11-05T12:41:44+04:00", "utc": "1978-11-05T08:41:44Z", "ms": 279103304169.0853 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-11-06", "window": { "start": { "local": "1978-11-06T11:53:46+04:00", "utc": "1978-11-06T07:53:46Z", "ms": 279186826229.7555 }, "end": { "local": "1978-11-06T12:41:46+04:00", "utc": "1978-11-06T08:41:46Z", "ms": 279189706229.7555 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 13:51 on Sun 5 Nov to 11:32 on Mon 6 Nov.", "fact": "1978-11-05T09:50:55Z → 1978-11-06T07:32:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 5th, 11:54–12:42 on the 6th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 5th and 0 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: unstated → second-day · margin 1304 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī, Tehran, 1978: Monday 6 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "surya-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Nadi sasthi, Skanda sasthi (Madras), Surya sasthi, Chhat (Bihar)." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-06", "confidence": "determinate" } ], "quote": "In Tehran, Sūrya Ṣaṣṭhī (Chhath) 1978 falls on Monday 6 November. Ṣaṣṭhī runs from 13:51 on Sun 5 Nov to 11:32 on Mon 6 Nov, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/tehran/festivals/1978/surya-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/gopashtami", "festival": "gopashtami", "name": "Gopāṣṭamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9210, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1978-11-07T09:20:19+04:00", "utc": "1978-11-07T05:20:19Z", "ms": 279264019443.6693 }, "end": { "local": "1978-11-08T07:18:42+04:00", "utc": "1978-11-08T03:18:42Z", "ms": 279343122372.57336 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-07T09:20:19+04:00", "utc": "1978-11-07T05:20:19Z", "ms": 279264019443.6693 }, "end": { "local": "1978-11-08T07:18:42+04:00", "utc": "1978-11-08T03:18:42Z", "ms": 279343122372.57336 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-11-07", "window": { "start": { "local": "1978-11-07T11:53:49+04:00", "utc": "1978-11-07T07:53:49Z", "ms": 279273229107.08704 }, "end": { "local": "1978-11-07T12:41:49+04:00", "utc": "1978-11-07T08:41:49Z", "ms": 279276109107.08704 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-11-08", "window": { "start": { "local": "1978-11-08T11:53:53+04:00", "utc": "1978-11-08T07:53:53Z", "ms": 279359632805.2377 }, "end": { "local": "1978-11-08T12:41:53+04:00", "utc": "1978-11-08T08:41:53Z", "ms": 279362512805.2377 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 09:20 on Tue 7 Nov to 07:19 on Wed 8 Nov.", "fact": "1978-11-07T05:20:19Z → 1978-11-08T03:18:42Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 7th, 11:54–12:42 on the 8th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 7th and 0 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9210 s" }, { "step": "ruling", "text": "Gopāṣṭamī, Tehran, 1978: Tuesday 7 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "gopashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 8 Gopastami, Gosthastami." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-07", "confidence": "determinate" } ], "quote": "In Tehran, Gopāṣṭamī 1978 falls on Tuesday 7 November. Aṣṭamī runs from 09:20 on Tue 7 Nov to 07:19 on Wed 8 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/gopashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/akshaya-navami", "festival": "akshaya-navami", "name": "Akṣaya Navamī", "everyday": "Amla Navami", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 947, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1978-11-08T07:18:42+04:00", "utc": "1978-11-08T03:18:42Z", "ms": 279343122372.57336 }, "end": { "local": "1978-11-09T05:29:02+04:00", "utc": "1978-11-09T01:29:02Z", "ms": 279422942353.4983 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-08T07:18:42+04:00", "utc": "1978-11-08T03:18:42Z", "ms": 279343122372.57336 }, "end": { "local": "1978-11-09T05:29:02+04:00", "utc": "1978-11-09T01:29:02Z", "ms": 279422942353.4983 } }, "kaala": "purvahna", "days": [ { "local_date": "1978-11-08", "window": { "start": { "local": "1978-11-08T07:02:56+04:00", "utc": "1978-11-08T03:02:56Z", "ms": 279342175647.2213 }, "end": { "local": "1978-11-08T10:32:54+04:00", "utc": "1978-11-08T06:32:54Z", "ms": 279354773752.56555 } }, "covered_min": 194, "window_min": 210, "qualifies": true }, { "local_date": "1978-11-09", "window": { "start": { "local": "1978-11-09T07:03:55+04:00", "utc": "1978-11-09T03:03:55Z", "ms": 279428635047.0198 }, "end": { "local": "1978-11-09T10:33:17+04:00", "utc": "1978-11-09T06:33:17Z", "ms": 279441196568.16003 } }, "covered_min": 0, "window_min": 209, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 07:19 on Wed 8 Nov to 05:29 on Thu 9 Nov.", "fact": "1978-11-08T03:18:42Z → 1978-11-09T01:29:02Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 07:03–10:33 on the 8th, 07:04–10:33 on the 9th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during pūrvāhṇa. It covers 194 of 210 minutes on the 8th and 0 of 209 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one forenoon qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 947 s" }, { "step": "ruling", "text": "Akṣaya Navamī, Tehran, 1978: Wednesday 8 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "akshaya-navami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 9 Aksaya navami (purvahnavyapini), Jagaddhatri puja (Bengal), (udayavyapini one muhurta), Anla navami (Orissa), Durga navami (purvaviddha), Gauri vrata." } ], "kaala": "purvahna", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-08", "confidence": "determinate" } ], "quote": "In Tehran, Akṣaya Navamī (Amla Navami) 1978 falls on Wednesday 8 November. Navamī runs from 07:19 on Wed 8 Nov to 05:29 on Thu 9 Nov and covers 194 of 210 minutes of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/tehran/festivals/1978/akshaya-navami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/durga-navami", "festival": "durga-navami", "name": "Durgā Navamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16510, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1978-11-08T07:18:42+04:00", "utc": "1978-11-08T03:18:42Z", "ms": 279343122372.57336 }, "end": { "local": "1978-11-09T05:29:02+04:00", "utc": "1978-11-09T01:29:02Z", "ms": 279422942353.4983 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-08T07:18:42+04:00", "utc": "1978-11-08T03:18:42Z", "ms": 279343122372.57336 }, "end": { "local": "1978-11-09T05:29:02+04:00", "utc": "1978-11-09T01:29:02Z", "ms": 279422942353.4983 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-11-08", "window": { "start": { "local": "1978-11-08T11:53:53+04:00", "utc": "1978-11-08T07:53:53Z", "ms": 279359632805.2377 }, "end": { "local": "1978-11-08T12:41:53+04:00", "utc": "1978-11-08T08:41:53Z", "ms": 279362512805.2377 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-11-09", "window": { "start": { "local": "1978-11-09T11:53:57+04:00", "utc": "1978-11-09T07:53:57Z", "ms": 279446037328.7301 }, "end": { "local": "1978-11-09T12:41:57+04:00", "utc": "1978-11-09T08:41:57Z", "ms": 279448917328.7301 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 07:19 on Wed 8 Nov to 05:29 on Thu 9 Nov.", "fact": "1978-11-08T03:18:42Z → 1978-11-09T01:29:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 8th, 11:54–12:42 on the 9th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 8th and 0 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 16510 s" }, { "step": "ruling", "text": "Durgā Navamī, Tehran, 1978: Wednesday 8 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "durga-navami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 9 Aksaya navami (purvahnavyapini), Jagaddhatri puja (Bengal), (udayavyapini one muhurta), Anla navami (Orissa), Durga navami (purvaviddha), Gauri vrata." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-08", "confidence": "determinate" } ], "quote": "In Tehran, Durgā Navamī 1978 falls on Wednesday 8 November. Navamī runs from 07:19 on Wed 8 Nov to 05:29 on Thu 9 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/durga-navami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-11-10", "festival": "ekadashi", "name": "Prabodhinī Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11544, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-11-10T03:52:31+04:00", "utc": "1978-11-09T23:52:31Z", "ms": 279503550943.7984 }, "end": { "local": "1978-11-11T02:00:10+03:30", "utc": "1978-11-10T22:30:10Z", "ms": 279585009564.7574 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-10T03:52:31+04:00", "utc": "1978-11-09T23:52:31Z", "ms": 279503550943.7984 }, "end": { "local": "1978-11-11T02:00:10+03:30", "utc": "1978-11-10T22:30:10Z", "ms": 279585009564.7574 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-11-10", "window": { "start": { "local": "1978-11-10T07:04:55+04:00", "utc": "1978-11-10T03:04:55Z", "ms": 279515094571.6484 }, "end": { "local": "1978-11-10T07:04:55+04:00", "utc": "1978-11-10T03:04:55Z", "ms": 279515094571.6484 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1978-11-11", "window": { "start": { "local": "1978-11-11T06:35:54+03:30", "utc": "1978-11-11T03:05:54Z", "ms": 279601554199.5977 }, "end": { "local": "1978-11-11T06:35:54+03:30", "utc": "1978-11-11T03:05:54Z", "ms": 279601554199.5977 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:53 on Fri 10 Nov to 02:00 on Sat 11 Nov.", "fact": "1978-11-09T23:52:31Z → 1978-11-10T22:30:10Z" }, { "step": "kaala", "text": "Sunrise is at 07:05 on the 10th and 06:36 on the 11th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 10th and is not on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 11544 s" }, { "step": "ruling", "text": "Prabodhinī Ekādaśī, Tehran, 1978: Friday 10 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-10", "confidence": "determinate" } ], "quote": "In Tehran, Prabodhinī Ekādaśī 1978 falls on Friday 10 November. Ekādaśī runs from 03:53 on Fri 10 Nov to 02:00 on Sat 11 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-11-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-11-12", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18917, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-11-12T00:53:19+03:30", "utc": "1978-11-11T21:23:19Z", "ms": 279667399035.4932 }, "end": { "local": "1978-11-13T00:04:01+03:30", "utc": "1978-11-12T20:34:01Z", "ms": 279750841335.5682 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-12T00:53:19+03:30", "utc": "1978-11-11T21:23:19Z", "ms": 279667399035.4932 }, "end": { "local": "1978-11-13T00:04:01+03:30", "utc": "1978-11-12T20:34:01Z", "ms": 279750841335.5682 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-11-11", "window": { "start": { "local": "1978-11-11T17:00:24+03:30", "utc": "1978-11-11T13:30:24Z", "ms": 279639023542.3007 }, "end": { "local": "1978-11-11T18:49:16+03:30", "utc": "1978-11-11T15:19:16Z", "ms": 279645555591.20844 } }, "covered_min": 0, "window_min": 109, "qualifies": false }, { "local_date": "1978-11-12", "window": { "start": { "local": "1978-11-12T16:59:38+03:30", "utc": "1978-11-12T13:29:38Z", "ms": 279725377889.3725 }, "end": { "local": "1978-11-12T18:48:44+03:30", "utc": "1978-11-12T15:18:44Z", "ms": 279731923994.4987 } }, "covered_min": 109, "window_min": 109, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 00:53 on Sun 12 Nov to 00:04 on Mon 13 Nov.", "fact": "1978-11-11T21:23:19Z → 1978-11-12T20:34:01Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:00–18:49 on the 11th, 17:00–18:49 on the 12th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 109 minutes on the 11th and 109 of 109 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18917 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Sunday 12 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-12", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Sunday 12 November. Trayodaśī runs from 00:53 on Sun 12 Nov to 00:04 on Mon 13 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-11-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/kartiki-purnima", "festival": "kartiki-purnima", "name": "Kārtikī Pūrṇimā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 40655, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-11-13T23:35:07+03:30", "utc": "1978-11-13T20:05:07Z", "ms": 279835507432.119 }, "end": { "local": "1978-11-14T23:30:07+03:30", "utc": "1978-11-14T20:00:07Z", "ms": 279921607319.1386 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-13T23:35:07+03:30", "utc": "1978-11-13T20:05:07Z", "ms": 279835507432.119 }, "end": { "local": "1978-11-14T23:30:07+03:30", "utc": "1978-11-14T20:00:07Z", "ms": 279921607319.1386 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-11-13", "window": { "start": { "local": "1978-11-13T11:24:24+03:30", "utc": "1978-11-13T07:54:24Z", "ms": 279791663771.4989 }, "end": { "local": "1978-11-13T12:12:24+03:30", "utc": "1978-11-13T08:42:24Z", "ms": 279794543771.4989 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-11-14", "window": { "start": { "local": "1978-11-14T11:24:32+03:30", "utc": "1978-11-14T07:54:32Z", "ms": 279878072491.2937 }, "end": { "local": "1978-11-14T12:12:32+03:30", "utc": "1978-11-14T08:42:32Z", "ms": 279880952491.2937 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 23:35 on Mon 13 Nov to 23:30 on Tue 14 Nov.", "fact": "1978-11-13T20:05:07Z → 1978-11-14T20:00:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:24–12:12 on the 13th, 11:25–12:13 on the 14th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 13th and 48 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 40655 s" }, { "step": "ruling", "text": "Kārtikī Pūrṇimā, Tehran, 1978: Tuesday 14 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "kartiki-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Rasayatra, (nisithavyapini, i.e. covering a period from 24 minutes before to 24 minutes after midnight. If occurs on two days or does not occur on any day, it is to be observed on the second day), Puskar Fair. Ratha yatra (Jain), Tripurotsava (evening), Kedara vrata (Orissa), Kartiki purnima." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-14", "confidence": "determinate" } ], "quote": "In Tehran, Kārtikī Pūrṇimā 1978 falls on Tuesday 14 November. Pūrṇimā runs from 23:35 on Mon 13 Nov to 23:30 on Tue 14 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/kartiki-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/rasayatra", "festival": "rasayatra", "name": "Rāsayātrā", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 305, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-11-13T23:35:07+03:30", "utc": "1978-11-13T20:05:07Z", "ms": 279835507432.119 }, "end": { "local": "1978-11-14T23:30:07+03:30", "utc": "1978-11-14T20:00:07Z", "ms": 279921607319.1386 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1978-11-13T23:35:07+03:30", "utc": "1978-11-13T20:05:07Z", "ms": 279835507432.119 }, "end": { "local": "1978-11-14T23:30:07+03:30", "utc": "1978-11-14T20:00:07Z", "ms": 279921607319.1386 } }, "kaala": "nishita", "days": [ { "local_date": "1978-11-13", "window": { "start": { "local": "1978-11-13T23:24:54+03:30", "utc": "1978-11-13T19:54:54Z", "ms": 279834893673.7783 }, "end": { "local": "1978-11-14T00:12:54+03:30", "utc": "1978-11-13T20:42:54Z", "ms": 279837773673.7783 } }, "covered_min": 38, "window_min": 48, "qualifies": true }, { "local_date": "1978-11-14", "window": { "start": { "local": "1978-11-14T23:25:02+03:30", "utc": "1978-11-14T19:55:02Z", "ms": 279921302399.14526 }, "end": { "local": "1978-11-15T00:13:02+03:30", "utc": "1978-11-14T20:43:02Z", "ms": 279924182399.14526 } }, "covered_min": 5, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 23:35 on Mon 13 Nov to 23:30 on Tue 14 Nov.", "fact": "1978-11-13T20:05:07Z → 1978-11-14T20:00:07Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:25–00:13 on the 13th, 23:25–00:13 on the 14th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during niśītha. It covers 38 of 48 minutes on the 13th and 5 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Both nights qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 305 s" }, { "step": "ruling", "text": "Rāsayātrā, Tehran, 1978: Tuesday 14 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rasayatra", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Rasayatra, (nisithavyapini, i.e. covering a period from 24 minutes before to 24 minutes after midnight. If occurs on two days or does not occur on any day, it is to be observed on the second day), Puskar Fair. Ratha yatra (Jain), Tripurotsava (evening), Kedara vrata (Orissa), Kartiki purnima." } ], "kaala": "nishita", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-14", "confidence": "determinate" } ], "quote": "In Tehran, Rāsayātrā 1978 falls on Tuesday 14 November. Pūrṇimā runs from 23:35 on Mon 13 Nov to 23:30 on Tue 14 Nov and covers 5 of 48 minutes of niśītha that night. It also reaches the previous night for 38 minutes; by the rule the second night is taken.", "cite": "https://ahargana.org/tehran/festivals/1978/rasayatra", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-11-18", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24877, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-11-18T02:10:52+03:30", "utc": "1978-11-17T22:40:52Z", "ms": 280190451501.4525 }, "end": { "local": "1978-11-19T04:06:16+03:30", "utc": "1978-11-19T00:36:16Z", "ms": 280283775689.0834 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-11-18T02:10:52+03:30", "utc": "1978-11-17T22:40:52Z", "ms": 280190451501.4525 }, "end": { "local": "1978-11-19T04:06:16+03:30", "utc": "1978-11-19T00:36:16Z", "ms": 280283775689.0834 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-11-17", "window": { "start": { "local": "1978-11-17T19:16:14+03:30", "utc": "1978-11-17T15:46:14Z", "ms": 280165574296.79254 }, "end": { "local": "1978-11-17T19:16:14+03:30", "utc": "1978-11-17T15:46:14Z", "ms": 280165574296.79254 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-11-18", "window": { "start": { "local": "1978-11-18T20:05:36+03:30", "utc": "1978-11-18T16:35:36Z", "ms": 280254936182.0915 }, "end": { "local": "1978-11-18T20:05:36+03:30", "utc": "1978-11-18T16:35:36Z", "ms": 280254936182.0915 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:11 on Sat 18 Nov to 04:06 on Sun 19 Nov.", "fact": "1978-11-17T22:40:52Z → 1978-11-19T00:36:16Z" }, { "step": "kaala", "text": "Moonrise is at 19:16 on the 17th and 20:06 on the 18th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 17th and is on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 24877 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Saturday 18 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-18", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Saturday 18 November. Caturthī runs from 02:11 on Sat 18 Nov to 04:06 on Sun 19 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-11-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-11-26", "festival": "ekadashi", "name": "Utpannā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37423, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-11-25T17:13:29+03:30", "utc": "1978-11-25T13:43:29Z", "ms": 280849408710.2897 }, "end": { "local": "1978-11-26T17:40:23+03:30", "utc": "1978-11-26T14:10:23Z", "ms": 280937422856.2976 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-11-25T17:13:29+03:30", "utc": "1978-11-25T13:43:29Z", "ms": 280849408710.2897 }, "end": { "local": "1978-11-26T17:40:23+03:30", "utc": "1978-11-26T14:10:23Z", "ms": 280937422856.2976 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-11-25", "window": { "start": { "local": "1978-11-25T06:49:45+03:30", "utc": "1978-11-25T03:19:45Z", "ms": 280811985336.8644 }, "end": { "local": "1978-11-25T06:49:45+03:30", "utc": "1978-11-25T03:19:45Z", "ms": 280811985336.8644 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-11-26", "window": { "start": { "local": "1978-11-26T06:50:43+03:30", "utc": "1978-11-26T03:20:43Z", "ms": 280898443125.18536 }, "end": { "local": "1978-11-26T06:50:43+03:30", "utc": "1978-11-26T03:20:43Z", "ms": 280898443125.18536 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 17:13 on Sat 25 Nov to 17:40 on Sun 26 Nov.", "fact": "1978-11-25T13:43:29Z → 1978-11-26T14:10:23Z" }, { "step": "kaala", "text": "Sunrise is at 06:50 on the 25th and 06:51 on the 26th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 25th and is on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 37423 s" }, { "step": "ruling", "text": "Utpannā Ekādaśī, Tehran, 1978: Sunday 26 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-26", "confidence": "determinate" } ], "quote": "In Tehran, Utpannā Ekādaśī 1978 falls on Sunday 26 November. Ekādaśī runs from 17:13 on Sat 25 Nov to 17:40 on Sun 26 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-11-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-11-27", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1531, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-11-27T17:17:15+03:30", "utc": "1978-11-27T13:47:15Z", "ms": 281022435005.9818 }, "end": { "local": "1978-11-28T16:06:35+03:30", "utc": "1978-11-28T12:36:35Z", "ms": 281104594748.31274 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-11-27T17:17:15+03:30", "utc": "1978-11-27T13:47:15Z", "ms": 281022435005.9818 }, "end": { "local": "1978-11-28T16:06:35+03:30", "utc": "1978-11-28T12:36:35Z", "ms": 281104594748.31274 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-11-27", "window": { "start": { "local": "1978-11-27T16:51:44+03:30", "utc": "1978-11-27T13:21:44Z", "ms": 281020903918.0429 }, "end": { "local": "1978-11-27T18:43:51+03:30", "utc": "1978-11-27T15:13:51Z", "ms": 281027631045.945 } }, "covered_min": 87, "window_min": 112, "qualifies": true }, { "local_date": "1978-11-28", "window": { "start": { "local": "1978-11-28T16:51:27+03:30", "utc": "1978-11-28T13:21:27Z", "ms": 281107287403.1215 }, "end": { "local": "1978-11-28T18:43:44+03:30", "utc": "1978-11-28T15:13:44Z", "ms": 281114024248.6072 } }, "covered_min": 0, "window_min": 112, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 17:17 on Mon 27 Nov to 16:07 on Tue 28 Nov.", "fact": "1978-11-27T13:47:15Z → 1978-11-28T12:36:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 16:52–18:44 on the 27th, 16:51–18:44 on the 28th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 87 of 112 minutes on the 27th and 0 of 112 on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1531 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Monday 27 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-27", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Monday 27 November. Trayodaśī runs from 17:17 on Mon 27 Nov to 16:07 on Tue 28 Nov and covers 87 of 112 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-11-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-11-28", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-11-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26516, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-11-28T16:06:35+03:30", "utc": "1978-11-28T12:36:35Z", "ms": 281104594748.31274 }, "end": { "local": "1978-11-29T14:14:28+03:30", "utc": "1978-11-29T10:44:28Z", "ms": 281184268334.2261 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-11-28T16:06:35+03:30", "utc": "1978-11-28T12:36:35Z", "ms": 281104594748.31274 }, "end": { "local": "1978-11-29T14:14:28+03:30", "utc": "1978-11-29T10:44:28Z", "ms": 281184268334.2261 } }, "kaala": "nishita", "days": [ { "local_date": "1978-11-28", "window": { "start": { "local": "1978-11-28T23:28:31+03:30", "utc": "1978-11-28T19:58:31Z", "ms": 281131110573.69275 }, "end": { "local": "1978-11-29T00:16:31+03:30", "utc": "1978-11-28T20:46:31Z", "ms": 281133990573.69275 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-11-29", "window": { "start": { "local": "1978-11-29T23:28:51+03:30", "utc": "1978-11-29T19:58:51Z", "ms": 281217531198.4575 }, "end": { "local": "1978-11-30T00:16:51+03:30", "utc": "1978-11-29T20:46:51Z", "ms": 281220411198.4575 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 16:07 on Tue 28 Nov to 14:14 on Wed 29 Nov.", "fact": "1978-11-28T12:36:35Z → 1978-11-29T10:44:28Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:29–00:17 on the 28th, 23:29–00:17 on the 29th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 28th and 0 of 48 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 26516 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Tuesday 28 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-11-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-11-28", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Tuesday 28 November. Caturdaśī runs from 16:07 on Tue 28 Nov to 14:14 on Wed 29 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-11-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/vinayaka-chaturthi?on=1978-12-03", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30800, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-12-03T02:56:34+03:30", "utc": "1978-12-02T23:26:34Z", "ms": 281489193922.8197 }, "end": { "local": "1978-12-03T23:59:04+03:30", "utc": "1978-12-03T20:29:04Z", "ms": 281564943818.92896 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-03T02:56:34+03:30", "utc": "1978-12-02T23:26:34Z", "ms": 281489193922.8197 }, "end": { "local": "1978-12-03T23:59:04+03:30", "utc": "1978-12-03T20:29:04Z", "ms": 281564943818.92896 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-12-03", "window": { "start": { "local": "1978-12-03T11:29:54+03:30", "utc": "1978-12-03T07:59:54Z", "ms": 281519993705.64087 }, "end": { "local": "1978-12-03T12:17:54+03:30", "utc": "1978-12-03T08:47:54Z", "ms": 281522873705.64087 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1978-12-04", "window": { "start": { "local": "1978-12-04T11:30:18+03:30", "utc": "1978-12-04T08:00:18Z", "ms": 281606417862.9634 }, "end": { "local": "1978-12-04T12:18:18+03:30", "utc": "1978-12-04T08:48:18Z", "ms": 281609297862.9634 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:57 on Sun 3 Dec to 23:59 on Sun 3 Dec.", "fact": "1978-12-02T23:26:34Z → 1978-12-03T20:29:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:30–12:18 on the 3rd, 11:30–12:18 on the 4th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 3rd and 0 of 48 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 30800 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Tehran, 1978: Sunday 3 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-03", "confidence": "determinate" } ], "quote": "In Tehran, Vināyaka Caturthī 1978 falls on Sunday 3 December. Caturthī runs from 02:57 on Sun 3 Dec to 23:59 on Sun 3 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/vinayaka-chaturthi?on=1978-12-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/naga-panchami-margashirsha", "festival": "naga-panchami-margashirsha", "name": "Nāga Pañcamī (Mārgaśīrṣa)", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32242, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1978-12-03T23:59:04+03:30", "utc": "1978-12-03T20:29:04Z", "ms": 281564943818.92896 }, "end": { "local": "1978-12-04T21:15:40+03:30", "utc": "1978-12-04T17:45:40Z", "ms": 281641539924.3479 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-03T23:59:04+03:30", "utc": "1978-12-03T20:29:04Z", "ms": 281564943818.92896 }, "end": { "local": "1978-12-04T21:15:40+03:30", "utc": "1978-12-04T17:45:40Z", "ms": 281641539924.3479 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-12-03", "window": { "start": { "local": "1978-12-03T11:29:54+03:30", "utc": "1978-12-03T07:59:54Z", "ms": 281519993705.64087 }, "end": { "local": "1978-12-03T12:17:54+03:30", "utc": "1978-12-03T08:47:54Z", "ms": 281522873705.64087 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-12-04", "window": { "start": { "local": "1978-12-04T11:30:18+03:30", "utc": "1978-12-04T08:00:18Z", "ms": 281606417862.9634 }, "end": { "local": "1978-12-04T12:18:18+03:30", "utc": "1978-12-04T08:48:18Z", "ms": 281609297862.9634 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 23:59 on Sun 3 Dec to 21:16 on Mon 4 Dec.", "fact": "1978-12-03T20:29:04Z → 1978-12-04T17:45:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:30–12:18 on the 3rd, 11:30–12:18 on the 4th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 3rd and 48 of 48 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 32242 s" }, { "step": "ruling", "text": "Nāga Pañcamī (Mārgaśīrṣa), Tehran, 1978: Monday 4 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "naga-panchami-margashirsha", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Naga pancami (2nd) (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-04", "confidence": "determinate" } ], "quote": "In Tehran, Nāga Pañcamī (Mārgaśīrṣa) 1978 falls on Monday 4 December. Pañcamī runs from 23:59 on Sun 3 Dec to 21:16 on Mon 4 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/naga-panchami-margashirsha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/champa-shashthi", "festival": "champa-shashthi", "name": "Campā Ṣaṣṭhī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23624, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-12-04T21:15:40+03:30", "utc": "1978-12-04T17:45:40Z", "ms": 281641539924.3479 }, "end": { "local": "1978-12-05T18:52:27+03:30", "utc": "1978-12-05T15:22:27Z", "ms": 281719346950.2179 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-04T21:15:40+03:30", "utc": "1978-12-04T17:45:40Z", "ms": 281641539924.3479 }, "end": { "local": "1978-12-05T18:52:27+03:30", "utc": "1978-12-05T15:22:27Z", "ms": 281719346950.2179 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-12-04", "window": { "start": { "local": "1978-12-04T11:30:18+03:30", "utc": "1978-12-04T08:00:18Z", "ms": 281606417862.9634 }, "end": { "local": "1978-12-04T12:18:18+03:30", "utc": "1978-12-04T08:48:18Z", "ms": 281609297862.9634 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-12-05", "window": { "start": { "local": "1978-12-05T11:30:43+03:30", "utc": "1978-12-05T08:00:43Z", "ms": 281692842587.8548 }, "end": { "local": "1978-12-05T12:18:43+03:30", "utc": "1978-12-05T08:48:43Z", "ms": 281695722587.8548 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 21:16 on Mon 4 Dec to 18:52 on Tue 5 Dec.", "fact": "1978-12-04T17:45:40Z → 1978-12-05T15:22:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:30–12:18 on the 4th, 11:31–12:19 on the 5th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 4th and 48 of 48 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 23624 s" }, { "step": "ruling", "text": "Campā Ṣaṣṭhī, Tehran, 1978: Tuesday 5 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "champa-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Campa sasthi (Maharashtra) (paraviddha). (Special when combined with naksatra Satabhisaj, yoga Vyatipata and Sunday), Skanda sasthi (purvaviddha), Guha sasthi" } ], "not_evaluated": "The row calls the day special with Śatabhiṣaj nakṣatra, Vyatīpāta yoga and a Sunday; none is tested.", "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-05", "confidence": "determinate" } ], "quote": "In Tehran, Campā Ṣaṣṭhī 1978 falls on Tuesday 5 December. Ṣaṣṭhī runs from 21:16 on Mon 4 Dec to 18:52 on Tue 5 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/champa-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/skanda-shashthi", "festival": "skanda-shashthi", "name": "Skanda Ṣaṣṭhī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23624, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1978-12-04T21:15:40+03:30", "utc": "1978-12-04T17:45:40Z", "ms": 281641539924.3479 }, "end": { "local": "1978-12-05T18:52:27+03:30", "utc": "1978-12-05T15:22:27Z", "ms": 281719346950.2179 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-04T21:15:40+03:30", "utc": "1978-12-04T17:45:40Z", "ms": 281641539924.3479 }, "end": { "local": "1978-12-05T18:52:27+03:30", "utc": "1978-12-05T15:22:27Z", "ms": 281719346950.2179 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-12-04", "window": { "start": { "local": "1978-12-04T11:30:18+03:30", "utc": "1978-12-04T08:00:18Z", "ms": 281606417862.9634 }, "end": { "local": "1978-12-04T12:18:18+03:30", "utc": "1978-12-04T08:48:18Z", "ms": 281609297862.9634 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-12-05", "window": { "start": { "local": "1978-12-05T11:30:43+03:30", "utc": "1978-12-05T08:00:43Z", "ms": 281692842587.8548 }, "end": { "local": "1978-12-05T12:18:43+03:30", "utc": "1978-12-05T08:48:43Z", "ms": 281695722587.8548 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 21:16 on Mon 4 Dec to 18:52 on Tue 5 Dec.", "fact": "1978-12-04T17:45:40Z → 1978-12-05T15:22:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:30–12:18 on the 4th, 11:31–12:19 on the 5th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 4th and 48 of 48 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 23624 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī, Tehran, 1978: Tuesday 5 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "skanda-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Campa sasthi (Maharashtra) (paraviddha). (Special when combined with naksatra Satabhisaj, yoga Vyatipata and Sunday), Skanda sasthi (purvaviddha), Guha sasthi" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-05", "confidence": "determinate" } ], "quote": "In Tehran, Skanda Ṣaṣṭhī 1978 falls on Tuesday 5 December. Ṣaṣṭhī runs from 21:16 on Mon 4 Dec to 18:52 on Tue 5 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/skanda-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/mitra-saptami", "festival": "mitra-saptami", "name": "Mitra Saptamī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16463, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1978-12-05T18:52:27+03:30", "utc": "1978-12-05T15:22:27Z", "ms": 281719346950.2179 }, "end": { "local": "1978-12-06T16:53:30+03:30", "utc": "1978-12-06T13:23:30Z", "ms": 281798610412.03937 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-05T18:52:27+03:30", "utc": "1978-12-05T15:22:27Z", "ms": 281719346950.2179 }, "end": { "local": "1978-12-06T16:53:30+03:30", "utc": "1978-12-06T13:23:30Z", "ms": 281798610412.03937 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-12-05", "window": { "start": { "local": "1978-12-05T11:30:43+03:30", "utc": "1978-12-05T08:00:43Z", "ms": 281692842587.8548 }, "end": { "local": "1978-12-05T12:18:43+03:30", "utc": "1978-12-05T08:48:43Z", "ms": 281695722587.8548 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-12-06", "window": { "start": { "local": "1978-12-06T11:31:08+03:30", "utc": "1978-12-06T08:01:08Z", "ms": 281779267853.12714 }, "end": { "local": "1978-12-06T12:19:08+03:30", "utc": "1978-12-06T08:49:08Z", "ms": 281782147853.12714 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 18:52 on Tue 5 Dec to 16:54 on Wed 6 Dec.", "fact": "1978-12-05T15:22:27Z → 1978-12-06T13:23:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:31–12:19 on the 5th, 11:31–12:19 on the 6th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 5th and 48 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 16463 s" }, { "step": "ruling", "text": "Mitra Saptamī, Tehran, 1978: Wednesday 6 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "mitra-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Mitra saptami (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-06", "confidence": "determinate" } ], "quote": "In Tehran, Mitra Saptamī 1978 falls on Wednesday 6 December. Saptamī runs from 18:52 on Tue 5 Dec to 16:54 on Wed 6 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/mitra-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-12-10", "festival": "ekadashi", "name": "Mokṣadā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22523, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-12-09T13:34:36+03:30", "utc": "1978-12-09T10:04:36Z", "ms": 282045876067.8037 }, "end": { "local": "1978-12-10T13:18:27+03:30", "utc": "1978-12-10T09:48:27Z", "ms": 282131306864.3516 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-09T13:34:36+03:30", "utc": "1978-12-09T10:04:36Z", "ms": 282045876067.8037 }, "end": { "local": "1978-12-10T13:18:27+03:30", "utc": "1978-12-10T09:48:27Z", "ms": 282131306864.3516 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-12-09", "window": { "start": { "local": "1978-12-09T07:02:17+03:30", "utc": "1978-12-09T03:32:17Z", "ms": 282022337015.2872 }, "end": { "local": "1978-12-09T07:02:17+03:30", "utc": "1978-12-09T03:32:17Z", "ms": 282022337015.2872 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-12-10", "window": { "start": { "local": "1978-12-10T07:03:04+03:30", "utc": "1978-12-10T03:33:04Z", "ms": 282108784154.18823 }, "end": { "local": "1978-12-10T07:03:04+03:30", "utc": "1978-12-10T03:33:04Z", "ms": 282108784154.18823 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:35 on Sat 9 Dec to 13:18 on Sun 10 Dec.", "fact": "1978-12-09T10:04:36Z → 1978-12-10T09:48:27Z" }, { "step": "kaala", "text": "Sunrise is at 07:02 on the 9th and 07:03 on the 10th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 9th and is on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 22523 s" }, { "step": "ruling", "text": "Mokṣadā Ekādaśī, Tehran, 1978: Sunday 10 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-10", "confidence": "determinate" } ], "quote": "In Tehran, Mokṣadā Ekādaśī 1978 falls on Sunday 10 December. Ekādaśī runs from 13:35 on Sat 9 Dec to 13:18 on Sun 10 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-12-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/akhanda-dvadashi", "festival": "akhanda-dvadashi", "name": "Akhaṇḍa Dvādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3453, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1978-12-10T13:18:27+03:30", "utc": "1978-12-10T09:48:27Z", "ms": 282131306864.3516 }, "end": { "local": "1978-12-11T13:25:10+03:30", "utc": "1978-12-11T09:55:10Z", "ms": 282218109971.6272 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-10T13:18:27+03:30", "utc": "1978-12-10T09:48:27Z", "ms": 282131306864.3516 }, "end": { "local": "1978-12-11T13:25:10+03:30", "utc": "1978-12-11T09:55:10Z", "ms": 282218109971.6272 } }, "kaala": "madhyahna", "days": [ { "local_date": "1978-12-10", "window": { "start": { "local": "1978-12-10T11:32:54+03:30", "utc": "1978-12-10T08:02:54Z", "ms": 282124973787.77856 }, "end": { "local": "1978-12-10T12:20:54+03:30", "utc": "1978-12-10T08:50:54Z", "ms": 282127853787.77856 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-12-11", "window": { "start": { "local": "1978-12-11T11:33:21+03:30", "utc": "1978-12-11T08:03:21Z", "ms": 282211401358.8091 }, "end": { "local": "1978-12-11T12:21:21+03:30", "utc": "1978-12-11T08:51:21Z", "ms": 282214281358.8091 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 13:18 on Sun 10 Dec to 13:25 on Mon 11 Dec.", "fact": "1978-12-10T09:48:27Z → 1978-12-11T09:55:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:33–12:21 on the 10th, 11:33–12:21 on the 11th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 10th and 48 of 48 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 3453 s" }, { "step": "ruling", "text": "Akhaṇḍa Dvādaśī, Tehran, 1978: Monday 11 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "akhanda-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Matsya dvadasi, Akhanda dvadasi (paraviddha), Vyanjana dvadasi & Dana dvadasi (Orissa)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-11", "confidence": "determinate" } ], "quote": "In Tehran, Akhaṇḍa Dvādaśī 1978 falls on Monday 11 December. Dvādaśī runs from 13:18 on Sun 10 Dec to 13:25 on Mon 11 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/tehran/festivals/1978/akhanda-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-12-11", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10614, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-12-11T13:25:10+03:30", "utc": "1978-12-11T09:55:10Z", "ms": 282218109971.6272 }, "end": { "local": "1978-12-12T13:54:10+03:30", "utc": "1978-12-12T10:24:10Z", "ms": 282306250038.58234 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-11T13:25:10+03:30", "utc": "1978-12-11T09:55:10Z", "ms": 282218109971.6272 }, "end": { "local": "1978-12-12T13:54:10+03:30", "utc": "1978-12-12T10:24:10Z", "ms": 282306250038.58234 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-12-11", "window": { "start": { "local": "1978-12-11T16:50:53+03:30", "utc": "1978-12-11T13:20:53Z", "ms": 282230452560.42615 }, "end": { "local": "1978-12-11T18:44:42+03:30", "utc": "1978-12-11T15:14:42Z", "ms": 282237282216.4218 } }, "covered_min": 114, "window_min": 114, "qualifies": true }, { "local_date": "1978-12-12", "window": { "start": { "local": "1978-12-12T16:51:04+03:30", "utc": "1978-12-12T13:21:04Z", "ms": 282316863643.49426 }, "end": { "local": "1978-12-12T18:44:58+03:30", "utc": "1978-12-12T15:14:58Z", "ms": 282323697635.13104 } }, "covered_min": 0, "window_min": 114, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:25 on Mon 11 Dec to 13:54 on Tue 12 Dec.", "fact": "1978-12-11T09:55:10Z → 1978-12-12T10:24:10Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 16:51–18:45 on the 11th, 16:51–18:45 on the 12th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 114 of 114 minutes on the 11th and 0 of 114 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 10614 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Tehran, 1978: Monday 11 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-11", "confidence": "determinate" } ], "quote": "In Tehran, Śukla Pradoṣa Vrata 1978 falls on Monday 11 December. Trayodaśī runs from 13:25 on Mon 11 Dec to 13:54 on Tue 12 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-12-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/dattatreyotpatti", "festival": "dattatreyotpatti", "name": "Dattātreyotpatti", "everyday": "Datta Jayanti", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3053, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1978-12-13T14:45:43+03:30", "utc": "1978-12-13T11:15:43Z", "ms": 282395742977.13165 }, "end": { "local": "1978-12-14T16:00:39+03:30", "utc": "1978-12-14T12:30:39Z", "ms": 282486638755.6932 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-13T14:45:43+03:30", "utc": "1978-12-13T11:15:43Z", "ms": 282395742977.13165 }, "end": { "local": "1978-12-14T16:00:39+03:30", "utc": "1978-12-14T12:30:39Z", "ms": 282486638755.6932 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-12-13", "window": { "start": { "local": "1978-12-13T16:51:17+03:30", "utc": "1978-12-13T13:21:17Z", "ms": 282403276659.7323 }, "end": { "local": "1978-12-13T18:45:15+03:30", "utc": "1978-12-13T15:15:15Z", "ms": 282410114560.57465 } }, "covered_min": 114, "window_min": 114, "qualifies": true }, { "local_date": "1978-12-14", "window": { "start": { "local": "1978-12-14T16:51:32+03:30", "utc": "1978-12-14T13:21:32Z", "ms": 282489691596.36847 }, "end": { "local": "1978-12-14T18:45:33+03:30", "utc": "1978-12-14T15:15:33Z", "ms": 282496532976.1365 } }, "covered_min": 0, "window_min": 114, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:46 on Wed 13 Dec to 16:01 on Thu 14 Dec.", "fact": "1978-12-13T11:15:43Z → 1978-12-14T12:30:39Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 16:51–18:45 on the 13th, 16:52–18:46 on the 14th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 114 of 114 minutes on the 13th and 0 of 114 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 3053 s" }, { "step": "ruling", "text": "Dattātreyotpatti, Tehran, 1978: Wednesday 13 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "dattatreyotpatti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Dattatreyotpatti (pradosa)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-13", "confidence": "determinate" } ], "quote": "In Tehran, Dattātreyotpatti (Datta Jayanti) 1978 falls on Wednesday 13 December. Pūrṇimā runs from 14:46 on Wed 13 Dec to 16:01 on Thu 14 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/dattatreyotpatti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/sankashta-chaturthi?on=1978-12-18", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8716, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1978-12-17T22:05:51+03:30", "utc": "1978-12-17T18:35:51Z", "ms": 282767751044.7938 }, "end": { "local": "1978-12-19T00:44:17+03:30", "utc": "1978-12-18T21:14:17Z", "ms": 282863657110.2792 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-17T22:05:51+03:30", "utc": "1978-12-17T18:35:51Z", "ms": 282767751044.7938 }, "end": { "local": "1978-12-19T00:44:17+03:30", "utc": "1978-12-18T21:14:17Z", "ms": 282863657110.2792 } }, "kaala": "moonrise", "days": [ { "local_date": "1978-12-17", "window": { "start": { "local": "1978-12-17T19:40:35+03:30", "utc": "1978-12-17T16:10:35Z", "ms": 282759035152.1824 }, "end": { "local": "1978-12-17T19:40:35+03:30", "utc": "1978-12-17T16:10:35Z", "ms": 282759035152.1824 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-12-18", "window": { "start": { "local": "1978-12-18T20:33:33+03:30", "utc": "1978-12-18T17:03:33Z", "ms": 282848613279.1977 }, "end": { "local": "1978-12-18T20:33:33+03:30", "utc": "1978-12-18T17:03:33Z", "ms": 282848613279.1977 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:06 on Sun 17 Dec to 00:44 on Tue 19 Dec.", "fact": "1978-12-17T18:35:51Z → 1978-12-18T21:14:17Z" }, { "step": "kaala", "text": "Moonrise is at 19:41 on the 17th and 20:34 on the 18th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 17th and is on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8716 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Tehran, 1978: Monday 18 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-18", "confidence": "determinate" } ], "quote": "In Tehran, Saṅkaṣṭa Caturthī 1978 falls on Monday 18 December. Caturthī runs from 22:06 on Sun 17 Dec to 00:44 on Tue 19 Dec and is current at moonrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/sankashta-chaturthi?on=1978-12-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/ekadashi?on=1978-12-26", "festival": "ekadashi", "name": "Saphalā Ekādaśī", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9336, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1978-12-25T10:43:58+03:30", "utc": "1978-12-25T07:13:58Z", "ms": 283418038299.70087 }, "end": { "local": "1978-12-26T09:48:12+03:30", "utc": "1978-12-26T06:18:12Z", "ms": 283501091673.3971 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-25T10:43:58+03:30", "utc": "1978-12-25T07:13:58Z", "ms": 283418038299.70087 }, "end": { "local": "1978-12-26T09:48:12+03:30", "utc": "1978-12-26T06:18:12Z", "ms": 283501091673.3971 } }, "kaala": "sunrise", "days": [ { "local_date": "1978-12-25", "window": { "start": { "local": "1978-12-25T07:12:12+03:30", "utc": "1978-12-25T03:42:12Z", "ms": 283405331732.68713 }, "end": { "local": "1978-12-25T07:12:12+03:30", "utc": "1978-12-25T03:42:12Z", "ms": 283405331732.68713 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1978-12-26", "window": { "start": { "local": "1978-12-26T07:12:36+03:30", "utc": "1978-12-26T03:42:36Z", "ms": 283491755864.62286 }, "end": { "local": "1978-12-26T07:12:36+03:30", "utc": "1978-12-26T03:42:36Z", "ms": 283491755864.62286 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:44 on Mon 25 Dec to 09:48 on Tue 26 Dec.", "fact": "1978-12-25T07:13:58Z → 1978-12-26T06:18:12Z" }, { "step": "kaala", "text": "Sunrise is at 07:12 on the 25th and 07:13 on the 26th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 25th and is on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 9336 s" }, { "step": "ruling", "text": "Saphalā Ekādaśī, Tehran, 1978: Tuesday 26 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-26", "confidence": "determinate" } ], "quote": "In Tehran, Saphalā Ekādaśī 1978 falls on Tuesday 26 December. Ekādaśī runs from 10:44 on Mon 25 Dec to 09:48 on Tue 26 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/tehran/festivals/1978/ekadashi?on=1978-12-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/pradosha-vrata?on=1978-12-27", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32117, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1978-12-27T08:02:14+03:30", "utc": "1978-12-27T04:32:14Z", "ms": 283581134138.6193 }, "end": { "local": "1978-12-28T05:33:17+03:30", "utc": "1978-12-28T02:03:17Z", "ms": 283658596654.9588 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-27T08:02:14+03:30", "utc": "1978-12-27T04:32:14Z", "ms": 283581134138.6193 }, "end": { "local": "1978-12-28T05:33:17+03:30", "utc": "1978-12-28T02:03:17Z", "ms": 283658596654.9588 } }, "kaala": "pradosha", "days": [ { "local_date": "1978-12-27", "window": { "start": { "local": "1978-12-27T16:57:31+03:30", "utc": "1978-12-27T13:27:31Z", "ms": 283613250926.5201 }, "end": { "local": "1978-12-27T18:51:37+03:30", "utc": "1978-12-27T15:21:37Z", "ms": 283620097320.1944 } }, "covered_min": 114, "window_min": 114, "qualifies": true }, { "local_date": "1978-12-28", "window": { "start": { "local": "1978-12-28T16:58:10+03:30", "utc": "1978-12-28T13:28:10Z", "ms": 283699690216.31866 }, "end": { "local": "1978-12-28T18:52:14+03:30", "utc": "1978-12-28T15:22:14Z", "ms": 283706533881.1691 } }, "covered_min": 0, "window_min": 114, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 08:02 on Wed 27 Dec to 05:33 on Thu 28 Dec.", "fact": "1978-12-27T04:32:14Z → 1978-12-28T02:03:17Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 16:58–18:52 on the 27th, 16:58–18:52 on the 28th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 114 of 114 minutes on the 27th and 0 of 114 on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 32117 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Tehran, 1978: Wednesday 27 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-27", "confidence": "determinate" } ], "quote": "In Tehran, Kṛṣṇa Pradoṣa Vrata 1978 falls on Wednesday 27 December. Trayodaśī runs from 08:02 on Wed 27 Dec to 05:33 on Thu 28 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/tehran/festivals/1978/pradosha-vrata?on=1978-12-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/tehran/festivals/1978/shivaratri?on=1978-12-28", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "112931", "year": 1978, "local_date": "1978-12-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7258, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1978-12-28T05:33:17+03:30", "utc": "1978-12-28T02:03:17Z", "ms": 283658596654.9588 }, "end": { "local": "1978-12-29T02:30:52+03:30", "utc": "1978-12-28T23:00:52Z", "ms": 283734052392.6374 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1978-12-28T05:33:17+03:30", "utc": "1978-12-28T02:03:17Z", "ms": 283658596654.9588 }, "end": { "local": "1978-12-29T02:30:52+03:30", "utc": "1978-12-28T23:00:52Z", "ms": 283734052392.6374 } }, "kaala": "nishita", "days": [ { "local_date": "1978-12-27", "window": { "start": { "local": "1978-12-27T23:41:25+03:30", "utc": "1978-12-27T20:11:25Z", "ms": 283637484902.7988 }, "end": { "local": "1978-12-28T00:29:25+03:30", "utc": "1978-12-27T20:59:25Z", "ms": 283640364902.7988 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1978-12-28", "window": { "start": { "local": "1978-12-28T23:41:54+03:30", "utc": "1978-12-28T20:11:54Z", "ms": 283723913959.5079 }, "end": { "local": "1978-12-29T00:29:54+03:30", "utc": "1978-12-28T20:59:54Z", "ms": 283726793959.5079 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 05:33 on Thu 28 Dec to 02:31 on Fri 29 Dec.", "fact": "1978-12-28T02:03:17Z → 1978-12-28T23:00:52Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:41–00:29 on the 27th, 23:42–00:30 on the 28th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 27th and 48 of 48 on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 7258 s" }, { "step": "ruling", "text": "Śivarātri, Tehran, 1978: Thursday 28 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1978-12-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1978-12-28", "confidence": "determinate" } ], "quote": "In Tehran, Śivarātri 1978 falls on Thursday 28 December. Caturdaśī runs from 05:33 on Thu 28 Dec to 02:31 on Fri 29 Dec and covers all of niśītha that night.", "cite": "https://ahargana.org/tehran/festivals/1978/shivaratri?on=1978-12-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } } ], "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }