{ "id": "/lu-an/festivals/1983", "place": { "id": "1802206", "slug": "lu-an", "name": "Lu’an", "region": "Anhui, China", "country": "CN", "lat": 31.73561, "lon": 116.51688, "elevation_m": 81, "tz": "Asia/Shanghai" }, "year": 1983, "tradition": "smarta", "method": "pac-rp@2026.1", "ruleset": "2026.3-draft", "rulings": [ { "id": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-01-02", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32657, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-01-02T08:44:01+08:00", "utc": "1983-01-02T00:44:01Z", "ms": 410316241047.50714 }, "end": { "local": "1983-01-03T05:42:31+08:00", "utc": "1983-01-02T21:42:31Z", "ms": 410391751418.09827 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-01-02T08:44:01+08:00", "utc": "1983-01-02T00:44:01Z", "ms": 410316241047.50714 }, "end": { "local": "1983-01-03T05:42:31+08:00", "utc": "1983-01-02T21:42:31Z", "ms": 410391751418.09827 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-01-01", "window": { "start": { "local": "1983-01-01T19:27:35+08:00", "utc": "1983-01-01T11:27:35Z", "ms": 410268455230.61536 }, "end": { "local": "1983-01-01T19:27:35+08:00", "utc": "1983-01-01T11:27:35Z", "ms": 410268455230.61536 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-01-02", "window": { "start": { "local": "1983-01-02T20:38:15+08:00", "utc": "1983-01-02T12:38:15Z", "ms": 410359094643.1811 }, "end": { "local": "1983-01-02T20:38:15+08:00", "utc": "1983-01-02T12:38:15Z", "ms": 410359094643.1811 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 08:44 on Sun 2 Jan to 05:43 on Mon 3 Jan.", "fact": "1983-01-02T00:44:01Z → 1983-01-02T21:42:31Z" }, { "step": "kaala", "text": "Moonrise is at 19:28 on the 1st and 20:38 on the 2nd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 1st and is on the 2nd.", "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 32657 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Sunday 2 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": "1983-01-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-02", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Sunday 2 January. Caturthī runs from 08:44 on Sun 2 Jan to 05:43 on Mon 3 Jan and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-01-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-01-09", "festival": "ekadashi", "name": "Saphalā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14888, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-01-09T01:25:46+08:00", "utc": "1983-01-08T17:25:46Z", "ms": 410894745586.6664 }, "end": { "local": "1983-01-10T03:06:59+08:00", "utc": "1983-01-09T19:06:59Z", "ms": 410987219442.37744 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-01-09T01:25:46+08:00", "utc": "1983-01-08T17:25:46Z", "ms": 410894745586.6664 }, "end": { "local": "1983-01-10T03:06:59+08:00", "utc": "1983-01-09T19:06:59Z", "ms": 410987219442.37744 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-01-09", "window": { "start": { "local": "1983-01-09T07:15:07+08:00", "utc": "1983-01-08T23:15:07Z", "ms": 410915706804.8665 }, "end": { "local": "1983-01-09T07:15:07+08:00", "utc": "1983-01-08T23:15:07Z", "ms": 410915706804.8665 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-01-10", "window": { "start": { "local": "1983-01-10T07:15:07+08:00", "utc": "1983-01-09T23:15:07Z", "ms": 411002107248.99097 }, "end": { "local": "1983-01-10T07:15:07+08:00", "utc": "1983-01-09T23:15:07Z", "ms": 411002107248.99097 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 01:26 on Sun 9 Jan to 03:07 on Mon 10 Jan.", "fact": "1983-01-08T17:25:46Z → 1983-01-09T19:06:59Z" }, { "step": "kaala", "text": "Sunrise is at 07:15 on the 9th and 07:15 on the 10th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 9th and is not 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 14888 s" }, { "step": "ruling", "text": "Saphalā Ekādaśī, Lu’an, 1983: Sunday 9 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": "1983-01-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-09", "confidence": "determinate" } ], "quote": "In Lu’an, Saphalā Ekādaśī 1983 falls on Sunday 9 January. Ekādaśī runs from 01:26 on Sun 9 Jan to 03:07 on Mon 10 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-01-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-01-11", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35100, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-01-11T05:15:51+08:00", "utc": "1983-01-10T21:15:51Z", "ms": 411081351437.88104 }, "end": { "local": "1983-01-12T07:44:07+08:00", "utc": "1983-01-11T23:44:07Z", "ms": 411176647484.76337 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-01-11T05:15:51+08:00", "utc": "1983-01-10T21:15:51Z", "ms": 411081351437.88104 }, "end": { "local": "1983-01-12T07:44:07+08:00", "utc": "1983-01-11T23:44:07Z", "ms": 411176647484.76337 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-01-11", "window": { "start": { "local": "1983-01-11T17:28:17+08:00", "utc": "1983-01-11T09:28:17Z", "ms": 411125296548.87775 }, "end": { "local": "1983-01-11T19:18:31+08:00", "utc": "1983-01-11T11:18:31Z", "ms": 411131910730.3283 } }, "covered_min": 110, "window_min": 110, "qualifies": true }, { "local_date": "1983-01-12", "window": { "start": { "local": "1983-01-12T17:29:08+08:00", "utc": "1983-01-12T09:29:08Z", "ms": 411211747841.1619 }, "end": { "local": "1983-01-12T19:19:15+08:00", "utc": "1983-01-12T11:19:15Z", "ms": 411218354544.5904 } }, "covered_min": 0, "window_min": 110, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 05:16 on Tue 11 Jan to 07:44 on Wed 12 Jan.", "fact": "1983-01-10T21:15:51Z → 1983-01-11T23:44:07Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:28–19:19 on the 11th, 17:29–19:19 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 110 of 110 minutes on the 11th and 0 of 110 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 35100 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Tuesday 11 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": "1983-01-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-11", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Tuesday 11 January. Trayodaśī runs from 05:16 on Tue 11 Jan to 07:44 on Wed 12 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-01-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-01-12", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25108, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-01-12T07:44:07+08:00", "utc": "1983-01-11T23:44:07Z", "ms": 411176647484.76337 }, "end": { "local": "1983-01-13T10:23:50+08:00", "utc": "1983-01-13T02:23:50Z", "ms": 411272630252.8609 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-01-12T07:44:07+08:00", "utc": "1983-01-11T23:44:07Z", "ms": 411176647484.76337 }, "end": { "local": "1983-01-13T10:23:50+08:00", "utc": "1983-01-13T02:23:50Z", "ms": 411272630252.8609 } }, "kaala": "nishita", "days": [ { "local_date": "1983-01-11", "window": { "start": { "local": "1983-01-11T23:57:40+08:00", "utc": "1983-01-11T15:57:40Z", "ms": 411148659729.3174 }, "end": { "local": "1983-01-12T00:45:40+08:00", "utc": "1983-01-11T16:45:40Z", "ms": 411151539729.3174 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-01-12", "window": { "start": { "local": "1983-01-12T23:58:03+08:00", "utc": "1983-01-12T15:58:03Z", "ms": 411235082979.0187 }, "end": { "local": "1983-01-13T00:46:03+08:00", "utc": "1983-01-12T16:46:03Z", "ms": 411237962979.0187 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 07:44 on Wed 12 Jan to 10:24 on Thu 13 Jan.", "fact": "1983-01-11T23:44:07Z → 1983-01-13T02:23:50Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:58–00:46 on the 11th, 23:58–00:46 on the 12th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25108 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Wednesday 12 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": "1983-01-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-12", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Wednesday 12 January. Caturdaśī runs from 07:44 on Wed 12 Jan to 10:24 on Thu 13 Jan and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-01-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/bhogi", "festival": "bhogi", "name": "Bhogi", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2410, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-02-13T05:50:34+08:00", "utc": "1983-02-12T21:50:34Z", "ms": 413934633752.1754 } }, "span": { "of": "transit", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 } }, "kaala": "sunset-day", "days": [ { "local_date": "1983-01-14", "window": { "start": { "local": "1983-01-13T17:30:00+08:00", "utc": "1983-01-13T09:30:00Z", "ms": 411298199691.2004 }, "end": { "local": "1983-01-14T17:30:52+08:00", "utc": "1983-01-14T09:30:52Z", "ms": 411384652051.21985 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1983-01-15", "window": { "start": { "local": "1983-01-14T17:30:52+08:00", "utc": "1983-01-14T09:30:52Z", "ms": 411384652051.21985 }, "end": { "local": "1983-01-15T17:31:45+08:00", "utc": "1983-01-15T09:31:45Z", "ms": 411471104873.9738 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1983-01-14", "days": -1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 16:51 on Fri 14 Jan.", "fact": "1983-01-14T08:50:42Z · 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 17:31, and the day of the 15th ends at 17:32.", "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 2410 s" }, { "step": "counted", "text": "Bhogi is kept the day before Pongal: Friday 14 January is the day taken above.", "fact": "follows: pongal − 1 d" }, { "step": "ruling", "text": "Bhogi, Lu’an, 1983: Thursday 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": "1983-01-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-13", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1983-01-13", "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": "1983-01-13", "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 Lu’an, Bhogi 1983 falls on Thursday 13 January. It is kept the day before Pongal, which falls on Friday 14 January. The Sun enters Makara at 16:51 on Fri 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/pongal", "festival": "pongal", "name": "Pongal", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2410, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-02-13T05:50:34+08:00", "utc": "1983-02-12T21:50:34Z", "ms": 413934633752.1754 } }, "span": { "of": "transit", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 } }, "kaala": "sunset-day", "days": [ { "local_date": "1983-01-14", "window": { "start": { "local": "1983-01-13T17:30:00+08:00", "utc": "1983-01-13T09:30:00Z", "ms": 411298199691.2004 }, "end": { "local": "1983-01-14T17:30:52+08:00", "utc": "1983-01-14T09:30:52Z", "ms": 411384652051.21985 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1983-01-15", "window": { "start": { "local": "1983-01-14T17:30:52+08:00", "utc": "1983-01-14T09:30:52Z", "ms": 411384652051.21985 }, "end": { "local": "1983-01-15T17:31:45+08:00", "utc": "1983-01-15T09:31:45Z", "ms": 411471104873.9738 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 16:51 on Fri 14 Jan.", "fact": "1983-01-14T08:50:42Z · 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 17:31, and the day of the 15th ends at 17:32.", "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 2410 s" }, { "step": "ruling", "text": "Pongal, Lu’an, 1983: Friday 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": "1983-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1983-01-14", "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": "1983-01-14", "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 Lu’an, Pongal 1983 falls on Friday 14 January. The Sun enters Makara at 16:51 on Fri 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/makara-sankranti", "festival": "makara-sankranti", "name": "Makara Saṅkrānti", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25758, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-02-13T05:50:34+08:00", "utc": "1983-02-12T21:50:34Z", "ms": 413934633752.1754 } }, "span": { "of": "transit", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 } }, "kaala": "civil-day", "days": [ { "local_date": "1983-01-14", "window": { "start": { "local": "1983-01-14T00:00:00+08:00", "utc": "1983-01-13T16:00:00Z", "ms": 411321600000 }, "end": { "local": "1983-01-15T00:00:00+08:00", "utc": "1983-01-14T16:00:00Z", "ms": 411408000000 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "1983-01-15", "window": { "start": { "local": "1983-01-15T00:00:00+08:00", "utc": "1983-01-14T16:00:00Z", "ms": 411408000000 }, "end": { "local": "1983-01-16T00:00:00+08:00", "utc": "1983-01-15T16:00:00Z", "ms": 411494400000 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 16:51 on Fri 14 Jan.", "fact": "1983-01-14T08:50:42Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from midnight to midnight, on the clock of Lu’an.", "fact": "civil-day: midnight-to-midnight · Asia/Shanghai" }, { "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 15th.", "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 25758 s" }, { "step": "ruling", "text": "Makara Saṅkrānti, Lu’an, 1983: Friday 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": "1983-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1983-01-14", "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." } }, { "kind": "reckoning", "id": "sunset-rule", "local_date": "1983-01-14", "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 Lu’an, Makara Saṅkrānti 1983 falls on Friday 14 January. The Sun enters Makara at 16:51 on Fri 14 Jan, and the rule counts the day from midnight.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/mattu-pongal", "festival": "mattu-pongal", "name": "Mattu Pongal", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2410, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-02-13T05:50:34+08:00", "utc": "1983-02-12T21:50:34Z", "ms": 413934633752.1754 } }, "span": { "of": "transit", "start": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 }, "end": { "local": "1983-01-14T16:50:42+08:00", "utc": "1983-01-14T08:50:42Z", "ms": 411382241553.98114 } }, "kaala": "sunset-day", "days": [ { "local_date": "1983-01-14", "window": { "start": { "local": "1983-01-13T17:30:00+08:00", "utc": "1983-01-13T09:30:00Z", "ms": 411298199691.2004 }, "end": { "local": "1983-01-14T17:30:52+08:00", "utc": "1983-01-14T09:30:52Z", "ms": 411384652051.21985 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1983-01-15", "window": { "start": { "local": "1983-01-14T17:30:52+08:00", "utc": "1983-01-14T09:30:52Z", "ms": 411384652051.21985 }, "end": { "local": "1983-01-15T17:31:45+08:00", "utc": "1983-01-15T09:31:45Z", "ms": 411471104873.9738 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1983-01-14", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 16:51 on Fri 14 Jan.", "fact": "1983-01-14T08:50:42Z · 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 17:31, and the day of the 15th ends at 17:32.", "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 2410 s" }, { "step": "counted", "text": "Mattu Pongal is kept the day after Pongal: Friday 14 January is the day taken above.", "fact": "follows: pongal + 1 d" }, { "step": "ruling", "text": "Mattu Pongal, Lu’an, 1983: Saturday 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": "1983-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-15", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1983-01-15", "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": "1983-01-15", "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 Lu’an, Mattu Pongal 1983 falls on Saturday 15 January. It is kept the day after Pongal, which falls on Friday 14 January. The Sun enters Makara at 16:51 on Fri 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-01-18", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28468, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-01-17T20:42:24+08:00", "utc": "1983-01-17T12:42:24Z", "ms": 411655344149.88025 }, "end": { "local": "1983-01-18T22:41:40+08:00", "utc": "1983-01-18T14:41:40Z", "ms": 411748899782.4871 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-01-17T20:42:24+08:00", "utc": "1983-01-17T12:42:24Z", "ms": 411655344149.88025 }, "end": { "local": "1983-01-18T22:41:40+08:00", "utc": "1983-01-18T14:41:40Z", "ms": 411748899782.4871 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-01-17", "window": { "start": { "local": "1983-01-17T11:59:57+08:00", "utc": "1983-01-17T03:59:57Z", "ms": 411623996564.68176 }, "end": { "local": "1983-01-17T12:47:57+08:00", "utc": "1983-01-17T04:47:57Z", "ms": 411626876564.68176 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-01-18", "window": { "start": { "local": "1983-01-18T12:00:17+08:00", "utc": "1983-01-18T04:00:17Z", "ms": 411710416753.9147 }, "end": { "local": "1983-01-18T12:48:17+08:00", "utc": "1983-01-18T04:48:17Z", "ms": 411713296753.9147 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 20:42 on Mon 17 Jan to 22:42 on Tue 18 Jan.", "fact": "1983-01-17T12:42:24Z → 1983-01-18T14:41:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 17th, 12:00–12:48 on the 18th.", "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 17th and 48 of 48 on the 18th.", "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 28468 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Tuesday 18 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": "1983-01-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-18", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Tuesday 18 January. Caturthī runs from 20:42 on Mon 17 Jan to 22:42 on Tue 18 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-01-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-01-25", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31150, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-01-24T22:32:35+08:00", "utc": "1983-01-24T14:32:35Z", "ms": 412266755119.08813 }, "end": { "local": "1983-01-25T20:09:38+08:00", "utc": "1983-01-25T12:09:38Z", "ms": 412344578457.7685 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-01-24T22:32:35+08:00", "utc": "1983-01-24T14:32:35Z", "ms": 412266755119.08813 }, "end": { "local": "1983-01-25T20:09:38+08:00", "utc": "1983-01-25T12:09:38Z", "ms": 412344578457.7685 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-01-25", "window": { "start": { "local": "1983-01-25T07:11:45+08:00", "utc": "1983-01-24T23:11:45Z", "ms": 412297904661.2328 }, "end": { "local": "1983-01-25T07:11:45+08:00", "utc": "1983-01-24T23:11:45Z", "ms": 412297904661.2328 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-01-26", "window": { "start": { "local": "1983-01-26T07:11:17+08:00", "utc": "1983-01-25T23:11:17Z", "ms": 412384277464.19196 }, "end": { "local": "1983-01-26T07:11:17+08:00", "utc": "1983-01-25T23:11:17Z", "ms": 412384277464.19196 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 22:33 on Mon 24 Jan to 20:10 on Tue 25 Jan.", "fact": "1983-01-24T14:32:35Z → 1983-01-25T12:09:38Z" }, { "step": "kaala", "text": "Sunrise is at 07:12 on the 25th and 07:11 on the 26th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī 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: paraviddha → only-day · margin 31150 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Lu’an, 1983: Tuesday 25 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": "1983-01-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-25", "confidence": "determinate" } ], "quote": "In Lu’an, Putradā Ekādaśī 1983 falls on Tuesday 25 January. Ekādaśī runs from 22:33 on Mon 24 Jan to 20:10 on Tue 25 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-01-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-01-26", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1697, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-01-26T17:13:27+08:00", "utc": "1983-01-26T09:13:27Z", "ms": 412420406811.8454 }, "end": { "local": "1983-01-27T13:51:25+08:00", "utc": "1983-01-27T05:51:25Z", "ms": 412494685433.488 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-01-26T17:13:27+08:00", "utc": "1983-01-26T09:13:27Z", "ms": 412420406811.8454 }, "end": { "local": "1983-01-27T13:51:25+08:00", "utc": "1983-01-27T05:51:25Z", "ms": 412494685433.488 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-01-26", "window": { "start": { "local": "1983-01-26T17:41:44+08:00", "utc": "1983-01-26T09:41:44Z", "ms": 412422103955.83246 }, "end": { "local": "1983-01-26T19:29:37+08:00", "utc": "1983-01-26T11:29:37Z", "ms": 412428576580.03894 } }, "covered_min": 108, "window_min": 108, "qualifies": true }, { "local_date": "1983-01-27", "window": { "start": { "local": "1983-01-27T17:42:39+08:00", "utc": "1983-01-27T09:42:39Z", "ms": 412508559052.15515 }, "end": { "local": "1983-01-27T19:30:20+08:00", "utc": "1983-01-27T11:30:20Z", "ms": 412515020272.46063 } }, "covered_min": 0, "window_min": 108, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 17:13 on Wed 26 Jan to 13:51 on Thu 27 Jan.", "fact": "1983-01-26T09:13:27Z → 1983-01-27T05:51:25Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:42–19:30 on the 26th, 17:43–19:30 on the 27th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 108 of 108 minutes on the 26th and 0 of 108 on the 27th.", "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 1697 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Wednesday 26 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": "1983-01-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-26", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Wednesday 26 January. Trayodaśī runs from 17:13 on Wed 26 Jan to 13:51 on Thu 27 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-01-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-01-31", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-01-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1268, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-01-31T20:11:24+08:00", "utc": "1983-01-31T12:11:24Z", "ms": 412863084277.94354 }, "end": { "local": "1983-02-01T17:42:40+08:00", "utc": "1983-02-01T09:42:40Z", "ms": 412940560309.9897 }, "month": { "amanta": 9, "purnimanta": 11, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-01-31T20:11:24+08:00", "utc": "1983-01-31T12:11:24Z", "ms": 412863084277.94354 }, "end": { "local": "1983-02-01T17:42:40+08:00", "utc": "1983-02-01T09:42:40Z", "ms": 412940560309.9897 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-01-31", "window": { "start": { "local": "1983-01-31T20:32:32+08:00", "utc": "1983-01-31T12:32:32Z", "ms": 412864351855.7957 }, "end": { "local": "1983-01-31T20:32:32+08:00", "utc": "1983-01-31T12:32:32Z", "ms": 412864351855.7957 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-02-01", "window": { "start": { "local": "1983-02-01T21:38:25+08:00", "utc": "1983-02-01T13:38:25Z", "ms": 412954704503.62213 }, "end": { "local": "1983-02-01T21:38:25+08:00", "utc": "1983-02-01T13:38:25Z", "ms": 412954704503.62213 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 20:11 on Mon 31 Jan to 17:43 on Tue 1 Feb.", "fact": "1983-01-31T12:11:24Z → 1983-02-01T09:42:40Z" }, { "step": "kaala", "text": "Moonrise is at 20:33 on the 31st and 21:38 on the 1st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 31st and is not on the 1st.", "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 1268 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Monday 31 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": "1983-01-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-01-31", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Monday 31 January. Caturthī runs from 20:11 on Mon 31 Jan to 17:43 on Tue 1 Feb and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-01-31", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-02-08", "festival": "ekadashi", "name": "Ṣaṭtilā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-02-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32249, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-02-07T19:30:53+08:00", "utc": "1983-02-07T11:30:53Z", "ms": 413465452808.42755 }, "end": { "local": "1983-02-08T22:04:48+08:00", "utc": "1983-02-08T14:04:48Z", "ms": 413561087696.81573 }, "month": { "amanta": 9, "purnimanta": 11, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-02-07T19:30:53+08:00", "utc": "1983-02-07T11:30:53Z", "ms": 413465452808.42755 }, "end": { "local": "1983-02-08T22:04:48+08:00", "utc": "1983-02-08T14:04:48Z", "ms": 413561087696.81573 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-02-08", "window": { "start": { "local": "1983-02-08T07:03:05+08:00", "utc": "1983-02-07T23:03:05Z", "ms": 413506984724.8047 }, "end": { "local": "1983-02-08T07:03:05+08:00", "utc": "1983-02-07T23:03:05Z", "ms": 413506984724.8047 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-02-09", "window": { "start": { "local": "1983-02-09T07:02:17+08:00", "utc": "1983-02-08T23:02:17Z", "ms": 413593337002.6687 }, "end": { "local": "1983-02-09T07:02:17+08:00", "utc": "1983-02-08T23:02:17Z", "ms": 413593337002.6687 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 19:31 on Mon 7 Feb to 22:05 on Tue 8 Feb.", "fact": "1983-02-07T11:30:53Z → 1983-02-08T14:04:48Z" }, { "step": "kaala", "text": "Sunrise is at 07:03 on the 8th and 07:02 on the 9th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 8th and is not on the 9th.", "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 32249 s" }, { "step": "ruling", "text": "Ṣaṭtilā Ekādaśī, Lu’an, 1983: Tuesday 8 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": "1983-02-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-02-08", "confidence": "determinate" } ], "quote": "In Lu’an, Ṣaṭtilā Ekādaśī 1983 falls on Tuesday 8 February. Ekādaśī runs from 19:31 on Mon 7 Feb to 22:05 on Tue 8 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-02-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-02-10", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-02-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18641, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-02-10T00:50:03+08:00", "utc": "1983-02-09T16:50:03Z", "ms": 413657402744.9766 }, "end": { "local": "1983-02-11T03:35:12+08:00", "utc": "1983-02-10T19:35:12Z", "ms": 413753712243.6952 }, "month": { "amanta": 9, "purnimanta": 11, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-02-10T00:50:03+08:00", "utc": "1983-02-09T16:50:03Z", "ms": 413657402744.9766 }, "end": { "local": "1983-02-11T03:35:12+08:00", "utc": "1983-02-10T19:35:12Z", "ms": 413753712243.6952 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-02-09", "window": { "start": { "local": "1983-02-09T17:54:25+08:00", "utc": "1983-02-09T09:54:25Z", "ms": 413632464898.6138 }, "end": { "local": "1983-02-09T19:39:21+08:00", "utc": "1983-02-09T11:39:21Z", "ms": 413638761312.6095 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1983-02-10", "window": { "start": { "local": "1983-02-10T17:55:18+08:00", "utc": "1983-02-10T09:55:18Z", "ms": 413718917713.29846 }, "end": { "local": "1983-02-10T19:40:00+08:00", "utc": "1983-02-10T11:40:00Z", "ms": 413725200385.2332 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 00:50 on Thu 10 Feb to 03:35 on Fri 11 Feb.", "fact": "1983-02-09T16:50:03Z → 1983-02-10T19:35:12Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:54–19:39 on the 9th, 17:55–19:40 on the 10th.", "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 9th and 105 of 105 on the 10th.", "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 18641 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Thursday 10 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": "1983-02-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-02-10", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Thursday 10 February. Trayodaśī runs from 00:50 on Thu 10 Feb to 03:35 on Fri 11 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-02-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/yama-tarpana", "festival": "yama-tarpana", "name": "Yama Tarpaṇa", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-02-11", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 2912, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-02-11T03:35:12+08:00", "utc": "1983-02-10T19:35:12Z", "ms": 413753712243.6952 }, "end": { "local": "1983-02-12T06:11:14+08:00", "utc": "1983-02-11T22:11:14Z", "ms": 413849473875.45844 }, "month": { "amanta": 9, "purnimanta": 11, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-02-11T03:35:12+08:00", "utc": "1983-02-10T19:35:12Z", "ms": 413753712243.6952 }, "end": { "local": "1983-02-12T06:11:14+08:00", "utc": "1983-02-11T22:11:14Z", "ms": 413849473875.45844 } }, "kaala": "arunodaya", "days": [ { "local_date": "1983-02-11", "window": { "start": { "local": "1983-02-11T05:15:55+08:00", "utc": "1983-02-10T21:15:55Z", "ms": 413759755080.8743 }, "end": { "local": "1983-02-11T07:00:38+08:00", "utc": "1983-02-10T23:00:38Z", "ms": 413766037752.8091 } }, "covered_min": 105, "window_min": 105, "qualifies": true }, { "local_date": "1983-02-12", "window": { "start": { "local": "1983-02-12T05:15:17+08:00", "utc": "1983-02-11T21:15:17Z", "ms": 413846117469.2852 }, "end": { "local": "1983-02-12T06:59:46+08:00", "utc": "1983-02-11T22:59:46Z", "ms": 413852386275.72095 } }, "covered_min": 56, "window_min": 104, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 03:35 on Fri 11 Feb to 06:11 on Sat 12 Feb.", "fact": "1983-02-10T19:35:12Z → 1983-02-11T22:11:14Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:16–07:01 on the 11th, 05:15–07:00 on the 12th.", "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 105 of 105 minutes on the 11th and 56 of 104 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Both dawns qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 2912 s" }, { "step": "ruling", "text": "Yama Tarpaṇa, Lu’an, 1983: Friday 11 February.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "1983-02-11", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-02-11", "confidence": "boundary" } ], "quote": "In Lu’an, Yama Tarpaṇa 1983 falls on Friday 11 February. Caturdaśī runs from 03:35 on Fri 11 Feb to 06:11 on Sat 12 Feb and covers all of aruṇodaya that dawn. It also reaches the next dawn for 56 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/shivaratri?on=1983-02-11", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-02-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9795, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-02-11T03:35:12+08:00", "utc": "1983-02-10T19:35:12Z", "ms": 413753712243.6952 }, "end": { "local": "1983-02-12T06:11:14+08:00", "utc": "1983-02-11T22:11:14Z", "ms": 413849473875.45844 }, "month": { "amanta": 9, "purnimanta": 11, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-02-11T03:35:12+08:00", "utc": "1983-02-10T19:35:12Z", "ms": 413753712243.6952 }, "end": { "local": "1983-02-12T06:11:14+08:00", "utc": "1983-02-11T22:11:14Z", "ms": 413849473875.45844 } }, "kaala": "nishita", "days": [ { "local_date": "1983-02-10", "window": { "start": { "local": "1983-02-11T00:03:58+08:00", "utc": "1983-02-10T16:03:58Z", "ms": 413741037733.0538 }, "end": { "local": "1983-02-11T00:51:58+08:00", "utc": "1983-02-10T16:51:58Z", "ms": 413743917733.0538 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-02-11", "window": { "start": { "local": "1983-02-12T00:03:58+08:00", "utc": "1983-02-11T16:03:58Z", "ms": 413827438251.58685 }, "end": { "local": "1983-02-12T00:51:58+08:00", "utc": "1983-02-11T16:51:58Z", "ms": 413830318251.58685 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 03:35 on Fri 11 Feb to 06:11 on Sat 12 Feb.", "fact": "1983-02-10T19:35:12Z → 1983-02-11T22:11:14Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:04–00:52 on the 10th, 00:04–00:52 on the 11th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9795 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Friday 11 February.", "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": "1983-02-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-02-11", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Friday 11 February. Caturdaśī runs from 03:35 on Fri 11 Feb to 06:11 on Sat 12 Feb and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-02-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-02-17", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-02-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2177, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-02-16T13:28:35+08:00", "utc": "1983-02-16T05:28:35Z", "ms": 414221315303.12946 }, "end": { "local": "1983-02-17T14:19:42+08:00", "utc": "1983-02-17T06:19:42Z", "ms": 414310782422.4143 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": true, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-02-16T13:28:35+08:00", "utc": "1983-02-16T05:28:35Z", "ms": 414221315303.12946 }, "end": { "local": "1983-02-17T14:19:42+08:00", "utc": "1983-02-17T06:19:42Z", "ms": 414310782422.4143 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-02-16", "window": { "start": { "local": "1983-02-16T12:04:18+08:00", "utc": "1983-02-16T04:04:18Z", "ms": 414216258215.0172 }, "end": { "local": "1983-02-16T12:52:18+08:00", "utc": "1983-02-16T04:52:18Z", "ms": 414219138215.0172 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-02-17", "window": { "start": { "local": "1983-02-17T12:04:15+08:00", "utc": "1983-02-17T04:04:15Z", "ms": 414302654824.2738 }, "end": { "local": "1983-02-17T12:52:15+08:00", "utc": "1983-02-17T04:52:15Z", "ms": 414305534824.2738 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 13:29 on Wed 16 Feb to 14:20 on Thu 17 Feb.", "fact": "1983-02-16T05:28:35Z → 1983-02-17T06:19:42Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:04–12:52 on the 16th, 12:04–12:52 on the 17th.", "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 16th and 48 of 48 on the 17th.", "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 2177 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Thursday 17 February.", "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": "1983-02-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-02-17", "confidence": "boundary" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Thursday 17 February. Caturthī runs from 13:29 on Wed 16 Feb to 14:20 on Thu 17 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-02-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-02-23", "festival": "ekadashi", "name": "Śukla Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-02-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2058, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-02-23T08:56:14+08:00", "utc": "1983-02-23T00:56:14Z", "ms": 414809774418.90784 }, "end": { "local": "1983-02-24T06:13:44+08:00", "utc": "1983-02-23T22:13:44Z", "ms": 414886424406.47797 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": true, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-02-23T08:56:14+08:00", "utc": "1983-02-23T00:56:14Z", "ms": 414809774418.90784 }, "end": { "local": "1983-02-24T06:13:44+08:00", "utc": "1983-02-23T22:13:44Z", "ms": 414886424406.47797 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-02-23", "window": { "start": { "local": "1983-02-23T06:49:07+08:00", "utc": "1983-02-22T22:49:07Z", "ms": 414802146596.6507 }, "end": { "local": "1983-02-23T06:49:07+08:00", "utc": "1983-02-22T22:49:07Z", "ms": 414802146596.6507 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-02-24", "window": { "start": { "local": "1983-02-24T06:48:02+08:00", "utc": "1983-02-23T22:48:02Z", "ms": 414888482496.666 }, "end": { "local": "1983-02-24T06:48:02+08:00", "utc": "1983-02-23T22:48:02Z", "ms": 414888482496.666 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 08:56 on Wed 23 Feb to 06:14 on Thu 24 Feb.", "fact": "1983-02-23T00:56:14Z → 1983-02-23T22:13:44Z" }, { "step": "kaala", "text": "Sunrise is at 06:49 on the 23rd and 06:48 on the 24th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 23rd and is not on the 24th.", "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 2058 s" }, { "step": "ruling", "text": "Śukla Ekādaśī, Lu’an, 1983: Wednesday 23 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": "1983-02-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-02-23", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Ekādaśī 1983 falls on Wednesday 23 February. Ekādaśī runs from 08:56 on Wed 23 Feb to 06:14 on Thu 24 Feb, and is current at sunrise on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-02-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-02-25", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-02-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14360, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-02-25T03:08:36+08:00", "utc": "1983-02-24T19:08:36Z", "ms": 414961716279.048 }, "end": { "local": "1983-02-25T23:48:12+08:00", "utc": "1983-02-25T15:48:12Z", "ms": 415036092013.19293 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": true, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-02-25T03:08:36+08:00", "utc": "1983-02-24T19:08:36Z", "ms": 414961716279.048 }, "end": { "local": "1983-02-25T23:48:12+08:00", "utc": "1983-02-25T15:48:12Z", "ms": 415036092013.19293 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-02-24", "window": { "start": { "local": "1983-02-24T18:07:00+08:00", "utc": "1983-02-24T10:07:00Z", "ms": 414929220487.7559 }, "end": { "local": "1983-02-24T19:48:20+08:00", "utc": "1983-02-24T11:48:20Z", "ms": 414935300094.5291 } }, "covered_min": 0, "window_min": 101, "qualifies": false }, { "local_date": "1983-02-25", "window": { "start": { "local": "1983-02-25T18:07:48+08:00", "utc": "1983-02-25T10:07:48Z", "ms": 415015667818.8318 }, "end": { "local": "1983-02-25T19:48:52+08:00", "utc": "1983-02-25T11:48:52Z", "ms": 415021732343.769 } }, "covered_min": 101, "window_min": 101, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 03:09 on Fri 25 Feb to 23:48 on Fri 25 Feb.", "fact": "1983-02-24T19:08:36Z → 1983-02-25T15:48:12Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:07–19:48 on the 24th, 18:08–19:49 on the 25th.", "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 101 minutes on the 24th and 101 of 101 on the 25th.", "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 14360 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Friday 25 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": "1983-02-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-02-25", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Friday 25 February. Trayodaśī runs from 03:09 on Fri 25 Feb to 23:48 on Fri 25 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-02-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-03-02", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36329, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-03-02T08:55:55+08:00", "utc": "1983-03-02T00:55:55Z", "ms": 415414554583.8803 }, "end": { "local": "1983-03-03T07:30:59+08:00", "utc": "1983-03-02T23:30:59Z", "ms": 415495858666.5352 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": true, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-02T08:55:55+08:00", "utc": "1983-03-02T00:55:55Z", "ms": 415414554583.8803 }, "end": { "local": "1983-03-03T07:30:59+08:00", "utc": "1983-03-02T23:30:59Z", "ms": 415495858666.5352 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-03-01", "window": { "start": { "local": "1983-03-01T20:21:50+08:00", "utc": "1983-03-01T12:21:50Z", "ms": 415369309853.4097 }, "end": { "local": "1983-03-01T20:21:50+08:00", "utc": "1983-03-01T12:21:50Z", "ms": 415369309853.4097 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-03-02", "window": { "start": { "local": "1983-03-02T21:25:30+08:00", "utc": "1983-03-02T13:25:30Z", "ms": 415459529512.547 }, "end": { "local": "1983-03-02T21:25:30+08:00", "utc": "1983-03-02T13:25:30Z", "ms": 415459529512.547 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 08:56 on Wed 2 Mar to 07:31 on Thu 3 Mar.", "fact": "1983-03-02T00:55:55Z → 1983-03-02T23:30:59Z" }, { "step": "kaala", "text": "Moonrise is at 20:22 on the 1st and 21:25 on the 2nd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 1st and is on the 2nd.", "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 36329 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Wednesday 2 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": "1983-03-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-02", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Wednesday 2 March. Caturthī runs from 08:56 on Wed 2 Mar to 07:31 on Thu 3 Mar and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-03-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-03-10", "festival": "ekadashi", "name": "Kṛṣṇa Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31716, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-03-09T15:21:39+08:00", "utc": "1983-03-09T07:21:39Z", "ms": 416042498871.4809 }, "end": { "local": "1983-03-10T18:03:58+08:00", "utc": "1983-03-10T10:03:58Z", "ms": 416138638349.8841 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": true, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-09T15:21:39+08:00", "utc": "1983-03-09T07:21:39Z", "ms": 416042498871.4809 }, "end": { "local": "1983-03-10T18:03:58+08:00", "utc": "1983-03-10T10:03:58Z", "ms": 416138638349.8841 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-03-09", "window": { "start": { "local": "1983-03-09T06:33:03+08:00", "utc": "1983-03-08T22:33:03Z", "ms": 416010783118.271 }, "end": { "local": "1983-03-09T06:33:03+08:00", "utc": "1983-03-08T22:33:03Z", "ms": 416010783118.271 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-03-10", "window": { "start": { "local": "1983-03-10T06:31:50+08:00", "utc": "1983-03-09T22:31:50Z", "ms": 416097109953.75775 }, "end": { "local": "1983-03-10T06:31:50+08:00", "utc": "1983-03-09T22:31:50Z", "ms": 416097109953.75775 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 15:22 on Wed 9 Mar to 18:04 on Thu 10 Mar.", "fact": "1983-03-09T07:21:39Z → 1983-03-10T10:03:58Z" }, { "step": "kaala", "text": "Sunrise is at 06:33 on the 9th and 06:32 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 31716 s" }, { "step": "ruling", "text": "Kṛṣṇa Ekādaśī, Lu’an, 1983: Thursday 10 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": "1983-03-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-10", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Ekādaśī 1983 falls on Thursday 10 March. Ekādaśī runs from 15:22 on Wed 9 Mar to 18:04 on Thu 10 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-03-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-03-12", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2342, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-03-11T20:34:47+08:00", "utc": "1983-03-11T12:34:47Z", "ms": 416234086693.9889 }, "end": { "local": "1983-03-12T22:44:38+08:00", "utc": "1983-03-12T14:44:38Z", "ms": 416328277680.0652 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": true, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-11T20:34:47+08:00", "utc": "1983-03-11T12:34:47Z", "ms": 416234086693.9889 }, "end": { "local": "1983-03-12T22:44:38+08:00", "utc": "1983-03-12T14:44:38Z", "ms": 416328277680.0652 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-03-11", "window": { "start": { "local": "1983-03-11T18:18:16+08:00", "utc": "1983-03-11T10:18:16Z", "ms": 416225895731.24445 }, "end": { "local": "1983-03-11T19:55:45+08:00", "utc": "1983-03-11T11:55:45Z", "ms": 416231744618.38367 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "1983-03-12", "window": { "start": { "local": "1983-03-12T18:18:58+08:00", "utc": "1983-03-12T10:18:58Z", "ms": 416312338482.1076 }, "end": { "local": "1983-03-12T19:56:12+08:00", "utc": "1983-03-12T11:56:12Z", "ms": 416318171755.9189 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:35 on Fri 11 Mar to 22:45 on Sat 12 Mar.", "fact": "1983-03-11T12:34:47Z → 1983-03-12T14:44:38Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:18–19:56 on the 11th, 18:19–19:56 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 97 minutes on the 11th and 97 of 97 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 2342 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Saturday 12 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": "1983-03-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-12", "confidence": "boundary" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Saturday 12 March. Trayodaśī runs from 20:35 on Fri 11 Mar to 22:45 on Sat 12 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-03-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-03-12", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-12", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 1149, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-03-12T22:44:38+08:00", "utc": "1983-03-12T14:44:38Z", "ms": 416328277680.0652 }, "end": { "local": "1983-03-14T00:28:08+08:00", "utc": "1983-03-13T16:28:08Z", "ms": 416420887853.2054 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": true, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-12T22:44:38+08:00", "utc": "1983-03-12T14:44:38Z", "ms": 416328277680.0652 }, "end": { "local": "1983-03-14T00:28:08+08:00", "utc": "1983-03-13T16:28:08Z", "ms": 416420887853.2054 } }, "kaala": "nishita", "days": [ { "local_date": "1983-03-12", "window": { "start": { "local": "1983-03-12T23:59:33+08:00", "utc": "1983-03-12T15:59:33Z", "ms": 416332773258.8999 }, "end": { "local": "1983-03-13T00:47:33+08:00", "utc": "1983-03-12T16:47:33Z", "ms": 416335653258.8999 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-03-13", "window": { "start": { "local": "1983-03-13T23:59:17+08:00", "utc": "1983-03-13T15:59:17Z", "ms": 416419157171.44775 }, "end": { "local": "1983-03-14T00:47:17+08:00", "utc": "1983-03-13T16:47:17Z", "ms": 416422037171.44775 } }, "covered_min": 29, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 22:45 on Sat 12 Mar to 00:28 on Mon 14 Mar.", "fact": "1983-03-12T14:44:38Z → 1983-03-13T16:28:08Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:00–00:48 on the 12th, 23:59–00:47 on the 13th.", "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 12th and 29 of 48 on the 13th.", "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 1149 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Saturday 12 March.", "fact": "confidence: boundary (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": "1983-03-12", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-12", "confidence": "boundary" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Saturday 12 March. Caturdaśī runs from 22:45 on Sat 12 Mar to 00:28 on Mon 14 Mar and covers all of niśītha that night. It also reaches the next night for 29 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-03-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-03-18", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32798, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-03-18T02:51:53+08:00", "utc": "1983-03-17T18:51:53Z", "ms": 416775113478.59094 }, "end": { "local": "1983-03-19T02:28:55+08:00", "utc": "1983-03-18T18:28:55Z", "ms": 416860134627.93414 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-18T02:51:53+08:00", "utc": "1983-03-17T18:51:53Z", "ms": 416775113478.59094 }, "end": { "local": "1983-03-19T02:28:55+08:00", "utc": "1983-03-18T18:28:55Z", "ms": 416860134627.93414 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-03-18", "window": { "start": { "local": "1983-03-18T11:58:31+08:00", "utc": "1983-03-18T03:58:31Z", "ms": 416807911002.2897 }, "end": { "local": "1983-03-18T12:46:31+08:00", "utc": "1983-03-18T04:46:31Z", "ms": 416810791002.2897 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-03-19", "window": { "start": { "local": "1983-03-19T11:58:14+08:00", "utc": "1983-03-19T03:58:14Z", "ms": 416894293633.2489 }, "end": { "local": "1983-03-19T12:46:14+08:00", "utc": "1983-03-19T04:46:14Z", "ms": 416897173633.2489 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:52 on Fri 18 Mar to 02:29 on Sat 19 Mar.", "fact": "1983-03-17T18:51:53Z → 1983-03-18T18:28:55Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 18th, 11:58–12:46 on the 19th.", "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 18th and 0 of 48 on the 19th.", "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 32798 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Friday 18 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": "1983-03-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-18", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Friday 18 March. Caturthī runs from 02:52 on Fri 18 Mar to 02:29 on Sat 19 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-03-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-03-25", "festival": "ekadashi", "name": "Āmalakī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29176, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-03-24T16:58:36+08:00", "utc": "1983-03-24T08:58:36Z", "ms": 417344316330.10614 }, "end": { "local": "1983-03-25T14:19:13+08:00", "utc": "1983-03-25T06:19:13Z", "ms": 417421153107.66 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-24T16:58:36+08:00", "utc": "1983-03-24T08:58:36Z", "ms": 417344316330.10614 }, "end": { "local": "1983-03-25T14:19:13+08:00", "utc": "1983-03-25T06:19:13Z", "ms": 417421153107.66 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-03-24", "window": { "start": { "local": "1983-03-24T06:14:14+08:00", "utc": "1983-03-23T22:14:14Z", "ms": 417305653575.0365 }, "end": { "local": "1983-03-24T06:14:14+08:00", "utc": "1983-03-23T22:14:14Z", "ms": 417305653575.0365 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-03-25", "window": { "start": { "local": "1983-03-25T06:12:57+08:00", "utc": "1983-03-24T22:12:57Z", "ms": 417391976913.8967 }, "end": { "local": "1983-03-25T06:12:57+08:00", "utc": "1983-03-24T22:12:57Z", "ms": 417391976913.8967 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:59 on Thu 24 Mar to 14:19 on Fri 25 Mar.", "fact": "1983-03-24T08:58:36Z → 1983-03-25T06:19:13Z" }, { "step": "kaala", "text": "Sunrise is at 06:14 on the 24th and 06:13 on the 25th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 24th and is on the 25th.", "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 29176 s" }, { "step": "ruling", "text": "Āmalakī Ekādaśī, Lu’an, 1983: Friday 25 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": "1983-03-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-25", "confidence": "determinate" } ], "quote": "In Lu’an, Āmalakī Ekādaśī 1983 falls on Friday 25 March. Ekādaśī runs from 16:59 on Thu 24 Mar to 14:19 on Fri 25 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-03-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-03-26", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25076, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-03-26T11:30:39+08:00", "utc": "1983-03-26T03:30:39Z", "ms": 417497439357.12585 }, "end": { "local": "1983-03-27T08:39:59+08:00", "utc": "1983-03-27T00:39:59Z", "ms": 417573599275.30396 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-26T11:30:39+08:00", "utc": "1983-03-26T03:30:39Z", "ms": 417497439357.12585 }, "end": { "local": "1983-03-27T08:39:59+08:00", "utc": "1983-03-27T00:39:59Z", "ms": 417573599275.30396 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-03-26", "window": { "start": { "local": "1983-03-26T18:28:36+08:00", "utc": "1983-03-26T10:28:36Z", "ms": 417522515847.9409 }, "end": { "local": "1983-03-26T20:02:10+08:00", "utc": "1983-03-26T12:02:10Z", "ms": 417528130215.0748 } }, "covered_min": 94, "window_min": 94, "qualifies": true }, { "local_date": "1983-03-27", "window": { "start": { "local": "1983-03-27T18:29:16+08:00", "utc": "1983-03-27T10:29:16Z", "ms": 417608955969.177 }, "end": { "local": "1983-03-27T20:02:35+08:00", "utc": "1983-03-27T12:02:35Z", "ms": 417614554774.984 } }, "covered_min": 0, "window_min": 93, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:31 on Sat 26 Mar to 08:40 on Sun 27 Mar.", "fact": "1983-03-26T03:30:39Z → 1983-03-27T00:39:59Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:29–20:02 on the 26th, 18:29–20:03 on the 27th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 94 of 94 minutes on the 26th and 0 of 93 on the 27th.", "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 25076 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Saturday 26 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": "1983-03-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-26", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Saturday 26 March. Trayodaśī runs from 11:31 on Sat 26 Mar to 08:40 on Sun 27 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-03-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/holika-dahana", "festival": "holika-dahana", "name": "Holikā Dahana", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32204, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-03-28T05:55:35+08:00", "utc": "1983-03-27T21:55:35Z", "ms": 417650134967.7902 }, "end": { "local": "1983-03-29T03:26:40+08:00", "utc": "1983-03-28T19:26:40Z", "ms": 417727599521.2212 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-28T05:55:35+08:00", "utc": "1983-03-27T21:55:35Z", "ms": 417650134967.7902 }, "end": { "local": "1983-03-29T03:26:40+08:00", "utc": "1983-03-28T19:26:40Z", "ms": 417727599521.2212 } }, "kaala": "sayahna", "days": [ { "local_date": "1983-03-27", "window": { "start": { "local": "1983-03-27T16:01:29+08:00", "utc": "1983-03-27T08:01:29Z", "ms": 417600089495.6307 }, "end": { "local": "1983-03-27T18:29:16+08:00", "utc": "1983-03-27T10:29:16Z", "ms": 417608955969.177 } }, "covered_min": 0, "window_min": 148, "qualifies": false }, { "local_date": "1983-03-28", "window": { "start": { "local": "1983-03-28T16:01:46+08:00", "utc": "1983-03-28T08:01:46Z", "ms": 417686506213.9242 }, "end": { "local": "1983-03-28T18:29:56+08:00", "utc": "1983-03-28T10:29:56Z", "ms": 417695396014.22284 } }, "covered_min": 148, "window_min": 148, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:56 on Mon 28 Mar to 03:27 on Tue 29 Mar.", "fact": "1983-03-27T21:55:35Z → 1983-03-28T19:26:40Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:01–18:29 on the 27th, 16:02–18:30 on the 28th.", "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 148 minutes on the 27th and 148 of 148 on the 28th.", "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 32204 s" }, { "step": "ruling", "text": "Holikā Dahana, Lu’an, 1983: Monday 28 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": "1983-03-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-28", "confidence": "determinate" } ], "quote": "In Lu’an, Holikā Dahana 1983 falls on Monday 28 March. Pūrṇimā runs from 05:56 on Mon 28 Mar to 03:27 on Tue 29 Mar and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/holi", "festival": "holi", "name": "Holī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32204, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-03-28T05:55:35+08:00", "utc": "1983-03-27T21:55:35Z", "ms": 417650134967.7902 }, "end": { "local": "1983-03-29T03:26:40+08:00", "utc": "1983-03-28T19:26:40Z", "ms": 417727599521.2212 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1983-03-28T05:55:35+08:00", "utc": "1983-03-27T21:55:35Z", "ms": 417650134967.7902 }, "end": { "local": "1983-03-29T03:26:40+08:00", "utc": "1983-03-28T19:26:40Z", "ms": 417727599521.2212 } }, "kaala": "sayahna", "days": [ { "local_date": "1983-03-27", "window": { "start": { "local": "1983-03-27T16:01:29+08:00", "utc": "1983-03-27T08:01:29Z", "ms": 417600089495.6307 }, "end": { "local": "1983-03-27T18:29:16+08:00", "utc": "1983-03-27T10:29:16Z", "ms": 417608955969.177 } }, "covered_min": 0, "window_min": 148, "qualifies": false }, { "local_date": "1983-03-28", "window": { "start": { "local": "1983-03-28T16:01:46+08:00", "utc": "1983-03-28T08:01:46Z", "ms": 417686506213.9242 }, "end": { "local": "1983-03-28T18:29:56+08:00", "utc": "1983-03-28T10:29:56Z", "ms": 417695396014.22284 } }, "covered_min": 148, "window_min": 148, "qualifies": true } ], "follows": { "festival": "holika-dahana", "name": "Holikā Dahana", "local_date": "1983-03-28", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:56 on Mon 28 Mar to 03:27 on Tue 29 Mar.", "fact": "1983-03-27T21:55:35Z → 1983-03-28T19:26:40Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:01–18:29 on the 27th, 16:02–18:30 on the 28th.", "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 148 minutes on the 27th and 148 of 148 on the 28th.", "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 32204 s" }, { "step": "counted", "text": "Holī is kept the day after Holikā Dahana: Monday 28 March is the day taken above.", "fact": "follows: holika-dahana + 1 d" }, { "step": "ruling", "text": "Holī, Lu’an, 1983: Tuesday 29 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": "1983-03-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-29", "confidence": "determinate" } ], "quote": "In Lu’an, Holī 1983 falls on Tuesday 29 March. It is kept the day after Holikā Dahana, which falls on Monday 28 March. Pūrṇimā runs from 05:56 on Mon 28 Mar to 03:27 on Tue 29 Mar and covers all of sāyāhna on the 28th.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vasantotsava", "festival": "vasantotsava", "name": "Vasantotsava", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-03-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9671, "anga": { "type": "tithi", "index": 15, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1983-03-29T03:26:40+08:00", "utc": "1983-03-28T19:26:40Z", "ms": 417727599521.2212 }, "end": { "local": "1983-03-30T01:22:42+08:00", "utc": "1983-03-29T17:22:42Z", "ms": 417806562258.42114 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-03-29T03:26:40+08:00", "utc": "1983-03-28T19:26:40Z", "ms": 417727599521.2212 }, "end": { "local": "1983-03-30T01:22:42+08:00", "utc": "1983-03-29T17:22:42Z", "ms": 417806562258.42114 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-03-29", "window": { "start": { "local": "1983-03-29T06:07:51+08:00", "utc": "1983-03-28T22:07:51Z", "ms": 417737270510.81116 }, "end": { "local": "1983-03-29T06:07:51+08:00", "utc": "1983-03-28T22:07:51Z", "ms": 417737270510.81116 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-03-30", "window": { "start": { "local": "1983-03-30T06:06:34+08:00", "utc": "1983-03-29T22:06:34Z", "ms": 417823594126.79224 }, "end": { "local": "1983-03-30T06:06:34+08:00", "utc": "1983-03-29T22:06:34Z", "ms": 417823594126.79224 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 03:27 on Tue 29 Mar to 01:23 on Wed 30 Mar.", "fact": "1983-03-28T19:26:40Z → 1983-03-29T17:22:42Z" }, { "step": "kaala", "text": "Sunrise is at 06:08 on the 29th and 06:07 on the 30th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be current at sunrise. It is on the 29th and is not on the 30th.", "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 9671 s" }, { "step": "ruling", "text": "Vasantotsava, Lu’an, 1983: Tuesday 29 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": "1983-03-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-03-29", "confidence": "determinate" } ], "quote": "In Lu’an, Vasantotsava 1983 falls on Tuesday 29 March. Pratipadā runs from 03:27 on Tue 29 Mar to 01:23 on Wed 30 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-04-01", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3015, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-03-31T23:04:22+08:00", "utc": "1983-03-31T15:04:22Z", "ms": 417971061894.6674 }, "end": { "local": "1983-04-01T23:02:38+08:00", "utc": "1983-04-01T15:02:38Z", "ms": 418057358148.36884 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-03-31T23:04:22+08:00", "utc": "1983-03-31T15:04:22Z", "ms": 417971061894.6674 }, "end": { "local": "1983-04-01T23:02:38+08:00", "utc": "1983-04-01T15:02:38Z", "ms": 418057358148.36884 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-03-31", "window": { "start": { "local": "1983-03-31T21:11:18+08:00", "utc": "1983-03-31T13:11:18Z", "ms": 417964278346.5912 }, "end": { "local": "1983-03-31T21:11:18+08:00", "utc": "1983-03-31T13:11:18Z", "ms": 417964278346.5912 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-04-01", "window": { "start": { "local": "1983-04-01T22:12:23+08:00", "utc": "1983-04-01T14:12:23Z", "ms": 418054342958.15924 }, "end": { "local": "1983-04-01T22:12:23+08:00", "utc": "1983-04-01T14:12:23Z", "ms": 418054342958.15924 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:04 on Thu 31 Mar to 23:03 on Fri 1 Apr.", "fact": "1983-03-31T15:04:22Z → 1983-04-01T15:02:38Z" }, { "step": "kaala", "text": "Moonrise is at 21:11 on the 31st and 22:12 on the 1st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 31st and is on the 1st.", "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 3015 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Friday 1 April.", "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": "1983-04-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-01", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Friday 1 April. Caturthī runs from 23:04 on Thu 31 Mar to 23:03 on Fri 1 Apr and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-04-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shitalashtami", "festival": "shitalashtami", "name": "Śītalāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21493, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-04-05T03:25:42+08:00", "utc": "1983-04-04T19:25:42Z", "ms": 418332342194.6948 }, "end": { "local": "1983-04-06T05:54:37+08:00", "utc": "1983-04-05T21:54:37Z", "ms": 418427677212.8804 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-05T03:25:42+08:00", "utc": "1983-04-04T19:25:42Z", "ms": 418332342194.6948 }, "end": { "local": "1983-04-06T05:54:37+08:00", "utc": "1983-04-05T21:54:37Z", "ms": 418427677212.8804 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-05", "window": { "start": { "local": "1983-04-05T11:53:08+08:00", "utc": "1983-04-05T03:53:08Z", "ms": 418362787786.69244 }, "end": { "local": "1983-04-05T12:41:08+08:00", "utc": "1983-04-05T04:41:08Z", "ms": 418365667786.69244 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-04-06", "window": { "start": { "local": "1983-04-06T11:52:50+08:00", "utc": "1983-04-06T03:52:50Z", "ms": 418449170447.43604 }, "end": { "local": "1983-04-06T12:40:50+08:00", "utc": "1983-04-06T04:40:50Z", "ms": 418452050447.43604 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 03:26 on Tue 5 Apr to 05:55 on Wed 6 Apr.", "fact": "1983-04-04T19:25:42Z → 1983-04-05T21:54:37Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 5th, 11:53–12:41 on the 6th.", "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 5th and 0 of 48 on the 6th.", "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 21493 s" }, { "step": "ruling", "text": "Śītalāṣṭamī, Lu’an, 1983: Tuesday 5 April.", "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": "1983-04-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-05", "confidence": "determinate" } ], "quote": "In Lu’an, Śītalāṣṭamī 1983 falls on Tuesday 5 April. Aṣṭamī runs from 03:26 on Tue 5 Apr to 05:55 on Wed 6 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-04-09", "festival": "ekadashi", "name": "Pāpamocanī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18153, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-04-08T10:57:50+08:00", "utc": "1983-04-08T02:57:50Z", "ms": 418618670382.0187 }, "end": { "local": "1983-04-09T13:03:35+08:00", "utc": "1983-04-09T05:03:35Z", "ms": 418712615421.3427 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-08T10:57:50+08:00", "utc": "1983-04-08T02:57:50Z", "ms": 418618670382.0187 }, "end": { "local": "1983-04-09T13:03:35+08:00", "utc": "1983-04-09T05:03:35Z", "ms": 418712615421.3427 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-04-08", "window": { "start": { "local": "1983-04-08T05:55:17+08:00", "utc": "1983-04-07T21:55:17Z", "ms": 418600516898.9331 }, "end": { "local": "1983-04-08T05:55:17+08:00", "utc": "1983-04-07T21:55:17Z", "ms": 418600516898.9331 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-04-09", "window": { "start": { "local": "1983-04-09T05:54:03+08:00", "utc": "1983-04-08T21:54:03Z", "ms": 418686843310.9015 }, "end": { "local": "1983-04-09T05:54:03+08:00", "utc": "1983-04-08T21:54:03Z", "ms": 418686843310.9015 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:58 on Fri 8 Apr to 13:04 on Sat 9 Apr.", "fact": "1983-04-08T02:57:50Z → 1983-04-09T05:03:35Z" }, { "step": "kaala", "text": "Sunrise is at 05:55 on the 8th and 05:54 on the 9th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 8th and is on the 9th.", "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 18153 s" }, { "step": "ruling", "text": "Pāpamocanī Ekādaśī, Lu’an, 1983: Saturday 9 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": "1983-04-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-09", "confidence": "determinate" } ], "quote": "In Lu’an, Pāpamocanī Ekādaśī 1983 falls on Saturday 9 April. Ekādaśī runs from 10:58 on Fri 8 Apr to 13:04 on Sat 9 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-04-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-04-10", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10784, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-04-10T14:38:55+08:00", "utc": "1983-04-10T06:38:55Z", "ms": 418804735383.7817 }, "end": { "local": "1983-04-11T15:39:33+08:00", "utc": "1983-04-11T07:39:33Z", "ms": 418894772620.3251 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-10T14:38:55+08:00", "utc": "1983-04-10T06:38:55Z", "ms": 418804735383.7817 }, "end": { "local": "1983-04-11T15:39:33+08:00", "utc": "1983-04-11T07:39:33Z", "ms": 418894772620.3251 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-04-10", "window": { "start": { "local": "1983-04-10T18:38:36+08:00", "utc": "1983-04-10T10:38:36Z", "ms": 418819116423.7956 }, "end": { "local": "1983-04-10T20:08:21+08:00", "utc": "1983-04-10T12:08:21Z", "ms": 418824500561.6057 } }, "covered_min": 90, "window_min": 90, "qualifies": true }, { "local_date": "1983-04-11", "window": { "start": { "local": "1983-04-11T18:39:17+08:00", "utc": "1983-04-11T10:39:17Z", "ms": 418905556803.3085 }, "end": { "local": "1983-04-11T20:08:46+08:00", "utc": "1983-04-11T12:08:46Z", "ms": 418910925928.6959 } }, "covered_min": 0, "window_min": 89, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 14:39 on Sun 10 Apr to 15:40 on Mon 11 Apr.", "fact": "1983-04-10T06:38:55Z → 1983-04-11T07:39:33Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:39–20:08 on the 10th, 18:39–20:09 on the 11th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 90 of 90 minutes on the 10th and 0 of 89 on the 11th.", "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 10784 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Sunday 10 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": "1983-04-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-10", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Sunday 10 April. Trayodaśī runs from 14:39 on Sun 10 Apr to 15:40 on Mon 11 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-04-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-04-11", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27927, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-04-11T15:39:33+08:00", "utc": "1983-04-11T07:39:33Z", "ms": 418894772620.3251 }, "end": { "local": "1983-04-12T16:05:09+08:00", "utc": "1983-04-12T08:05:09Z", "ms": 418982708695.67126 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-11T15:39:33+08:00", "utc": "1983-04-11T07:39:33Z", "ms": 418894772620.3251 }, "end": { "local": "1983-04-12T16:05:09+08:00", "utc": "1983-04-12T08:05:09Z", "ms": 418982708695.67126 } }, "kaala": "nishita", "days": [ { "local_date": "1983-04-11", "window": { "start": { "local": "1983-04-11T23:50:51+08:00", "utc": "1983-04-11T15:50:51Z", "ms": 418924251023.5115 }, "end": { "local": "1983-04-12T00:38:51+08:00", "utc": "1983-04-11T16:38:51Z", "ms": 418927131023.5115 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-04-12", "window": { "start": { "local": "1983-04-12T23:50:35+08:00", "utc": "1983-04-12T15:50:35Z", "ms": 419010635400.9208 }, "end": { "local": "1983-04-13T00:38:35+08:00", "utc": "1983-04-12T16:38:35Z", "ms": 419013515400.9208 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 15:40 on Mon 11 Apr to 16:05 on Tue 12 Apr.", "fact": "1983-04-11T07:39:33Z → 1983-04-12T08:05:09Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:51–00:39 on the 11th, 23:51–00:39 on the 12th.", "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 11th and 0 of 48 on the 12th.", "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 27927 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Monday 11 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": "1983-04-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-11", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Monday 11 April. Caturdaśī runs from 15:40 on Mon 11 Apr to 16:05 on Tue 12 Apr and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-04-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/vaishakhi", "festival": "vaishakhi", "name": "Vaiśākhī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19705, "anga": { "type": "sankranti", "index": 0, "key": "mesha", "name": "Meṣa", "start": { "local": "1983-04-14T11:16:27+08:00", "utc": "1983-04-14T03:16:27Z", "ms": 419138187094.316 }, "end": { "local": "1983-05-15T08:09:26+08:00", "utc": "1983-05-15T00:09:26Z", "ms": 421805365544.5818 } }, "span": { "of": "transit", "start": { "local": "1983-04-14T11:16:27+08:00", "utc": "1983-04-14T03:16:27Z", "ms": 419138187094.316 }, "end": { "local": "1983-04-14T11:16:27+08:00", "utc": "1983-04-14T03:16:27Z", "ms": 419138187094.316 } }, "kaala": "day", "days": [ { "local_date": "1983-04-13", "window": { "start": { "local": "1983-04-13T05:49:14+08:00", "utc": "1983-04-12T21:49:14Z", "ms": 419032153539.2402 }, "end": { "local": "1983-04-14T05:48:02+08:00", "utc": "1983-04-13T21:48:02Z", "ms": 419118482368.72577 } }, "covered_min": 0, "window_min": 1439, "qualifies": false }, { "local_date": "1983-04-14", "window": { "start": { "local": "1983-04-14T05:48:02+08:00", "utc": "1983-04-13T21:48:02Z", "ms": 419118482368.72577 }, "end": { "local": "1983-04-15T05:46:52+08:00", "utc": "1983-04-14T21:46:52Z", "ms": 419204811756.6203 } }, "covered_min": 1, "window_min": 1439, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Meṣa at 11:16 on Thu 14 Apr.", "fact": "1983-04-14T03:16:27Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 05:49 on the 13th, and from 05:48 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 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 sunrise → only-day · margin 19705 s" }, { "step": "ruling", "text": "Vaiśākhī, Lu’an, 1983: Thursday 14 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": "1983-04-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1983-04-14", "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": "1983-04-14", "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 Lu’an, Vaiśākhī 1983 falls on Thursday 14 April. The Sun enters Meṣa at 11:16 on Thu 14 Apr, and the rule counts the day from sunrise.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/navaratra-arambha-caitra", "festival": "navaratra-arambha-caitra", "name": "Navarātrārambha (Caitra)", "everyday": "Chaitra Navratri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9879, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1983-04-13T15:58:19+08:00", "utc": "1983-04-13T07:58:19Z", "ms": 419068698872.5424 }, "end": { "local": "1983-04-14T15:23:20+08:00", "utc": "1983-04-14T07:23:20Z", "ms": 419152999503.01605 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-13T15:58:19+08:00", "utc": "1983-04-13T07:58:19Z", "ms": 419068698872.5424 }, "end": { "local": "1983-04-14T15:23:20+08:00", "utc": "1983-04-14T07:23:20Z", "ms": 419152999503.01605 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-13", "window": { "start": { "local": "1983-04-13T11:50:56+08:00", "utc": "1983-04-13T03:50:56Z", "ms": 419053855671.32715 }, "end": { "local": "1983-04-13T12:38:56+08:00", "utc": "1983-04-13T04:38:56Z", "ms": 419056735671.32715 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-04-14", "window": { "start": { "local": "1983-04-14T11:50:40+08:00", "utc": "1983-04-14T03:50:40Z", "ms": 419140240397.5687 }, "end": { "local": "1983-04-14T12:38:40+08:00", "utc": "1983-04-14T04:38:40Z", "ms": 419143120397.5687 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 15:58 on Wed 13 Apr to 15:23 on Thu 14 Apr.", "fact": "1983-04-13T07:58:19Z → 1983-04-14T07:23:20Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 13th, 11:51–12:39 on the 14th.", "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 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: paraviddha → only-day · margin 9879 s" }, { "step": "ruling", "text": "Navarātrārambha (Caitra), Lu’an, 1983: Thursday 14 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": "1983-04-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-14", "confidence": "determinate" } ], "quote": "In Lu’an, Navarātrārambha (Caitra) (Chaitra Navratri) 1983 falls on Thursday 14 April. Pratipadā runs from 15:58 on Wed 13 Apr to 15:23 on Thu 14 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/gauri-tritiya", "festival": "gauri-tritiya", "name": "Gaurī Tṛtīyā", "everyday": "Gangaur", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1802, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-04-15T14:25:04+08:00", "utc": "1983-04-15T06:25:04Z", "ms": 419235903713.274 }, "end": { "local": "1983-04-16T13:08:12+08:00", "utc": "1983-04-16T05:08:12Z", "ms": 419317692494.6725 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-15T14:25:04+08:00", "utc": "1983-04-15T06:25:04Z", "ms": 419235903713.274 }, "end": { "local": "1983-04-16T13:08:12+08:00", "utc": "1983-04-16T05:08:12Z", "ms": 419317692494.6725 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-15", "window": { "start": { "local": "1983-04-15T11:50:25+08:00", "utc": "1983-04-15T03:50:25Z", "ms": 419226625443.946 }, "end": { "local": "1983-04-15T12:38:25+08:00", "utc": "1983-04-15T04:38:25Z", "ms": 419229505443.946 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-04-16", "window": { "start": { "local": "1983-04-16T11:50:11+08:00", "utc": "1983-04-16T03:50:11Z", "ms": 419313010822.03467 }, "end": { "local": "1983-04-16T12:38:11+08:00", "utc": "1983-04-16T04:38:11Z", "ms": 419315890822.03467 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 14:25 on Fri 15 Apr to 13:08 on Sat 16 Apr.", "fact": "1983-04-15T06:25:04Z → 1983-04-16T05:08:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 15th, 11:50–12:38 on the 16th.", "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 15th and 48 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: unstated → only-day · margin 1802 s" }, { "step": "ruling", "text": "Gaurī Tṛtīyā, Lu’an, 1983: Saturday 16 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": "1983-04-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-16", "confidence": "determinate" } ], "quote": "In Lu’an, Gaurī Tṛtīyā (Gangaur) 1983 falls on Saturday 16 April. Tṛtīyā runs from 14:25 on Fri 15 Apr to 13:08 on Sat 16 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/saubhagya-shayana-vrata", "festival": "saubhagya-shayana-vrata", "name": "Saubhāgya Śayana Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1802, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-04-15T14:25:04+08:00", "utc": "1983-04-15T06:25:04Z", "ms": 419235903713.274 }, "end": { "local": "1983-04-16T13:08:12+08:00", "utc": "1983-04-16T05:08:12Z", "ms": 419317692494.6725 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-15T14:25:04+08:00", "utc": "1983-04-15T06:25:04Z", "ms": 419235903713.274 }, "end": { "local": "1983-04-16T13:08:12+08:00", "utc": "1983-04-16T05:08:12Z", "ms": 419317692494.6725 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-15", "window": { "start": { "local": "1983-04-15T11:50:25+08:00", "utc": "1983-04-15T03:50:25Z", "ms": 419226625443.946 }, "end": { "local": "1983-04-15T12:38:25+08:00", "utc": "1983-04-15T04:38:25Z", "ms": 419229505443.946 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-04-16", "window": { "start": { "local": "1983-04-16T11:50:11+08:00", "utc": "1983-04-16T03:50:11Z", "ms": 419313010822.03467 }, "end": { "local": "1983-04-16T12:38:11+08:00", "utc": "1983-04-16T04:38:11Z", "ms": 419315890822.03467 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 14:25 on Fri 15 Apr to 13:08 on Sat 16 Apr.", "fact": "1983-04-15T06:25:04Z → 1983-04-16T05:08:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 15th, 11:50–12:38 on the 16th.", "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 15th and 48 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 1802 s" }, { "step": "ruling", "text": "Saubhāgya Śayana Vrata, Lu’an, 1983: Saturday 16 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": "1983-04-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-16", "confidence": "determinate" } ], "quote": "In Lu’an, Saubhāgya Śayana Vrata 1983 falls on Saturday 16 April. Tṛtīyā runs from 14:25 on Fri 15 Apr to 13:08 on Sat 16 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/lakshmi-panchami", "festival": "lakshmi-panchami", "name": "Lakṣmī Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 793, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1983-04-17T11:36:44+08:00", "utc": "1983-04-17T03:36:44Z", "ms": 419398603510.6794 }, "end": { "local": "1983-04-18T09:53:38+08:00", "utc": "1983-04-18T01:53:38Z", "ms": 419478817806.08734 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-17T11:36:44+08:00", "utc": "1983-04-17T03:36:44Z", "ms": 419398603510.6794 }, "end": { "local": "1983-04-18T09:53:38+08:00", "utc": "1983-04-18T01:53:38Z", "ms": 419478817806.08734 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-17", "window": { "start": { "local": "1983-04-17T11:49:57+08:00", "utc": "1983-04-17T03:49:57Z", "ms": 419399396543.15625 }, "end": { "local": "1983-04-17T12:37:57+08:00", "utc": "1983-04-17T04:37:57Z", "ms": 419402276543.15625 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-04-18", "window": { "start": { "local": "1983-04-18T11:49:43+08:00", "utc": "1983-04-18T03:49:43Z", "ms": 419485782618.6485 }, "end": { "local": "1983-04-18T12:37:43+08:00", "utc": "1983-04-18T04:37:43Z", "ms": 419488662618.6485 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 11:37 on Sun 17 Apr to 09:54 on Mon 18 Apr.", "fact": "1983-04-17T03:36:44Z → 1983-04-18T01:53:38Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 17th, 11:50–12:38 on the 18th.", "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 17th and 0 of 48 on the 18th.", "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 793 s" }, { "step": "ruling", "text": "Lakṣmī Pañcamī, Lu’an, 1983: Sunday 17 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": "1983-04-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-17", "confidence": "determinate" } ], "quote": "In Lu’an, Lakṣmī Pañcamī 1983 falls on Sunday 17 April. Pañcamī runs from 11:37 on Sun 17 Apr to 09:54 on Mon 18 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-04-17", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 793, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-04-16T13:08:12+08:00", "utc": "1983-04-16T05:08:12Z", "ms": 419317692494.6725 }, "end": { "local": "1983-04-17T11:36:44+08:00", "utc": "1983-04-17T03:36:44Z", "ms": 419398603510.6794 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-16T13:08:12+08:00", "utc": "1983-04-16T05:08:12Z", "ms": 419317692494.6725 }, "end": { "local": "1983-04-17T11:36:44+08:00", "utc": "1983-04-17T03:36:44Z", "ms": 419398603510.6794 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-16", "window": { "start": { "local": "1983-04-16T11:50:11+08:00", "utc": "1983-04-16T03:50:11Z", "ms": 419313010822.03467 }, "end": { "local": "1983-04-16T12:38:11+08:00", "utc": "1983-04-16T04:38:11Z", "ms": 419315890822.03467 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-04-17", "window": { "start": { "local": "1983-04-17T11:49:57+08:00", "utc": "1983-04-17T03:49:57Z", "ms": 419399396543.15625 }, "end": { "local": "1983-04-17T12:37:57+08:00", "utc": "1983-04-17T04:37:57Z", "ms": 419402276543.15625 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 13:08 on Sat 16 Apr to 11:37 on Sun 17 Apr.", "fact": "1983-04-16T05:08:12Z → 1983-04-17T03:36:44Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 16th, 11:50–12:38 on the 17th.", "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 16th and 0 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: unstated → second-day · margin 793 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Sunday 17 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": "1983-04-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-17", "confidence": "boundary" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Sunday 17 April. Caturthī runs from 13:08 on Sat 16 Apr to 11:37 on Sun 17 Apr, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-04-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/bhavani-utpatti", "festival": "bhavani-utpatti", "name": "Bhavānī Utpatti", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20923, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-04-20T06:00:33+08:00", "utc": "1983-04-19T22:00:33Z", "ms": 419637632906.10675 }, "end": { "local": "1983-04-21T03:53:31+08:00", "utc": "1983-04-20T19:53:31Z", "ms": 419716411001.49695 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-20T06:00:33+08:00", "utc": "1983-04-19T22:00:33Z", "ms": 419637632906.10675 }, "end": { "local": "1983-04-21T03:53:31+08:00", "utc": "1983-04-20T19:53:31Z", "ms": 419716411001.49695 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-20", "window": { "start": { "local": "1983-04-20T11:49:16+08:00", "utc": "1983-04-20T03:49:16Z", "ms": 419658555879.7554 }, "end": { "local": "1983-04-20T12:37:16+08:00", "utc": "1983-04-20T04:37:16Z", "ms": 419661435879.7554 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-04-21", "window": { "start": { "local": "1983-04-21T11:49:03+08:00", "utc": "1983-04-21T03:49:03Z", "ms": 419744943090.32446 }, "end": { "local": "1983-04-21T12:37:03+08:00", "utc": "1983-04-21T04:37:03Z", "ms": 419747823090.32446 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 06:01 on Wed 20 Apr to 03:54 on Thu 21 Apr.", "fact": "1983-04-19T22:00:33Z → 1983-04-20T19:53:31Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 20th, 11:49–12:37 on the 21st.", "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 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: paraviddha → only-day · margin 20923 s" }, { "step": "ruling", "text": "Bhavānī Utpatti, Lu’an, 1983: Wednesday 20 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": "1983-04-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-20", "confidence": "determinate" } ], "quote": "In Lu’an, Bhavānī Utpatti 1983 falls on Wednesday 20 April. Aṣṭamī runs from 06:01 on Wed 20 Apr to 03:54 on Thu 21 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/rama-navami", "festival": "rama-navami", "name": "Rāma Navamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28532, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1983-04-21T03:53:31+08:00", "utc": "1983-04-20T19:53:31Z", "ms": 419716411001.49695 }, "end": { "local": "1983-04-22T01:41:44+08:00", "utc": "1983-04-21T17:41:44Z", "ms": 419794904226.86224 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-21T03:53:31+08:00", "utc": "1983-04-20T19:53:31Z", "ms": 419716411001.49695 }, "end": { "local": "1983-04-22T01:41:44+08:00", "utc": "1983-04-21T17:41:44Z", "ms": 419794904226.86224 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-21", "window": { "start": { "local": "1983-04-21T11:49:03+08:00", "utc": "1983-04-21T03:49:03Z", "ms": 419744943090.32446 }, "end": { "local": "1983-04-21T12:37:03+08:00", "utc": "1983-04-21T04:37:03Z", "ms": 419747823090.32446 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-04-22", "window": { "start": { "local": "1983-04-22T11:48:51+08:00", "utc": "1983-04-22T03:48:51Z", "ms": 419831330705.3995 }, "end": { "local": "1983-04-22T12:36:51+08:00", "utc": "1983-04-22T04:36:51Z", "ms": 419834210705.3995 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 03:54 on Thu 21 Apr to 01:42 on Fri 22 Apr.", "fact": "1983-04-20T19:53:31Z → 1983-04-21T17:41:44Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 21st, 11:49–12:37 on the 22nd.", "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 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: unstated → only-day · margin 28532 s" }, { "step": "ruling", "text": "Rāma Navamī, Lu’an, 1983: Thursday 21 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": "1983-04-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-21", "confidence": "determinate" } ], "quote": "In Lu’an, Rāma Navamī 1983 falls on Thursday 21 April. Navamī runs from 03:54 on Thu 21 Apr to 01:42 on Fri 22 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-04-23", "festival": "ekadashi", "name": "Kāmadā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22203, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-04-22T23:27:47+08:00", "utc": "1983-04-22T15:27:47Z", "ms": 419873267296.908 }, "end": { "local": "1983-04-23T21:15:20+08:00", "utc": "1983-04-23T13:15:20Z", "ms": 419951720020.1371 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-22T23:27:47+08:00", "utc": "1983-04-22T15:27:47Z", "ms": 419873267296.908 }, "end": { "local": "1983-04-23T21:15:20+08:00", "utc": "1983-04-23T13:15:20Z", "ms": 419951720020.1371 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-04-23", "window": { "start": { "local": "1983-04-23T05:37:50+08:00", "utc": "1983-04-22T21:37:50Z", "ms": 419895469952.8668 }, "end": { "local": "1983-04-23T05:37:50+08:00", "utc": "1983-04-22T21:37:50Z", "ms": 419895469952.8668 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-04-24", "window": { "start": { "local": "1983-04-24T05:36:46+08:00", "utc": "1983-04-23T21:36:46Z", "ms": 419981805510.3924 }, "end": { "local": "1983-04-24T05:36:46+08:00", "utc": "1983-04-23T21:36:46Z", "ms": 419981805510.3924 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 23:28 on Fri 22 Apr to 21:15 on Sat 23 Apr.", "fact": "1983-04-22T15:27:47Z → 1983-04-23T13:15:20Z" }, { "step": "kaala", "text": "Sunrise is at 05:38 on the 23rd and 05:37 on the 24th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 23rd and is not on the 24th.", "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 22203 s" }, { "step": "ruling", "text": "Kāmadā Ekādaśī, Lu’an, 1983: Saturday 23 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": "1983-04-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-23", "confidence": "determinate" } ], "quote": "In Lu’an, Kāmadā Ekādaśī 1983 falls on Saturday 23 April. Ekādaśī runs from 23:28 on Fri 22 Apr to 21:15 on Sat 23 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-04-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-04-24", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1263, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-04-24T19:09:12+08:00", "utc": "1983-04-24T11:09:12Z", "ms": 420030552282.6971 }, "end": { "local": "1983-04-25T17:15:17+08:00", "utc": "1983-04-25T09:15:17Z", "ms": 420110116639.1535 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-24T19:09:12+08:00", "utc": "1983-04-24T11:09:12Z", "ms": 420030552282.6971 }, "end": { "local": "1983-04-25T17:15:17+08:00", "utc": "1983-04-25T09:15:17Z", "ms": 420110116639.1535 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-04-24", "window": { "start": { "local": "1983-04-24T18:48:09+08:00", "utc": "1983-04-24T10:48:09Z", "ms": 420029288902.945 }, "end": { "local": "1983-04-24T20:14:29+08:00", "utc": "1983-04-24T12:14:29Z", "ms": 420034469301.3232 } }, "covered_min": 65, "window_min": 86, "qualifies": true }, { "local_date": "1983-04-25", "window": { "start": { "local": "1983-04-25T18:48:50+08:00", "utc": "1983-04-25T10:48:50Z", "ms": 420115730354.8328 }, "end": { "local": "1983-04-25T20:14:57+08:00", "utc": "1983-04-25T12:14:57Z", "ms": 420120896857.2272 } }, "covered_min": 0, "window_min": 86, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:09 on Sun 24 Apr to 17:15 on Mon 25 Apr.", "fact": "1983-04-24T11:09:12Z → 1983-04-25T09:15:17Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:48–20:14 on the 24th, 18:49–20:15 on the 25th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 65 of 86 minutes on the 24th and 0 of 86 on the 25th.", "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 1263 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Sunday 24 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": "1983-04-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-24", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Sunday 24 April. Trayodaśī runs from 19:09 on Sun 24 Apr to 17:15 on Mon 25 Apr and covers 65 of 86 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-04-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ananga-trayodashi", "festival": "ananga-trayodashi", "name": "Anaṅga Trayodaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16741, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-04-24T19:09:12+08:00", "utc": "1983-04-24T11:09:12Z", "ms": 420030552282.6971 }, "end": { "local": "1983-04-25T17:15:17+08:00", "utc": "1983-04-25T09:15:17Z", "ms": 420110116639.1535 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-24T19:09:12+08:00", "utc": "1983-04-24T11:09:12Z", "ms": 420030552282.6971 }, "end": { "local": "1983-04-25T17:15:17+08:00", "utc": "1983-04-25T09:15:17Z", "ms": 420110116639.1535 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-24", "window": { "start": { "local": "1983-04-24T11:48:27+08:00", "utc": "1983-04-24T03:48:27Z", "ms": 420004107206.6687 }, "end": { "local": "1983-04-24T12:36:27+08:00", "utc": "1983-04-24T04:36:27Z", "ms": 420006987206.6687 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-04-25", "window": { "start": { "local": "1983-04-25T11:48:16+08:00", "utc": "1983-04-25T03:48:16Z", "ms": 420090496122.807 }, "end": { "local": "1983-04-25T12:36:16+08:00", "utc": "1983-04-25T04:36:16Z", "ms": 420093376122.807 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:09 on Sun 24 Apr to 17:15 on Mon 25 Apr.", "fact": "1983-04-24T11:09:12Z → 1983-04-25T09:15:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 24th, 11:48–12:36 on the 25th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during madhyāhna. 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. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 16741 s" }, { "step": "ruling", "text": "Anaṅga Trayodaśī, Lu’an, 1983: Monday 25 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": "1983-04-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-25", "confidence": "determinate" } ], "quote": "In Lu’an, Anaṅga Trayodaśī 1983 falls on Monday 25 April. Trayodaśī runs from 19:09 on Sun 24 Apr to 17:15 on Mon 25 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vishnu-damanaka-chaturdashi", "festival": "vishnu-damanaka-chaturdashi", "name": "Viṣṇudamanaka Caturdaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11044, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-04-25T17:15:17+08:00", "utc": "1983-04-25T09:15:17Z", "ms": 420110116639.1535 }, "end": { "local": "1983-04-26T15:40:09+08:00", "utc": "1983-04-26T07:40:09Z", "ms": 420190809216.64453 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-25T17:15:17+08:00", "utc": "1983-04-25T09:15:17Z", "ms": 420110116639.1535 }, "end": { "local": "1983-04-26T15:40:09+08:00", "utc": "1983-04-26T07:40:09Z", "ms": 420190809216.64453 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-25", "window": { "start": { "local": "1983-04-25T11:48:16+08:00", "utc": "1983-04-25T03:48:16Z", "ms": 420090496122.807 }, "end": { "local": "1983-04-25T12:36:16+08:00", "utc": "1983-04-25T04:36:16Z", "ms": 420093376122.807 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-04-26", "window": { "start": { "local": "1983-04-26T11:48:06+08:00", "utc": "1983-04-26T03:48:06Z", "ms": 420176885502.7737 }, "end": { "local": "1983-04-26T12:36:06+08:00", "utc": "1983-04-26T04:36:06Z", "ms": 420179765502.7737 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 17:15 on Mon 25 Apr to 15:40 on Tue 26 Apr.", "fact": "1983-04-25T09:15:17Z → 1983-04-26T07:40:09Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 25th, 11:48–12:36 on the 26th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 25th and 48 of 48 on the 26th.", "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 11044 s" }, { "step": "ruling", "text": "Viṣṇudamanaka Caturdaśī, Lu’an, 1983: Tuesday 26 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": "1983-04-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-26", "confidence": "determinate" } ], "quote": "In Lu’an, Viṣṇudamanaka Caturdaśī 1983 falls on Tuesday 26 April. Caturdaśī runs from 17:15 on Mon 25 Apr to 15:40 on Tue 26 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/chaitri-purnima", "festival": "chaitri-purnima", "name": "Caitrī Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6884, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-04-26T15:40:09+08:00", "utc": "1983-04-26T07:40:09Z", "ms": 420190809216.64453 }, "end": { "local": "1983-04-27T14:30:40+08:00", "utc": "1983-04-27T06:30:40Z", "ms": 420273039533.2908 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1983-04-26T15:40:09+08:00", "utc": "1983-04-26T07:40:09Z", "ms": 420190809216.64453 }, "end": { "local": "1983-04-27T14:30:40+08:00", "utc": "1983-04-27T06:30:40Z", "ms": 420273039533.2908 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-04-26", "window": { "start": { "local": "1983-04-26T11:48:06+08:00", "utc": "1983-04-26T03:48:06Z", "ms": 420176885502.7737 }, "end": { "local": "1983-04-26T12:36:06+08:00", "utc": "1983-04-26T04:36:06Z", "ms": 420179765502.7737 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-04-27", "window": { "start": { "local": "1983-04-27T11:47:55+08:00", "utc": "1983-04-27T03:47:55Z", "ms": 420263275361.3365 }, "end": { "local": "1983-04-27T12:35:55+08:00", "utc": "1983-04-27T04:35:55Z", "ms": 420266155361.3365 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 15:40 on Tue 26 Apr to 14:31 on Wed 27 Apr.", "fact": "1983-04-26T07:40:09Z → 1983-04-27T06:30:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 26th, 11:48–12:36 on the 27th.", "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 26th and 48 of 48 on the 27th.", "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 6884 s" }, { "step": "ruling", "text": "Caitrī Pūrṇimā, Lu’an, 1983: Wednesday 27 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": "1983-04-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-27", "confidence": "determinate" } ], "quote": "In Lu’an, Caitrī Pūrṇimā 1983 falls on Wednesday 27 April. Pūrṇimā runs from 15:40 on Tue 26 Apr to 14:31 on Wed 27 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-04-30", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-04-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25355, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-04-30T14:31:52+08:00", "utc": "1983-04-30T06:31:52Z", "ms": 420532311862.07294 }, "end": { "local": "1983-05-01T15:50:03+08:00", "utc": "1983-05-01T07:50:03Z", "ms": 420623402945.3984 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-04-30T14:31:52+08:00", "utc": "1983-04-30T06:31:52Z", "ms": 420532311862.07294 }, "end": { "local": "1983-05-01T15:50:03+08:00", "utc": "1983-05-01T07:50:03Z", "ms": 420623402945.3984 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-04-30", "window": { "start": { "local": "1983-04-30T21:56:38+08:00", "utc": "1983-04-30T13:56:38Z", "ms": 420558998477.44904 }, "end": { "local": "1983-04-30T21:56:38+08:00", "utc": "1983-04-30T13:56:38Z", "ms": 420558998477.44904 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-05-01", "window": { "start": { "local": "1983-05-01T22:52:38+08:00", "utc": "1983-05-01T14:52:38Z", "ms": 420648757657.393 }, "end": { "local": "1983-05-01T22:52:38+08:00", "utc": "1983-05-01T14:52:38Z", "ms": 420648757657.393 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 14:32 on Sat 30 Apr to 15:50 on Sun 1 May.", "fact": "1983-04-30T06:31:52Z → 1983-05-01T07:50:03Z" }, { "step": "kaala", "text": "Moonrise is at 21:57 on the 30th and 22:53 on the 1st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 30th and is not on the 1st.", "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 25355 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Saturday 30 April.", "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": "1983-04-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-04-30", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Saturday 30 April. Caturthī runs from 14:32 on Sat 30 Apr to 15:50 on Sun 1 May and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-04-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-05-09", "festival": "ekadashi", "name": "Varūthinī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1357, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-05-08T04:42:58+08:00", "utc": "1983-05-07T20:42:58Z", "ms": 421188178107.7748 }, "end": { "local": "1983-05-09T05:45:10+08:00", "utc": "1983-05-08T21:45:10Z", "ms": 421278310455.68396 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-08T04:42:58+08:00", "utc": "1983-05-07T20:42:58Z", "ms": 421188178107.7748 }, "end": { "local": "1983-05-09T05:45:10+08:00", "utc": "1983-05-08T21:45:10Z", "ms": 421278310455.68396 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-05-08", "window": { "start": { "local": "1983-05-08T05:23:22+08:00", "utc": "1983-05-07T21:23:22Z", "ms": 421190602358.30554 }, "end": { "local": "1983-05-08T05:23:22+08:00", "utc": "1983-05-07T21:23:22Z", "ms": 421190602358.30554 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-05-09", "window": { "start": { "local": "1983-05-09T05:22:33+08:00", "utc": "1983-05-08T21:22:33Z", "ms": 421276953107.52875 }, "end": { "local": "1983-05-09T05:22:33+08:00", "utc": "1983-05-08T21:22:33Z", "ms": 421276953107.52875 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 04:43 on Sun 8 May to 05:45 on Mon 9 May.", "fact": "1983-05-07T20:42:58Z → 1983-05-08T21:45:10Z" }, { "step": "kaala", "text": "Sunrise is at 05:23 on the 8th and 05:23 on the 9th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 8th and is on the 9th.", "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 1357 s" }, { "step": "ruling", "text": "Varūthinī Ekādaśī, Lu’an, 1983: Monday 9 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": "1983-05-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-09", "confidence": "determinate" } ], "quote": "In Lu’an, Varūthinī Ekādaśī 1983 falls on Monday 9 May. Ekādaśī runs from 04:43 on Sun 8 May to 05:45 on Mon 9 May and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-05-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-05-10", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33933, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-05-10T06:06:37+08:00", "utc": "1983-05-09T22:06:37Z", "ms": 421365996886.31433 }, "end": { "local": "1983-05-11T05:47:45+08:00", "utc": "1983-05-10T21:47:45Z", "ms": 421451265281.4399 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-10T06:06:37+08:00", "utc": "1983-05-09T22:06:37Z", "ms": 421365996886.31433 }, "end": { "local": "1983-05-11T05:47:45+08:00", "utc": "1983-05-10T21:47:45Z", "ms": 421451265281.4399 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-05-09", "window": { "start": { "local": "1983-05-09T18:58:37+08:00", "utc": "1983-05-09T10:58:37Z", "ms": 421325917057.41693 }, "end": { "local": "1983-05-09T20:21:42+08:00", "utc": "1983-05-09T12:21:42Z", "ms": 421330902124.88367 } }, "covered_min": 0, "window_min": 83, "qualifies": false }, { "local_date": "1983-05-10", "window": { "start": { "local": "1983-05-10T18:59:19+08:00", "utc": "1983-05-10T10:59:19Z", "ms": 421412359054.4972 }, "end": { "local": "1983-05-10T20:22:12+08:00", "utc": "1983-05-10T12:22:12Z", "ms": 421417332279.9655 } }, "covered_min": 83, "window_min": 83, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 06:07 on Tue 10 May to 05:48 on Wed 11 May.", "fact": "1983-05-09T22:06:37Z → 1983-05-10T21:47:45Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:59–20:22 on the 9th, 18:59–20:22 on the 10th.", "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 83 minutes on the 9th and 83 of 83 on the 10th.", "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 33933 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Tuesday 10 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": "1983-05-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-10", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Tuesday 10 May. Trayodaśī runs from 06:07 on Tue 10 May to 05:48 on Wed 11 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-05-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-05-11", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15479, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-05-11T05:47:45+08:00", "utc": "1983-05-10T21:47:45Z", "ms": 421451265281.4399 }, "end": { "local": "1983-05-12T04:52:05+08:00", "utc": "1983-05-11T20:52:05Z", "ms": 421534325484.73804 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-11T05:47:45+08:00", "utc": "1983-05-10T21:47:45Z", "ms": 421451265281.4399 }, "end": { "local": "1983-05-12T04:52:05+08:00", "utc": "1983-05-11T20:52:05Z", "ms": 421534325484.73804 } }, "kaala": "nishita", "days": [ { "local_date": "1983-05-10", "window": { "start": { "local": "1983-05-10T23:46:09+08:00", "utc": "1983-05-10T15:46:09Z", "ms": 421429568650.0034 }, "end": { "local": "1983-05-11T00:34:09+08:00", "utc": "1983-05-10T16:34:09Z", "ms": 421432448650.0034 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-05-11", "window": { "start": { "local": "1983-05-11T23:46:07+08:00", "utc": "1983-05-11T15:46:07Z", "ms": 421515966825.1221 }, "end": { "local": "1983-05-12T00:34:07+08:00", "utc": "1983-05-11T16:34:07Z", "ms": 421518846825.1221 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 05:48 on Wed 11 May to 04:52 on Thu 12 May.", "fact": "1983-05-10T21:47:45Z → 1983-05-11T20:52:05Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:46–00:34 on the 10th, 23:46–00:34 on the 11th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15479 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Wednesday 11 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": "1983-05-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-11", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Wednesday 11 May. Caturdaśī runs from 05:48 on Wed 11 May to 04:52 on Thu 12 May and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-05-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/akshaya-tritiya", "festival": "akshaya-tritiya", "name": "Akṣaya Tṛtīyā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21292, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-05-14T23:23:11+08:00", "utc": "1983-05-14T15:23:11Z", "ms": 421773791374.9548 }, "end": { "local": "1983-05-15T21:01:28+08:00", "utc": "1983-05-15T13:01:28Z", "ms": 421851687785.252 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-14T23:23:11+08:00", "utc": "1983-05-14T15:23:11Z", "ms": 421773791374.9548 }, "end": { "local": "1983-05-15T21:01:28+08:00", "utc": "1983-05-15T13:01:28Z", "ms": 421851687785.252 } }, "kaala": "purvahna", "days": [ { "local_date": "1983-05-15", "window": { "start": { "local": "1983-05-15T05:18:04+08:00", "utc": "1983-05-14T21:18:04Z", "ms": 421795083583.1979 }, "end": { "local": "1983-05-15T09:52:58+08:00", "utc": "1983-05-15T01:52:58Z", "ms": 421811578205.126 } }, "covered_min": 275, "window_min": 275, "qualifies": true }, { "local_date": "1983-05-16", "window": { "start": { "local": "1983-05-16T05:17:23+08:00", "utc": "1983-05-15T21:17:23Z", "ms": 421881443147.6355 }, "end": { "local": "1983-05-16T09:52:45+08:00", "utc": "1983-05-16T01:52:45Z", "ms": 421897964973.42413 } }, "covered_min": 0, "window_min": 275, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 23:23 on Sat 14 May to 21:01 on Sun 15 May.", "fact": "1983-05-14T15:23:11Z → 1983-05-15T13:01:28Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 05:18–09:53 on the 15th, 05:17–09:53 on the 16th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pūrvāhṇa. It covers 275 of 275 minutes on the 15th and 0 of 275 on the 16th.", "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 21292 s" }, { "step": "ruling", "text": "Akṣaya Tṛtīyā, Lu’an, 1983: Sunday 15 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": "1983-05-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-15", "confidence": "determinate" } ], "quote": "In Lu’an, Akṣaya Tṛtīyā 1983 falls on Sunday 15 May. Tṛtīyā runs from 23:23 on Sat 14 May to 21:01 on Sun 15 May and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/parashurama-jayanti", "festival": "parashurama-jayanti", "name": "Paraśurāma Jayantī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2204, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-05-14T23:23:11+08:00", "utc": "1983-05-14T15:23:11Z", "ms": 421773791374.9548 }, "end": { "local": "1983-05-15T21:01:28+08:00", "utc": "1983-05-15T13:01:28Z", "ms": 421851687785.252 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-14T23:23:11+08:00", "utc": "1983-05-14T15:23:11Z", "ms": 421773791374.9548 }, "end": { "local": "1983-05-15T21:01:28+08:00", "utc": "1983-05-15T13:01:28Z", "ms": 421851687785.252 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-05-14", "window": { "start": { "local": "1983-05-14T19:02:06+08:00", "utc": "1983-05-14T11:02:06Z", "ms": 421758126067.9144 }, "end": { "local": "1983-05-14T20:24:14+08:00", "utc": "1983-05-14T12:24:14Z", "ms": 421763053736.6189 } }, "covered_min": 0, "window_min": 82, "qualifies": false }, { "local_date": "1983-05-15", "window": { "start": { "local": "1983-05-15T19:02:47+08:00", "utc": "1983-05-15T11:02:47Z", "ms": 421844567448.98224 }, "end": { "local": "1983-05-15T20:24:44+08:00", "utc": "1983-05-15T12:24:44Z", "ms": 421849484208.8027 } }, "covered_min": 82, "window_min": 82, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 23:23 on Sat 14 May to 21:01 on Sun 15 May.", "fact": "1983-05-14T15:23:11Z → 1983-05-15T13:01:28Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:02–20:24 on the 14th, 19:03–20:25 on the 15th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pradoṣa. It covers 0 of 82 minutes on the 14th and 82 of 82 on the 15th.", "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 2204 s" }, { "step": "ruling", "text": "Paraśurāma Jayantī, Lu’an, 1983: Sunday 15 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": "1983-05-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-15", "confidence": "boundary" } ], "quote": "In Lu’an, Paraśurāma Jayantī 1983 falls on Sunday 15 May. Tṛtīyā runs from 23:23 on Sat 14 May to 21:01 on Sun 15 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-05-16", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21566, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-05-15T21:01:28+08:00", "utc": "1983-05-15T13:01:28Z", "ms": 421851687785.252 }, "end": { "local": "1983-05-16T18:33:52+08:00", "utc": "1983-05-16T10:33:52Z", "ms": 421929231954.7927 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-15T21:01:28+08:00", "utc": "1983-05-15T13:01:28Z", "ms": 421851687785.252 }, "end": { "local": "1983-05-16T18:33:52+08:00", "utc": "1983-05-16T10:33:52Z", "ms": 421929231954.7927 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-05-15", "window": { "start": { "local": "1983-05-15T11:46:26+08:00", "utc": "1983-05-15T03:46:26Z", "ms": 421818385516.0901 }, "end": { "local": "1983-05-15T12:34:26+08:00", "utc": "1983-05-15T04:34:26Z", "ms": 421821265516.0901 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-05-16", "window": { "start": { "local": "1983-05-16T11:46:26+08:00", "utc": "1983-05-16T03:46:26Z", "ms": 421904785886.3185 }, "end": { "local": "1983-05-16T12:34:26+08:00", "utc": "1983-05-16T04:34:26Z", "ms": 421907665886.3185 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:01 on Sun 15 May to 18:34 on Mon 16 May.", "fact": "1983-05-15T13:01:28Z → 1983-05-16T10:33:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 15th, 11:46–12:34 on the 16th.", "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 15th and 48 of 48 on the 16th.", "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 21566 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Monday 16 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": "1983-05-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-16", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Monday 16 May. Caturthī runs from 21:01 on Sun 15 May to 18:34 on Mon 16 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-05-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shankara-jayanti", "festival": "shankara-jayanti", "name": "Śaṅkara Jayantī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12660, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1983-05-16T18:33:52+08:00", "utc": "1983-05-16T10:33:52Z", "ms": 421929231954.7927 }, "end": { "local": "1983-05-17T16:05:27+08:00", "utc": "1983-05-17T08:05:27Z", "ms": 422006727020.2513 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-16T18:33:52+08:00", "utc": "1983-05-16T10:33:52Z", "ms": 421929231954.7927 }, "end": { "local": "1983-05-17T16:05:27+08:00", "utc": "1983-05-17T08:05:27Z", "ms": 422006727020.2513 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-05-16", "window": { "start": { "local": "1983-05-16T11:46:26+08:00", "utc": "1983-05-16T03:46:26Z", "ms": 421904785886.3185 }, "end": { "local": "1983-05-16T12:34:26+08:00", "utc": "1983-05-16T04:34:26Z", "ms": 421907665886.3185 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-05-17", "window": { "start": { "local": "1983-05-17T11:46:27+08:00", "utc": "1983-05-17T03:46:27Z", "ms": 421991186799.98517 }, "end": { "local": "1983-05-17T12:34:27+08:00", "utc": "1983-05-17T04:34:27Z", "ms": 421994066799.98517 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 18:34 on Mon 16 May to 16:05 on Tue 17 May.", "fact": "1983-05-16T10:33:52Z → 1983-05-17T08:05:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 16th, 11:46–12:34 on the 17th.", "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 16th and 48 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 12660 s" }, { "step": "ruling", "text": "Śaṅkara Jayantī, Lu’an, 1983: Tuesday 17 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": "1983-05-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-17", "confidence": "determinate" } ], "quote": "In Lu’an, Śaṅkara Jayantī 1983 falls on Tuesday 17 May. Pañcamī runs from 18:34 on Mon 16 May to 16:05 on Tue 17 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/gangotpatti", "festival": "gangotpatti", "name": "Gaṅgotpatti", "everyday": "Ganga Saptami", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1444, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1983-05-18T13:40:28+08:00", "utc": "1983-05-18T05:40:28Z", "ms": 422084427708.25476 }, "end": { "local": "1983-05-19T11:22:26+08:00", "utc": "1983-05-19T03:22:26Z", "ms": 422162545795.559 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-18T13:40:28+08:00", "utc": "1983-05-18T05:40:28Z", "ms": 422084427708.25476 }, "end": { "local": "1983-05-19T11:22:26+08:00", "utc": "1983-05-19T03:22:26Z", "ms": 422162545795.559 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-05-18", "window": { "start": { "local": "1983-05-18T11:46:28+08:00", "utc": "1983-05-18T03:46:28Z", "ms": 422077588249.8634 }, "end": { "local": "1983-05-18T12:34:28+08:00", "utc": "1983-05-18T04:34:28Z", "ms": 422080468249.8634 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-05-19", "window": { "start": { "local": "1983-05-19T11:46:30+08:00", "utc": "1983-05-19T03:46:30Z", "ms": 422163990229.1893 }, "end": { "local": "1983-05-19T12:34:30+08:00", "utc": "1983-05-19T04:34:30Z", "ms": 422166870229.1893 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 13:40 on Wed 18 May to 11:22 on Thu 19 May.", "fact": "1983-05-18T05:40:28Z → 1983-05-19T03:22:26Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 18th, 11:47–12:35 on the 19th.", "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 18th and 0 of 48 on the 19th.", "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 1444 s" }, { "step": "ruling", "text": "Gaṅgotpatti, Lu’an, 1983: Thursday 19 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": "1983-05-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-19", "confidence": "determinate" } ], "quote": "In Lu’an, Gaṅgotpatti (Ganga Saptami) 1983 falls on Thursday 19 May. Saptamī runs from 13:40 on Wed 18 May to 11:22 on Thu 19 May, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-05-22", "festival": "ekadashi", "name": "Mohinī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1496, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-05-22T05:38:45+08:00", "utc": "1983-05-21T21:38:45Z", "ms": 422401124546.37244 }, "end": { "local": "1983-05-23T04:16:35+08:00", "utc": "1983-05-22T20:16:35Z", "ms": 422482595154.3277 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-22T05:38:45+08:00", "utc": "1983-05-21T21:38:45Z", "ms": 422401124546.37244 }, "end": { "local": "1983-05-23T04:16:35+08:00", "utc": "1983-05-22T20:16:35Z", "ms": 422482595154.3277 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-05-22", "window": { "start": { "local": "1983-05-22T05:13:49+08:00", "utc": "1983-05-21T21:13:49Z", "ms": 422399628793.5329 }, "end": { "local": "1983-05-22T05:13:49+08:00", "utc": "1983-05-21T21:13:49Z", "ms": 422399628793.5329 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-05-23", "window": { "start": { "local": "1983-05-23T05:13:18+08:00", "utc": "1983-05-22T21:13:18Z", "ms": 422485997916.0375 }, "end": { "local": "1983-05-23T05:13:18+08:00", "utc": "1983-05-22T21:13:18Z", "ms": 422485997916.0375 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 05:39 on Sun 22 May to 04:17 on Mon 23 May.", "fact": "1983-05-21T21:38:45Z → 1983-05-22T20:16:35Z" }, { "step": "kaala", "text": "Sunrise is at 05:14 on the 22nd and 05:13 on the 23rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 22nd and is not on the 23rd.", "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 1496 s" }, { "step": "ruling", "text": "Mohinī Ekādaśī, Lu’an, 1983: Sunday 22 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": "1983-05-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-22", "confidence": "determinate" } ], "quote": "In Lu’an, Mohinī Ekādaśī 1983 falls on Sunday 22 May. Ekādaśī runs from 05:39 on Sun 22 May to 04:17 on Mon 23 May, and is current at sunrise on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-05-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/parashurama-dvadashi", "festival": "parashurama-dvadashi", "name": "Paraśurāma Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27008, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1983-05-23T04:16:35+08:00", "utc": "1983-05-22T20:16:35Z", "ms": 422482595154.3277 }, "end": { "local": "1983-05-24T03:15:23+08:00", "utc": "1983-05-23T19:15:23Z", "ms": 422565323357.62915 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-23T04:16:35+08:00", "utc": "1983-05-22T20:16:35Z", "ms": 422482595154.3277 }, "end": { "local": "1983-05-24T03:15:23+08:00", "utc": "1983-05-23T19:15:23Z", "ms": 422565323357.62915 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-05-23", "window": { "start": { "local": "1983-05-23T11:46:43+08:00", "utc": "1983-05-23T03:46:43Z", "ms": 422509603323.1168 }, "end": { "local": "1983-05-23T12:34:43+08:00", "utc": "1983-05-23T04:34:43Z", "ms": 422512483323.1168 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-05-24", "window": { "start": { "local": "1983-05-24T11:46:48+08:00", "utc": "1983-05-24T03:46:48Z", "ms": 422596007863.8485 }, "end": { "local": "1983-05-24T12:34:48+08:00", "utc": "1983-05-24T04:34:48Z", "ms": 422598887863.8485 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 04:17 on Mon 23 May to 03:15 on Tue 24 May.", "fact": "1983-05-22T20:16:35Z → 1983-05-23T19:15:23Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 23rd, 11:47–12:35 on the 24th.", "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 23rd and 0 of 48 on the 24th.", "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 27008 s" }, { "step": "ruling", "text": "Paraśurāma Dvādaśī, Lu’an, 1983: Monday 23 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": "1983-05-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-23", "confidence": "determinate" } ], "quote": "In Lu’an, Paraśurāma Dvādaśī 1983 falls on Monday 23 May. Dvādaśī runs from 04:17 on Mon 23 May to 03:15 on Tue 24 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/rukmini-dvadashi", "festival": "rukmini-dvadashi", "name": "Rukmiṇī Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27008, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1983-05-23T04:16:35+08:00", "utc": "1983-05-22T20:16:35Z", "ms": 422482595154.3277 }, "end": { "local": "1983-05-24T03:15:23+08:00", "utc": "1983-05-23T19:15:23Z", "ms": 422565323357.62915 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-23T04:16:35+08:00", "utc": "1983-05-22T20:16:35Z", "ms": 422482595154.3277 }, "end": { "local": "1983-05-24T03:15:23+08:00", "utc": "1983-05-23T19:15:23Z", "ms": 422565323357.62915 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-05-23", "window": { "start": { "local": "1983-05-23T11:46:43+08:00", "utc": "1983-05-23T03:46:43Z", "ms": 422509603323.1168 }, "end": { "local": "1983-05-23T12:34:43+08:00", "utc": "1983-05-23T04:34:43Z", "ms": 422512483323.1168 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-05-24", "window": { "start": { "local": "1983-05-24T11:46:48+08:00", "utc": "1983-05-24T03:46:48Z", "ms": 422596007863.8485 }, "end": { "local": "1983-05-24T12:34:48+08:00", "utc": "1983-05-24T04:34:48Z", "ms": 422598887863.8485 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 04:17 on Mon 23 May to 03:15 on Tue 24 May.", "fact": "1983-05-22T20:16:35Z → 1983-05-23T19:15:23Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 23rd, 11:47–12:35 on the 24th.", "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 23rd and 0 of 48 on the 24th.", "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 27008 s" }, { "step": "ruling", "text": "Rukmiṇī Dvādaśī, Lu’an, 1983: Monday 23 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": "1983-05-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-23", "confidence": "determinate" } ], "quote": "In Lu’an, Rukmiṇī Dvādaśī 1983 falls on Monday 23 May. Dvādaśī runs from 04:17 on Mon 23 May to 03:15 on Tue 24 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/pradosha-vrata?on=1983-05-24", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22139, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-05-24T03:15:23+08:00", "utc": "1983-05-23T19:15:23Z", "ms": 422565323357.62915 }, "end": { "local": "1983-05-25T02:38:15+08:00", "utc": "1983-05-24T18:38:15Z", "ms": 422649494721.8152 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-24T03:15:23+08:00", "utc": "1983-05-23T19:15:23Z", "ms": 422565323357.62915 }, "end": { "local": "1983-05-25T02:38:15+08:00", "utc": "1983-05-24T18:38:15Z", "ms": 422649494721.8152 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-05-23", "window": { "start": { "local": "1983-05-23T19:08:09+08:00", "utc": "1983-05-23T11:08:09Z", "ms": 422536088730.1961 }, "end": { "local": "1983-05-23T20:28:46+08:00", "utc": "1983-05-23T12:28:46Z", "ms": 422540926027.794 } }, "covered_min": 0, "window_min": 81, "qualifies": false }, { "local_date": "1983-05-24", "window": { "start": { "local": "1983-05-24T19:08:47+08:00", "utc": "1983-05-24T11:08:47Z", "ms": 422622527265.5165 }, "end": { "local": "1983-05-24T20:29:16+08:00", "utc": "1983-05-24T12:29:16Z", "ms": 422627355689.40967 } }, "covered_min": 80, "window_min": 80, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 03:15 on Tue 24 May to 02:38 on Wed 25 May.", "fact": "1983-05-23T19:15:23Z → 1983-05-24T18:38:15Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:08–20:29 on the 23rd, 19:09–20:29 on the 24th.", "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 81 minutes on the 23rd and 80 of 80 on the 24th.", "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 22139 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Tuesday 24 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": "1983-05-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-24", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Tuesday 24 May. Trayodaśī runs from 03:15 on Tue 24 May to 02:38 on Wed 25 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-05-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/nrisimha-chaturdashi", "festival": "nrisimha-chaturdashi", "name": "Nṛsiṃha Caturdaśī", "everyday": "Narasimha Jayanti", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21505, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-05-25T02:38:15+08:00", "utc": "1983-05-24T18:38:15Z", "ms": 422649494721.8152 }, "end": { "local": "1983-05-26T02:28:10+08:00", "utc": "1983-05-25T18:28:10Z", "ms": 422735289961.7467 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-25T02:38:15+08:00", "utc": "1983-05-24T18:38:15Z", "ms": 422649494721.8152 }, "end": { "local": "1983-05-26T02:28:10+08:00", "utc": "1983-05-25T18:28:10Z", "ms": 422735289961.7467 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-05-24", "window": { "start": { "local": "1983-05-24T19:08:47+08:00", "utc": "1983-05-24T11:08:47Z", "ms": 422622527265.5165 }, "end": { "local": "1983-05-24T20:29:16+08:00", "utc": "1983-05-24T12:29:16Z", "ms": 422627355689.40967 } }, "covered_min": 0, "window_min": 80, "qualifies": false }, { "local_date": "1983-05-25", "window": { "start": { "local": "1983-05-25T19:09:25+08:00", "utc": "1983-05-25T11:09:25Z", "ms": 422708965354.6809 }, "end": { "local": "1983-05-25T20:29:45+08:00", "utc": "1983-05-25T12:29:45Z", "ms": 422713785157.67145 } }, "covered_min": 80, "window_min": 80, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 02:38 on Wed 25 May to 02:28 on Thu 26 May.", "fact": "1983-05-24T18:38:15Z → 1983-05-25T18:28:10Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:09–20:29 on the 24th, 19:09–20:30 on the 25th.", "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 80 minutes on the 24th and 80 of 80 on the 25th.", "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 21505 s" }, { "step": "ruling", "text": "Nṛsiṃha Caturdaśī, Lu’an, 1983: Wednesday 25 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": "1983-05-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-25", "confidence": "determinate" } ], "quote": "In Lu’an, Nṛsiṃha Caturdaśī (Narasimha Jayanti) 1983 falls on Wednesday 25 May. Caturdaśī runs from 02:38 on Wed 25 May to 02:28 on Thu 26 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/buddha-purnima", "festival": "buddha-purnima", "name": "Buddha Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32364, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-05-26T02:28:10+08:00", "utc": "1983-05-25T18:28:10Z", "ms": 422735289961.7467 }, "end": { "local": "1983-05-27T02:47:41+08:00", "utc": "1983-05-26T18:47:41Z", "ms": 422822860595.19293 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-26T02:28:10+08:00", "utc": "1983-05-25T18:28:10Z", "ms": 422735289961.7467 }, "end": { "local": "1983-05-27T02:47:41+08:00", "utc": "1983-05-26T18:47:41Z", "ms": 422822860595.19293 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-05-26", "window": { "start": { "local": "1983-05-26T11:46:58+08:00", "utc": "1983-05-26T03:46:58Z", "ms": 422768818425.0112 }, "end": { "local": "1983-05-26T12:34:58+08:00", "utc": "1983-05-26T04:34:58Z", "ms": 422771698425.0112 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-05-27", "window": { "start": { "local": "1983-05-27T11:47:04+08:00", "utc": "1983-05-27T03:47:04Z", "ms": 422855224432.34644 }, "end": { "local": "1983-05-27T12:35:04+08:00", "utc": "1983-05-27T04:35:04Z", "ms": 422858104432.34644 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:28 on Thu 26 May to 02:48 on Fri 27 May.", "fact": "1983-05-25T18:28:10Z → 1983-05-26T18:47:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 26th, 11:47–12:35 on the 27th.", "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 26th and 0 of 48 on the 27th.", "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 32364 s" }, { "step": "ruling", "text": "Buddha Pūrṇimā, Lu’an, 1983: Thursday 26 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": "1983-05-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-26", "confidence": "determinate" } ], "quote": "In Lu’an, Buddha Pūrṇimā 1983 falls on Thursday 26 May. Pūrṇimā runs from 02:28 on Thu 26 May to 02:48 on Fri 27 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sampat-gauri-vrata", "festival": "sampat-gauri-vrata", "name": "Sampat Gaurī Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32364, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-05-26T02:28:10+08:00", "utc": "1983-05-25T18:28:10Z", "ms": 422735289961.7467 }, "end": { "local": "1983-05-27T02:47:41+08:00", "utc": "1983-05-26T18:47:41Z", "ms": 422822860595.19293 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-26T02:28:10+08:00", "utc": "1983-05-25T18:28:10Z", "ms": 422735289961.7467 }, "end": { "local": "1983-05-27T02:47:41+08:00", "utc": "1983-05-26T18:47:41Z", "ms": 422822860595.19293 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-05-26", "window": { "start": { "local": "1983-05-26T11:46:58+08:00", "utc": "1983-05-26T03:46:58Z", "ms": 422768818425.0112 }, "end": { "local": "1983-05-26T12:34:58+08:00", "utc": "1983-05-26T04:34:58Z", "ms": 422771698425.0112 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-05-27", "window": { "start": { "local": "1983-05-27T11:47:04+08:00", "utc": "1983-05-27T03:47:04Z", "ms": 422855224432.34644 }, "end": { "local": "1983-05-27T12:35:04+08:00", "utc": "1983-05-27T04:35:04Z", "ms": 422858104432.34644 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:28 on Thu 26 May to 02:48 on Fri 27 May.", "fact": "1983-05-25T18:28:10Z → 1983-05-26T18:47:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 26th, 11:47–12:35 on the 27th.", "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 26th and 0 of 48 on the 27th.", "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 32364 s" }, { "step": "ruling", "text": "Sampat Gaurī Vrata, Lu’an, 1983: Thursday 26 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": "1983-05-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-26", "confidence": "determinate" } ], "quote": "In Lu’an, Sampat Gaurī Vrata 1983 falls on Thursday 26 May. Pūrṇimā runs from 02:28 on Thu 26 May to 02:48 on Fri 27 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-05-30", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-05-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33151, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-05-30T06:48:54+08:00", "utc": "1983-05-29T22:48:54Z", "ms": 423096533854.10333 }, "end": { "local": "1983-05-31T09:00:28+08:00", "utc": "1983-05-31T01:00:28Z", "ms": 423190827766.83655 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-05-30T06:48:54+08:00", "utc": "1983-05-29T22:48:54Z", "ms": 423096533854.10333 }, "end": { "local": "1983-05-31T09:00:28+08:00", "utc": "1983-05-31T01:00:28Z", "ms": 423190827766.83655 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-05-29", "window": { "start": { "local": "1983-05-29T21:36:23+08:00", "utc": "1983-05-29T13:36:23Z", "ms": 423063382646.0888 }, "end": { "local": "1983-05-29T21:36:23+08:00", "utc": "1983-05-29T13:36:23Z", "ms": 423063382646.0888 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-05-30", "window": { "start": { "local": "1983-05-30T22:25:41+08:00", "utc": "1983-05-30T14:25:41Z", "ms": 423152741357.3243 }, "end": { "local": "1983-05-30T22:25:41+08:00", "utc": "1983-05-30T14:25:41Z", "ms": 423152741357.3243 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 06:49 on Mon 30 May to 09:00 on Tue 31 May.", "fact": "1983-05-29T22:48:54Z → 1983-05-31T01:00:28Z" }, { "step": "kaala", "text": "Moonrise is at 21:36 on the 29th and 22:26 on the 30th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 29th and is on the 30th.", "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 33151 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Monday 30 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": "1983-05-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-05-30", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Monday 30 May. Caturthī runs from 06:49 on Mon 30 May to 09:00 on Tue 31 May and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-05-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-06-07", "festival": "ekadashi", "name": "Aparā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33275, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-06-06T19:53:56+08:00", "utc": "1983-06-06T11:53:56Z", "ms": 423748436137.4776 }, "end": { "local": "1983-06-07T19:45:46+08:00", "utc": "1983-06-07T11:45:46Z", "ms": 423834346463.79596 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-06T19:53:56+08:00", "utc": "1983-06-06T11:53:56Z", "ms": 423748436137.4776 }, "end": { "local": "1983-06-07T19:45:46+08:00", "utc": "1983-06-07T11:45:46Z", "ms": 423834346463.79596 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-06-07", "window": { "start": { "local": "1983-06-07T05:08:31+08:00", "utc": "1983-06-06T21:08:31Z", "ms": 423781711169.8816 }, "end": { "local": "1983-06-07T05:08:31+08:00", "utc": "1983-06-06T21:08:31Z", "ms": 423781711169.8816 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-06-08", "window": { "start": { "local": "1983-06-08T05:08:24+08:00", "utc": "1983-06-07T21:08:24Z", "ms": 423868104052.26935 }, "end": { "local": "1983-06-08T05:08:24+08:00", "utc": "1983-06-07T21:08:24Z", "ms": 423868104052.26935 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 19:54 on Mon 6 Jun to 19:46 on Tue 7 Jun.", "fact": "1983-06-06T11:53:56Z → 1983-06-07T11:45:46Z" }, { "step": "kaala", "text": "Sunrise is at 05:09 on the 7th and 05:08 on the 8th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 7th and is not on the 8th.", "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 33275 s" }, { "step": "ruling", "text": "Aparā Ekādaśī, Lu’an, 1983: Tuesday 7 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": "1983-06-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-07", "confidence": "determinate" } ], "quote": "In Lu’an, Aparā Ekādaśī 1983 falls on Tuesday 7 June. Ekādaśī runs from 19:54 on Mon 6 Jun to 19:46 on Tue 7 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-06-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-06-08", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1428, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-06-08T18:53:28+08:00", "utc": "1983-06-08T10:53:28Z", "ms": 423917608192.5978 }, "end": { "local": "1983-06-09T17:20:34+08:00", "utc": "1983-06-09T09:20:34Z", "ms": 423998433725.9235 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-08T18:53:28+08:00", "utc": "1983-06-08T10:53:28Z", "ms": 423917608192.5978 }, "end": { "local": "1983-06-09T17:20:34+08:00", "utc": "1983-06-09T09:20:34Z", "ms": 423998433725.9235 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-06-08", "window": { "start": { "local": "1983-06-08T19:17:16+08:00", "utc": "1983-06-08T11:17:16Z", "ms": 423919036126.901 }, "end": { "local": "1983-06-08T20:36:04+08:00", "utc": "1983-06-08T12:36:04Z", "ms": 423923764433.26855 } }, "covered_min": 79, "window_min": 79, "qualifies": true }, { "local_date": "1983-06-09", "window": { "start": { "local": "1983-06-09T19:17:44+08:00", "utc": "1983-06-09T11:17:44Z", "ms": 424005464035.6343 }, "end": { "local": "1983-06-09T20:36:28+08:00", "utc": "1983-06-09T12:36:28Z", "ms": 424010188067.715 } }, "covered_min": 0, "window_min": 79, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 18:53 on Wed 8 Jun to 17:21 on Thu 9 Jun.", "fact": "1983-06-08T10:53:28Z → 1983-06-09T09:20:34Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:17–20:36 on the 8th, 19:18–20:36 on the 9th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 79 of 79 minutes on the 8th and 0 of 79 on the 9th.", "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 1428 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Wednesday 8 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": "1983-06-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-08", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Wednesday 8 June. Trayodaśī runs from 18:53 on Wed 8 Jun to 17:21 on Thu 9 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-06-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-06-09", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23305, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-06-09T17:20:34+08:00", "utc": "1983-06-09T09:20:34Z", "ms": 423998433725.9235 }, "end": { "local": "1983-06-10T15:12:50+08:00", "utc": "1983-06-10T07:12:50Z", "ms": 424077170175.9432 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-09T17:20:34+08:00", "utc": "1983-06-09T09:20:34Z", "ms": 423998433725.9235 }, "end": { "local": "1983-06-10T15:12:50+08:00", "utc": "1983-06-10T07:12:50Z", "ms": 424077170175.9432 } }, "kaala": "nishita", "days": [ { "local_date": "1983-06-09", "window": { "start": { "local": "1983-06-09T23:48:59+08:00", "utc": "1983-06-09T15:48:59Z", "ms": 424021739155.937 }, "end": { "local": "1983-06-10T00:36:59+08:00", "utc": "1983-06-09T16:36:59Z", "ms": 424024619155.937 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-06-10", "window": { "start": { "local": "1983-06-10T23:49:11+08:00", "utc": "1983-06-10T15:49:11Z", "ms": 424108151296.3096 }, "end": { "local": "1983-06-11T00:37:11+08:00", "utc": "1983-06-10T16:37:11Z", "ms": 424111031296.3096 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 17:21 on Thu 9 Jun to 15:13 on Fri 10 Jun.", "fact": "1983-06-09T09:20:34Z → 1983-06-10T07:12:50Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:49–00:37 on the 9th, 23:49–00:37 on the 10th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 23305 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Thursday 9 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": "1983-06-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-09", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Thursday 9 June. Caturdaśī runs from 17:21 on Thu 9 Jun to 15:13 on Fri 10 Jun and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-06-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/rambha-tritiya", "festival": "rambha-tritiya", "name": "Rambhā Tṛtīyā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18803, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-06-13T06:36:25+08:00", "utc": "1983-06-12T22:36:25Z", "ms": 424305385008.64374 }, "end": { "local": "1983-06-14T03:27:04+08:00", "utc": "1983-06-13T19:27:04Z", "ms": 424380423900.0072 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-13T06:36:25+08:00", "utc": "1983-06-12T22:36:25Z", "ms": 424305385008.64374 }, "end": { "local": "1983-06-14T03:27:04+08:00", "utc": "1983-06-13T19:27:04Z", "ms": 424380423900.0072 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-06-13", "window": { "start": { "local": "1983-06-13T11:49:48+08:00", "utc": "1983-06-13T03:49:48Z", "ms": 424324188201.4761 }, "end": { "local": "1983-06-13T12:37:48+08:00", "utc": "1983-06-13T04:37:48Z", "ms": 424327068201.4761 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-06-14", "window": { "start": { "local": "1983-06-14T11:50:00+08:00", "utc": "1983-06-14T03:50:00Z", "ms": 424410600412.271 }, "end": { "local": "1983-06-14T12:38:00+08:00", "utc": "1983-06-14T04:38:00Z", "ms": 424413480412.271 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 06:36 on Mon 13 Jun to 03:27 on Tue 14 Jun.", "fact": "1983-06-12T22:36:25Z → 1983-06-13T19:27:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 13th, 11:50–12:38 on the 14th.", "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 13th and 0 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 18803 s" }, { "step": "ruling", "text": "Rambhā Tṛtīyā, Lu’an, 1983: Monday 13 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": "1983-06-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-13", "confidence": "determinate" } ], "quote": "In Lu’an, Rambhā Tṛtīyā 1983 falls on Monday 13 June. Tṛtīyā runs from 06:36 on Mon 13 Jun to 03:27 on Tue 14 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-06-14", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30177, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-06-14T03:27:04+08:00", "utc": "1983-06-13T19:27:04Z", "ms": 424380423900.0072 }, "end": { "local": "1983-06-15T00:22:19+08:00", "utc": "1983-06-14T16:22:19Z", "ms": 424455739130.4157 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-14T03:27:04+08:00", "utc": "1983-06-13T19:27:04Z", "ms": 424380423900.0072 }, "end": { "local": "1983-06-15T00:22:19+08:00", "utc": "1983-06-14T16:22:19Z", "ms": 424455739130.4157 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-06-14", "window": { "start": { "local": "1983-06-14T11:50:00+08:00", "utc": "1983-06-14T03:50:00Z", "ms": 424410600412.271 }, "end": { "local": "1983-06-14T12:38:00+08:00", "utc": "1983-06-14T04:38:00Z", "ms": 424413480412.271 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-06-15", "window": { "start": { "local": "1983-06-15T11:50:13+08:00", "utc": "1983-06-15T03:50:13Z", "ms": 424497012755.54486 }, "end": { "local": "1983-06-15T12:38:13+08:00", "utc": "1983-06-15T04:38:13Z", "ms": 424499892755.54486 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 03:27 on Tue 14 Jun to 00:22 on Wed 15 Jun.", "fact": "1983-06-13T19:27:04Z → 1983-06-14T16:22:19Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 14th, 11:50–12:38 on the 15th.", "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 14th and 0 of 48 on the 15th.", "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 30177 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Tuesday 14 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": "1983-06-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-14", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Tuesday 14 June. Caturthī runs from 03:27 on Tue 14 Jun to 00:22 on Wed 15 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-06-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/aranya-gauri-vrata", "festival": "aranya-gauri-vrata", "name": "Araṇya Gaurī Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22542, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-06-15T21:29:16+08:00", "utc": "1983-06-15T13:29:16Z", "ms": 424531756126.87805 }, "end": { "local": "1983-06-16T18:54:07+08:00", "utc": "1983-06-16T10:54:07Z", "ms": 424608847170.43134 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-15T21:29:16+08:00", "utc": "1983-06-15T13:29:16Z", "ms": 424531756126.87805 }, "end": { "local": "1983-06-16T18:54:07+08:00", "utc": "1983-06-16T10:54:07Z", "ms": 424608847170.43134 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-06-15", "window": { "start": { "local": "1983-06-15T11:50:13+08:00", "utc": "1983-06-15T03:50:13Z", "ms": 424497012755.54486 }, "end": { "local": "1983-06-15T12:38:13+08:00", "utc": "1983-06-15T04:38:13Z", "ms": 424499892755.54486 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-06-16", "window": { "start": { "local": "1983-06-16T11:50:25+08:00", "utc": "1983-06-16T03:50:25Z", "ms": 424583425205.1852 }, "end": { "local": "1983-06-16T12:38:25+08:00", "utc": "1983-06-16T04:38:25Z", "ms": 424586305205.1852 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 21:29 on Wed 15 Jun to 18:54 on Thu 16 Jun.", "fact": "1983-06-15T13:29:16Z → 1983-06-16T10:54:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 15th, 11:50–12:38 on the 16th.", "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 15th and 48 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 22542 s" }, { "step": "ruling", "text": "Araṇya Gaurī Vrata, Lu’an, 1983: Thursday 16 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": "1983-06-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-16", "confidence": "determinate" } ], "quote": "In Lu’an, Araṇya Gaurī Vrata 1983 falls on Thursday 16 June. Ṣaṣṭhī runs from 21:29 on Wed 15 Jun to 18:54 on Thu 16 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/skanda-shashthi-jyaishtha", "festival": "skanda-shashthi-jyaishtha", "name": "Skanda Ṣaṣṭhī (Jyaiṣṭha)", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22542, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-06-15T21:29:16+08:00", "utc": "1983-06-15T13:29:16Z", "ms": 424531756126.87805 }, "end": { "local": "1983-06-16T18:54:07+08:00", "utc": "1983-06-16T10:54:07Z", "ms": 424608847170.43134 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-15T21:29:16+08:00", "utc": "1983-06-15T13:29:16Z", "ms": 424531756126.87805 }, "end": { "local": "1983-06-16T18:54:07+08:00", "utc": "1983-06-16T10:54:07Z", "ms": 424608847170.43134 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-06-15", "window": { "start": { "local": "1983-06-15T11:50:13+08:00", "utc": "1983-06-15T03:50:13Z", "ms": 424497012755.54486 }, "end": { "local": "1983-06-15T12:38:13+08:00", "utc": "1983-06-15T04:38:13Z", "ms": 424499892755.54486 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-06-16", "window": { "start": { "local": "1983-06-16T11:50:25+08:00", "utc": "1983-06-16T03:50:25Z", "ms": 424583425205.1852 }, "end": { "local": "1983-06-16T12:38:25+08:00", "utc": "1983-06-16T04:38:25Z", "ms": 424586305205.1852 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 21:29 on Wed 15 Jun to 18:54 on Thu 16 Jun.", "fact": "1983-06-15T13:29:16Z → 1983-06-16T10:54:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:50–12:38 on the 15th, 11:50–12:38 on the 16th.", "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 15th and 48 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: purvaviddha → only-day · margin 22542 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī (Jyaiṣṭha), Lu’an, 1983: Thursday 16 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": "1983-06-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-16", "confidence": "determinate" } ], "quote": "In Lu’an, Skanda Ṣaṣṭhī (Jyaiṣṭha) 1983 falls on Thursday 16 June. Ṣaṣṭhī runs from 21:29 on Wed 15 Jun to 18:54 on Thu 16 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-06-21", "festival": "ekadashi", "name": "Nirjalā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27188, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-06-20T12:56:07+08:00", "utc": "1983-06-20T04:56:07Z", "ms": 424932966741.8682 }, "end": { "local": "1983-06-21T12:42:10+08:00", "utc": "1983-06-21T04:42:10Z", "ms": 425018529781.9083 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-20T12:56:07+08:00", "utc": "1983-06-20T04:56:07Z", "ms": 424932966741.8682 }, "end": { "local": "1983-06-21T12:42:10+08:00", "utc": "1983-06-21T04:42:10Z", "ms": 425018529781.9083 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-06-20", "window": { "start": { "local": "1983-06-20T05:08:51+08:00", "utc": "1983-06-19T21:08:51Z", "ms": 424904930547.46234 }, "end": { "local": "1983-06-20T05:08:51+08:00", "utc": "1983-06-19T21:08:51Z", "ms": 424904930547.46234 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-06-21", "window": { "start": { "local": "1983-06-21T05:09:02+08:00", "utc": "1983-06-20T21:09:02Z", "ms": 424991341541.7913 }, "end": { "local": "1983-06-21T05:09:02+08:00", "utc": "1983-06-20T21:09:02Z", "ms": 424991341541.7913 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 12:56 on Mon 20 Jun to 12:42 on Tue 21 Jun.", "fact": "1983-06-20T04:56:07Z → 1983-06-21T04:42:10Z" }, { "step": "kaala", "text": "Sunrise is at 05:09 on the 20th and 05:09 on the 21st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 20th and is on the 21st.", "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 27188 s" }, { "step": "ruling", "text": "Nirjalā Ekādaśī, Lu’an, 1983: Tuesday 21 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": "1983-06-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-21", "confidence": "determinate" } ], "quote": "In Lu’an, Nirjalā Ekādaśī 1983 falls on Tuesday 21 June. Ekādaśī runs from 12:56 on Mon 20 Jun to 12:42 on Tue 21 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-06-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shri-rama-dvadashi", "festival": "shri-rama-dvadashi", "name": "Śrī Rāma Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-22", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 162, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1983-06-21T12:42:10+08:00", "utc": "1983-06-21T04:42:10Z", "ms": 425018529781.9083 }, "end": { "local": "1983-06-22T12:58:28+08:00", "utc": "1983-06-22T04:58:28Z", "ms": 425105907771.4103 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-21T12:42:10+08:00", "utc": "1983-06-21T04:42:10Z", "ms": 425018529781.9083 }, "end": { "local": "1983-06-22T12:58:28+08:00", "utc": "1983-06-22T04:58:28Z", "ms": 425105907771.4103 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-06-21", "window": { "start": { "local": "1983-06-21T11:51:28+08:00", "utc": "1983-06-21T03:51:28Z", "ms": 425015488220.66486 }, "end": { "local": "1983-06-21T12:39:28+08:00", "utc": "1983-06-21T04:39:28Z", "ms": 425018368220.66486 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-06-22", "window": { "start": { "local": "1983-06-22T11:51:41+08:00", "utc": "1983-06-22T03:51:41Z", "ms": 425101900825.0343 }, "end": { "local": "1983-06-22T12:39:41+08:00", "utc": "1983-06-22T04:39:41Z", "ms": 425104780825.0343 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 12:42 on Tue 21 Jun to 12:58 on Wed 22 Jun.", "fact": "1983-06-21T04:42:10Z → 1983-06-22T04:58:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 21st, 11:52–12:40 on the 22nd.", "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 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: purvaviddha → only-day · margin 162 s < 300 s" }, { "step": "ruling", "text": "Śrī Rāma Dvādaśī, Lu’an, 1983: Wednesday 22 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": "1983-06-22", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-21", "confidence": "determinate" } ], "quote": "In Lu’an, Śrī Rāma Dvādaśī 1983 falls on Wednesday 22 June. Dvādaśī runs from 12:42 on Tue 21 Jun to 12:58 on Wed 22 Jun and covers all of madhyāhna that midday. It is 2 min 42 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/pradosha-vrata?on=1983-06-22", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20324, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-06-22T12:58:28+08:00", "utc": "1983-06-22T04:58:28Z", "ms": 425105907771.4103 }, "end": { "local": "1983-06-23T13:43:35+08:00", "utc": "1983-06-23T05:43:35Z", "ms": 425195015071.92633 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-22T12:58:28+08:00", "utc": "1983-06-22T04:58:28Z", "ms": 425105907771.4103 }, "end": { "local": "1983-06-23T13:43:35+08:00", "utc": "1983-06-23T05:43:35Z", "ms": 425195015071.92633 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-06-22", "window": { "start": { "local": "1983-06-22T19:22:08+08:00", "utc": "1983-06-22T11:22:08Z", "ms": 425128927853.06274 }, "end": { "local": "1983-06-22T20:40:26+08:00", "utc": "1983-06-22T12:40:26Z", "ms": 425133626444.9033 } }, "covered_min": 78, "window_min": 78, "qualifies": true }, { "local_date": "1983-06-23", "window": { "start": { "local": "1983-06-23T19:22:19+08:00", "utc": "1983-06-23T11:22:19Z", "ms": 425215339472.2044 }, "end": { "local": "1983-06-23T20:40:38+08:00", "utc": "1983-06-23T12:40:38Z", "ms": 425220038476.50995 } }, "covered_min": 0, "window_min": 78, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 12:58 on Wed 22 Jun to 13:44 on Thu 23 Jun.", "fact": "1983-06-22T04:58:28Z → 1983-06-23T05:43:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:22–20:40 on the 22nd, 19:22–20:41 on the 23rd.", "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 22nd and 0 of 78 on the 23rd.", "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": "Śukla Pradoṣa Vrata, Lu’an, 1983: Wednesday 22 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": "1983-06-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-22", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Wednesday 22 June. Trayodaśī runs from 12:58 on Wed 22 Jun to 13:44 on Thu 23 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-06-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/vata-savitri-vrata", "festival": "vata-savitri-vrata", "name": "Vaṭa Sāvitrī Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10253, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-06-24T14:55:32+08:00", "utc": "1983-06-24T06:55:32Z", "ms": 425285732453.5276 }, "end": { "local": "1983-06-25T16:31:46+08:00", "utc": "1983-06-25T08:31:46Z", "ms": 425377906049.19684 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-24T14:55:32+08:00", "utc": "1983-06-24T06:55:32Z", "ms": 425285732453.5276 }, "end": { "local": "1983-06-25T16:31:46+08:00", "utc": "1983-06-25T08:31:46Z", "ms": 425377906049.19684 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-06-24", "window": { "start": { "local": "1983-06-24T19:22:30+08:00", "utc": "1983-06-24T11:22:30Z", "ms": 425301749739.2637 }, "end": { "local": "1983-06-24T20:40:49+08:00", "utc": "1983-06-24T12:40:49Z", "ms": 425306449495.67584 } }, "covered_min": 78, "window_min": 78, "qualifies": true }, { "local_date": "1983-06-25", "window": { "start": { "local": "1983-06-25T19:22:39+08:00", "utc": "1983-06-25T11:22:39Z", "ms": 425388158637.51166 }, "end": { "local": "1983-06-25T20:40:59+08:00", "utc": "1983-06-25T12:40:59Z", "ms": 425392859484.8064 } }, "covered_min": 0, "window_min": 78, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:56 on Fri 24 Jun to 16:32 on Sat 25 Jun.", "fact": "1983-06-24T06:55:32Z → 1983-06-25T08:31:46Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:22–20:41 on the 24th, 19:23–20:41 on the 25th.", "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 24th and 0 of 78 on the 25th.", "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 10253 s" }, { "step": "ruling", "text": "Vaṭa Sāvitrī Vrata, Lu’an, 1983: Friday 24 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": "1983-06-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-24", "confidence": "determinate" } ], "quote": "In Lu’an, Vaṭa Sāvitrī Vrata 1983 falls on Friday 24 June. Pūrṇimā runs from 14:56 on Fri 24 Jun to 16:32 on Sat 25 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-06-29", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-06-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4749, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-06-28T23:06:45+08:00", "utc": "1983-06-28T15:06:45Z", "ms": 425660805055.1577 }, "end": { "local": "1983-06-30T01:33:51+08:00", "utc": "1983-06-29T17:33:51Z", "ms": 425756030962.79614 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-06-28T23:06:45+08:00", "utc": "1983-06-28T15:06:45Z", "ms": 425660805055.1577 }, "end": { "local": "1983-06-30T01:33:51+08:00", "utc": "1983-06-29T17:33:51Z", "ms": 425756030962.79614 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-06-28", "window": { "start": { "local": "1983-06-28T21:47:36+08:00", "utc": "1983-06-28T13:47:36Z", "ms": 425656055771.6428 }, "end": { "local": "1983-06-28T21:47:36+08:00", "utc": "1983-06-28T13:47:36Z", "ms": 425656055771.6428 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-06-29", "window": { "start": { "local": "1983-06-29T22:24:16+08:00", "utc": "1983-06-29T14:24:16Z", "ms": 425744655768.55286 }, "end": { "local": "1983-06-29T22:24:16+08:00", "utc": "1983-06-29T14:24:16Z", "ms": 425744655768.55286 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:07 on Tue 28 Jun to 01:34 on Thu 30 Jun.", "fact": "1983-06-28T15:06:45Z → 1983-06-29T17:33:51Z" }, { "step": "kaala", "text": "Moonrise is at 21:48 on the 28th and 22:24 on the 29th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 28th and is on the 29th.", "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 4749 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Wednesday 29 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": "1983-06-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-06-29", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Wednesday 29 June. Caturthī runs from 23:07 on Tue 28 Jun to 01:34 on Thu 30 Jun and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-06-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-07-07", "festival": "ekadashi", "name": "Yoginī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7370, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-07-06T08:30:10+08:00", "utc": "1983-07-06T00:30:10Z", "ms": 426299410275.1524 }, "end": { "local": "1983-07-07T07:17:22+08:00", "utc": "1983-07-06T23:17:22Z", "ms": 426381441615.6186 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-06T08:30:10+08:00", "utc": "1983-07-06T00:30:10Z", "ms": 426299410275.1524 }, "end": { "local": "1983-07-07T07:17:22+08:00", "utc": "1983-07-06T23:17:22Z", "ms": 426381441615.6186 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-07-06", "window": { "start": { "local": "1983-07-06T05:14:04+08:00", "utc": "1983-07-05T21:14:04Z", "ms": 426287643574.6299 }, "end": { "local": "1983-07-06T05:14:04+08:00", "utc": "1983-07-05T21:14:04Z", "ms": 426287643574.6299 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-07-07", "window": { "start": { "local": "1983-07-07T05:14:32+08:00", "utc": "1983-07-06T21:14:32Z", "ms": 426374071780.7593 }, "end": { "local": "1983-07-07T05:14:32+08:00", "utc": "1983-07-06T21:14:32Z", "ms": 426374071780.7593 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 08:30 on Wed 6 Jul to 07:17 on Thu 7 Jul.", "fact": "1983-07-06T00:30:10Z → 1983-07-06T23:17:22Z" }, { "step": "kaala", "text": "Sunrise is at 05:14 on the 6th and 05:15 on the 7th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 6th and is on the 7th.", "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 7370 s" }, { "step": "ruling", "text": "Yoginī Ekādaśī, Lu’an, 1983: Thursday 7 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": "1983-07-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-07", "confidence": "determinate" } ], "quote": "In Lu’an, Yoginī Ekādaśī 1983 falls on Thursday 7 July. Ekādaśī runs from 08:30 on Wed 6 Jul to 07:17 on Thu 7 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-07-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-07-08", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21983, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-07-08T05:21:26+08:00", "utc": "1983-07-07T21:21:26Z", "ms": 426460885882.00507 }, "end": { "local": "1983-07-09T02:47:51+08:00", "utc": "1983-07-08T18:47:51Z", "ms": 426538071039.1298 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-08T05:21:26+08:00", "utc": "1983-07-07T21:21:26Z", "ms": 426460885882.00507 }, "end": { "local": "1983-07-09T02:47:51+08:00", "utc": "1983-07-08T18:47:51Z", "ms": 426538071039.1298 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-07-07", "window": { "start": { "local": "1983-07-07T19:22:33+08:00", "utc": "1983-07-07T11:22:33Z", "ms": 426424952681.7629 }, "end": { "local": "1983-07-07T20:41:32+08:00", "utc": "1983-07-07T12:41:32Z", "ms": 426429692432.55664 } }, "covered_min": 0, "window_min": 79, "qualifies": false }, { "local_date": "1983-07-08", "window": { "start": { "local": "1983-07-08T19:22:23+08:00", "utc": "1983-07-08T11:22:23Z", "ms": 426511342633.73456 }, "end": { "local": "1983-07-08T20:41:28+08:00", "utc": "1983-07-08T12:41:28Z", "ms": 426516087700.4113 } }, "covered_min": 79, "window_min": 79, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 05:21 on Fri 8 Jul to 02:48 on Sat 9 Jul.", "fact": "1983-07-07T21:21:26Z → 1983-07-08T18:47:51Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:23–20:42 on the 7th, 19:22–20:41 on the 8th.", "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 7th and 79 of 79 on the 8th.", "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 21983 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Friday 8 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": "1983-07-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-08", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Friday 8 July. Trayodaśī runs from 05:21 on Fri 8 Jul to 02:48 on Sat 9 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-07-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-07-08", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-08", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 667, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-07-09T02:47:51+08:00", "utc": "1983-07-08T18:47:51Z", "ms": 426538071039.1298 }, "end": { "local": "1983-07-09T23:43:59+08:00", "utc": "1983-07-09T15:43:59Z", "ms": 426613438825.506 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-09T02:47:51+08:00", "utc": "1983-07-08T18:47:51Z", "ms": 426538071039.1298 }, "end": { "local": "1983-07-09T23:43:59+08:00", "utc": "1983-07-09T15:43:59Z", "ms": 426613438825.506 } }, "kaala": "nishita", "days": [ { "local_date": "1983-07-08", "window": { "start": { "local": "1983-07-08T23:54:57+08:00", "utc": "1983-07-08T15:54:57Z", "ms": 426527696633.77246 }, "end": { "local": "1983-07-09T00:42:57+08:00", "utc": "1983-07-08T16:42:57Z", "ms": 426530576633.77246 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-07-09", "window": { "start": { "local": "1983-07-09T23:55:06+08:00", "utc": "1983-07-09T15:55:06Z", "ms": 426614106135.3838 }, "end": { "local": "1983-07-10T00:43:06+08:00", "utc": "1983-07-09T16:43:06Z", "ms": 426616986135.3838 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 02:48 on Sat 9 Jul to 23:44 on Sat 9 Jul.", "fact": "1983-07-08T18:47:51Z → 1983-07-09T15:43:59Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:55–00:43 on the 8th, 23:55–00:43 on the 9th.", "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 8th and 0 of 48 on the 9th.", "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 667 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Friday 8 July.", "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": "1983-07-08", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-08", "confidence": "boundary" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Friday 8 July. Caturdaśī runs from 02:48 on Sat 9 Jul to 23:44 on Sat 9 Jul, and reaches niśītha on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-07-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/rathayatra", "festival": "rathayatra", "name": "Rathayātrā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1047, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1983-07-11T16:40:47+08:00", "utc": "1983-07-11T08:40:47Z", "ms": 426760847328.4632 }, "end": { "local": "1983-07-12T13:00:43+08:00", "utc": "1983-07-12T05:00:43Z", "ms": 426834043127.4068 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-11T16:40:47+08:00", "utc": "1983-07-11T08:40:47Z", "ms": 426760847328.4632 }, "end": { "local": "1983-07-12T13:00:43+08:00", "utc": "1983-07-12T05:00:43Z", "ms": 426834043127.4068 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-07-11", "window": { "start": { "local": "1983-07-11T11:55:08+08:00", "utc": "1983-07-11T03:55:08Z", "ms": 426743707913.3022 }, "end": { "local": "1983-07-11T12:43:08+08:00", "utc": "1983-07-11T04:43:08Z", "ms": 426746587913.3022 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-07-12", "window": { "start": { "local": "1983-07-12T11:55:16+08:00", "utc": "1983-07-12T03:55:16Z", "ms": 426830115805.1736 }, "end": { "local": "1983-07-12T12:43:16+08:00", "utc": "1983-07-12T04:43:16Z", "ms": 426832995805.1736 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 16:41 on Mon 11 Jul to 13:01 on Tue 12 Jul.", "fact": "1983-07-11T08:40:47Z → 1983-07-12T05:00:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 11th, 11:55–12:43 on the 12th.", "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 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: paraviddha → only-day · margin 1047 s" }, { "step": "ruling", "text": "Rathayātrā, Lu’an, 1983: Tuesday 12 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": "1983-07-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-12", "confidence": "determinate" } ], "quote": "In Lu’an, Rathayātrā 1983 falls on Tuesday 12 July. Dvitīyā runs from 16:41 on Mon 11 Jul to 13:01 on Tue 12 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-07-13", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8839, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-07-13T09:28:04+08:00", "utc": "1983-07-13T01:28:04Z", "ms": 426907683911.3018 }, "end": { "local": "1983-07-14T06:12:14+08:00", "utc": "1983-07-13T22:12:14Z", "ms": 426982334262.96027 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-13T09:28:04+08:00", "utc": "1983-07-13T01:28:04Z", "ms": 426907683911.3018 }, "end": { "local": "1983-07-14T06:12:14+08:00", "utc": "1983-07-13T22:12:14Z", "ms": 426982334262.96027 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-07-13", "window": { "start": { "local": "1983-07-13T11:55:23+08:00", "utc": "1983-07-13T03:55:23Z", "ms": 426916523240.9606 }, "end": { "local": "1983-07-13T12:43:23+08:00", "utc": "1983-07-13T04:43:23Z", "ms": 426919403240.9606 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-07-14", "window": { "start": { "local": "1983-07-14T11:55:30+08:00", "utc": "1983-07-14T03:55:30Z", "ms": 427002930200.6834 }, "end": { "local": "1983-07-14T12:43:30+08:00", "utc": "1983-07-14T04:43:30Z", "ms": 427005810200.6834 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 09:28 on Wed 13 Jul to 06:12 on Thu 14 Jul.", "fact": "1983-07-13T01:28:04Z → 1983-07-13T22:12:14Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 13th, 11:56–12:44 on the 14th.", "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 13th and 0 of 48 on the 14th.", "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 8839 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Wednesday 13 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": "1983-07-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-13", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Wednesday 13 July. Caturthī runs from 09:28 on Wed 13 Jul to 06:12 on Thu 14 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-07-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/skanda-panchami", "festival": "skanda-panchami", "name": "Skanda Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20596, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1983-07-14T06:12:14+08:00", "utc": "1983-07-13T22:12:14Z", "ms": 426982334262.96027 }, "end": { "local": "1983-07-15T03:21:50+08:00", "utc": "1983-07-14T19:21:50Z", "ms": 427058510242.0805 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-14T06:12:14+08:00", "utc": "1983-07-13T22:12:14Z", "ms": 426982334262.96027 }, "end": { "local": "1983-07-15T03:21:50+08:00", "utc": "1983-07-14T19:21:50Z", "ms": 427058510242.0805 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-07-14", "window": { "start": { "local": "1983-07-14T11:55:30+08:00", "utc": "1983-07-14T03:55:30Z", "ms": 427002930200.6834 }, "end": { "local": "1983-07-14T12:43:30+08:00", "utc": "1983-07-14T04:43:30Z", "ms": 427005810200.6834 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-07-15", "window": { "start": { "local": "1983-07-15T11:55:37+08:00", "utc": "1983-07-15T03:55:37Z", "ms": 427089336666.56274 }, "end": { "local": "1983-07-15T12:43:37+08:00", "utc": "1983-07-15T04:43:37Z", "ms": 427092216666.56274 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 06:12 on Thu 14 Jul to 03:22 on Fri 15 Jul.", "fact": "1983-07-13T22:12:14Z → 1983-07-14T19:21:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 14th, 11:56–12:44 on the 15th.", "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 14th and 0 of 48 on the 15th.", "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 20596 s" }, { "step": "ruling", "text": "Skanda Pañcamī, Lu’an, 1983: Thursday 14 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": "1983-07-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-14", "confidence": "determinate" } ], "quote": "In Lu’an, Skanda Pañcamī 1983 falls on Thursday 14 July. Pañcamī runs from 06:12 on Thu 14 Jul to 03:22 on Fri 15 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vivasvat-saptami", "festival": "vivasvat-saptami", "name": "Vivasvat Saptamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38461, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1983-07-16T01:04:10+08:00", "utc": "1983-07-15T17:04:10Z", "ms": 427136650255.9022 }, "end": { "local": "1983-07-16T23:24:44+08:00", "utc": "1983-07-16T15:24:44Z", "ms": 427217083600.2913 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-16T01:04:10+08:00", "utc": "1983-07-15T17:04:10Z", "ms": 427136650255.9022 }, "end": { "local": "1983-07-16T23:24:44+08:00", "utc": "1983-07-16T15:24:44Z", "ms": 427217083600.2913 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-07-15", "window": { "start": { "local": "1983-07-15T11:55:37+08:00", "utc": "1983-07-15T03:55:37Z", "ms": 427089336666.56274 }, "end": { "local": "1983-07-15T12:43:37+08:00", "utc": "1983-07-15T04:43:37Z", "ms": 427092216666.56274 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-07-16", "window": { "start": { "local": "1983-07-16T11:55:43+08:00", "utc": "1983-07-16T03:55:43Z", "ms": 427175742623.1047 }, "end": { "local": "1983-07-16T12:43:43+08:00", "utc": "1983-07-16T04:43:43Z", "ms": 427178622623.1047 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 01:04 on Sat 16 Jul to 23:25 on Sat 16 Jul.", "fact": "1983-07-15T17:04:10Z → 1983-07-16T15:24:44Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 15th, 11:56–12:44 on the 16th.", "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 15th and 48 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: purvaviddha → only-day · margin 38461 s" }, { "step": "ruling", "text": "Vivasvat Saptamī, Lu’an, 1983: Saturday 16 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": "1983-07-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-16", "confidence": "determinate" } ], "quote": "In Lu’an, Vivasvat Saptamī 1983 falls on Saturday 16 July. Saptamī runs from 01:04 on Sat 16 Jul to 23:25 on Sat 16 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-07-20", "festival": "ekadashi", "name": "Hariśayanī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20889, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-07-19T22:34:33+08:00", "utc": "1983-07-19T14:34:33Z", "ms": 427473272709.6069 }, "end": { "local": "1983-07-20T23:34:08+08:00", "utc": "1983-07-20T15:34:08Z", "ms": 427563247517.7855 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-19T22:34:33+08:00", "utc": "1983-07-19T14:34:33Z", "ms": 427473272709.6069 }, "end": { "local": "1983-07-20T23:34:08+08:00", "utc": "1983-07-20T15:34:08Z", "ms": 427563247517.7855 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-07-20", "window": { "start": { "local": "1983-07-20T05:21:40+08:00", "utc": "1983-07-19T21:21:40Z", "ms": 427497699876.7318 }, "end": { "local": "1983-07-20T05:21:40+08:00", "utc": "1983-07-19T21:21:40Z", "ms": 427497699876.7318 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-07-21", "window": { "start": { "local": "1983-07-21T05:22:16+08:00", "utc": "1983-07-20T21:22:16Z", "ms": 427584136288.4546 }, "end": { "local": "1983-07-21T05:22:16+08:00", "utc": "1983-07-20T21:22:16Z", "ms": 427584136288.4546 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 22:35 on Tue 19 Jul to 23:34 on Wed 20 Jul.", "fact": "1983-07-19T14:34:33Z → 1983-07-20T15:34:08Z" }, { "step": "kaala", "text": "Sunrise is at 05:22 on the 20th and 05:22 on the 21st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 20th and is not on the 21st.", "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 20889 s" }, { "step": "ruling", "text": "Hariśayanī Ekādaśī, Lu’an, 1983: Wednesday 20 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": "1983-07-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-20", "confidence": "determinate" } ], "quote": "In Lu’an, Hariśayanī Ekādaśī 1983 falls on Wednesday 20 July. Ekādaśī runs from 22:35 on Tue 19 Jul to 23:34 on Wed 20 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-07-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-07-22", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15902, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-07-22T01:03:35+08:00", "utc": "1983-07-21T17:03:35Z", "ms": 427655014989.45306 }, "end": { "local": "1983-07-23T02:56:26+08:00", "utc": "1983-07-22T18:56:26Z", "ms": 427748185572.82837 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-22T01:03:35+08:00", "utc": "1983-07-21T17:03:35Z", "ms": 427655014989.45306 }, "end": { "local": "1983-07-23T02:56:26+08:00", "utc": "1983-07-22T18:56:26Z", "ms": 427748185572.82837 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-07-21", "window": { "start": { "local": "1983-07-21T19:17:52+08:00", "utc": "1983-07-21T11:17:52Z", "ms": 427634272428.19666 }, "end": { "local": "1983-07-21T20:38:33+08:00", "utc": "1983-07-21T12:38:33Z", "ms": 427639112510.2806 } }, "covered_min": 0, "window_min": 81, "qualifies": false }, { "local_date": "1983-07-22", "window": { "start": { "local": "1983-07-22T19:17:21+08:00", "utc": "1983-07-22T11:17:21Z", "ms": 427720641027.54913 }, "end": { "local": "1983-07-22T20:38:10+08:00", "utc": "1983-07-22T12:38:10Z", "ms": 427725490239.4685 } }, "covered_min": 81, "window_min": 81, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:04 on Fri 22 Jul to 02:56 on Sat 23 Jul.", "fact": "1983-07-21T17:03:35Z → 1983-07-22T18:56:26Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:18–20:39 on the 21st, 19:17–20:38 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 0 of 81 minutes on the 21st and 81 of 81 on the 22nd.", "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 15902 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Friday 22 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": "1983-07-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-22", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Friday 22 July. Trayodaśī runs from 01:04 on Fri 22 Jul to 02:56 on Sat 23 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-07-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/vyasa-puja", "festival": "vyasa-puja", "name": "Vyāsa Pūjā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1076, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 } }, "kaala": "udaya-3", "days": [ { "local_date": "1983-07-24", "window": { "start": { "local": "1983-07-24T05:24:07+08:00", "utc": "1983-07-23T21:24:07Z", "ms": 427843447482.9676 }, "end": { "local": "1983-07-24T08:10:33+08:00", "utc": "1983-07-24T00:10:33Z", "ms": 427853432759.15265 } }, "covered_min": 166, "window_min": 166, "qualifies": true }, { "local_date": "1983-07-25", "window": { "start": { "local": "1983-07-25T05:24:45+08:00", "utc": "1983-07-24T21:24:45Z", "ms": 427929885118.0714 }, "end": { "local": "1983-07-25T08:10:56+08:00", "utc": "1983-07-25T00:10:56Z", "ms": 427939855721.3948 } }, "covered_min": 122, "window_min": 166, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul.", "fact": "1983-07-23T21:06:12Z → 1983-07-24T23:26:52Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 05:24–08:11 on the 24th, 05:25–08:11 on the 25th.", "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 166 of 166 minutes on the 24th and 122 of 166 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one morning qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 1076 s" }, { "step": "ruling", "text": "Vyāsa Pūjā, Lu’an, 1983: Sunday 24 July.", "fact": "confidence: determinate" } ], "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": "1983-07-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-24", "confidence": "determinate" } ], "quote": "In Lu’an, Vyāsa Pūjā 1983 falls on Sunday 24 July. Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/guru-purnima", "festival": "guru-purnima", "name": "Guru Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16160, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-07-24", "window": { "start": { "local": "1983-07-24T11:56:11+08:00", "utc": "1983-07-24T03:56:11Z", "ms": 427866970673.43024 }, "end": { "local": "1983-07-24T12:44:11+08:00", "utc": "1983-07-24T04:44:11Z", "ms": 427869850673.43024 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-07-25", "window": { "start": { "local": "1983-07-25T11:56:12+08:00", "utc": "1983-07-25T03:56:12Z", "ms": 427953371626.3799 }, "end": { "local": "1983-07-25T12:44:12+08:00", "utc": "1983-07-25T04:44:12Z", "ms": 427956251626.3799 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul.", "fact": "1983-07-23T21:06:12Z → 1983-07-24T23:26:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 24th, 11:56–12:44 on the 25th.", "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 24th and 0 of 48 on the 25th.", "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 16160 s" }, { "step": "ruling", "text": "Guru Pūrṇimā, Lu’an, 1983: Sunday 24 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": "1983-07-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-24", "confidence": "determinate" } ], "quote": "In Lu’an, Guru Pūrṇimā 1983 falls on Sunday 24 July. Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/kokila-vrata", "festival": "kokila-vrata", "name": "Kokilā Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32556, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 } }, "kaala": "sayahna", "days": [ { "local_date": "1983-07-24", "window": { "start": { "local": "1983-07-24T16:29:49+08:00", "utc": "1983-07-24T08:29:49Z", "ms": 427883388587.7078 }, "end": { "local": "1983-07-24T19:16:14+08:00", "utc": "1983-07-24T11:16:14Z", "ms": 427893373863.8929 } }, "covered_min": 166, "window_min": 166, "qualifies": true }, { "local_date": "1983-07-25", "window": { "start": { "local": "1983-07-25T16:29:28+08:00", "utc": "1983-07-25T08:29:28Z", "ms": 427969767531.3649 }, "end": { "local": "1983-07-25T19:15:38+08:00", "utc": "1983-07-25T11:15:38Z", "ms": 427979738134.6883 } }, "covered_min": 0, "window_min": 166, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul.", "fact": "1983-07-23T21:06:12Z → 1983-07-24T23:26:52Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:30–19:16 on the 24th, 16:29–19:16 on the 25th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 166 of 166 minutes on the 24th and 0 of 166 on the 25th.", "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 32556 s" }, { "step": "ruling", "text": "Kokilā Vrata, Lu’an, 1983: Sunday 24 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": "1983-07-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-24", "confidence": "determinate" } ], "quote": "In Lu’an, Kokilā Vrata 1983 falls on Sunday 24 July. Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/shiva-shayanotsava", "festival": "shiva-shayanotsava", "name": "Śiva Śayanotsava", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30505, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1983-07-24T05:06:12+08:00", "utc": "1983-07-23T21:06:12Z", "ms": 427842371618.45123 }, "end": { "local": "1983-07-25T07:26:52+08:00", "utc": "1983-07-24T23:26:52Z", "ms": 427937211697.1647 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-07-23", "window": { "start": { "local": "1983-07-23T19:16:48+08:00", "utc": "1983-07-23T11:16:48Z", "ms": 427807008167.26587 }, "end": { "local": "1983-07-23T20:37:47+08:00", "utc": "1983-07-23T12:37:47Z", "ms": 427811866742.69275 } }, "covered_min": 0, "window_min": 81, "qualifies": false }, { "local_date": "1983-07-24", "window": { "start": { "local": "1983-07-24T19:16:14+08:00", "utc": "1983-07-24T11:16:14Z", "ms": 427893373863.8929 }, "end": { "local": "1983-07-24T20:37:22+08:00", "utc": "1983-07-24T12:37:22Z", "ms": 427898242031.1167 } }, "covered_min": 81, "window_min": 81, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul.", "fact": "1983-07-23T21:06:12Z → 1983-07-24T23:26:52Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:17–20:38 on the 23rd, 19:16–20:37 on the 24th.", "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 81 minutes on the 23rd and 81 of 81 on the 24th.", "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 30505 s" }, { "step": "ruling", "text": "Śiva Śayanotsava, Lu’an, 1983: Sunday 24 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": "1983-07-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-24", "confidence": "determinate" } ], "quote": "In Lu’an, Śiva Śayanotsava 1983 falls on Sunday 24 July. Pūrṇimā runs from 05:06 on Sun 24 Jul to 07:27 on Mon 25 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ashunya-shayana-vrata-ashadha", "festival": "ashunya-shayana-vrata-ashadha", "name": "Aśūnya Śayana Vrata (Āṣāḍha)", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31193, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1983-07-26T09:52:51+08:00", "utc": "1983-07-26T01:52:51Z", "ms": 428032371447.7065 }, "end": { "local": "1983-07-27T12:18:45+08:00", "utc": "1983-07-27T04:18:45Z", "ms": 428127525149.3071 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-07-26T09:52:51+08:00", "utc": "1983-07-26T01:52:51Z", "ms": 428032371447.7065 }, "end": { "local": "1983-07-27T12:18:45+08:00", "utc": "1983-07-27T04:18:45Z", "ms": 428127525149.3071 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-07-26", "window": { "start": { "local": "1983-07-26T20:24:31+08:00", "utc": "1983-07-26T12:24:31Z", "ms": 428070270946.92126 }, "end": { "local": "1983-07-26T20:24:31+08:00", "utc": "1983-07-26T12:24:31Z", "ms": 428070270946.92126 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-07-27", "window": { "start": { "local": "1983-07-27T20:58:39+08:00", "utc": "1983-07-27T12:58:39Z", "ms": 428158718540.7364 }, "end": { "local": "1983-07-27T20:58:39+08:00", "utc": "1983-07-27T12:58:39Z", "ms": 428158718540.7364 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 09:53 on Tue 26 Jul to 12:19 on Wed 27 Jul.", "fact": "1983-07-26T01:52:51Z → 1983-07-27T04:18:45Z" }, { "step": "kaala", "text": "Moonrise is at 20:25 on the 26th and 20:59 on the 27th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā must be current at moonrise. It is on the 26th and is not on the 27th.", "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 31193 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata (Āṣāḍha), Lu’an, 1983: Tuesday 26 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": "1983-07-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-26", "confidence": "determinate" } ], "quote": "In Lu’an, Aśūnya Śayana Vrata (Āṣāḍha) 1983 falls on Tuesday 26 July. Dvitīyā runs from 09:53 on Tue 26 Jul to 12:19 on Wed 27 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-07-28", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-07-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18754, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-07-28T14:38:49+08:00", "utc": "1983-07-28T06:38:49Z", "ms": 428222328621.0902 }, "end": { "local": "1983-07-29T16:46:37+08:00", "utc": "1983-07-29T08:46:37Z", "ms": 428316397020.4681 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-07-28T14:38:49+08:00", "utc": "1983-07-28T06:38:49Z", "ms": 428222328621.0902 }, "end": { "local": "1983-07-29T16:46:37+08:00", "utc": "1983-07-29T08:46:37Z", "ms": 428316397020.4681 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-07-28", "window": { "start": { "local": "1983-07-28T21:29:51+08:00", "utc": "1983-07-28T13:29:51Z", "ms": 428246990569.7533 }, "end": { "local": "1983-07-28T21:29:51+08:00", "utc": "1983-07-28T13:29:51Z", "ms": 428246990569.7533 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-07-29", "window": { "start": { "local": "1983-07-29T21:59:11+08:00", "utc": "1983-07-29T13:59:11Z", "ms": 428335150656.6014 }, "end": { "local": "1983-07-29T21:59:11+08:00", "utc": "1983-07-29T13:59:11Z", "ms": 428335150656.6014 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 14:39 on Thu 28 Jul to 16:47 on Fri 29 Jul.", "fact": "1983-07-28T06:38:49Z → 1983-07-29T08:46:37Z" }, { "step": "kaala", "text": "Moonrise is at 21:30 on the 28th and 21:59 on the 29th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 28th and is not on the 29th.", "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 18754 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Thursday 28 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": "1983-07-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-07-28", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Thursday 28 July. Caturthī runs from 14:39 on Thu 28 Jul to 16:47 on Fri 29 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-07-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-08-05", "festival": "ekadashi", "name": "Kāmikā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38438, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-08-04T18:51:12+08:00", "utc": "1983-08-04T10:51:12Z", "ms": 428842272372.7695 }, "end": { "local": "1983-08-05T16:45:58+08:00", "utc": "1983-08-05T08:45:58Z", "ms": 428921157865.9705 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-04T18:51:12+08:00", "utc": "1983-08-04T10:51:12Z", "ms": 428842272372.7695 }, "end": { "local": "1983-08-05T16:45:58+08:00", "utc": "1983-08-05T08:45:58Z", "ms": 428921157865.9705 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-08-05", "window": { "start": { "local": "1983-08-05T05:31:51+08:00", "utc": "1983-08-04T21:31:51Z", "ms": 428880710864.15436 }, "end": { "local": "1983-08-05T05:31:51+08:00", "utc": "1983-08-04T21:31:51Z", "ms": 428880710864.15436 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-08-06", "window": { "start": { "local": "1983-08-06T05:32:30+08:00", "utc": "1983-08-05T21:32:30Z", "ms": 428967150140.3521 }, "end": { "local": "1983-08-06T05:32:30+08:00", "utc": "1983-08-05T21:32:30Z", "ms": 428967150140.3521 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:51 on Thu 4 Aug to 16:46 on Fri 5 Aug.", "fact": "1983-08-04T10:51:12Z → 1983-08-05T08:45:58Z" }, { "step": "kaala", "text": "Sunrise is at 05:32 on the 5th and 05:33 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 38438 s" }, { "step": "ruling", "text": "Kāmikā Ekādaśī, Lu’an, 1983: Friday 5 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": "1983-08-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-05", "confidence": "determinate" } ], "quote": "In Lu’an, Kāmikā Ekādaśī 1983 falls on Friday 5 August. Ekādaśī runs from 18:51 on Thu 4 Aug to 16:46 on Fri 5 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-08-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-08-06", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18270, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-08-06T14:02:15+08:00", "utc": "1983-08-06T06:02:15Z", "ms": 428997735472.06757 }, "end": { "local": "1983-08-07T10:47:01+08:00", "utc": "1983-08-07T02:47:01Z", "ms": 429072421232.3346 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-06T14:02:15+08:00", "utc": "1983-08-06T06:02:15Z", "ms": 428997735472.06757 }, "end": { "local": "1983-08-07T10:47:01+08:00", "utc": "1983-08-07T02:47:01Z", "ms": 429072421232.3346 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-08-06", "window": { "start": { "local": "1983-08-06T19:06:45+08:00", "utc": "1983-08-06T11:06:45Z", "ms": 429016005117.84595 }, "end": { "local": "1983-08-06T20:30:16+08:00", "utc": "1983-08-06T12:30:16Z", "ms": 429021016359.49854 } }, "covered_min": 84, "window_min": 84, "qualifies": true }, { "local_date": "1983-08-07", "window": { "start": { "local": "1983-08-07T19:05:53+08:00", "utc": "1983-08-07T11:05:53Z", "ms": 429102352619.39343 }, "end": { "local": "1983-08-07T20:29:36+08:00", "utc": "1983-08-07T12:29:36Z", "ms": 429107376098.6206 } }, "covered_min": 0, "window_min": 84, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 14:02 on Sat 6 Aug to 10:47 on Sun 7 Aug.", "fact": "1983-08-06T06:02:15Z → 1983-08-07T02:47:01Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:07–20:30 on the 6th, 19:06–20:30 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 84 of 84 minutes on the 6th and 0 of 84 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 18270 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Saturday 6 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": "1983-08-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-06", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Saturday 6 August. Trayodaśī runs from 14:02 on Sat 6 Aug to 10:47 on Sun 7 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-08-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-08-07", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23106, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-08-07T10:47:01+08:00", "utc": "1983-08-07T02:47:01Z", "ms": 429072421232.3346 }, "end": { "local": "1983-08-08T07:08:56+08:00", "utc": "1983-08-07T23:08:56Z", "ms": 429145736210.2618 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-07T10:47:01+08:00", "utc": "1983-08-07T02:47:01Z", "ms": 429072421232.3346 }, "end": { "local": "1983-08-08T07:08:56+08:00", "utc": "1983-08-07T23:08:56Z", "ms": 429145736210.2618 } }, "kaala": "nishita", "days": [ { "local_date": "1983-08-06", "window": { "start": { "local": "1983-08-06T23:55:57+08:00", "utc": "1983-08-06T15:55:57Z", "ms": 429033357274.0431 }, "end": { "local": "1983-08-07T00:43:57+08:00", "utc": "1983-08-06T16:43:57Z", "ms": 429036237274.0431 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-08-07", "window": { "start": { "local": "1983-08-07T23:55:51+08:00", "utc": "1983-08-07T15:55:51Z", "ms": 429119750666.49536 }, "end": { "local": "1983-08-08T00:43:51+08:00", "utc": "1983-08-07T16:43:51Z", "ms": 429122630666.49536 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:47 on Sun 7 Aug to 07:09 on Mon 8 Aug.", "fact": "1983-08-07T02:47:01Z → 1983-08-07T23:08:56Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:56–00:44 on the 6th, 23:56–00:44 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. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 23106 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Sunday 7 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": "1983-08-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-07", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Sunday 7 August. Caturdaśī runs from 10:47 on Sun 7 Aug to 07:09 on Mon 8 Aug and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-08-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/madhusrava-tritiya", "festival": "madhusrava-tritiya", "name": "Madhusravā Tṛtīyā", "everyday": "Hariyali Teej", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12723, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-08-10T19:40:03+08:00", "utc": "1983-08-10T11:40:03Z", "ms": 429363603241.3513 }, "end": { "local": "1983-08-11T16:15:02+08:00", "utc": "1983-08-11T08:15:02Z", "ms": 429437702246.32336 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-10T19:40:03+08:00", "utc": "1983-08-10T11:40:03Z", "ms": 429363603241.3513 }, "end": { "local": "1983-08-11T16:15:02+08:00", "utc": "1983-08-11T08:15:02Z", "ms": 429437702246.32336 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-10", "window": { "start": { "local": "1983-08-10T11:55:08+08:00", "utc": "1983-08-10T03:55:08Z", "ms": 429335707734.6266 }, "end": { "local": "1983-08-10T12:43:08+08:00", "utc": "1983-08-10T04:43:08Z", "ms": 429338587734.6266 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-08-11", "window": { "start": { "local": "1983-08-11T11:54:59+08:00", "utc": "1983-08-11T03:54:59Z", "ms": 429422098810.4923 }, "end": { "local": "1983-08-11T12:42:59+08:00", "utc": "1983-08-11T04:42:59Z", "ms": 429424978810.4923 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 19:40 on Wed 10 Aug to 16:15 on Thu 11 Aug.", "fact": "1983-08-10T11:40:03Z → 1983-08-11T08:15:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 10th, 11:55–12:43 on the 11th.", "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 10th and 48 of 48 on the 11th.", "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 12723 s" }, { "step": "ruling", "text": "Madhusravā Tṛtīyā, Lu’an, 1983: Thursday 11 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": "1983-08-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-11", "confidence": "determinate" } ], "quote": "In Lu’an, Madhusravā Tṛtīyā (Hariyali Teej) 1983 falls on Thursday 11 August. Tṛtīyā runs from 19:40 on Wed 10 Aug to 16:15 on Thu 11 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-08-12", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2216, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-08-11T16:15:02+08:00", "utc": "1983-08-11T08:15:02Z", "ms": 429437702246.32336 }, "end": { "local": "1983-08-12T13:19:46+08:00", "utc": "1983-08-12T05:19:46Z", "ms": 429513585524.12585 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-11T16:15:02+08:00", "utc": "1983-08-11T08:15:02Z", "ms": 429437702246.32336 }, "end": { "local": "1983-08-12T13:19:46+08:00", "utc": "1983-08-12T05:19:46Z", "ms": 429513585524.12585 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-11", "window": { "start": { "local": "1983-08-11T11:54:59+08:00", "utc": "1983-08-11T03:54:59Z", "ms": 429422098810.4923 }, "end": { "local": "1983-08-11T12:42:59+08:00", "utc": "1983-08-11T04:42:59Z", "ms": 429424978810.4923 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-08-12", "window": { "start": { "local": "1983-08-12T11:54:49+08:00", "utc": "1983-08-12T03:54:49Z", "ms": 429508489308.208 }, "end": { "local": "1983-08-12T12:42:49+08:00", "utc": "1983-08-12T04:42:49Z", "ms": 429511369308.208 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 16:15 on Thu 11 Aug to 13:20 on Fri 12 Aug.", "fact": "1983-08-11T08:15:02Z → 1983-08-12T05:19:46Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 11th, 11:55–12:43 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 2216 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Friday 12 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": "1983-08-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-12", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Friday 12 August. Caturthī runs from 16:15 on Thu 11 Aug to 13:20 on Fri 12 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-08-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/naga-panchami", "festival": "naga-panchami", "name": "Nāga Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2216, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1983-08-12T13:19:46+08:00", "utc": "1983-08-12T05:19:46Z", "ms": 429513585524.12585 }, "end": { "local": "1983-08-13T11:03:04+08:00", "utc": "1983-08-13T03:03:04Z", "ms": 429591784175.3465 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-12T13:19:46+08:00", "utc": "1983-08-12T05:19:46Z", "ms": 429513585524.12585 }, "end": { "local": "1983-08-13T11:03:04+08:00", "utc": "1983-08-13T03:03:04Z", "ms": 429591784175.3465 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-12", "window": { "start": { "local": "1983-08-12T11:54:49+08:00", "utc": "1983-08-12T03:54:49Z", "ms": 429508489308.208 }, "end": { "local": "1983-08-12T12:42:49+08:00", "utc": "1983-08-12T04:42:49Z", "ms": 429511369308.208 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-08-13", "window": { "start": { "local": "1983-08-13T11:54:39+08:00", "utc": "1983-08-13T03:54:39Z", "ms": 429594879231.8562 }, "end": { "local": "1983-08-13T12:42:39+08:00", "utc": "1983-08-13T04:42:39Z", "ms": 429597759231.8562 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 13:20 on Fri 12 Aug to 11:03 on Sat 13 Aug.", "fact": "1983-08-12T05:19:46Z → 1983-08-13T03:03:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 12th, 11:55–12:43 on the 13th.", "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 12th and 0 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: paraviddha → second-day · margin 2216 s" }, { "step": "ruling", "text": "Nāga Pañcamī, Lu’an, 1983: Saturday 13 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": "1983-08-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-13", "confidence": "boundary" } ], "quote": "In Lu’an, Nāga Pañcamī 1983 falls on Saturday 13 August. Pañcamī runs from 13:20 on Fri 12 Aug to 11:03 on Sat 13 Aug, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-08-19", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20397, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-08-18T11:20:15+08:00", "utc": "1983-08-18T03:20:15Z", "ms": 430024814640.4862 }, "end": { "local": "1983-08-19T13:20:20+08:00", "utc": "1983-08-19T05:20:20Z", "ms": 430118420360.80035 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-18T11:20:15+08:00", "utc": "1983-08-18T03:20:15Z", "ms": 430024814640.4862 }, "end": { "local": "1983-08-19T13:20:20+08:00", "utc": "1983-08-19T05:20:20Z", "ms": 430118420360.80035 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-08-18", "window": { "start": { "local": "1983-08-18T05:40:17+08:00", "utc": "1983-08-17T21:40:17Z", "ms": 430004417442.6976 }, "end": { "local": "1983-08-18T05:40:17+08:00", "utc": "1983-08-17T21:40:17Z", "ms": 430004417442.6976 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-08-19", "window": { "start": { "local": "1983-08-19T05:40:56+08:00", "utc": "1983-08-18T21:40:56Z", "ms": 430090855662.13544 }, "end": { "local": "1983-08-19T05:40:56+08:00", "utc": "1983-08-18T21:40:56Z", "ms": 430090855662.13544 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:20 on Thu 18 Aug to 13:20 on Fri 19 Aug.", "fact": "1983-08-18T03:20:15Z → 1983-08-19T05:20:20Z" }, { "step": "kaala", "text": "Sunrise is at 05:40 on the 18th and 05:41 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 20397 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Lu’an, 1983: Friday 19 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": "1983-08-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-19", "confidence": "determinate" } ], "quote": "In Lu’an, Putradā Ekādaśī 1983 falls on Friday 19 August. Ekādaśī runs from 11:20 on Thu 18 Aug to 13:20 on Fri 19 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-08-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/damodara-dvadashi", "festival": "damodara-dvadashi", "name": "Dāmodara Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2333, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1983-08-19T13:20:20+08:00", "utc": "1983-08-19T05:20:20Z", "ms": 430118420360.80035 }, "end": { "local": "1983-08-20T15:39:07+08:00", "utc": "1983-08-20T07:39:07Z", "ms": 430213147210.5383 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-19T13:20:20+08:00", "utc": "1983-08-19T05:20:20Z", "ms": 430118420360.80035 }, "end": { "local": "1983-08-20T15:39:07+08:00", "utc": "1983-08-20T07:39:07Z", "ms": 430213147210.5383 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-19", "window": { "start": { "local": "1983-08-19T11:53:27+08:00", "utc": "1983-08-19T03:53:27Z", "ms": 430113207165.53894 }, "end": { "local": "1983-08-19T12:41:27+08:00", "utc": "1983-08-19T04:41:27Z", "ms": 430116087165.53894 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-08-20", "window": { "start": { "local": "1983-08-20T11:53:13+08:00", "utc": "1983-08-20T03:53:13Z", "ms": 430199593322.15686 }, "end": { "local": "1983-08-20T12:41:13+08:00", "utc": "1983-08-20T04:41:13Z", "ms": 430202473322.15686 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 13:20 on Fri 19 Aug to 15:39 on Sat 20 Aug.", "fact": "1983-08-19T05:20:20Z → 1983-08-20T07:39:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 19th, 11:53–12:41 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 0 of 48 minutes on the 19th and 48 of 48 on the 20th.", "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 2333 s" }, { "step": "ruling", "text": "Dāmodara Dvādaśī, Lu’an, 1983: Saturday 20 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": "1983-08-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-19", "confidence": "determinate" } ], "quote": "In Lu’an, Dāmodara Dvādaśī 1983 falls on Saturday 20 August. Dvādaśī runs from 13:20 on Fri 19 Aug to 15:39 on Sat 20 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/pradosha-vrata?on=1983-08-20", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2691, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-08-20T15:39:07+08:00", "utc": "1983-08-20T07:39:07Z", "ms": 430213147210.5383 }, "end": { "local": "1983-08-21T18:06:55+08:00", "utc": "1983-08-21T10:06:55Z", "ms": 430308415038.91034 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-20T15:39:07+08:00", "utc": "1983-08-20T07:39:07Z", "ms": 430213147210.5383 }, "end": { "local": "1983-08-21T18:06:55+08:00", "utc": "1983-08-21T10:06:55Z", "ms": 430308415038.91034 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-08-20", "window": { "start": { "local": "1983-08-20T18:52:53+08:00", "utc": "1983-08-20T10:52:53Z", "ms": 430224772901.8109 }, "end": { "local": "1983-08-20T20:19:27+08:00", "utc": "1983-08-20T12:19:27Z", "ms": 430229967406.063 } }, "covered_min": 87, "window_min": 87, "qualifies": true }, { "local_date": "1983-08-21", "window": { "start": { "local": "1983-08-21T18:51:46+08:00", "utc": "1983-08-21T10:51:46Z", "ms": 430311106297.2392 }, "end": { "local": "1983-08-21T20:18:35+08:00", "utc": "1983-08-21T12:18:35Z", "ms": 430316314722.5257 } }, "covered_min": 0, "window_min": 87, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 15:39 on Sat 20 Aug to 18:07 on Sun 21 Aug.", "fact": "1983-08-20T07:39:07Z → 1983-08-21T10:06:55Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:53–20:19 on the 20th, 18:52–20:19 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 87 of 87 minutes on the 20th and 0 of 87 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 2691 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Saturday 20 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": "1983-08-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-20", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Saturday 20 August. Trayodaśī runs from 15:39 on Sat 20 Aug to 18:07 on Sun 21 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-08-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/raksha-bandhana", "festival": "raksha-bandhana", "name": "Rakṣā Bandhana", "everyday": "Rakhi", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14699, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-08-22T20:35:41+08:00", "utc": "1983-08-22T12:35:41Z", "ms": 430403740800.0254 }, "end": { "local": "1983-08-23T22:59:17+08:00", "utc": "1983-08-23T14:59:17Z", "ms": 430498756698.13367 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "second-half", "start": { "local": "1983-08-23T09:48:26+08:00", "utc": "1983-08-23T01:48:26Z", "ms": 430451306282.7146 }, "end": { "local": "1983-08-23T22:59:17+08:00", "utc": "1983-08-23T14:59:17Z", "ms": 430498756698.13367 } }, "kaala": "day", "days": [ { "local_date": "1983-08-22", "window": { "start": { "local": "1983-08-22T05:42:49+08:00", "utc": "1983-08-21T21:42:49Z", "ms": 430350169486.8881 }, "end": { "local": "1983-08-23T05:43:27+08:00", "utc": "1983-08-22T21:43:27Z", "ms": 430436607154.3984 } }, "covered_min": 0, "window_min": 1441, "qualifies": false }, { "local_date": "1983-08-23", "window": { "start": { "local": "1983-08-23T05:43:27+08:00", "utc": "1983-08-22T21:43:27Z", "ms": 430436607154.3984 }, "end": { "local": "1983-08-24T05:44:05+08:00", "utc": "1983-08-23T21:44:05Z", "ms": 430523044689.65173 } }, "covered_min": 791, "window_min": 1441, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 20:36 on Mon 22 Aug to 22:59 on Tue 23 Aug. Its second half begins at 09:48 on Tue 23 Aug.", "fact": "1983-08-22T12:35:41Z → 1983-08-23T14:59:17Z · second half from 1983-08-23T01:48:26Z" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 05:43 on the 22nd, and from 05:43 on the 23rd.", "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 0 of 1441 minutes on the 22nd and 791 of 1441 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one day qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 14699 s" }, { "step": "ruling", "text": "Rakṣā Bandhana, Lu’an, 1983: Tuesday 23 August.", "fact": "confidence: determinate" } ], "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": "1983-08-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-23", "confidence": "determinate" } ], "quote": "In Lu’an, Rakṣā Bandhana (Rakhi) 1983 falls on Tuesday 23 August. The second half of Pūrṇimā runs from 09:48 on Tue 23 Aug to 22:59 on Tue 23 Aug and lies within that day, sunrise to sunrise.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/rishi-tarpana", "festival": "rishi-tarpana", "name": "Ṛṣi Tarpaṇa", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28497, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-08-22T20:35:41+08:00", "utc": "1983-08-22T12:35:41Z", "ms": 430403740800.0254 }, "end": { "local": "1983-08-23T22:59:17+08:00", "utc": "1983-08-23T14:59:17Z", "ms": 430498756698.13367 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1983-08-22T20:35:41+08:00", "utc": "1983-08-22T12:35:41Z", "ms": 430403740800.0254 }, "end": { "local": "1983-08-23T22:59:17+08:00", "utc": "1983-08-23T14:59:17Z", "ms": 430498756698.13367 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-22", "window": { "start": { "local": "1983-08-22T11:52:44+08:00", "utc": "1983-08-22T03:52:44Z", "ms": 430372364185.43475 }, "end": { "local": "1983-08-22T12:40:44+08:00", "utc": "1983-08-22T04:40:44Z", "ms": 430375244185.43475 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-08-23", "window": { "start": { "local": "1983-08-23T11:52:29+08:00", "utc": "1983-08-23T03:52:29Z", "ms": 430458748922.64087 }, "end": { "local": "1983-08-23T12:40:29+08:00", "utc": "1983-08-23T04:40:29Z", "ms": 430461628922.64087 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 20:36 on Mon 22 Aug to 22:59 on Tue 23 Aug.", "fact": "1983-08-22T12:35:41Z → 1983-08-23T14:59:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:53–12:41 on the 22nd, 11:52–12:40 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 0 of 48 minutes on the 22nd and 48 of 48 on the 23rd.", "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 28497 s" }, { "step": "ruling", "text": "Ṛṣi Tarpaṇa, Lu’an, 1983: Tuesday 23 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": "1983-08-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-23", "confidence": "determinate" } ], "quote": "In Lu’an, Ṛṣi Tarpaṇa 1983 falls on Tuesday 23 August. Pūrṇimā runs from 20:36 on Mon 22 Aug to 22:59 on Tue 23 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ashunya-shayana-vrata", "festival": "ashunya-shayana-vrata", "name": "Aśūnya Śayana Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20452, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1983-08-25T01:13:11+08:00", "utc": "1983-08-24T17:13:11Z", "ms": 430593191445.99756 }, "end": { "local": "1983-08-26T03:13:49+08:00", "utc": "1983-08-25T19:13:49Z", "ms": 430686828944.4108 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-08-25T01:13:11+08:00", "utc": "1983-08-24T17:13:11Z", "ms": 430593191445.99756 }, "end": { "local": "1983-08-26T03:13:49+08:00", "utc": "1983-08-25T19:13:49Z", "ms": 430686828944.4108 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-08-24", "window": { "start": { "local": "1983-08-24T19:32:19+08:00", "utc": "1983-08-24T11:32:19Z", "ms": 430572739014.8506 }, "end": { "local": "1983-08-24T19:32:19+08:00", "utc": "1983-08-24T11:32:19Z", "ms": 430572739014.8506 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-08-25", "window": { "start": { "local": "1983-08-25T20:02:06+08:00", "utc": "1983-08-25T12:02:06Z", "ms": 430660926068.5481 }, "end": { "local": "1983-08-25T20:02:06+08:00", "utc": "1983-08-25T12:02:06Z", "ms": 430660926068.5481 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 01:13 on Thu 25 Aug to 03:14 on Fri 26 Aug.", "fact": "1983-08-24T17:13:11Z → 1983-08-25T19:13:49Z" }, { "step": "kaala", "text": "Moonrise is at 19:32 on the 24th and 20:02 on the 25th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā 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. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 20452 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata, Lu’an, 1983: Thursday 25 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": "1983-08-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-25", "confidence": "determinate" } ], "quote": "In Lu’an, Aśūnya Śayana Vrata 1983 falls on Thursday 25 August. Dvitīyā runs from 01:13 on Thu 25 Aug to 03:14 on Fri 26 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/kajjali-tritiya", "festival": "kajjali-tritiya", "name": "Kajjalī Tṛtīyā", "everyday": "Kajari Teej", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24822, "anga": { "type": "tithi", "index": 17, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-08-26T03:13:49+08:00", "utc": "1983-08-25T19:13:49Z", "ms": 430686828944.4108 }, "end": { "local": "1983-08-27T04:57:42+08:00", "utc": "1983-08-26T20:57:42Z", "ms": 430779461925.6496 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-08-26T03:13:49+08:00", "utc": "1983-08-25T19:13:49Z", "ms": 430686828944.4108 }, "end": { "local": "1983-08-27T04:57:42+08:00", "utc": "1983-08-26T20:57:42Z", "ms": 430779461925.6496 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-26", "window": { "start": { "local": "1983-08-26T11:51:41+08:00", "utc": "1983-08-26T03:51:41Z", "ms": 430717900551.6389 }, "end": { "local": "1983-08-26T12:39:41+08:00", "utc": "1983-08-26T04:39:41Z", "ms": 430720780551.6389 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-08-27", "window": { "start": { "local": "1983-08-27T11:51:24+08:00", "utc": "1983-08-27T03:51:24Z", "ms": 430804283623.8612 }, "end": { "local": "1983-08-27T12:39:24+08:00", "utc": "1983-08-27T04:39:24Z", "ms": 430807163623.8612 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 03:14 on Fri 26 Aug to 04:58 on Sat 27 Aug.", "fact": "1983-08-25T19:13:49Z → 1983-08-26T20:57:42Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 26th, 11:51–12:39 on the 27th.", "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 26th and 0 of 48 on the 27th.", "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 24822 s" }, { "step": "ruling", "text": "Kajjalī Tṛtīyā, Lu’an, 1983: Friday 26 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": "1983-08-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-26", "confidence": "determinate" } ], "quote": "In Lu’an, Kajjalī Tṛtīyā (Kajari Teej) 1983 falls on Friday 26 August. Tṛtīyā runs from 03:14 on Fri 26 Aug to 04:58 on Sat 27 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/bahula-chaturthi", "festival": "bahula-chaturthi", "name": "Bahulā Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35237, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-08-27T04:57:42+08:00", "utc": "1983-08-26T20:57:42Z", "ms": 430779461925.6496 }, "end": { "local": "1983-08-28T06:20:57+08:00", "utc": "1983-08-27T22:20:57Z", "ms": 430870856559.5163 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-08-27T04:57:42+08:00", "utc": "1983-08-26T20:57:42Z", "ms": 430779461925.6496 }, "end": { "local": "1983-08-28T06:20:57+08:00", "utc": "1983-08-27T22:20:57Z", "ms": 430870856559.5163 } }, "kaala": "sayahna", "days": [ { "local_date": "1983-08-27", "window": { "start": { "local": "1983-08-27T16:09:04+08:00", "utc": "1983-08-27T08:09:04Z", "ms": 430819743868.13855 }, "end": { "local": "1983-08-27T18:44:51+08:00", "utc": "1983-08-27T10:44:51Z", "ms": 430829090697.6568 } }, "covered_min": 156, "window_min": 156, "qualifies": true }, { "local_date": "1983-08-28", "window": { "start": { "local": "1983-08-28T16:08:14+08:00", "utc": "1983-08-28T08:08:14Z", "ms": 430906093952.11285 }, "end": { "local": "1983-08-28T18:43:39+08:00", "utc": "1983-08-28T10:43:39Z", "ms": 430915419038.0729 } }, "covered_min": 0, "window_min": 155, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 04:58 on Sat 27 Aug to 06:21 on Sun 28 Aug.", "fact": "1983-08-26T20:57:42Z → 1983-08-27T22:20:57Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:09–18:45 on the 27th, 16:08–18:44 on the 28th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during sāyāhna. It covers 156 of 156 minutes on the 27th and 0 of 155 on the 28th.", "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 35237 s" }, { "step": "ruling", "text": "Bahulā Caturthī, Lu’an, 1983: Saturday 27 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": "1983-08-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-27", "confidence": "determinate" } ], "quote": "In Lu’an, Bahulā Caturthī 1983 falls on Saturday 27 August. Caturthī runs from 04:58 on Sat 27 Aug to 06:21 on Sun 28 Aug and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-08-27", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30419, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-08-27T04:57:42+08:00", "utc": "1983-08-26T20:57:42Z", "ms": 430779461925.6496 }, "end": { "local": "1983-08-28T06:20:57+08:00", "utc": "1983-08-27T22:20:57Z", "ms": 430870856559.5163 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-08-27T04:57:42+08:00", "utc": "1983-08-26T20:57:42Z", "ms": 430779461925.6496 }, "end": { "local": "1983-08-28T06:20:57+08:00", "utc": "1983-08-27T22:20:57Z", "ms": 430870856559.5163 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-08-26", "window": { "start": { "local": "1983-08-26T20:30:43+08:00", "utc": "1983-08-26T12:30:43Z", "ms": 430749043088.6856 }, "end": { "local": "1983-08-26T20:30:43+08:00", "utc": "1983-08-26T12:30:43Z", "ms": 430749043088.6856 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-08-27", "window": { "start": { "local": "1983-08-27T20:59:14+08:00", "utc": "1983-08-27T12:59:14Z", "ms": 430837154137.43396 }, "end": { "local": "1983-08-27T20:59:14+08:00", "utc": "1983-08-27T12:59:14Z", "ms": 430837154137.43396 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 04:58 on Sat 27 Aug to 06:21 on Sun 28 Aug.", "fact": "1983-08-26T20:57:42Z → 1983-08-27T22:20:57Z" }, { "step": "kaala", "text": "Moonrise is at 20:31 on the 26th and 20:59 on the 27th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 26th and is on the 27th.", "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 30419 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Saturday 27 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": "1983-08-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-27", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Saturday 27 August. Caturthī runs from 04:58 on Sat 27 Aug to 06:21 on Sun 28 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-08-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/hala-shashthi", "festival": "hala-shashthi", "name": "Hala Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14616, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-08-29T07:19:00+08:00", "utc": "1983-08-28T23:19:00Z", "ms": 430960739764.90625 }, "end": { "local": "1983-08-30T07:46:54+08:00", "utc": "1983-08-29T23:46:54Z", "ms": 431048814406.4212 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-08-29T07:19:00+08:00", "utc": "1983-08-28T23:19:00Z", "ms": 430960739764.90625 }, "end": { "local": "1983-08-30T07:46:54+08:00", "utc": "1983-08-29T23:46:54Z", "ms": 431048814406.4212 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-29", "window": { "start": { "local": "1983-08-29T11:50:49+08:00", "utc": "1983-08-29T03:50:49Z", "ms": 430977048667.313 }, "end": { "local": "1983-08-29T12:38:49+08:00", "utc": "1983-08-29T04:38:49Z", "ms": 430979928667.313 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-08-30", "window": { "start": { "local": "1983-08-30T11:50:31+08:00", "utc": "1983-08-30T03:50:31Z", "ms": 431063430674.02356 }, "end": { "local": "1983-08-30T12:38:31+08:00", "utc": "1983-08-30T04:38:31Z", "ms": 431066310674.02356 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 07:19 on Mon 29 Aug to 07:47 on Tue 30 Aug.", "fact": "1983-08-28T23:19:00Z → 1983-08-29T23:46:54Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 29th, 11:51–12:39 on the 30th.", "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 29th and 0 of 48 on the 30th.", "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 14616 s" }, { "step": "ruling", "text": "Hala Ṣaṣṭhī, Lu’an, 1983: Monday 29 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": "1983-08-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-29", "confidence": "determinate" } ], "quote": "In Lu’an, Hala Ṣaṣṭhī 1983 falls on Monday 29 August. Ṣaṣṭhī runs from 07:19 on Mon 29 Aug to 07:47 on Tue 30 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/shitala-saptami", "festival": "shitala-saptami", "name": "Śītalā Saptamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14616, "anga": { "type": "tithi", "index": 21, "key": "saptami", "name": "Saptamī", "start": { "local": "1983-08-30T07:46:54+08:00", "utc": "1983-08-29T23:46:54Z", "ms": 431048814406.4212 }, "end": { "local": "1983-08-31T07:39:59+08:00", "utc": "1983-08-30T23:39:59Z", "ms": 431134798970.0406 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-08-30T07:46:54+08:00", "utc": "1983-08-29T23:46:54Z", "ms": 431048814406.4212 }, "end": { "local": "1983-08-31T07:39:59+08:00", "utc": "1983-08-30T23:39:59Z", "ms": 431134798970.0406 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-08-30", "window": { "start": { "local": "1983-08-30T11:50:31+08:00", "utc": "1983-08-30T03:50:31Z", "ms": 431063430674.02356 }, "end": { "local": "1983-08-30T12:38:31+08:00", "utc": "1983-08-30T04:38:31Z", "ms": 431066310674.02356 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-08-31", "window": { "start": { "local": "1983-08-31T11:50:12+08:00", "utc": "1983-08-31T03:50:12Z", "ms": 431149812360.9093 }, "end": { "local": "1983-08-31T12:38:12+08:00", "utc": "1983-08-31T04:38:12Z", "ms": 431152692360.9093 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 07:47 on Tue 30 Aug to 07:40 on Wed 31 Aug.", "fact": "1983-08-29T23:46:54Z → 1983-08-30T23:39:59Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 30th, 11:50–12:38 on the 31st.", "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 30th and 0 of 48 on the 31st.", "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 14616 s" }, { "step": "ruling", "text": "Śītalā Saptamī, Lu’an, 1983: Tuesday 30 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": "1983-08-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-30", "confidence": "determinate" } ], "quote": "In Lu’an, Śītalā Saptamī 1983 falls on Tuesday 30 August. Saptamī runs from 07:47 on Tue 30 Aug to 07:40 on Wed 31 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/janmashtami", "festival": "janmashtami", "name": "Janmāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-08-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22569, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-08-31T07:39:59+08:00", "utc": "1983-08-30T23:39:59Z", "ms": 431134798970.0406 }, "end": { "local": "1983-09-01T06:54:40+08:00", "utc": "1983-08-31T22:54:40Z", "ms": 431218479920.1056 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-08-31T07:39:59+08:00", "utc": "1983-08-30T23:39:59Z", "ms": 431134798970.0406 }, "end": { "local": "1983-09-01T06:54:40+08:00", "utc": "1983-08-31T22:54:40Z", "ms": 431218479920.1056 } }, "kaala": "nishita", "days": [ { "local_date": "1983-08-30", "window": { "start": { "local": "1983-08-30T23:50:49+08:00", "utc": "1983-08-30T15:50:49Z", "ms": 431106649059.4245 }, "end": { "local": "1983-08-31T00:38:49+08:00", "utc": "1983-08-30T16:38:49Z", "ms": 431109529059.4245 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-08-31", "window": { "start": { "local": "1983-08-31T23:50:31+08:00", "utc": "1983-08-31T15:50:31Z", "ms": 431193030705.51855 }, "end": { "local": "1983-09-01T00:38:31+08:00", "utc": "1983-08-31T16:38:31Z", "ms": 431195910705.51855 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 07:40 on Wed 31 Aug to 06:55 on Thu 1 Sep.", "fact": "1983-08-30T23:39:59Z → 1983-08-31T22:54:40Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:51–00:39 on the 30th, 23:51–00:39 on the 31st.", "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 30th and 48 of 48 on the 31st.", "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 22569 s" }, { "step": "ruling", "text": "Janmāṣṭamī, Lu’an, 1983: Wednesday 31 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": "1983-08-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-08-31", "confidence": "determinate" } ], "quote": "In Lu’an, Janmāṣṭamī 1983 falls on Wednesday 31 August. Aṣṭamī runs from 07:40 on Wed 31 Aug to 06:55 on Thu 1 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-09-03", "festival": "ekadashi", "name": "Ajā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8721, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-09-03T03:24:54+08:00", "utc": "1983-09-02T19:24:54Z", "ms": 431378693526.0222 }, "end": { "local": "1983-09-04T00:44:49+08:00", "utc": "1983-09-03T16:44:49Z", "ms": 431455488832.2825 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-03T03:24:54+08:00", "utc": "1983-09-02T19:24:54Z", "ms": 431378693526.0222 }, "end": { "local": "1983-09-04T00:44:49+08:00", "utc": "1983-09-03T16:44:49Z", "ms": 431455488832.2825 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-09-03", "window": { "start": { "local": "1983-09-03T05:50:14+08:00", "utc": "1983-09-02T21:50:14Z", "ms": 431387414042.06995 }, "end": { "local": "1983-09-03T05:50:14+08:00", "utc": "1983-09-02T21:50:14Z", "ms": 431387414042.06995 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-09-04", "window": { "start": { "local": "1983-09-04T05:50:51+08:00", "utc": "1983-09-03T21:50:51Z", "ms": 431473850522.43756 }, "end": { "local": "1983-09-04T05:50:51+08:00", "utc": "1983-09-03T21:50:51Z", "ms": 431473850522.43756 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:25 on Sat 3 Sep to 00:45 on Sun 4 Sep.", "fact": "1983-09-02T19:24:54Z → 1983-09-03T16:44:49Z" }, { "step": "kaala", "text": "Sunrise is at 05:50 on the 3rd and 05:51 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 8721 s" }, { "step": "ruling", "text": "Ajā Ekādaśī, Lu’an, 1983: Saturday 3 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": "1983-09-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-03", "confidence": "determinate" } ], "quote": "In Lu’an, Ajā Ekādaśī 1983 falls on Saturday 3 September. Ekādaśī runs from 03:25 on Sat 3 Sep to 00:45 on Sun 4 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-09-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-09-04", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-04", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 1808, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-09-04T21:35:04+08:00", "utc": "1983-09-04T13:35:04Z", "ms": 431530503687.1932 }, "end": { "local": "1983-09-05T18:03:38+08:00", "utc": "1983-09-05T10:03:38Z", "ms": 431604217771.27826 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-04T21:35:04+08:00", "utc": "1983-09-04T13:35:04Z", "ms": 431530503687.1932 }, "end": { "local": "1983-09-05T18:03:38+08:00", "utc": "1983-09-05T10:03:38Z", "ms": 431604217771.27826 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-09-04", "window": { "start": { "local": "1983-09-04T18:35:02+08:00", "utc": "1983-09-04T10:35:02Z", "ms": 431519701973.3598 }, "end": { "local": "1983-09-04T20:05:13+08:00", "utc": "1983-09-04T12:05:13Z", "ms": 431525113302.51373 } }, "covered_min": 0, "window_min": 90, "qualifies": false }, { "local_date": "1983-09-05", "window": { "start": { "local": "1983-09-05T18:33:46+08:00", "utc": "1983-09-05T10:33:46Z", "ms": 431606026222.6237 }, "end": { "local": "1983-09-05T20:04:13+08:00", "utc": "1983-09-05T12:04:13Z", "ms": 431611452500.1127 } }, "covered_min": 0, "window_min": 90, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 21:35 on Sun 4 Sep to 18:04 on Mon 5 Sep.", "fact": "1983-09-04T13:35:04Z → 1983-09-05T10:03:38Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:35–20:05 on the 4th, 18:34–20:04 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 0 of 90 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither evening qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 1808 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Sunday 4 September.", "fact": "confidence: boundary (absent-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": "1983-09-04", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-04", "confidence": "boundary" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Sunday 4 September. Trayodaśī runs from 21:35 on Sun 4 Sep to 18:04 on Mon 5 Sep, and reaches pradoṣa on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-09-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/aghora-chaturdashi", "festival": "aghora-chaturdashi", "name": "Aghora Caturdaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1808, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-09-05T18:03:38+08:00", "utc": "1983-09-05T10:03:38Z", "ms": 431604217771.27826 }, "end": { "local": "1983-09-06T14:20:04+08:00", "utc": "1983-09-06T06:20:04Z", "ms": 431677203847.4173 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-05T18:03:38+08:00", "utc": "1983-09-05T10:03:38Z", "ms": 431604217771.27826 }, "end": { "local": "1983-09-06T14:20:04+08:00", "utc": "1983-09-06T06:20:04Z", "ms": 431677203847.4173 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-09-05", "window": { "start": { "local": "1983-09-05T18:33:46+08:00", "utc": "1983-09-05T10:33:46Z", "ms": 431606026222.6237 }, "end": { "local": "1983-09-05T20:04:13+08:00", "utc": "1983-09-05T12:04:13Z", "ms": 431611452500.1127 } }, "covered_min": 90, "window_min": 90, "qualifies": true }, { "local_date": "1983-09-06", "window": { "start": { "local": "1983-09-06T18:32:30+08:00", "utc": "1983-09-06T10:32:30Z", "ms": 431692350075.84326 }, "end": { "local": "1983-09-06T20:03:11+08:00", "utc": "1983-09-06T12:03:11Z", "ms": 431697791347.11536 } }, "covered_min": 0, "window_min": 91, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 18:04 on Mon 5 Sep to 14:20 on Tue 6 Sep.", "fact": "1983-09-05T10:03:38Z → 1983-09-06T06:20:04Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:34–20:04 on the 5th, 18:33–20:03 on the 6th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 90 of 90 minutes on the 5th and 0 of 91 on the 6th.", "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 1808 s" }, { "step": "ruling", "text": "Aghora Caturdaśī, Lu’an, 1983: Monday 5 September.", "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": "1983-09-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-05", "confidence": "determinate" } ], "quote": "In Lu’an, Aghora Caturdaśī 1983 falls on Monday 5 September. Caturdaśī runs from 18:04 on Mon 5 Sep to 14:20 on Tue 6 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/shivaratri?on=1983-09-05", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20717, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-09-05T18:03:38+08:00", "utc": "1983-09-05T10:03:38Z", "ms": 431604217771.27826 }, "end": { "local": "1983-09-06T14:20:04+08:00", "utc": "1983-09-06T06:20:04Z", "ms": 431677203847.4173 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-05T18:03:38+08:00", "utc": "1983-09-05T10:03:38Z", "ms": 431604217771.27826 }, "end": { "local": "1983-09-06T14:20:04+08:00", "utc": "1983-09-06T06:20:04Z", "ms": 431677203847.4173 } }, "kaala": "nishita", "days": [ { "local_date": "1983-09-05", "window": { "start": { "local": "1983-09-05T23:48:55+08:00", "utc": "1983-09-05T15:48:55Z", "ms": 431624934763.20734 }, "end": { "local": "1983-09-06T00:36:55+08:00", "utc": "1983-09-05T16:36:55Z", "ms": 431627814763.20734 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-09-06", "window": { "start": { "local": "1983-09-06T23:48:35+08:00", "utc": "1983-09-06T15:48:35Z", "ms": 431711314843.1136 }, "end": { "local": "1983-09-07T00:36:35+08:00", "utc": "1983-09-06T16:36:35Z", "ms": 431714194843.1136 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 18:04 on Mon 5 Sep to 14:20 on Tue 6 Sep.", "fact": "1983-09-05T10:03:38Z → 1983-09-06T06:20:04Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:49–00:37 on the 5th, 23:49–00:37 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 20717 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Monday 5 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": "1983-09-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-05", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Monday 5 September. Caturdaśī runs from 18:04 on Mon 5 Sep to 14:20 on Tue 6 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-09-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/rudra-vrata", "festival": "rudra-vrata", "name": "Rudra Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4379, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1983-09-07T10:34:58+08:00", "utc": "1983-09-07T02:34:58Z", "ms": 431750097794.84454 }, "end": { "local": "1983-09-08T06:59:29+08:00", "utc": "1983-09-07T22:59:29Z", "ms": 431823569263.96436 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-07T10:34:58+08:00", "utc": "1983-09-07T02:34:58Z", "ms": 431750097794.84454 }, "end": { "local": "1983-09-08T06:59:29+08:00", "utc": "1983-09-07T22:59:29Z", "ms": 431823569263.96436 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-07", "window": { "start": { "local": "1983-09-07T11:47:57+08:00", "utc": "1983-09-07T03:47:57Z", "ms": 431754476583.2423 }, "end": { "local": "1983-09-07T12:35:57+08:00", "utc": "1983-09-07T04:35:57Z", "ms": 431757356583.2423 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-09-08", "window": { "start": { "local": "1983-09-08T11:47:36+08:00", "utc": "1983-09-08T03:47:36Z", "ms": 431840856275.4807 }, "end": { "local": "1983-09-08T12:35:36+08:00", "utc": "1983-09-08T04:35:36Z", "ms": 431843736275.4807 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 10:35 on Wed 7 Sep to 06:59 on Thu 8 Sep.", "fact": "1983-09-07T02:34:58Z → 1983-09-07T22:59:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 7th, 11:48–12:36 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 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 4379 s" }, { "step": "ruling", "text": "Rudra Vrata, Lu’an, 1983: Wednesday 7 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": "1983-09-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-07", "confidence": "determinate" } ], "quote": "In Lu’an, Rudra Vrata 1983 falls on Wednesday 7 September. Pratipadā runs from 10:35 on Wed 7 Sep to 06:59 on Thu 8 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/haritalika-vrata", "festival": "haritalika-vrata", "name": "Haritālikā Vrata", "everyday": "Hartalika Teej", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28945, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1983-09-09T03:44:51+08:00", "utc": "1983-09-08T19:44:51Z", "ms": 431898290884.42316 }, "end": { "local": "1983-09-10T01:01:42+08:00", "utc": "1983-09-09T17:01:42Z", "ms": 431974902123.7895 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-09T03:44:51+08:00", "utc": "1983-09-08T19:44:51Z", "ms": 431898290884.42316 }, "end": { "local": "1983-09-10T01:01:42+08:00", "utc": "1983-09-09T17:01:42Z", "ms": 431974902123.7895 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-09", "window": { "start": { "local": "1983-09-09T11:47:16+08:00", "utc": "1983-09-09T03:47:16Z", "ms": 431927235780.00366 }, "end": { "local": "1983-09-09T12:35:16+08:00", "utc": "1983-09-09T04:35:16Z", "ms": 431930115780.00366 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-09-10", "window": { "start": { "local": "1983-09-10T11:46:55+08:00", "utc": "1983-09-10T03:46:55Z", "ms": 432013615111.26215 }, "end": { "local": "1983-09-10T12:34:55+08:00", "utc": "1983-09-10T04:34:55Z", "ms": 432016495111.26215 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 03:45 on Fri 9 Sep to 01:02 on Sat 10 Sep.", "fact": "1983-09-08T19:44:51Z → 1983-09-09T17:01:42Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 9th, 11:47–12:35 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 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 28945 s" }, { "step": "ruling", "text": "Haritālikā Vrata, Lu’an, 1983: Friday 9 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": "1983-09-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-09", "confidence": "determinate" } ], "quote": "In Lu’an, Haritālikā Vrata (Hartalika Teej) 1983 falls on Friday 9 September. Tṛtīyā runs from 03:45 on Fri 9 Sep to 01:02 on Sat 10 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ganesha-chaturthi", "festival": "ganesha-chaturthi", "name": "Gaṇeśa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37469, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-09-10T01:01:42+08:00", "utc": "1983-09-09T17:01:42Z", "ms": 431974902123.7895 }, "end": { "local": "1983-09-10T22:59:24+08:00", "utc": "1983-09-10T14:59:24Z", "ms": 432053963907.0355 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-10T01:01:42+08:00", "utc": "1983-09-09T17:01:42Z", "ms": 431974902123.7895 }, "end": { "local": "1983-09-10T22:59:24+08:00", "utc": "1983-09-10T14:59:24Z", "ms": 432053963907.0355 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-09", "window": { "start": { "local": "1983-09-09T11:47:16+08:00", "utc": "1983-09-09T03:47:16Z", "ms": 431927235780.00366 }, "end": { "local": "1983-09-09T12:35:16+08:00", "utc": "1983-09-09T04:35:16Z", "ms": 431930115780.00366 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-09-10", "window": { "start": { "local": "1983-09-10T11:46:55+08:00", "utc": "1983-09-10T03:46:55Z", "ms": 432013615111.26215 }, "end": { "local": "1983-09-10T12:34:55+08:00", "utc": "1983-09-10T04:34:55Z", "ms": 432016495111.26215 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 01:02 on Sat 10 Sep to 22:59 on Sat 10 Sep.", "fact": "1983-09-09T17:01:42Z → 1983-09-10T14:59:24Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 9th, 11:47–12:35 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 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: purvaviddha → only-day · margin 37469 s" }, { "step": "ruling", "text": "Gaṇeśa Caturthī, Lu’an, 1983: Saturday 10 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": "1983-09-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-10", "confidence": "determinate" } ], "quote": "In Lu’an, Gaṇeśa Caturthī 1983 falls on Saturday 10 September. Caturthī runs from 01:02 on Sat 10 Sep to 22:59 on Sat 10 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/rishi-panchami", "festival": "rishi-panchami", "name": "Ṛṣi Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33028, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1983-09-10T22:59:24+08:00", "utc": "1983-09-10T14:59:24Z", "ms": 432053963907.0355 }, "end": { "local": "1983-09-11T21:45:03+08:00", "utc": "1983-09-11T13:45:03Z", "ms": 432135902707.82214 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-10T22:59:24+08:00", "utc": "1983-09-10T14:59:24Z", "ms": 432053963907.0355 }, "end": { "local": "1983-09-11T21:45:03+08:00", "utc": "1983-09-11T13:45:03Z", "ms": 432135902707.82214 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-10", "window": { "start": { "local": "1983-09-10T11:46:55+08:00", "utc": "1983-09-10T03:46:55Z", "ms": 432013615111.26215 }, "end": { "local": "1983-09-10T12:34:55+08:00", "utc": "1983-09-10T04:34:55Z", "ms": 432016495111.26215 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-09-11", "window": { "start": { "local": "1983-09-11T11:46:34+08:00", "utc": "1983-09-11T03:46:34Z", "ms": 432099994284.99023 }, "end": { "local": "1983-09-11T12:34:34+08:00", "utc": "1983-09-11T04:34:34Z", "ms": 432102874284.99023 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 22:59 on Sat 10 Sep to 21:45 on Sun 11 Sep.", "fact": "1983-09-10T14:59:24Z → 1983-09-11T13:45:03Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 10th, 11:47–12:35 on the 11th.", "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 10th and 48 of 48 on the 11th.", "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 33028 s" }, { "step": "ruling", "text": "Ṛṣi Pañcamī, Lu’an, 1983: Sunday 11 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": "1983-09-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-11", "confidence": "determinate" } ], "quote": "In Lu’an, Ṛṣi Pañcamī 1983 falls on Sunday 11 September. Pañcamī runs from 22:59 on Sat 10 Sep to 21:45 on Sun 11 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/surya-shashthi-bhadrapada", "festival": "surya-shashthi-bhadrapada", "name": "Sūrya Ṣaṣṭhī (Bhādrapada)", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31695, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-09-11T21:45:03+08:00", "utc": "1983-09-11T13:45:03Z", "ms": 432135902707.82214 }, "end": { "local": "1983-09-12T21:22:29+08:00", "utc": "1983-09-12T13:22:29Z", "ms": 432220948744.0847 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-11T21:45:03+08:00", "utc": "1983-09-11T13:45:03Z", "ms": 432135902707.82214 }, "end": { "local": "1983-09-12T21:22:29+08:00", "utc": "1983-09-12T13:22:29Z", "ms": 432220948744.0847 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-11", "window": { "start": { "local": "1983-09-11T11:46:34+08:00", "utc": "1983-09-11T03:46:34Z", "ms": 432099994284.99023 }, "end": { "local": "1983-09-11T12:34:34+08:00", "utc": "1983-09-11T04:34:34Z", "ms": 432102874284.99023 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-09-12", "window": { "start": { "local": "1983-09-12T11:46:13+08:00", "utc": "1983-09-12T03:46:13Z", "ms": 432186373318.10815 }, "end": { "local": "1983-09-12T12:34:13+08:00", "utc": "1983-09-12T04:34:13Z", "ms": 432189253318.10815 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 21:45 on Sun 11 Sep to 21:22 on Mon 12 Sep.", "fact": "1983-09-11T13:45:03Z → 1983-09-12T13:22:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 11th, 11:46–12:34 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 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 31695 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī (Bhādrapada), Lu’an, 1983: Monday 12 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": "1983-09-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-12", "confidence": "determinate" } ], "quote": "In Lu’an, Sūrya Ṣaṣṭhī (Bhādrapada) 1983 falls on Monday 12 September. Ṣaṣṭhī runs from 21:45 on Sun 11 Sep to 21:22 on Mon 12 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/muktabharana-vrata", "festival": "muktabharana-vrata", "name": "Muktābharaṇa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31695, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1983-09-12T21:22:29+08:00", "utc": "1983-09-12T13:22:29Z", "ms": 432220948744.0847 }, "end": { "local": "1983-09-13T21:51:22+08:00", "utc": "1983-09-13T13:51:22Z", "ms": 432309081618.66455 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-12T21:22:29+08:00", "utc": "1983-09-12T13:22:29Z", "ms": 432220948744.0847 }, "end": { "local": "1983-09-13T21:51:22+08:00", "utc": "1983-09-13T13:51:22Z", "ms": 432309081618.66455 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-12", "window": { "start": { "local": "1983-09-12T11:46:13+08:00", "utc": "1983-09-12T03:46:13Z", "ms": 432186373318.10815 }, "end": { "local": "1983-09-12T12:34:13+08:00", "utc": "1983-09-12T04:34:13Z", "ms": 432189253318.10815 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-09-13", "window": { "start": { "local": "1983-09-13T11:45:52+08:00", "utc": "1983-09-13T03:45:52Z", "ms": 432272752228.657 }, "end": { "local": "1983-09-13T12:33:52+08:00", "utc": "1983-09-13T04:33:52Z", "ms": 432275632228.657 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 21:22 on Mon 12 Sep to 21:51 on Tue 13 Sep.", "fact": "1983-09-12T13:22:29Z → 1983-09-13T13:51:22Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 12th, 11:46–12:34 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 0 of 48 minutes on the 12th and 48 of 48 on the 13th.", "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 31695 s" }, { "step": "ruling", "text": "Muktābharaṇa Vrata, Lu’an, 1983: Tuesday 13 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": "1983-09-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-13", "confidence": "determinate" } ], "quote": "In Lu’an, Muktābharaṇa Vrata 1983 falls on Tuesday 13 September. Saptamī runs from 21:22 on Mon 12 Sep to 21:51 on Tue 13 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/radhashtami", "festival": "radhashtami", "name": "Rādhāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33449, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-09-13T21:51:22+08:00", "utc": "1983-09-13T13:51:22Z", "ms": 432309081618.66455 }, "end": { "local": "1983-09-14T23:06:45+08:00", "utc": "1983-09-14T15:06:45Z", "ms": 432400004537.82623 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-13T21:51:22+08:00", "utc": "1983-09-13T13:51:22Z", "ms": 432309081618.66455 }, "end": { "local": "1983-09-14T23:06:45+08:00", "utc": "1983-09-14T15:06:45Z", "ms": 432400004537.82623 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-13", "window": { "start": { "local": "1983-09-13T11:45:52+08:00", "utc": "1983-09-13T03:45:52Z", "ms": 432272752228.657 }, "end": { "local": "1983-09-13T12:33:52+08:00", "utc": "1983-09-13T04:33:52Z", "ms": 432275632228.657 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-09-14", "window": { "start": { "local": "1983-09-14T11:45:31+08:00", "utc": "1983-09-14T03:45:31Z", "ms": 432359131035.9155 }, "end": { "local": "1983-09-14T12:33:31+08:00", "utc": "1983-09-14T04:33:31Z", "ms": 432362011035.9155 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 21:51 on Tue 13 Sep to 23:07 on Wed 14 Sep.", "fact": "1983-09-13T13:51:22Z → 1983-09-14T15:06:45Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 13th, 11:46–12:34 on the 14th.", "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 13th and 48 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 33449 s" }, { "step": "ruling", "text": "Rādhāṣṭamī, Lu’an, 1983: Wednesday 14 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": "1983-09-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-14", "confidence": "determinate" } ], "quote": "In Lu’an, Rādhāṣṭamī 1983 falls on Wednesday 14 September. Aṣṭamī runs from 21:51 on Tue 13 Sep to 23:07 on Wed 14 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-09-17", "festival": "ekadashi", "name": "Parivartanī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 684, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-09-17T03:17:30+08:00", "utc": "1983-09-16T19:17:30Z", "ms": 432587849633.0959 }, "end": { "local": "1983-09-18T05:47:53+08:00", "utc": "1983-09-17T21:47:53Z", "ms": 432683272820.3975 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-17T03:17:30+08:00", "utc": "1983-09-16T19:17:30Z", "ms": 432587849633.0959 }, "end": { "local": "1983-09-18T05:47:53+08:00", "utc": "1983-09-17T21:47:53Z", "ms": 432683272820.3975 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-09-17", "window": { "start": { "local": "1983-09-17T05:58:41+08:00", "utc": "1983-09-16T21:58:41Z", "ms": 432597520770.9615 }, "end": { "local": "1983-09-17T05:58:41+08:00", "utc": "1983-09-16T21:58:41Z", "ms": 432597520770.9615 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-09-18", "window": { "start": { "local": "1983-09-18T05:59:17+08:00", "utc": "1983-09-17T21:59:17Z", "ms": 432683956895.3858 }, "end": { "local": "1983-09-18T05:59:17+08:00", "utc": "1983-09-17T21:59:17Z", "ms": 432683956895.3858 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:17 on Sat 17 Sep to 05:48 on Sun 18 Sep.", "fact": "1983-09-16T19:17:30Z → 1983-09-17T21:47:53Z" }, { "step": "kaala", "text": "Sunrise is at 05:59 on the 17th and 05:59 on the 18th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 17th and is not on the 18th.", "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 684 s" }, { "step": "ruling", "text": "Parivartanī Ekādaśī, Lu’an, 1983: Saturday 17 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": "1983-09-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-17", "confidence": "determinate" } ], "quote": "In Lu’an, Parivartanī Ekādaśī 1983 falls on Saturday 17 September. Ekādaśī runs from 03:17 on Sat 17 Sep to 05:48 on Sun 18 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-09-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/vamana-jayanti", "festival": "vamana-jayanti", "name": "Vāmana Jayantī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12297, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1983-09-18T05:47:53+08:00", "utc": "1983-09-17T21:47:53Z", "ms": 432683272820.3975 }, "end": { "local": "1983-09-19T08:18:47+08:00", "utc": "1983-09-19T00:18:47Z", "ms": 432778726850.19135 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-18T05:47:53+08:00", "utc": "1983-09-17T21:47:53Z", "ms": 432683272820.3975 }, "end": { "local": "1983-09-19T08:18:47+08:00", "utc": "1983-09-19T00:18:47Z", "ms": 432778726850.19135 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-09-18", "window": { "start": { "local": "1983-09-18T11:44:06+08:00", "utc": "1983-09-18T03:44:06Z", "ms": 432704645634.85974 }, "end": { "local": "1983-09-18T12:32:06+08:00", "utc": "1983-09-18T04:32:06Z", "ms": 432707525634.85974 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-09-19", "window": { "start": { "local": "1983-09-19T11:43:44+08:00", "utc": "1983-09-19T03:43:44Z", "ms": 432791024234.0642 }, "end": { "local": "1983-09-19T12:31:44+08:00", "utc": "1983-09-19T04:31:44Z", "ms": 432793904234.0642 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 05:48 on Sun 18 Sep to 08:19 on Mon 19 Sep.", "fact": "1983-09-17T21:47:53Z → 1983-09-19T00:18:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 18th, 11:44–12:32 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 48 of 48 minutes on the 18th and 0 of 48 on the 19th.", "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 12297 s" }, { "step": "ruling", "text": "Vāmana Jayantī, Lu’an, 1983: Sunday 18 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": "1983-09-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-18", "confidence": "determinate" } ], "quote": "In Lu’an, Vāmana Jayantī 1983 falls on Sunday 18 September. Dvādaśī runs from 05:48 on Sun 18 Sep to 08:19 on Mon 19 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/pradosha-vrata?on=1983-09-19", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27204, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-09-19T08:18:47+08:00", "utc": "1983-09-19T00:18:47Z", "ms": 432778726850.19135 }, "end": { "local": "1983-09-20T10:40:52+08:00", "utc": "1983-09-20T02:40:52Z", "ms": 432873651941.4936 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-19T08:18:47+08:00", "utc": "1983-09-19T00:18:47Z", "ms": 432778726850.19135 }, "end": { "local": "1983-09-20T10:40:52+08:00", "utc": "1983-09-20T02:40:52Z", "ms": 432873651941.4936 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-09-19", "window": { "start": { "local": "1983-09-19T18:15:35+08:00", "utc": "1983-09-19T10:15:35Z", "ms": 432814535396.62823 }, "end": { "local": "1983-09-19T19:49:35+08:00", "utc": "1983-09-19T11:49:35Z", "ms": 432820174585.67426 } }, "covered_min": 94, "window_min": 94, "qualifies": true }, { "local_date": "1983-09-20", "window": { "start": { "local": "1983-09-20T18:14:16+08:00", "utc": "1983-09-20T10:14:16Z", "ms": 432900856400.10144 }, "end": { "local": "1983-09-20T19:48:31+08:00", "utc": "1983-09-20T11:48:31Z", "ms": 432906510965.43243 } }, "covered_min": 0, "window_min": 94, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 08:19 on Mon 19 Sep to 10:41 on Tue 20 Sep.", "fact": "1983-09-19T00:18:47Z → 1983-09-20T02:40:52Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:16–19:50 on the 19th, 18:14–19:49 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 94 of 94 minutes on the 19th and 0 of 94 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 27204 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Monday 19 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": "1983-09-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-19", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Monday 19 September. Trayodaśī runs from 08:19 on Mon 19 Sep to 10:41 on Tue 20 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-09-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ananta-chaturdashi", "festival": "ananta-chaturdashi", "name": "Ananta Caturdaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8017, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-09-20T10:40:52+08:00", "utc": "1983-09-20T02:40:52Z", "ms": 432873651941.4936 }, "end": { "local": "1983-09-21T12:47:50+08:00", "utc": "1983-09-21T04:47:50Z", "ms": 432967670475.08875 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1983-09-20T10:40:52+08:00", "utc": "1983-09-20T02:40:52Z", "ms": 432873651941.4936 }, "end": { "local": "1983-09-21T12:47:50+08:00", "utc": "1983-09-21T04:47:50Z", "ms": 432967670475.08875 } }, "kaala": "udaya-3", "days": [ { "local_date": "1983-09-20", "window": { "start": { "local": "1983-09-20T06:00:29+08:00", "utc": "1983-09-19T22:00:29Z", "ms": 432856829314.47327 }, "end": { "local": "1983-09-20T08:27:15+08:00", "utc": "1983-09-20T00:27:15Z", "ms": 432865634731.5989 } }, "covered_min": 0, "window_min": 147, "qualifies": false }, { "local_date": "1983-09-21", "window": { "start": { "local": "1983-09-21T06:01:06+08:00", "utc": "1983-09-20T22:01:06Z", "ms": 432943265640.0841 }, "end": { "local": "1983-09-21T08:27:28+08:00", "utc": "1983-09-21T00:27:28Z", "ms": 432952047994.9877 } }, "covered_min": 146, "window_min": 146, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:41 on Tue 20 Sep to 12:48 on Wed 21 Sep.", "fact": "1983-09-20T02:40:52Z → 1983-09-21T04:47:50Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:00–08:27 on the 20th, 06:01–08:27 on the 21st.", "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 0 of 147 minutes on the 20th and 146 of 146 on the 21st.", "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 8017 s" }, { "step": "ruling", "text": "Ananta Caturdaśī, Lu’an, 1983: Wednesday 21 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": "1983-09-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-21", "confidence": "determinate" } ], "quote": "In Lu’an, Ananta Caturdaśī 1983 falls on Wednesday 21 September. Caturdaśī runs from 10:41 on Tue 20 Sep to 12:48 on Wed 21 Sep and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-09-25", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7580, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-09-25T17:56:13+08:00", "utc": "1983-09-25T09:56:13Z", "ms": 433331773087.7416 }, "end": { "local": "1983-09-26T18:18:24+08:00", "utc": "1983-09-26T10:18:24Z", "ms": 433419503559.66223 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-09-25T17:56:13+08:00", "utc": "1983-09-25T09:56:13Z", "ms": 433331773087.7416 }, "end": { "local": "1983-09-26T18:18:24+08:00", "utc": "1983-09-26T10:18:24Z", "ms": 433419503559.66223 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-09-25", "window": { "start": { "local": "1983-09-25T20:02:33+08:00", "utc": "1983-09-25T12:02:33Z", "ms": 433339352748.6845 }, "end": { "local": "1983-09-25T20:02:33+08:00", "utc": "1983-09-25T12:02:33Z", "ms": 433339352748.6845 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-09-26", "window": { "start": { "local": "1983-09-26T20:36:47+08:00", "utc": "1983-09-26T12:36:47Z", "ms": 433427806971.0596 }, "end": { "local": "1983-09-26T20:36:47+08:00", "utc": "1983-09-26T12:36:47Z", "ms": 433427806971.0596 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:56 on Sun 25 Sep to 18:18 on Mon 26 Sep.", "fact": "1983-09-25T09:56:13Z → 1983-09-26T10:18:24Z" }, { "step": "kaala", "text": "Moonrise is at 20:03 on the 25th and 20:37 on the 26th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is 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": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 7580 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Sunday 25 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": "1983-09-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-25", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Sunday 25 September. Caturthī runs from 17:56 on Sun 25 Sep to 18:18 on Mon 26 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-09-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/chandra-shashthi", "festival": "chandra-shashthi", "name": "Candra Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10801, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-09-27T18:15:40+08:00", "utc": "1983-09-27T10:15:40Z", "ms": 433505739588.6756 }, "end": { "local": "1983-09-28T17:45:41+08:00", "utc": "1983-09-28T09:45:41Z", "ms": 433590341495.6047 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-09-27T18:15:40+08:00", "utc": "1983-09-27T10:15:40Z", "ms": 433505739588.6756 }, "end": { "local": "1983-09-28T17:45:41+08:00", "utc": "1983-09-28T09:45:41Z", "ms": 433590341495.6047 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-09-27", "window": { "start": { "local": "1983-09-27T21:15:40+08:00", "utc": "1983-09-27T13:15:40Z", "ms": 433516540129.66656 }, "end": { "local": "1983-09-27T21:15:40+08:00", "utc": "1983-09-27T13:15:40Z", "ms": 433516540129.66656 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-09-28", "window": { "start": { "local": "1983-09-28T22:00:41+08:00", "utc": "1983-09-28T14:00:41Z", "ms": 433605641122.95026 }, "end": { "local": "1983-09-28T22:00:41+08:00", "utc": "1983-09-28T14:00:41Z", "ms": 433605641122.95026 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 18:16 on Tue 27 Sep to 17:46 on Wed 28 Sep.", "fact": "1983-09-27T10:15:40Z → 1983-09-28T09:45:41Z" }, { "step": "kaala", "text": "Moonrise is at 21:16 on the 27th and 22:01 on the 28th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Ṣaṣṭhī 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. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 10801 s" }, { "step": "ruling", "text": "Candra Ṣaṣṭhī, Lu’an, 1983: Tuesday 27 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": "1983-09-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-27", "confidence": "determinate" } ], "quote": "In Lu’an, Candra Ṣaṣṭhī 1983 falls on Tuesday 27 September. Ṣaṣṭhī runs from 18:16 on Tue 27 Sep to 17:46 on Wed 28 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/jitashtami", "festival": "jitashtami", "name": "Jitāṣṭamī", "everyday": "Jitiya", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4568, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-09-29T16:46:21+08:00", "utc": "1983-09-29T08:46:21Z", "ms": 433673181140.45905 }, "end": { "local": "1983-09-30T15:16:27+08:00", "utc": "1983-09-30T07:16:27Z", "ms": 433754186656.73047 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-09-29T16:46:21+08:00", "utc": "1983-09-29T08:46:21Z", "ms": 433673181140.45905 }, "end": { "local": "1983-09-30T15:16:27+08:00", "utc": "1983-09-30T07:16:27Z", "ms": 433754186656.73047 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-09-29", "window": { "start": { "local": "1983-09-29T18:02:30+08:00", "utc": "1983-09-29T10:02:30Z", "ms": 433677749526.589 }, "end": { "local": "1983-09-29T19:39:03+08:00", "utc": "1983-09-29T11:39:03Z", "ms": 433683542796.7303 } }, "covered_min": 97, "window_min": 97, "qualifies": true }, { "local_date": "1983-09-30", "window": { "start": { "local": "1983-09-30T18:01:12+08:00", "utc": "1983-09-30T10:01:12Z", "ms": 433764071987.8813 }, "end": { "local": "1983-09-30T19:38:01+08:00", "utc": "1983-09-30T11:38:01Z", "ms": 433769880671.7705 } }, "covered_min": 0, "window_min": 97, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 16:46 on Thu 29 Sep to 15:16 on Fri 30 Sep.", "fact": "1983-09-29T08:46:21Z → 1983-09-30T07:16:27Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:02–19:39 on the 29th, 18:01–19:38 on the 30th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī 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. 103" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 4568 s" }, { "step": "ruling", "text": "Jitāṣṭamī, Lu’an, 1983: Thursday 29 September.", "fact": "confidence: determinate" } ], "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": "1983-09-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-29", "confidence": "determinate" } ], "quote": "In Lu’an, Jitāṣṭamī (Jitiya) 1983 falls on Thursday 29 September. Aṣṭamī runs from 16:46 on Thu 29 Sep to 15:16 on Fri 30 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/mahalakshmi-vrata-samapana", "festival": "mahalakshmi-vrata-samapana", "name": "Mahālakṣmī Vrata Samāpana", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-09-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21996, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-09-29T16:46:21+08:00", "utc": "1983-09-29T08:46:21Z", "ms": 433673181140.45905 }, "end": { "local": "1983-09-30T15:16:27+08:00", "utc": "1983-09-30T07:16:27Z", "ms": 433754186656.73047 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-09-29T16:46:21+08:00", "utc": "1983-09-29T08:46:21Z", "ms": 433673181140.45905 }, "end": { "local": "1983-09-30T15:16:27+08:00", "utc": "1983-09-30T07:16:27Z", "ms": 433754186656.73047 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-09-29", "window": { "start": { "local": "1983-09-29T22:52:57+08:00", "utc": "1983-09-29T14:52:57Z", "ms": 433695176744.9012 }, "end": { "local": "1983-09-29T22:52:57+08:00", "utc": "1983-09-29T14:52:57Z", "ms": 433695176744.9012 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-09-30", "window": { "start": { "local": "1983-09-30T23:52:35+08:00", "utc": "1983-09-30T15:52:35Z", "ms": 433785155304.8587 }, "end": { "local": "1983-09-30T23:52:35+08:00", "utc": "1983-09-30T15:52:35Z", "ms": 433785155304.8587 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 16:46 on Thu 29 Sep to 15:16 on Fri 30 Sep.", "fact": "1983-09-29T08:46:21Z → 1983-09-30T07:16:27Z" }, { "step": "kaala", "text": "Moonrise is at 22:53 on the 29th and 23:53 on the 30th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is on the 29th and is not on the 30th.", "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 21996 s" }, { "step": "ruling", "text": "Mahālakṣmī Vrata Samāpana, Lu’an, 1983: Thursday 29 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": "1983-09-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-09-29", "confidence": "determinate" } ], "quote": "In Lu’an, Mahālakṣmī Vrata Samāpana 1983 falls on Thursday 29 September. Aṣṭamī runs from 16:46 on Thu 29 Sep to 15:16 on Fri 30 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-10-03", "festival": "ekadashi", "name": "Indirā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6545, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-10-02T10:48:35+08:00", "utc": "1983-10-02T02:48:35Z", "ms": 433910914998.21936 }, "end": { "local": "1983-10-03T07:57:39+08:00", "utc": "1983-10-02T23:57:39Z", "ms": 433987058679.3556 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-02T10:48:35+08:00", "utc": "1983-10-02T02:48:35Z", "ms": 433910914998.21936 }, "end": { "local": "1983-10-03T07:57:39+08:00", "utc": "1983-10-02T23:57:39Z", "ms": 433987058679.3556 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-10-02", "window": { "start": { "local": "1983-10-02T06:07:55+08:00", "utc": "1983-10-01T22:07:55Z", "ms": 433894075436.8895 }, "end": { "local": "1983-10-02T06:07:55+08:00", "utc": "1983-10-01T22:07:55Z", "ms": 433894075436.8895 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-10-03", "window": { "start": { "local": "1983-10-03T06:08:34+08:00", "utc": "1983-10-02T22:08:34Z", "ms": 433980514021.9704 }, "end": { "local": "1983-10-03T06:08:34+08:00", "utc": "1983-10-02T22:08:34Z", "ms": 433980514021.9704 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:49 on Sun 2 Oct to 07:58 on Mon 3 Oct.", "fact": "1983-10-02T02:48:35Z → 1983-10-02T23:57:39Z" }, { "step": "kaala", "text": "Sunrise is at 06:08 on the 2nd and 06:09 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 6545 s" }, { "step": "ruling", "text": "Indirā Ekādaśī, Lu’an, 1983: Monday 3 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": "1983-10-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-03", "confidence": "determinate" } ], "quote": "In Lu’an, Indirā Ekādaśī 1983 falls on Monday 3 October. Ekādaśī runs from 10:49 on Sun 2 Oct to 07:58 on Mon 3 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-10-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-10-04", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21617, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-10-04T04:50:07+08:00", "utc": "1983-10-03T20:50:07Z", "ms": 434062207222.1639 }, "end": { "local": "1983-10-05T01:34:13+08:00", "utc": "1983-10-04T17:34:13Z", "ms": 434136852908.2408 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-04T04:50:07+08:00", "utc": "1983-10-03T20:50:07Z", "ms": 434062207222.1639 }, "end": { "local": "1983-10-05T01:34:13+08:00", "utc": "1983-10-04T17:34:13Z", "ms": 434136852908.2408 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-10-03", "window": { "start": { "local": "1983-10-03T17:57:21+08:00", "utc": "1983-10-03T09:57:21Z", "ms": 434023041333.6797 }, "end": { "local": "1983-10-03T19:34:56+08:00", "utc": "1983-10-03T11:34:56Z", "ms": 434028896206.63727 } }, "covered_min": 0, "window_min": 98, "qualifies": false }, { "local_date": "1983-10-04", "window": { "start": { "local": "1983-10-04T17:56:05+08:00", "utc": "1983-10-04T09:56:05Z", "ms": 434109365193.8863 }, "end": { "local": "1983-10-04T19:33:55+08:00", "utc": "1983-10-04T11:33:55Z", "ms": 434115235437.4751 } }, "covered_min": 98, "window_min": 98, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:50 on Tue 4 Oct to 01:34 on Wed 5 Oct.", "fact": "1983-10-03T20:50:07Z → 1983-10-04T17:34:13Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:57–19:35 on the 3rd, 17:56–19:34 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 98 minutes on the 3rd and 98 of 98 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 21617 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Tuesday 4 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": "1983-10-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-04", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Tuesday 4 October. Trayodaśī runs from 04:50 on Tue 4 Oct to 01:34 on Wed 5 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-10-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-10-04", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-04", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 4034, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-10-05T01:34:13+08:00", "utc": "1983-10-04T17:34:13Z", "ms": 434136852908.2408 }, "end": { "local": "1983-10-05T22:19:21+08:00", "utc": "1983-10-05T14:19:21Z", "ms": 434211560622.9649 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-05T01:34:13+08:00", "utc": "1983-10-04T17:34:13Z", "ms": 434136852908.2408 }, "end": { "local": "1983-10-05T22:19:21+08:00", "utc": "1983-10-05T14:19:21Z", "ms": 434211560622.9649 } }, "kaala": "nishita", "days": [ { "local_date": "1983-10-04", "window": { "start": { "local": "1983-10-04T23:38:59+08:00", "utc": "1983-10-04T15:38:59Z", "ms": 434129938607.34424 }, "end": { "local": "1983-10-05T00:26:59+08:00", "utc": "1983-10-04T16:26:59Z", "ms": 434132818607.34424 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-10-05", "window": { "start": { "local": "1983-10-05T23:38:40+08:00", "utc": "1983-10-05T15:38:40Z", "ms": 434216320459.0474 }, "end": { "local": "1983-10-06T00:26:40+08:00", "utc": "1983-10-05T16:26:40Z", "ms": 434219200459.0474 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 01:34 on Wed 5 Oct to 22:19 on Wed 5 Oct.", "fact": "1983-10-04T17:34:13Z → 1983-10-05T14:19:21Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:39–00:27 on the 4th, 23:39–00:27 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 0 of 48 on the 5th.", "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 4034 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Tuesday 4 October.", "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": "1983-10-04", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-04", "confidence": "boundary" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Tuesday 4 October. Caturdaśī runs from 01:34 on Wed 5 Oct to 22:19 on Wed 5 Oct, and reaches niśītha on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-10-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/mahalaya-amavasya", "festival": "mahalaya-amavasya", "name": "Mahālaya Amāvāsyā", "everyday": "Sarvapitṛ Amāvāsyā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13361, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1983-10-05T22:19:21+08:00", "utc": "1983-10-05T14:19:21Z", "ms": 434211560622.9649 }, "end": { "local": "1983-10-06T19:15:39+08:00", "utc": "1983-10-06T11:15:39Z", "ms": 434286938748.07806 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-05T22:19:21+08:00", "utc": "1983-10-05T14:19:21Z", "ms": 434211560622.9649 }, "end": { "local": "1983-10-06T19:15:39+08:00", "utc": "1983-10-06T11:15:39Z", "ms": 434286938748.07806 } }, "kaala": "aparahna", "days": [ { "local_date": "1983-10-05", "window": { "start": { "local": "1983-10-05T13:12:50+08:00", "utc": "1983-10-05T05:12:50Z", "ms": 434178770490.4145 }, "end": { "local": "1983-10-05T15:33:50+08:00", "utc": "1983-10-05T07:33:50Z", "ms": 434187229980.2852 } }, "covered_min": 0, "window_min": 141, "qualifies": false }, { "local_date": "1983-10-06", "window": { "start": { "local": "1983-10-06T13:12:21+08:00", "utc": "1983-10-06T05:12:21Z", "ms": 434265141091.83826 }, "end": { "local": "1983-10-06T15:32:58+08:00", "utc": "1983-10-06T07:32:58Z", "ms": 434273577639.80475 } }, "covered_min": 141, "window_min": 141, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 22:19 on Wed 5 Oct to 19:16 on Thu 6 Oct.", "fact": "1983-10-05T14:19:21Z → 1983-10-06T11:15:39Z" }, { "step": "kaala", "text": "Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:13–15:34 on the 5th, 13:12–15:33 on the 6th.", "fact": "aparahna: day-muhurta-10-12 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during aparāhṇa. It covers 0 of 141 minutes on the 5th and 141 of 141 on the 6th.", "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 13361 s" }, { "step": "ruling", "text": "Mahālaya Amāvāsyā, Lu’an, 1983: Thursday 6 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": "1983-10-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-06", "confidence": "determinate" } ], "quote": "In Lu’an, Mahālaya Amāvāsyā 1983 falls on Thursday 6 October. Amāvasyā runs from 22:19 on Wed 5 Oct to 19:16 on Thu 6 Oct and covers all of aparāhṇa that afternoon.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/navaratra-arambha", "festival": "navaratra-arambha", "name": "Navarātrārambha", "everyday": "Navratri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14861, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1983-10-06T19:15:39+08:00", "utc": "1983-10-06T11:15:39Z", "ms": 434286938748.07806 }, "end": { "local": "1983-10-07T16:33:27+08:00", "utc": "1983-10-07T08:33:27Z", "ms": 434363606662.78345 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-06T19:15:39+08:00", "utc": "1983-10-06T11:15:39Z", "ms": 434286938748.07806 }, "end": { "local": "1983-10-07T16:33:27+08:00", "utc": "1983-10-07T08:33:27Z", "ms": 434363606662.78345 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-10-06", "window": { "start": { "local": "1983-10-06T11:38:03+08:00", "utc": "1983-10-06T03:38:03Z", "ms": 434259482817.85504 }, "end": { "local": "1983-10-06T12:26:03+08:00", "utc": "1983-10-06T04:26:03Z", "ms": 434262362817.85504 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-10-07", "window": { "start": { "local": "1983-10-07T11:37:45+08:00", "utc": "1983-10-07T03:37:45Z", "ms": 434345865269.7915 }, "end": { "local": "1983-10-07T12:25:45+08:00", "utc": "1983-10-07T04:25:45Z", "ms": 434348745269.7915 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 19:16 on Thu 6 Oct to 16:33 on Fri 7 Oct.", "fact": "1983-10-06T11:15:39Z → 1983-10-07T08:33:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 6th, 11:38–12:26 on the 7th.", "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 6th and 48 of 48 on the 7th.", "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 14861 s" }, { "step": "ruling", "text": "Navarātrārambha, Lu’an, 1983: Friday 7 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": "1983-10-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-07", "confidence": "determinate" } ], "quote": "In Lu’an, Navarātrārambha (Navratri) 1983 falls on Friday 7 October. Pratipadā runs from 19:16 on Thu 6 Oct to 16:33 on Fri 7 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-10-10", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1060, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-10-09T12:51:45+08:00", "utc": "1983-10-09T04:51:45Z", "ms": 434523104502.5022 }, "end": { "local": "1983-10-10T12:07:15+08:00", "utc": "1983-10-10T04:07:15Z", "ms": 434606835229.27966 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-09T12:51:45+08:00", "utc": "1983-10-09T04:51:45Z", "ms": 434523104502.5022 }, "end": { "local": "1983-10-10T12:07:15+08:00", "utc": "1983-10-10T04:07:15Z", "ms": 434606835229.27966 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-10-09", "window": { "start": { "local": "1983-10-09T11:37:11+08:00", "utc": "1983-10-09T03:37:11Z", "ms": 434518631373.7559 }, "end": { "local": "1983-10-09T12:25:11+08:00", "utc": "1983-10-09T04:25:11Z", "ms": 434521511373.7559 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-10-10", "window": { "start": { "local": "1983-10-10T11:36:55+08:00", "utc": "1983-10-10T03:36:55Z", "ms": 434605015057.5337 }, "end": { "local": "1983-10-10T12:24:55+08:00", "utc": "1983-10-10T04:24:55Z", "ms": 434607895057.5337 } }, "covered_min": 30, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:52 on Sun 9 Oct to 12:07 on Mon 10 Oct.", "fact": "1983-10-09T04:51:45Z → 1983-10-10T04:07:15Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:37–12:25 on the 9th, 11:37–12:25 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 0 of 48 minutes on the 9th and 30 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 1060 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Monday 10 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": "1983-10-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-10", "confidence": "boundary" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Monday 10 October. Caturthī runs from 12:52 on Sun 9 Oct to 12:07 on Mon 10 Oct and covers 30 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-10-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/durga-saptami", "festival": "durga-saptami", "name": "Durgā Saptamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21896, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1983-10-12T13:05:37+08:00", "utc": "1983-10-12T05:05:37Z", "ms": 434783136680.05066 }, "end": { "local": "1983-10-13T14:41:27+08:00", "utc": "1983-10-13T06:41:27Z", "ms": 434875286685.9585 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-12T13:05:37+08:00", "utc": "1983-10-12T05:05:37Z", "ms": 434783136680.05066 }, "end": { "local": "1983-10-13T14:41:27+08:00", "utc": "1983-10-13T06:41:27Z", "ms": 434875286685.9585 } }, "kaala": "udaya-1", "days": [ { "local_date": "1983-10-12", "window": { "start": { "local": "1983-10-12T06:14:34+08:00", "utc": "1983-10-11T22:14:34Z", "ms": 434758474333.5418 }, "end": { "local": "1983-10-12T07:00:41+08:00", "utc": "1983-10-11T23:00:41Z", "ms": 434761240925.41864 } }, "covered_min": 0, "window_min": 46, "qualifies": false }, { "local_date": "1983-10-13", "window": { "start": { "local": "1983-10-13T06:15:16+08:00", "utc": "1983-10-12T22:15:16Z", "ms": 434844915919.7484 }, "end": { "local": "1983-10-13T07:01:15+08:00", "utc": "1983-10-12T23:01:15Z", "ms": 434847674975.68445 } }, "covered_min": 46, "window_min": 46, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 13:06 on Wed 12 Oct to 14:41 on Thu 13 Oct.", "fact": "1983-10-12T05:05:37Z → 1983-10-13T06:41:27Z" }, { "step": "kaala", "text": "The first muhūrta after sunrise is 1st of 15 day muhūrtas: 06:15–07:01 on the 12th, 06:15–07:01 on the 13th.", "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 0 of 46 minutes on the 12th and 46 of 46 on the 13th.", "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 21896 s" }, { "step": "ruling", "text": "Durgā Saptamī, Lu’an, 1983: Thursday 13 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": "1983-10-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-13", "confidence": "determinate" } ], "quote": "In Lu’an, Durgā Saptamī 1983 falls on Thursday 13 October. Saptamī runs from 13:06 on Wed 12 Oct to 14:41 on Thu 13 Oct and covers all of the first muhūrta after sunrise that morning.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/mahashtami", "festival": "mahashtami", "name": "Mahāṣṭamī", "everyday": "Durga Ashtami", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8238, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-10-13T14:41:27+08:00", "utc": "1983-10-13T06:41:27Z", "ms": 434875286685.9585 }, "end": { "local": "1983-10-14T16:49:28+08:00", "utc": "1983-10-14T08:49:28Z", "ms": 434969368374.752 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-13T14:41:27+08:00", "utc": "1983-10-13T06:41:27Z", "ms": 434875286685.9585 }, "end": { "local": "1983-10-14T16:49:28+08:00", "utc": "1983-10-14T08:49:28Z", "ms": 434969368374.752 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-10-13", "window": { "start": { "local": "1983-10-13T11:36:09+08:00", "utc": "1983-10-13T03:36:09Z", "ms": 434864168839.26886 }, "end": { "local": "1983-10-13T12:24:09+08:00", "utc": "1983-10-13T04:24:09Z", "ms": 434867048839.26886 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-10-14", "window": { "start": { "local": "1983-10-14T11:35:54+08:00", "utc": "1983-10-14T03:35:54Z", "ms": 434950554402.97876 }, "end": { "local": "1983-10-14T12:23:54+08:00", "utc": "1983-10-14T04:23:54Z", "ms": 434953434402.97876 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 14:41 on Thu 13 Oct to 16:49 on Fri 14 Oct.", "fact": "1983-10-13T06:41:27Z → 1983-10-14T08:49:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 13th, 11:36–12:24 on the 14th.", "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 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: paraviddha → only-day · margin 8238 s" }, { "step": "ruling", "text": "Mahāṣṭamī, Lu’an, 1983: Friday 14 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": "1983-10-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-14", "confidence": "determinate" } ], "quote": "In Lu’an, Mahāṣṭamī (Durga Ashtami) 1983 falls on Friday 14 October. Aṣṭamī runs from 14:41 on Thu 13 Oct to 16:49 on Fri 14 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/mahanavami", "festival": "mahanavami", "name": "Mahānavamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15934, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1983-10-14T16:49:28+08:00", "utc": "1983-10-14T08:49:28Z", "ms": 434969368374.752 }, "end": { "local": "1983-10-15T19:16:22+08:00", "utc": "1983-10-15T11:16:22Z", "ms": 435064581909.4645 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-14T16:49:28+08:00", "utc": "1983-10-14T08:49:28Z", "ms": 434969368374.752 }, "end": { "local": "1983-10-15T19:16:22+08:00", "utc": "1983-10-15T11:16:22Z", "ms": 435064581909.4645 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-10-14", "window": { "start": { "local": "1983-10-14T11:35:54+08:00", "utc": "1983-10-14T03:35:54Z", "ms": 434950554402.97876 }, "end": { "local": "1983-10-14T12:23:54+08:00", "utc": "1983-10-14T04:23:54Z", "ms": 434953434402.97876 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-10-15", "window": { "start": { "local": "1983-10-15T11:35:40+08:00", "utc": "1983-10-15T03:35:40Z", "ms": 435036940482.38306 }, "end": { "local": "1983-10-15T12:23:40+08:00", "utc": "1983-10-15T04:23:40Z", "ms": 435039820482.38306 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 16:49 on Fri 14 Oct to 19:16 on Sat 15 Oct.", "fact": "1983-10-14T08:49:28Z → 1983-10-15T11:16:22Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 14th, 11:36–12:24 on the 15th.", "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 14th and 48 of 48 on the 15th.", "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 15934 s" }, { "step": "ruling", "text": "Mahānavamī, Lu’an, 1983: Saturday 15 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": "1983-10-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-15", "confidence": "determinate" } ], "quote": "In Lu’an, Mahānavamī 1983 falls on Saturday 15 October. Navamī runs from 16:49 on Fri 14 Oct to 19:16 on Sat 15 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vijaya-dashami", "festival": "vijaya-dashami", "name": "Vijayā Daśamī", "everyday": "Dussehra", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5621, "anga": { "type": "tithi", "index": 9, "key": "dashami", "name": "Daśamī", "start": { "local": "1983-10-15T19:16:22+08:00", "utc": "1983-10-15T11:16:22Z", "ms": 435064581909.4645 }, "end": { "local": "1983-10-16T21:47:51+08:00", "utc": "1983-10-16T13:47:51Z", "ms": 435160071389.24774 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "conjunction", "start": { "local": "1983-10-15T19:16:22+08:00", "utc": "1983-10-15T11:16:22Z", "ms": 435064581909.4645 }, "end": { "local": "1983-10-16T10:19:22+08:00", "utc": "1983-10-16T02:19:22Z", "ms": 435118761842.6473 }, "nakshatra": { "type": "nakshatra", "index": 21, "key": "shravana", "name": "Śravaṇa", "start": { "local": "1983-10-15T07:19:15+08:00", "utc": "1983-10-14T23:19:15Z", "ms": 435021555345.83344 }, "end": { "local": "1983-10-16T10:19:22+08:00", "utc": "1983-10-16T02:19:22Z", "ms": 435118761842.6473 } } }, "kaala": "daytime", "days": [ { "local_date": "1983-10-15", "window": { "start": { "local": "1983-10-15T06:16:40+08:00", "utc": "1983-10-14T22:16:40Z", "ms": 435017800097.70123 }, "end": { "local": "1983-10-15T17:42:41+08:00", "utc": "1983-10-15T09:42:41Z", "ms": 435058960867.0648 } }, "covered_min": 0, "window_min": 686, "qualifies": false }, { "local_date": "1983-10-16", "window": { "start": { "local": "1983-10-16T06:17:23+08:00", "utc": "1983-10-15T22:17:23Z", "ms": 435104242703.715 }, "end": { "local": "1983-10-16T17:41:31+08:00", "utc": "1983-10-16T09:41:31Z", "ms": 435145291488.9284 } }, "covered_min": 242, "window_min": 684, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Daśamī runs from 19:16 on Sat 15 Oct to 21:48 on Sun 16 Oct, and Śravaṇa from 07:19 on Sat 15 Oct to 10:19 on Sun 16 Oct. They are together from 19:16 on Sat 15 Oct to 10:19 on Sun 16 Oct.", "fact": "1983-10-15T11:16:22Z → 1983-10-16T02:19:22Z" }, { "step": "kaala", "text": "The day time is sunrise to sunset: 06:17–17:43 on the 15th, 06:17–17:42 on the 16th.", "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 686 minutes on the 15th and 242 of 684 on the 16th.", "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 5621 s" }, { "step": "ruling", "text": "Vijayā Daśamī, Lu’an, 1983: Sunday 16 October.", "fact": "confidence: determinate" } ], "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": "1983-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-16", "confidence": "determinate" } ], "quote": "In Lu’an, Vijayā Daśamī (Dussehra) 1983 falls on Sunday 16 October. Daśamī runs from 19:16 on Sat 15 Oct to 21:48 on Sun 16 Oct and is with Śravaṇa in the day time that day, for 242 minutes.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-10-17", "festival": "ekadashi", "name": "Pāśāṅkuśā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22070, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-10-16T21:47:51+08:00", "utc": "1983-10-16T13:47:51Z", "ms": 435160071389.24774 }, "end": { "local": "1983-10-18T00:10:59+08:00", "utc": "1983-10-17T16:10:59Z", "ms": 435255059061.5471 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-16T21:47:51+08:00", "utc": "1983-10-16T13:47:51Z", "ms": 435160071389.24774 }, "end": { "local": "1983-10-18T00:10:59+08:00", "utc": "1983-10-17T16:10:59Z", "ms": 435255059061.5471 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-10-17", "window": { "start": { "local": "1983-10-17T06:18:06+08:00", "utc": "1983-10-16T22:18:06Z", "ms": 435190685663.9976 }, "end": { "local": "1983-10-17T06:18:06+08:00", "utc": "1983-10-16T22:18:06Z", "ms": 435190685663.9976 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-10-18", "window": { "start": { "local": "1983-10-18T06:18:49+08:00", "utc": "1983-10-17T22:18:49Z", "ms": 435277128985.7 }, "end": { "local": "1983-10-18T06:18:49+08:00", "utc": "1983-10-17T22:18:49Z", "ms": 435277128985.7 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:48 on Sun 16 Oct to 00:11 on Tue 18 Oct.", "fact": "1983-10-16T13:47:51Z → 1983-10-17T16:10:59Z" }, { "step": "kaala", "text": "Sunrise is at 06:18 on the 17th and 06:19 on the 18th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 17th and is not on the 18th.", "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 22070 s" }, { "step": "ruling", "text": "Pāśāṅkuśā Ekādaśī, Lu’an, 1983: Monday 17 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": "1983-10-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-17", "confidence": "determinate" } ], "quote": "In Lu’an, Pāśāṅkuśā Ekādaśī 1983 falls on Monday 17 October. Ekādaśī runs from 21:48 on Sun 16 Oct to 00:11 on Tue 18 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-10-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-10-19", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24908, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-10-19T02:15:45+08:00", "utc": "1983-10-18T18:15:45Z", "ms": 435348945218.64325 }, "end": { "local": "1983-10-20T03:55:51+08:00", "utc": "1983-10-19T19:55:51Z", "ms": 435441350647.78827 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1983-10-19T02:15:45+08:00", "utc": "1983-10-18T18:15:45Z", "ms": 435348945218.64325 }, "end": { "local": "1983-10-20T03:55:51+08:00", "utc": "1983-10-19T19:55:51Z", "ms": 435441350647.78827 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-10-18", "window": { "start": { "local": "1983-10-18T17:39:15+08:00", "utc": "1983-10-18T09:39:15Z", "ms": 435317955022.01404 }, "end": { "local": "1983-10-18T19:20:37+08:00", "utc": "1983-10-18T11:20:37Z", "ms": 435324037375.86816 } }, "covered_min": 0, "window_min": 101, "qualifies": false }, { "local_date": "1983-10-19", "window": { "start": { "local": "1983-10-19T17:38:08+08:00", "utc": "1983-10-19T09:38:08Z", "ms": 435404287995.5611 }, "end": { "local": "1983-10-19T19:19:45+08:00", "utc": "1983-10-19T11:19:45Z", "ms": 435410385161.7109 } }, "covered_min": 102, "window_min": 102, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:16 on Wed 19 Oct to 03:56 on Thu 20 Oct.", "fact": "1983-10-18T18:15:45Z → 1983-10-19T19:55:51Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:39–19:21 on the 18th, 17:38–19:20 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 0 of 101 minutes on the 18th and 102 of 102 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 24908 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Wednesday 19 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": "1983-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-19", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Wednesday 19 October. Trayodaśī runs from 02:16 on Wed 19 Oct to 03:56 on Thu 20 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-10-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/karaka-chaturthi", "festival": "karaka-chaturthi", "name": "Karaka Caturthī", "everyday": "Karwa Chauth", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31961, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-10-25T05:38:50+08:00", "utc": "1983-10-24T21:38:50Z", "ms": 435879530451.3784 }, "end": { "local": "1983-10-26T04:51:01+08:00", "utc": "1983-10-25T20:51:01Z", "ms": 435963060530.25256 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-10-25T05:38:50+08:00", "utc": "1983-10-24T21:38:50Z", "ms": 435879530451.3784 }, "end": { "local": "1983-10-26T04:51:01+08:00", "utc": "1983-10-25T20:51:01Z", "ms": 435963060530.25256 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-10-24", "window": { "start": { "local": "1983-10-24T19:14:56+08:00", "utc": "1983-10-24T11:14:56Z", "ms": 435842095700.7717 }, "end": { "local": "1983-10-24T19:14:56+08:00", "utc": "1983-10-24T11:14:56Z", "ms": 435842095700.7717 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-10-25", "window": { "start": { "local": "1983-10-25T19:58:20+08:00", "utc": "1983-10-25T11:58:20Z", "ms": 435931099889.0006 }, "end": { "local": "1983-10-25T19:58:20+08:00", "utc": "1983-10-25T11:58:20Z", "ms": 435931099889.0006 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:39 on Tue 25 Oct to 04:51 on Wed 26 Oct.", "fact": "1983-10-24T21:38:50Z → 1983-10-25T20:51:01Z" }, { "step": "kaala", "text": "Moonrise is at 19:15 on the 24th and 19:58 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. 104" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 31961 s" }, { "step": "ruling", "text": "Karaka Caturthī, Lu’an, 1983: Tuesday 25 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": "1983-10-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-25", "confidence": "determinate" } ], "quote": "In Lu’an, Karaka Caturthī (Karwa Chauth) 1983 falls on Tuesday 25 October. Caturthī runs from 05:39 on Tue 25 Oct to 04:51 on Wed 26 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-10-25", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31961, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-10-25T05:38:50+08:00", "utc": "1983-10-24T21:38:50Z", "ms": 435879530451.3784 }, "end": { "local": "1983-10-26T04:51:01+08:00", "utc": "1983-10-25T20:51:01Z", "ms": 435963060530.25256 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-10-25T05:38:50+08:00", "utc": "1983-10-24T21:38:50Z", "ms": 435879530451.3784 }, "end": { "local": "1983-10-26T04:51:01+08:00", "utc": "1983-10-25T20:51:01Z", "ms": 435963060530.25256 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-10-24", "window": { "start": { "local": "1983-10-24T19:14:56+08:00", "utc": "1983-10-24T11:14:56Z", "ms": 435842095700.7717 }, "end": { "local": "1983-10-24T19:14:56+08:00", "utc": "1983-10-24T11:14:56Z", "ms": 435842095700.7717 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-10-25", "window": { "start": { "local": "1983-10-25T19:58:20+08:00", "utc": "1983-10-25T11:58:20Z", "ms": 435931099889.0006 }, "end": { "local": "1983-10-25T19:58:20+08:00", "utc": "1983-10-25T11:58:20Z", "ms": 435931099889.0006 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:39 on Tue 25 Oct to 04:51 on Wed 26 Oct.", "fact": "1983-10-24T21:38:50Z → 1983-10-25T20:51:01Z" }, { "step": "kaala", "text": "Moonrise is at 19:15 on the 24th and 19:58 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 31961 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Tuesday 25 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": "1983-10-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-25", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Tuesday 25 October. Caturthī runs from 05:39 on Tue 25 Oct to 04:51 on Wed 26 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-10-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ahoyi-ashtami", "festival": "ahoyi-ashtami", "name": "Ahoyī Aṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-10-28", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 4864, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-10-29T00:34:50+08:00", "utc": "1983-10-28T16:34:50Z", "ms": 436206890251.9052 }, "end": { "local": "1983-10-29T22:34:45+08:00", "utc": "1983-10-29T14:34:45Z", "ms": 436286084803.43445 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-10-29T00:34:50+08:00", "utc": "1983-10-28T16:34:50Z", "ms": 436206890251.9052 }, "end": { "local": "1983-10-29T22:34:45+08:00", "utc": "1983-10-29T14:34:45Z", "ms": 436286084803.43445 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-10-28", "window": { "start": { "local": "1983-10-28T22:48:55+08:00", "utc": "1983-10-28T14:48:55Z", "ms": 436200535023.3346 }, "end": { "local": "1983-10-28T22:48:55+08:00", "utc": "1983-10-28T14:48:55Z", "ms": 436200535023.3346 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-10-29", "window": { "start": { "local": "1983-10-29T23:55:49+08:00", "utc": "1983-10-29T15:55:49Z", "ms": 436290948752.44385 }, "end": { "local": "1983-10-29T23:55:49+08:00", "utc": "1983-10-29T15:55:49Z", "ms": 436290948752.44385 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 00:35 on Sat 29 Oct to 22:35 on Sat 29 Oct.", "fact": "1983-10-28T16:34:50Z → 1983-10-29T14:34:45Z" }, { "step": "kaala", "text": "Moonrise is at 22:49 on the 28th and 23:56 on the 29th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is not on the 28th and is not on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Neither moonrise qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 4864 s" }, { "step": "ruling", "text": "Ahoyī Aṣṭamī, Lu’an, 1983: Friday 28 October.", "fact": "confidence: boundary (absent-unstated)" } ], "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": "1983-10-28", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-10-28", "confidence": "boundary" } ], "quote": "In Lu’an, Ahoyī Aṣṭamī 1983 falls on Friday 28 October. Aṣṭamī runs from 00:35 on Sat 29 Oct to 22:35 on Sat 29 Oct, and is current at moonrise on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-11-01", "festival": "ekadashi", "name": "Ramā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31949, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-10-31T17:54:22+08:00", "utc": "1983-10-31T09:54:22Z", "ms": 436442062017.9796 }, "end": { "local": "1983-11-01T15:22:06+08:00", "utc": "1983-11-01T07:22:06Z", "ms": 436519326159.92096 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-10-31T17:54:22+08:00", "utc": "1983-10-31T09:54:22Z", "ms": 436442062017.9796 }, "end": { "local": "1983-11-01T15:22:06+08:00", "utc": "1983-11-01T07:22:06Z", "ms": 436519326159.92096 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-10-31", "window": { "start": { "local": "1983-10-31T06:28:48+08:00", "utc": "1983-10-30T22:28:48Z", "ms": 436400927784.1604 }, "end": { "local": "1983-10-31T06:28:48+08:00", "utc": "1983-10-30T22:28:48Z", "ms": 436400927784.1604 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-11-01", "window": { "start": { "local": "1983-11-01T06:29:37+08:00", "utc": "1983-10-31T22:29:37Z", "ms": 436487376664.2548 }, "end": { "local": "1983-11-01T06:29:37+08:00", "utc": "1983-10-31T22:29:37Z", "ms": 436487376664.2548 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 17:54 on Mon 31 Oct to 15:22 on Tue 1 Nov.", "fact": "1983-10-31T09:54:22Z → 1983-11-01T07:22:06Z" }, { "step": "kaala", "text": "Sunrise is at 06:29 on the 31st and 06:30 on the 1st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 31st and is on the 1st.", "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 31949 s" }, { "step": "ruling", "text": "Ramā Ekādaśī, Lu’an, 1983: Tuesday 1 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": "1983-11-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-01", "confidence": "determinate" } ], "quote": "In Lu’an, Ramā Ekādaśī 1983 falls on Tuesday 1 November. Ekādaśī runs from 17:54 on Mon 31 Oct to 15:22 on Tue 1 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-11-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/govatsa-dvadashi", "festival": "govatsa-dvadashi", "name": "Govatsa Dvādaśī", "everyday": "Vasu Baras", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7379, "anga": { "type": "tithi", "index": 26, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1983-11-01T15:22:06+08:00", "utc": "1983-11-01T07:22:06Z", "ms": 436519326159.92096 }, "end": { "local": "1983-11-02T12:49:19+08:00", "utc": "1983-11-02T04:49:19Z", "ms": 436596558680.7006 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-01T15:22:06+08:00", "utc": "1983-11-01T07:22:06Z", "ms": 436519326159.92096 }, "end": { "local": "1983-11-02T12:49:19+08:00", "utc": "1983-11-02T04:49:19Z", "ms": 436596558680.7006 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-11-01", "window": { "start": { "local": "1983-11-01T17:25:05+08:00", "utc": "1983-11-01T09:25:05Z", "ms": 436526705228.79095 }, "end": { "local": "1983-11-01T19:09:48+08:00", "utc": "1983-11-01T11:09:48Z", "ms": 436532987988.17474 } }, "covered_min": 105, "window_min": 105, "qualifies": true }, { "local_date": "1983-11-02", "window": { "start": { "local": "1983-11-02T17:24:13+08:00", "utc": "1983-11-02T09:24:13Z", "ms": 436613052911.84143 }, "end": { "local": "1983-11-02T19:09:09+08:00", "utc": "1983-11-02T11:09:09Z", "ms": 436619349263.64404 } }, "covered_min": 0, "window_min": 105, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 15:22 on Tue 1 Nov to 12:49 on Wed 2 Nov.", "fact": "1983-11-01T07:22:06Z → 1983-11-02T04:49:19Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:25–19:10 on the 1st, 17:24–19:09 on the 2nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during pradoṣa. It covers 105 of 105 minutes on the 1st and 0 of 105 on the 2nd.", "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 7379 s" }, { "step": "ruling", "text": "Govatsa Dvādaśī, Lu’an, 1983: Tuesday 1 November.", "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": "1983-11-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-01", "confidence": "determinate" } ], "quote": "In Lu’an, Govatsa Dvādaśī (Vasu Baras) 1983 falls on Tuesday 1 November. Dvādaśī runs from 15:22 on Tue 1 Nov to 12:49 on Wed 2 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/yama-dipadana", "festival": "yama-dipadana", "name": "Yama Dīpadāna", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16494, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-11-02T12:49:19+08:00", "utc": "1983-11-02T04:49:19Z", "ms": 436596558680.7006 }, "end": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-02T12:49:19+08:00", "utc": "1983-11-02T04:49:19Z", "ms": 436596558680.7006 }, "end": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-11-02", "window": { "start": { "local": "1983-11-02T17:24:13+08:00", "utc": "1983-11-02T09:24:13Z", "ms": 436613052911.84143 }, "end": { "local": "1983-11-02T19:09:09+08:00", "utc": "1983-11-02T11:09:09Z", "ms": 436619349263.64404 } }, "covered_min": 105, "window_min": 105, "qualifies": true }, { "local_date": "1983-11-03", "window": { "start": { "local": "1983-11-03T17:23:22+08:00", "utc": "1983-11-03T09:23:22Z", "ms": 436699401865.17377 }, "end": { "local": "1983-11-03T19:08:32+08:00", "utc": "1983-11-03T11:08:32Z", "ms": 436705711686.80963 } }, "covered_min": 0, "window_min": 105, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 12:49 on Wed 2 Nov to 10:23 on Thu 3 Nov.", "fact": "1983-11-02T04:49:19Z → 1983-11-03T02:23:01Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:24–19:09 on the 2nd, 17:23–19:09 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 105 of 105 minutes on the 2nd and 0 of 105 on the 3rd.", "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 16494 s" }, { "step": "ruling", "text": "Yama Dīpadāna, Lu’an, 1983: Wednesday 2 November.", "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": "1983-11-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-02", "confidence": "determinate" } ], "quote": "In Lu’an, Yama Dīpadāna 1983 falls on Wednesday 2 November. Trayodaśī runs from 12:49 on Wed 2 Nov to 10:23 on Thu 3 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/pradosha-vrata?on=1983-11-02", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16494, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-11-02T12:49:19+08:00", "utc": "1983-11-02T04:49:19Z", "ms": 436596558680.7006 }, "end": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-02T12:49:19+08:00", "utc": "1983-11-02T04:49:19Z", "ms": 436596558680.7006 }, "end": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-11-02", "window": { "start": { "local": "1983-11-02T17:24:13+08:00", "utc": "1983-11-02T09:24:13Z", "ms": 436613052911.84143 }, "end": { "local": "1983-11-02T19:09:09+08:00", "utc": "1983-11-02T11:09:09Z", "ms": 436619349263.64404 } }, "covered_min": 105, "window_min": 105, "qualifies": true }, { "local_date": "1983-11-03", "window": { "start": { "local": "1983-11-03T17:23:22+08:00", "utc": "1983-11-03T09:23:22Z", "ms": 436699401865.17377 }, "end": { "local": "1983-11-03T19:08:32+08:00", "utc": "1983-11-03T11:08:32Z", "ms": 436705711686.80963 } }, "covered_min": 0, "window_min": 105, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 12:49 on Wed 2 Nov to 10:23 on Thu 3 Nov.", "fact": "1983-11-02T04:49:19Z → 1983-11-03T02:23:01Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:24–19:09 on the 2nd, 17:23–19:09 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 105 of 105 minutes on the 2nd and 0 of 105 on the 3rd.", "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 16494 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Wednesday 2 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": "1983-11-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-02", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Wednesday 2 November. Trayodaśī runs from 12:49 on Wed 2 Nov to 10:23 on Thu 3 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-11-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-11-03", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28153, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 }, "end": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 }, "end": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 } }, "kaala": "nishita", "days": [ { "local_date": "1983-11-02", "window": { "start": { "local": "1983-11-02T23:33:44+08:00", "utc": "1983-11-02T15:33:44Z", "ms": 436635224231.1012 }, "end": { "local": "1983-11-03T00:21:44+08:00", "utc": "1983-11-02T16:21:44Z", "ms": 436638104231.1012 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-11-03", "window": { "start": { "local": "1983-11-03T23:33:44+08:00", "utc": "1983-11-03T15:33:44Z", "ms": 436721623696.3082 }, "end": { "local": "1983-11-04T00:21:44+08:00", "utc": "1983-11-03T16:21:44Z", "ms": 436724503696.3082 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:23 on Thu 3 Nov to 08:11 on Fri 4 Nov.", "fact": "1983-11-03T02:23:01Z → 1983-11-04T00:10:57Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:34–00:22 on the 2nd, 23:34–00:22 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 28153 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Thursday 3 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": "1983-11-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-03", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Thursday 3 November. Caturdaśī runs from 10:23 on Thu 3 Nov to 08:11 on Fri 4 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-11-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/naraka-chaturdashi", "festival": "naraka-chaturdashi", "name": "Naraka Caturdaśī", "everyday": "Choti Diwali", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5932, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 }, "end": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-03T10:23:01+08:00", "utc": "1983-11-03T02:23:01Z", "ms": 436674180888.4357 }, "end": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 } }, "kaala": "arunodaya", "days": [ { "local_date": "1983-11-03", "window": { "start": { "local": "1983-11-03T04:46:19+08:00", "utc": "1983-11-02T20:46:19Z", "ms": 436653979198.55835 }, "end": { "local": "1983-11-03T06:31:16+08:00", "utc": "1983-11-02T22:31:16Z", "ms": 436660275550.36096 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1983-11-04", "window": { "start": { "local": "1983-11-04T04:46:56+08:00", "utc": "1983-11-03T20:46:56Z", "ms": 436740415705.8069 }, "end": { "local": "1983-11-04T06:32:06+08:00", "utc": "1983-11-03T22:32:06Z", "ms": 436746725527.44275 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:23 on Thu 3 Nov to 08:11 on Fri 4 Nov.", "fact": "1983-11-03T02:23:01Z → 1983-11-04T00:10:57Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 04:46–06:31 on the 3rd, 04:47–06:32 on the 4th.", "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 0 of 105 minutes on the 3rd and 105 of 105 on the 4th.", "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 5932 s" }, { "step": "ruling", "text": "Naraka Caturdaśī, Lu’an, 1983: Friday 4 November.", "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": "1983-11-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-04", "confidence": "determinate" } ], "quote": "In Lu’an, Naraka Caturdaśī (Choti Diwali) 1983 falls on Friday 4 November. Caturdaśī runs from 10:23 on Thu 3 Nov to 08:11 on Fri 4 Nov and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/diwali-lakshmi-puja", "festival": "diwali-lakshmi-puja", "name": "Lakṣmī Pūjā", "everyday": "Diwali", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33095, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 }, "end": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 }, "end": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-11-04", "window": { "start": { "local": "1983-11-04T17:22:32+08:00", "utc": "1983-11-04T09:22:32Z", "ms": 436785752113.4239 }, "end": { "local": "1983-11-04T19:07:55+08:00", "utc": "1983-11-04T11:07:55Z", "ms": 436792075276.7309 } }, "covered_min": 105, "window_min": 105, "qualifies": true }, { "local_date": "1983-11-05", "window": { "start": { "local": "1983-11-05T17:21:44+08:00", "utc": "1983-11-05T09:21:44Z", "ms": 436872103680.6154 }, "end": { "local": "1983-11-05T19:07:20+08:00", "utc": "1983-11-05T11:07:20Z", "ms": 436878440051.7345 } }, "covered_min": 0, "window_min": 106, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 08:11 on Fri 4 Nov to 06:21 on Sat 5 Nov.", "fact": "1983-11-04T00:10:57Z → 1983-11-04T22:21:07Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:23–19:08 on the 4th, 17:22–19:07 on the 5th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during pradoṣa. It covers 105 of 105 minutes on the 4th and 0 of 106 on the 5th.", "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 33095 s" }, { "step": "ruling", "text": "Lakṣmī Pūjā, Lu’an, 1983: Friday 4 November.", "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": "1983-11-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-04", "confidence": "determinate" } ], "quote": "In Lu’an, Lakṣmī Pūjā (Diwali) 1983 falls on Friday 4 November. Amāvasyā runs from 08:11 on Fri 4 Nov to 06:21 on Sat 5 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/kali-puja", "festival": "kali-puja", "name": "Kālī Pūjā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21563, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 }, "end": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-04T08:10:57+08:00", "utc": "1983-11-04T00:10:57Z", "ms": 436752657083.8182 }, "end": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 } }, "kaala": "nishita", "days": [ { "local_date": "1983-11-03", "window": { "start": { "local": "1983-11-03T23:33:44+08:00", "utc": "1983-11-03T15:33:44Z", "ms": 436721623696.3082 }, "end": { "local": "1983-11-04T00:21:44+08:00", "utc": "1983-11-03T16:21:44Z", "ms": 436724503696.3082 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-11-04", "window": { "start": { "local": "1983-11-04T23:33:44+08:00", "utc": "1983-11-04T15:33:44Z", "ms": 436808023975.8252 }, "end": { "local": "1983-11-05T00:21:44+08:00", "utc": "1983-11-04T16:21:44Z", "ms": 436810903975.8252 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 08:11 on Fri 4 Nov to 06:21 on Sat 5 Nov.", "fact": "1983-11-04T00:10:57Z → 1983-11-04T22:21:07Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:34–00:22 on the 3rd, 23:34–00:22 on the 4th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 21563 s" }, { "step": "ruling", "text": "Kālī Pūjā, Lu’an, 1983: Friday 4 November.", "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": "1983-11-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-04", "confidence": "determinate" } ], "quote": "In Lu’an, Kālī Pūjā 1983 falls on Friday 4 November. Amāvasyā runs from 08:11 on Fri 4 Nov to 06:21 on Sat 5 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/govardhana-puja", "festival": "govardhana-puja", "name": "Govardhana Pūjā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18733, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "end": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "end": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-05", "window": { "start": { "local": "1983-11-05T11:33:20+08:00", "utc": "1983-11-05T03:33:20Z", "ms": 436851199759.42096 }, "end": { "local": "1983-11-05T12:21:20+08:00", "utc": "1983-11-05T04:21:20Z", "ms": 436854079759.42096 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-11-06", "window": { "start": { "local": "1983-11-06T11:33:22+08:00", "utc": "1983-11-06T03:33:22Z", "ms": 436937601527.2633 }, "end": { "local": "1983-11-06T12:21:22+08:00", "utc": "1983-11-06T04:21:22Z", "ms": 436940481527.2633 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 06:21 on Sat 5 Nov to 05:01 on Sun 6 Nov.", "fact": "1983-11-04T22:21:07Z → 1983-11-05T21:01:11Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:33–12:21 on the 5th, 11:33–12:21 on the 6th.", "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 5th and 0 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 18733 s" }, { "step": "ruling", "text": "Govardhana Pūjā, Lu’an, 1983: Saturday 5 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": "1983-11-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-05", "confidence": "determinate" } ], "quote": "In Lu’an, Govardhana Pūjā 1983 falls on Saturday 5 November. Pratipadā runs from 06:21 on Sat 5 Nov to 05:01 on Sun 6 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/bali-puja", "festival": "bali-puja", "name": "Bali Pūjā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35631, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "end": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "end": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-11-04", "window": { "start": { "local": "1983-11-04T17:22:32+08:00", "utc": "1983-11-04T09:22:32Z", "ms": 436785752113.4239 }, "end": { "local": "1983-11-04T19:07:55+08:00", "utc": "1983-11-04T11:07:55Z", "ms": 436792075276.7309 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1983-11-05", "window": { "start": { "local": "1983-11-05T17:21:44+08:00", "utc": "1983-11-05T09:21:44Z", "ms": 436872103680.6154 }, "end": { "local": "1983-11-05T19:07:20+08:00", "utc": "1983-11-05T11:07:20Z", "ms": 436878440051.7345 } }, "covered_min": 106, "window_min": 106, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 06:21 on Sat 5 Nov to 05:01 on Sun 6 Nov.", "fact": "1983-11-04T22:21:07Z → 1983-11-05T21:01:11Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:23–19:08 on the 4th, 17:22–19:07 on the 5th.", "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 105 minutes on the 4th and 106 of 106 on the 5th.", "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 35631 s" }, { "step": "ruling", "text": "Bali Pūjā, Lu’an, 1983: Saturday 5 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": "1983-11-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-05", "confidence": "determinate" } ], "quote": "In Lu’an, Bali Pūjā 1983 falls on Saturday 5 November. Pratipadā runs from 06:21 on Sat 5 Nov to 05:01 on Sun 6 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/dyuta-pratipad", "festival": "dyuta-pratipad", "name": "Dyūta Pratipad", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 709, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "end": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-05T06:21:07+08:00", "utc": "1983-11-04T22:21:07Z", "ms": 436832467048.85187 }, "end": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 } }, "kaala": "purvahna", "days": [ { "local_date": "1983-11-05", "window": { "start": { "local": "1983-11-05T06:32:56+08:00", "utc": "1983-11-04T22:32:56Z", "ms": 436833175838.2265 }, "end": { "local": "1983-11-05T10:09:12+08:00", "utc": "1983-11-05T02:09:12Z", "ms": 436846151785.68945 } }, "covered_min": 216, "window_min": 216, "qualifies": true }, { "local_date": "1983-11-06", "window": { "start": { "local": "1983-11-06T06:33:46+08:00", "utc": "1983-11-05T22:33:46Z", "ms": 436919626464.00854 }, "end": { "local": "1983-11-06T10:09:30+08:00", "utc": "1983-11-06T02:09:30Z", "ms": 436932569839.5117 } }, "covered_min": 0, "window_min": 216, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 06:21 on Sat 5 Nov to 05:01 on Sun 6 Nov.", "fact": "1983-11-04T22:21:07Z → 1983-11-05T21:01:11Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:33–10:09 on the 5th, 06:34–10:09 on the 6th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pūrvāhṇa. It covers 216 of 216 minutes on the 5th and 0 of 216 on the 6th.", "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 709 s" }, { "step": "ruling", "text": "Dyūta Pratipad, Lu’an, 1983: Saturday 5 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": "1983-11-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-05", "confidence": "determinate" } ], "quote": "In Lu’an, Dyūta Pratipad 1983 falls on Saturday 5 November. Pratipadā runs from 06:21 on Sat 5 Nov to 05:01 on Sun 6 Nov and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/yama-dvitiya", "festival": "yama-dvitiya", "name": "Yama Dvitīyā", "everyday": "Bhai Dooj", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23531, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 }, "end": { "local": "1983-11-07T04:17:46+08:00", "utc": "1983-11-06T20:17:46Z", "ms": 436997865511.1991 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-06T05:01:11+08:00", "utc": "1983-11-05T21:01:11Z", "ms": 436914070970.73346 }, "end": { "local": "1983-11-07T04:17:46+08:00", "utc": "1983-11-06T20:17:46Z", "ms": 436997865511.1991 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-06", "window": { "start": { "local": "1983-11-06T11:33:22+08:00", "utc": "1983-11-06T03:33:22Z", "ms": 436937601527.2633 }, "end": { "local": "1983-11-06T12:21:22+08:00", "utc": "1983-11-06T04:21:22Z", "ms": 436940481527.2633 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-11-07", "window": { "start": { "local": "1983-11-07T11:33:24+08:00", "utc": "1983-11-07T03:33:24Z", "ms": 437024004125.92334 }, "end": { "local": "1983-11-07T12:21:24+08:00", "utc": "1983-11-07T04:21:24Z", "ms": 437026884125.92334 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 05:01 on Sun 6 Nov to 04:18 on Mon 7 Nov.", "fact": "1983-11-05T21:01:11Z → 1983-11-06T20:17:46Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:33–12:21 on the 6th, 11:33–12:21 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 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. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 23531 s" }, { "step": "ruling", "text": "Yama Dvitīyā, Lu’an, 1983: Sunday 6 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": "1983-11-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-06", "confidence": "determinate" } ], "quote": "In Lu’an, Yama Dvitīyā (Bhai Dooj) 1983 falls on Sunday 6 November. Dvitīyā runs from 05:01 on Sun 6 Nov to 04:18 on Mon 7 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/naga-chaturthi", "festival": "naga-chaturthi", "name": "Nāga Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23839, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-11-08T04:15:31+08:00", "utc": "1983-11-07T20:15:31Z", "ms": 437084130864.046 }, "end": { "local": "1983-11-09T04:56:12+08:00", "utc": "1983-11-08T20:56:12Z", "ms": 437172972461.87067 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-08T04:15:31+08:00", "utc": "1983-11-07T20:15:31Z", "ms": 437084130864.046 }, "end": { "local": "1983-11-09T04:56:12+08:00", "utc": "1983-11-08T20:56:12Z", "ms": 437172972461.87067 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-08", "window": { "start": { "local": "1983-11-08T11:33:28+08:00", "utc": "1983-11-08T03:33:28Z", "ms": 437110407557.0292 }, "end": { "local": "1983-11-08T12:21:28+08:00", "utc": "1983-11-08T04:21:28Z", "ms": 437113287557.0292 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-11-09", "window": { "start": { "local": "1983-11-09T11:33:32+08:00", "utc": "1983-11-09T03:33:32Z", "ms": 437196811822.00195 }, "end": { "local": "1983-11-09T12:21:32+08:00", "utc": "1983-11-09T04:21:32Z", "ms": 437199691822.00195 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 04:16 on Tue 8 Nov to 04:56 on Wed 9 Nov.", "fact": "1983-11-07T20:15:31Z → 1983-11-08T20:56:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:33–12:21 on the 8th, 11:34–12:22 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 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: paraviddha → only-day · margin 23839 s" }, { "step": "ruling", "text": "Nāga Caturthī, Lu’an, 1983: Tuesday 8 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": "1983-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-08", "confidence": "determinate" } ], "quote": "In Lu’an, Nāga Caturthī 1983 falls on Tuesday 8 November. Caturthī runs from 04:16 on Tue 8 Nov to 04:56 on Wed 9 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-11-08", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23839, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-11-08T04:15:31+08:00", "utc": "1983-11-07T20:15:31Z", "ms": 437084130864.046 }, "end": { "local": "1983-11-09T04:56:12+08:00", "utc": "1983-11-08T20:56:12Z", "ms": 437172972461.87067 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-08T04:15:31+08:00", "utc": "1983-11-07T20:15:31Z", "ms": 437084130864.046 }, "end": { "local": "1983-11-09T04:56:12+08:00", "utc": "1983-11-08T20:56:12Z", "ms": 437172972461.87067 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-08", "window": { "start": { "local": "1983-11-08T11:33:28+08:00", "utc": "1983-11-08T03:33:28Z", "ms": 437110407557.0292 }, "end": { "local": "1983-11-08T12:21:28+08:00", "utc": "1983-11-08T04:21:28Z", "ms": 437113287557.0292 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-11-09", "window": { "start": { "local": "1983-11-09T11:33:32+08:00", "utc": "1983-11-09T03:33:32Z", "ms": 437196811822.00195 }, "end": { "local": "1983-11-09T12:21:32+08:00", "utc": "1983-11-09T04:21:32Z", "ms": 437199691822.00195 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 04:16 on Tue 8 Nov to 04:56 on Wed 9 Nov.", "fact": "1983-11-07T20:15:31Z → 1983-11-08T20:56:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:33–12:21 on the 8th, 11:34–12:22 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 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. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 23839 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Tuesday 8 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": "1983-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-08", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Tuesday 8 November. Caturthī runs from 04:16 on Tue 8 Nov to 04:56 on Wed 9 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-11-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/surya-shashthi", "festival": "surya-shashthi", "name": "Sūrya Ṣaṣṭhī", "everyday": "Chhath", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11988, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-11-10T06:17:48+08:00", "utc": "1983-11-09T22:17:48Z", "ms": 437264267666.62695 }, "end": { "local": "1983-11-11T08:13:55+08:00", "utc": "1983-11-11T00:13:55Z", "ms": 437357635249.7106 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-10T06:17:48+08:00", "utc": "1983-11-09T22:17:48Z", "ms": 437264267666.62695 }, "end": { "local": "1983-11-11T08:13:55+08:00", "utc": "1983-11-11T00:13:55Z", "ms": 437357635249.7106 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-10", "window": { "start": { "local": "1983-11-10T11:33:37+08:00", "utc": "1983-11-10T03:33:37Z", "ms": 437283216922.0779 }, "end": { "local": "1983-11-10T12:21:37+08:00", "utc": "1983-11-10T04:21:37Z", "ms": 437286096922.0779 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-11-11", "window": { "start": { "local": "1983-11-11T11:33:43+08:00", "utc": "1983-11-11T03:33:43Z", "ms": 437369622858.25745 }, "end": { "local": "1983-11-11T12:21:43+08:00", "utc": "1983-11-11T04:21:43Z", "ms": 437372502858.25745 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 06:18 on Thu 10 Nov to 08:14 on Fri 11 Nov.", "fact": "1983-11-09T22:17:48Z → 1983-11-11T00:13:55Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 10th, 11:34–12:22 on the 11th.", "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 10th and 0 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: unstated → only-day · margin 11988 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī, Lu’an, 1983: Thursday 10 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": "1983-11-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-10", "confidence": "determinate" } ], "quote": "In Lu’an, Sūrya Ṣaṣṭhī (Chhath) 1983 falls on Thursday 10 November. Ṣaṣṭhī runs from 06:18 on Thu 10 Nov to 08:14 on Fri 11 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/gopashtami", "festival": "gopashtami", "name": "Gopāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-12", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 2586, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1983-11-12T10:34:08+08:00", "utc": "1983-11-12T02:34:08Z", "ms": 437452448327.4031 }, "end": { "local": "1983-11-13T13:05:03+08:00", "utc": "1983-11-13T05:05:03Z", "ms": 437547902975.1497 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-12T10:34:08+08:00", "utc": "1983-11-12T02:34:08Z", "ms": 437452448327.4031 }, "end": { "local": "1983-11-13T13:05:03+08:00", "utc": "1983-11-13T05:05:03Z", "ms": 437547902975.1497 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-12", "window": { "start": { "local": "1983-11-12T11:33:50+08:00", "utc": "1983-11-12T03:33:50Z", "ms": 437456029631.2186 }, "end": { "local": "1983-11-12T12:21:50+08:00", "utc": "1983-11-12T04:21:50Z", "ms": 437458909631.2186 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-11-13", "window": { "start": { "local": "1983-11-13T11:33:57+08:00", "utc": "1983-11-13T03:33:57Z", "ms": 437542437241.23114 }, "end": { "local": "1983-11-13T12:21:57+08:00", "utc": "1983-11-13T04:21:57Z", "ms": 437545317241.23114 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 10:34 on Sat 12 Nov to 13:05 on Sun 13 Nov.", "fact": "1983-11-12T02:34:08Z → 1983-11-13T05:05:03Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 12th, 11:34–12:22 on the 13th.", "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 12th and 48 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 2586 s" }, { "step": "ruling", "text": "Gopāṣṭamī, Lu’an, 1983: Saturday 12 November.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "1983-11-12", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-12", "confidence": "boundary" } ], "quote": "In Lu’an, Gopāṣṭamī 1983 falls on Saturday 12 November. Aṣṭamī runs from 10:34 on Sat 12 Nov to 13:05 on Sun 13 Nov and covers all of madhyāhna that midday. It also reaches the next midday for 48 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/akshaya-navami", "festival": "akshaya-navami", "name": "Akṣaya Navamī", "everyday": "Amla Navami", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10389, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1983-11-13T13:05:03+08:00", "utc": "1983-11-13T05:05:03Z", "ms": 437547902975.1497 }, "end": { "local": "1983-11-14T15:32:14+08:00", "utc": "1983-11-14T07:32:14Z", "ms": 437643133883.8906 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-13T13:05:03+08:00", "utc": "1983-11-13T05:05:03Z", "ms": 437547902975.1497 }, "end": { "local": "1983-11-14T15:32:14+08:00", "utc": "1983-11-14T07:32:14Z", "ms": 437643133883.8906 } }, "kaala": "purvahna", "days": [ { "local_date": "1983-11-13", "window": { "start": { "local": "1983-11-13T06:39:48+08:00", "utc": "1983-11-12T22:39:48Z", "ms": 437524787909.12885 }, "end": { "local": "1983-11-13T10:11:54+08:00", "utc": "1983-11-13T02:11:54Z", "ms": 437537514130.5304 } }, "covered_min": 0, "window_min": 212, "qualifies": false }, { "local_date": "1983-11-14", "window": { "start": { "local": "1983-11-14T06:40:40+08:00", "utc": "1983-11-13T22:40:40Z", "ms": 437611240285.9349 }, "end": { "local": "1983-11-14T10:12:17+08:00", "utc": "1983-11-14T02:12:17Z", "ms": 437623937220.7062 } }, "covered_min": 212, "window_min": 212, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 13:05 on Sun 13 Nov to 15:32 on Mon 14 Nov.", "fact": "1983-11-13T05:05:03Z → 1983-11-14T07:32:14Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:40–10:12 on the 13th, 06:41–10:12 on the 14th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during pūrvāhṇa. It covers 0 of 212 minutes on the 13th and 212 of 212 on the 14th.", "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 10389 s" }, { "step": "ruling", "text": "Akṣaya Navamī, Lu’an, 1983: Monday 14 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": "1983-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-14", "confidence": "determinate" } ], "quote": "In Lu’an, Akṣaya Navamī (Amla Navami) 1983 falls on Monday 14 November. Navamī runs from 13:05 on Sun 13 Nov to 15:32 on Mon 14 Nov and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/durga-navami", "festival": "durga-navami", "name": "Durgā Navamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2586, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1983-11-13T13:05:03+08:00", "utc": "1983-11-13T05:05:03Z", "ms": 437547902975.1497 }, "end": { "local": "1983-11-14T15:32:14+08:00", "utc": "1983-11-14T07:32:14Z", "ms": 437643133883.8906 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-13T13:05:03+08:00", "utc": "1983-11-13T05:05:03Z", "ms": 437547902975.1497 }, "end": { "local": "1983-11-14T15:32:14+08:00", "utc": "1983-11-14T07:32:14Z", "ms": 437643133883.8906 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-13", "window": { "start": { "local": "1983-11-13T11:33:57+08:00", "utc": "1983-11-13T03:33:57Z", "ms": 437542437241.23114 }, "end": { "local": "1983-11-13T12:21:57+08:00", "utc": "1983-11-13T04:21:57Z", "ms": 437545317241.23114 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-11-14", "window": { "start": { "local": "1983-11-14T11:34:06+08:00", "utc": "1983-11-14T03:34:06Z", "ms": 437628845688.09186 }, "end": { "local": "1983-11-14T12:22:06+08:00", "utc": "1983-11-14T04:22:06Z", "ms": 437631725688.09186 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 13:05 on Sun 13 Nov to 15:32 on Mon 14 Nov.", "fact": "1983-11-13T05:05:03Z → 1983-11-14T07:32:14Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 13th, 11:34–12:22 on the 14th.", "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 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: purvaviddha → only-day · margin 2586 s" }, { "step": "ruling", "text": "Durgā Navamī, Lu’an, 1983: Monday 14 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": "1983-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-14", "confidence": "boundary" } ], "quote": "In Lu’an, Durgā Navamī 1983 falls on Monday 14 November. Navamī runs from 13:05 on Sun 13 Nov to 15:32 on Mon 14 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-11-16", "festival": "ekadashi", "name": "Prabodhinī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 39653, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-11-15T17:42:26+08:00", "utc": "1983-11-15T09:42:26Z", "ms": 437737345567.63806 }, "end": { "local": "1983-11-16T19:25:19+08:00", "utc": "1983-11-16T11:25:19Z", "ms": 437829919238.9149 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-15T17:42:26+08:00", "utc": "1983-11-15T09:42:26Z", "ms": 437737345567.63806 }, "end": { "local": "1983-11-16T19:25:19+08:00", "utc": "1983-11-16T11:25:19Z", "ms": 437829919238.9149 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-11-15", "window": { "start": { "local": "1983-11-15T06:41:33+08:00", "utc": "1983-11-14T22:41:33Z", "ms": 437697692777.3034 }, "end": { "local": "1983-11-15T06:41:33+08:00", "utc": "1983-11-14T22:41:33Z", "ms": 437697692777.3034 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-11-16", "window": { "start": { "local": "1983-11-16T06:42:25+08:00", "utc": "1983-11-15T22:42:25Z", "ms": 437784145358.1526 }, "end": { "local": "1983-11-16T06:42:25+08:00", "utc": "1983-11-15T22:42:25Z", "ms": 437784145358.1526 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 17:42 on Tue 15 Nov to 19:25 on Wed 16 Nov.", "fact": "1983-11-15T09:42:26Z → 1983-11-16T11:25:19Z" }, { "step": "kaala", "text": "Sunrise is at 06:42 on the 15th and 06:42 on the 16th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 15th and is on the 16th.", "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 39653 s" }, { "step": "ruling", "text": "Prabodhinī Ekādaśī, Lu’an, 1983: Wednesday 16 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": "1983-11-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-16", "confidence": "determinate" } ], "quote": "In Lu’an, Prabodhinī Ekādaśī 1983 falls on Wednesday 16 November. Ekādaśī runs from 17:42 on Tue 15 Nov to 19:25 on Wed 16 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-11-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-11-18", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5552, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-11-17T20:34:28+08:00", "utc": "1983-11-17T12:34:28Z", "ms": 437920468352.71204 }, "end": { "local": "1983-11-18T21:07:20+08:00", "utc": "1983-11-18T13:07:20Z", "ms": 438008839774.3123 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-17T20:34:28+08:00", "utc": "1983-11-17T12:34:28Z", "ms": 437920468352.71204 }, "end": { "local": "1983-11-18T21:07:20+08:00", "utc": "1983-11-18T13:07:20Z", "ms": 438008839774.3123 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-11-17", "window": { "start": { "local": "1983-11-17T17:13:54+08:00", "utc": "1983-11-17T09:13:54Z", "ms": 437908434077.3687 }, "end": { "local": "1983-11-17T19:01:56+08:00", "utc": "1983-11-17T11:01:56Z", "ms": 437914916291.78705 } }, "covered_min": 0, "window_min": 108, "qualifies": false }, { "local_date": "1983-11-18", "window": { "start": { "local": "1983-11-18T17:13:25+08:00", "utc": "1983-11-18T09:13:25Z", "ms": 437994804959.0516 }, "end": { "local": "1983-11-18T19:01:38+08:00", "utc": "1983-11-18T11:01:38Z", "ms": 438001298081.7916 } }, "covered_min": 108, "window_min": 108, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:34 on Thu 17 Nov to 21:07 on Fri 18 Nov.", "fact": "1983-11-17T12:34:28Z → 1983-11-18T13:07:20Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:14–19:02 on the 17th, 17:13–19:02 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 0 of 108 minutes on the 17th and 108 of 108 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 5552 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Friday 18 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": "1983-11-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-18", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Friday 18 November. Trayodaśī runs from 20:34 on Thu 17 Nov to 21:07 on Fri 18 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-11-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/rasayatra", "festival": "rasayatra", "name": "Rāsayātrā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9051, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-11-19T21:04:36+08:00", "utc": "1983-11-19T13:04:36Z", "ms": 438095076230.3708 }, "end": { "local": "1983-11-20T20:29:21+08:00", "utc": "1983-11-20T12:29:21Z", "ms": 438179361348.7301 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-19T21:04:36+08:00", "utc": "1983-11-19T13:04:36Z", "ms": 438095076230.3708 }, "end": { "local": "1983-11-20T20:29:21+08:00", "utc": "1983-11-20T12:29:21Z", "ms": 438179361348.7301 } }, "kaala": "nishita", "days": [ { "local_date": "1983-11-19", "window": { "start": { "local": "1983-11-19T23:35:27+08:00", "utc": "1983-11-19T15:35:27Z", "ms": 438104126772.20874 }, "end": { "local": "1983-11-20T00:23:27+08:00", "utc": "1983-11-19T16:23:27Z", "ms": 438107006772.20874 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-11-20", "window": { "start": { "local": "1983-11-20T23:35:40+08:00", "utc": "1983-11-20T15:35:40Z", "ms": 438190540186.6824 }, "end": { "local": "1983-11-21T00:23:40+08:00", "utc": "1983-11-20T16:23:40Z", "ms": 438193420186.6824 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 21:05 on Sat 19 Nov to 20:29 on Sun 20 Nov.", "fact": "1983-11-19T13:04:36Z → 1983-11-20T12:29:21Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:35–00:23 on the 19th, 23:36–00:24 on the 20th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during niśītha. 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. 104" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 9051 s" }, { "step": "ruling", "text": "Rāsayātrā, Lu’an, 1983: Saturday 19 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": "1983-11-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-19", "confidence": "determinate" } ], "quote": "In Lu’an, Rāsayātrā 1983 falls on Saturday 19 November. Pūrṇimā runs from 21:05 on Sat 19 Nov to 20:29 on Sun 20 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/kartiki-purnima", "festival": "kartiki-purnima", "name": "Kārtikī Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29167, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-11-19T21:04:36+08:00", "utc": "1983-11-19T13:04:36Z", "ms": 438095076230.3708 }, "end": { "local": "1983-11-20T20:29:21+08:00", "utc": "1983-11-20T12:29:21Z", "ms": 438179361348.7301 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1983-11-19T21:04:36+08:00", "utc": "1983-11-19T13:04:36Z", "ms": 438095076230.3708 }, "end": { "local": "1983-11-20T20:29:21+08:00", "utc": "1983-11-20T12:29:21Z", "ms": 438179361348.7301 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-11-19", "window": { "start": { "local": "1983-11-19T11:35:00+08:00", "utc": "1983-11-19T03:35:00Z", "ms": 438060900432.8106 }, "end": { "local": "1983-11-19T12:23:00+08:00", "utc": "1983-11-19T04:23:00Z", "ms": 438063780432.8106 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-11-20", "window": { "start": { "local": "1983-11-20T11:35:14+08:00", "utc": "1983-11-20T03:35:14Z", "ms": 438147313868.5872 }, "end": { "local": "1983-11-20T12:23:14+08:00", "utc": "1983-11-20T04:23:14Z", "ms": 438150193868.5872 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 21:05 on Sat 19 Nov to 20:29 on Sun 20 Nov.", "fact": "1983-11-19T13:04:36Z → 1983-11-20T12:29:21Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:35–12:23 on the 19th, 11:35–12:23 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 0 of 48 minutes on the 19th and 48 of 48 on the 20th.", "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 29167 s" }, { "step": "ruling", "text": "Kārtikī Pūrṇimā, Lu’an, 1983: Sunday 20 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": "1983-11-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-20", "confidence": "determinate" } ], "quote": "In Lu’an, Kārtikī Pūrṇimā 1983 falls on Sunday 20 November. Pūrṇimā runs from 21:05 on Sat 19 Nov to 20:29 on Sun 20 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-11-23", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12154, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-11-23T16:16:01+08:00", "utc": "1983-11-23T08:16:01Z", "ms": 438423360560.5898 }, "end": { "local": "1983-11-24T14:19:22+08:00", "utc": "1983-11-24T06:19:22Z", "ms": 438502762274.392 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-11-23T16:16:01+08:00", "utc": "1983-11-23T08:16:01Z", "ms": 438423360560.5898 }, "end": { "local": "1983-11-24T14:19:22+08:00", "utc": "1983-11-24T06:19:22Z", "ms": 438502762274.392 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-11-23", "window": { "start": { "local": "1983-11-23T19:38:34+08:00", "utc": "1983-11-23T11:38:34Z", "ms": 438435514133.4015 }, "end": { "local": "1983-11-23T19:38:34+08:00", "utc": "1983-11-23T11:38:34Z", "ms": 438435514133.4015 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-11-24", "window": { "start": { "local": "1983-11-24T20:41:16+08:00", "utc": "1983-11-24T12:41:16Z", "ms": 438525675762.1965 }, "end": { "local": "1983-11-24T20:41:16+08:00", "utc": "1983-11-24T12:41:16Z", "ms": 438525675762.1965 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 16:16 on Wed 23 Nov to 14:19 on Thu 24 Nov.", "fact": "1983-11-23T08:16:01Z → 1983-11-24T06:19:22Z" }, { "step": "kaala", "text": "Moonrise is at 19:39 on the 23rd and 20:41 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 12154 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Wednesday 23 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": "1983-11-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-23", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Wednesday 23 November. Caturthī runs from 16:16 on Wed 23 Nov to 14:19 on Thu 24 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-11-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-11-30", "festival": "ekadashi", "name": "Utpannā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-11-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18373, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-11-30T01:48:23+08:00", "utc": "1983-11-29T17:48:23Z", "ms": 438976102850.1735 }, "end": { "local": "1983-12-01T00:05:04+08:00", "utc": "1983-11-30T16:05:04Z", "ms": 439056304372.55383 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-11-30T01:48:23+08:00", "utc": "1983-11-29T17:48:23Z", "ms": 438976102850.1735 }, "end": { "local": "1983-12-01T00:05:04+08:00", "utc": "1983-11-30T16:05:04Z", "ms": 439056304372.55383 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-11-30", "window": { "start": { "local": "1983-11-30T06:54:35+08:00", "utc": "1983-11-29T22:54:35Z", "ms": 438994475351.74286 }, "end": { "local": "1983-11-30T06:54:35+08:00", "utc": "1983-11-29T22:54:35Z", "ms": 438994475351.74286 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1983-12-01", "window": { "start": { "local": "1983-12-01T06:55:26+08:00", "utc": "1983-11-30T22:55:26Z", "ms": 439080925741.3644 }, "end": { "local": "1983-12-01T06:55:26+08:00", "utc": "1983-11-30T22:55:26Z", "ms": 439080925741.3644 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 01:48 on Wed 30 Nov to 00:05 on Thu 1 Dec.", "fact": "1983-11-29T17:48:23Z → 1983-11-30T16:05:04Z" }, { "step": "kaala", "text": "Sunrise is at 06:55 on the 30th and 06:55 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 not on the 1st.", "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 18373 s" }, { "step": "ruling", "text": "Utpannā Ekādaśī, Lu’an, 1983: Wednesday 30 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": "1983-11-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-11-30", "confidence": "determinate" } ], "quote": "In Lu’an, Utpannā Ekādaśī 1983 falls on Wednesday 30 November. Ekādaśī runs from 01:48 on Wed 30 Nov to 00:05 on Thu 1 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-11-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-12-02", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8906, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-12-01T22:37:04+08:00", "utc": "1983-12-01T14:37:04Z", "ms": 439137423563.4907 }, "end": { "local": "1983-12-02T21:28:23+08:00", "utc": "1983-12-02T13:28:23Z", "ms": 439219703277.67035 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-01T22:37:04+08:00", "utc": "1983-12-01T14:37:04Z", "ms": 439137423563.4907 }, "end": { "local": "1983-12-02T21:28:23+08:00", "utc": "1983-12-02T13:28:23Z", "ms": 439219703277.67035 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-12-01", "window": { "start": { "local": "1983-12-01T17:09:43+08:00", "utc": "1983-12-01T09:09:43Z", "ms": 439117782629.52875 }, "end": { "local": "1983-12-01T18:59:55+08:00", "utc": "1983-12-01T10:59:55Z", "ms": 439124395036.45465 } }, "covered_min": 0, "window_min": 110, "qualifies": false }, { "local_date": "1983-12-02", "window": { "start": { "local": "1983-12-02T17:09:38+08:00", "utc": "1983-12-02T09:09:38Z", "ms": 439204177996.1322 }, "end": { "local": "1983-12-02T18:59:58+08:00", "utc": "1983-12-02T10:59:58Z", "ms": 439210797613.2613 } }, "covered_min": 110, "window_min": 110, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 22:37 on Thu 1 Dec to 21:28 on Fri 2 Dec.", "fact": "1983-12-01T14:37:04Z → 1983-12-02T13:28:23Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:10–19:00 on the 1st, 17:10–19:00 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 110 minutes on the 1st and 110 of 110 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 8906 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Friday 2 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": "1983-12-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-02", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Friday 2 December. Trayodaśī runs from 22:37 on Thu 1 Dec to 21:28 on Fri 2 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-12-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/shivaratri?on=1983-12-02", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7858, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1983-12-02T21:28:23+08:00", "utc": "1983-12-02T13:28:23Z", "ms": 439219703277.67035 }, "end": { "local": "1983-12-03T20:43:17+08:00", "utc": "1983-12-03T12:43:17Z", "ms": 439303397201.3797 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-02T21:28:23+08:00", "utc": "1983-12-02T13:28:23Z", "ms": 439219703277.67035 }, "end": { "local": "1983-12-03T20:43:17+08:00", "utc": "1983-12-03T12:43:17Z", "ms": 439303397201.3797 } }, "kaala": "nishita", "days": [ { "local_date": "1983-12-02", "window": { "start": { "local": "1983-12-02T23:39:22+08:00", "utc": "1983-12-02T15:39:22Z", "ms": 439227561560.36633 }, "end": { "local": "1983-12-03T00:27:22+08:00", "utc": "1983-12-02T16:27:22Z", "ms": 439230441560.36633 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-12-03", "window": { "start": { "local": "1983-12-03T23:39:45+08:00", "utc": "1983-12-03T15:39:45Z", "ms": 439313984594.43414 }, "end": { "local": "1983-12-04T00:27:45+08:00", "utc": "1983-12-03T16:27:45Z", "ms": 439316864594.43414 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 21:28 on Fri 2 Dec to 20:43 on Sat 3 Dec.", "fact": "1983-12-02T13:28:23Z → 1983-12-03T12:43:17Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:39–00:27 on the 2nd, 23:40–00:28 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 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. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 7858 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1983: Friday 2 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": "1983-12-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-02", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1983 falls on Friday 2 December. Caturdaśī runs from 21:28 on Fri 2 Dec to 20:43 on Sat 3 Dec and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1983/shivaratri?on=1983-12-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-12-08", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37077, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-12-07T22:46:57+08:00", "utc": "1983-12-07T14:46:57Z", "ms": 439656416831.5416 }, "end": { "local": "1983-12-09T00:37:59+08:00", "utc": "1983-12-08T16:37:59Z", "ms": 439749479395.1448 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-07T22:46:57+08:00", "utc": "1983-12-07T14:46:57Z", "ms": 439656416831.5416 }, "end": { "local": "1983-12-09T00:37:59+08:00", "utc": "1983-12-08T16:37:59Z", "ms": 439749479395.1448 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-12-07", "window": { "start": { "local": "1983-12-07T11:40:59+08:00", "utc": "1983-12-07T03:40:59Z", "ms": 439616459358.1419 }, "end": { "local": "1983-12-07T12:28:59+08:00", "utc": "1983-12-07T04:28:59Z", "ms": 439619339358.1419 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-12-08", "window": { "start": { "local": "1983-12-08T11:41:26+08:00", "utc": "1983-12-08T03:41:26Z", "ms": 439702885511.52234 }, "end": { "local": "1983-12-08T12:29:26+08:00", "utc": "1983-12-08T04:29:26Z", "ms": 439705765511.52234 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:47 on Wed 7 Dec to 00:38 on Fri 9 Dec.", "fact": "1983-12-07T14:46:57Z → 1983-12-08T16:37:59Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 7th, 11:41–12:29 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 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. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 37077 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1983: Thursday 8 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": "1983-12-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-08", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1983 falls on Thursday 8 December. Caturthī runs from 22:47 on Wed 7 Dec to 00:38 on Fri 9 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/vinayaka-chaturthi?on=1983-12-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/naga-panchami-margashirsha", "festival": "naga-panchami-margashirsha", "name": "Nāga Pañcamī (Mārgaśīrṣa)", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31732, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1983-12-09T00:37:59+08:00", "utc": "1983-12-08T16:37:59Z", "ms": 439749479395.1448 }, "end": { "local": "1983-12-10T02:53:28+08:00", "utc": "1983-12-09T18:53:28Z", "ms": 439844007660.12036 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-09T00:37:59+08:00", "utc": "1983-12-08T16:37:59Z", "ms": 439749479395.1448 }, "end": { "local": "1983-12-10T02:53:28+08:00", "utc": "1983-12-09T18:53:28Z", "ms": 439844007660.12036 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-12-09", "window": { "start": { "local": "1983-12-09T11:41:52+08:00", "utc": "1983-12-09T03:41:52Z", "ms": 439789312145.0806 }, "end": { "local": "1983-12-09T12:29:52+08:00", "utc": "1983-12-09T04:29:52Z", "ms": 439792192145.0806 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-12-10", "window": { "start": { "local": "1983-12-10T11:42:19+08:00", "utc": "1983-12-10T03:42:19Z", "ms": 439875739228.0209 }, "end": { "local": "1983-12-10T12:30:19+08:00", "utc": "1983-12-10T04:30:19Z", "ms": 439878619228.0209 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 00:38 on Fri 9 Dec to 02:53 on Sat 10 Dec.", "fact": "1983-12-08T16:37:59Z → 1983-12-09T18:53:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 9th, 11:42–12:30 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 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 31732 s" }, { "step": "ruling", "text": "Nāga Pañcamī (Mārgaśīrṣa), Lu’an, 1983: Friday 9 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": "1983-12-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-09", "confidence": "determinate" } ], "quote": "In Lu’an, Nāga Pañcamī (Mārgaśīrṣa) 1983 falls on Friday 9 December. Pañcamī runs from 00:38 on Fri 9 Dec to 02:53 on Sat 10 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/champa-shashthi", "festival": "champa-shashthi", "name": "Campā Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22746, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-12-10T02:53:28+08:00", "utc": "1983-12-09T18:53:28Z", "ms": 439844007660.12036 }, "end": { "local": "1983-12-11T05:23:40+08:00", "utc": "1983-12-10T21:23:40Z", "ms": 439939420355.56226 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-10T02:53:28+08:00", "utc": "1983-12-09T18:53:28Z", "ms": 439844007660.12036 }, "end": { "local": "1983-12-11T05:23:40+08:00", "utc": "1983-12-10T21:23:40Z", "ms": 439939420355.56226 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-12-10", "window": { "start": { "local": "1983-12-10T11:42:19+08:00", "utc": "1983-12-10T03:42:19Z", "ms": 439875739228.0209 }, "end": { "local": "1983-12-10T12:30:19+08:00", "utc": "1983-12-10T04:30:19Z", "ms": 439878619228.0209 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-12-11", "window": { "start": { "local": "1983-12-11T11:42:47+08:00", "utc": "1983-12-11T03:42:47Z", "ms": 439962166729.6543 }, "end": { "local": "1983-12-11T12:30:47+08:00", "utc": "1983-12-11T04:30:47Z", "ms": 439965046729.6543 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 02:53 on Sat 10 Dec to 05:24 on Sun 11 Dec.", "fact": "1983-12-09T18:53:28Z → 1983-12-10T21:23:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 10th, 11:43–12:31 on the 11th.", "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 10th and 0 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 22746 s" }, { "step": "ruling", "text": "Campā Ṣaṣṭhī, Lu’an, 1983: Saturday 10 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": "1983-12-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-10", "confidence": "determinate" } ], "quote": "In Lu’an, Campā Ṣaṣṭhī 1983 falls on Saturday 10 December. Ṣaṣṭhī runs from 02:53 on Sat 10 Dec to 05:24 on Sun 11 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/skanda-shashthi", "festival": "skanda-shashthi", "name": "Skanda Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22746, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1983-12-10T02:53:28+08:00", "utc": "1983-12-09T18:53:28Z", "ms": 439844007660.12036 }, "end": { "local": "1983-12-11T05:23:40+08:00", "utc": "1983-12-10T21:23:40Z", "ms": 439939420355.56226 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-10T02:53:28+08:00", "utc": "1983-12-09T18:53:28Z", "ms": 439844007660.12036 }, "end": { "local": "1983-12-11T05:23:40+08:00", "utc": "1983-12-10T21:23:40Z", "ms": 439939420355.56226 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-12-10", "window": { "start": { "local": "1983-12-10T11:42:19+08:00", "utc": "1983-12-10T03:42:19Z", "ms": 439875739228.0209 }, "end": { "local": "1983-12-10T12:30:19+08:00", "utc": "1983-12-10T04:30:19Z", "ms": 439878619228.0209 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-12-11", "window": { "start": { "local": "1983-12-11T11:42:47+08:00", "utc": "1983-12-11T03:42:47Z", "ms": 439962166729.6543 }, "end": { "local": "1983-12-11T12:30:47+08:00", "utc": "1983-12-11T04:30:47Z", "ms": 439965046729.6543 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 02:53 on Sat 10 Dec to 05:24 on Sun 11 Dec.", "fact": "1983-12-09T18:53:28Z → 1983-12-10T21:23:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 10th, 11:43–12:31 on the 11th.", "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 10th and 0 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: purvaviddha → only-day · margin 22746 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī, Lu’an, 1983: Saturday 10 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": "1983-12-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-10", "confidence": "determinate" } ], "quote": "In Lu’an, Skanda Ṣaṣṭhī 1983 falls on Saturday 10 December. Ṣaṣṭhī runs from 02:53 on Sat 10 Dec to 05:24 on Sun 11 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/mitra-saptami", "festival": "mitra-saptami", "name": "Mitra Saptamī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13624, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1983-12-11T05:23:40+08:00", "utc": "1983-12-10T21:23:40Z", "ms": 439939420355.56226 }, "end": { "local": "1983-12-12T07:56:11+08:00", "utc": "1983-12-11T23:56:11Z", "ms": 440034970829.7324 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-11T05:23:40+08:00", "utc": "1983-12-10T21:23:40Z", "ms": 439939420355.56226 }, "end": { "local": "1983-12-12T07:56:11+08:00", "utc": "1983-12-11T23:56:11Z", "ms": 440034970829.7324 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-12-11", "window": { "start": { "local": "1983-12-11T11:42:47+08:00", "utc": "1983-12-11T03:42:47Z", "ms": 439962166729.6543 }, "end": { "local": "1983-12-11T12:30:47+08:00", "utc": "1983-12-11T04:30:47Z", "ms": 439965046729.6543 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1983-12-12", "window": { "start": { "local": "1983-12-12T11:43:15+08:00", "utc": "1983-12-12T03:43:15Z", "ms": 440048594618.9591 }, "end": { "local": "1983-12-12T12:31:15+08:00", "utc": "1983-12-12T04:31:15Z", "ms": 440051474618.9591 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 05:24 on Sun 11 Dec to 07:56 on Mon 12 Dec.", "fact": "1983-12-10T21:23:40Z → 1983-12-11T23:56:11Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:43–12:31 on the 11th, 11:43–12:31 on the 12th.", "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 11th and 0 of 48 on the 12th.", "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 13624 s" }, { "step": "ruling", "text": "Mitra Saptamī, Lu’an, 1983: Sunday 11 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": "1983-12-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-11", "confidence": "determinate" } ], "quote": "In Lu’an, Mitra Saptamī 1983 falls on Sunday 11 December. Saptamī runs from 05:24 on Sun 11 Dec to 07:56 on Mon 12 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/ekadashi?on=1983-12-16", "festival": "ekadashi", "name": "Mokṣadā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23389, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-12-15T13:35:50+08:00", "utc": "1983-12-15T05:35:50Z", "ms": 440314550439.073 }, "end": { "local": "1983-12-16T14:16:06+08:00", "utc": "1983-12-16T06:16:06Z", "ms": 440403365640.10297 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-15T13:35:50+08:00", "utc": "1983-12-15T05:35:50Z", "ms": 440314550439.073 }, "end": { "local": "1983-12-16T14:16:06+08:00", "utc": "1983-12-16T06:16:06Z", "ms": 440403365640.10297 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-12-15", "window": { "start": { "local": "1983-12-15T07:06:02+08:00", "utc": "1983-12-14T23:06:02Z", "ms": 440291161778.7152 }, "end": { "local": "1983-12-15T07:06:02+08:00", "utc": "1983-12-14T23:06:02Z", "ms": 440291161778.7152 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-12-16", "window": { "start": { "local": "1983-12-16T07:06:40+08:00", "utc": "1983-12-15T23:06:40Z", "ms": 440377600342.43054 }, "end": { "local": "1983-12-16T07:06:40+08:00", "utc": "1983-12-15T23:06:40Z", "ms": 440377600342.43054 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:36 on Thu 15 Dec to 14:16 on Fri 16 Dec.", "fact": "1983-12-15T05:35:50Z → 1983-12-16T06:16:06Z" }, { "step": "kaala", "text": "Sunrise is at 07:06 on the 15th and 07:07 on the 16th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 15th and is on the 16th.", "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 23389 s" }, { "step": "ruling", "text": "Mokṣadā Ekādaśī, Lu’an, 1983: Friday 16 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": "1983-12-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-16", "confidence": "determinate" } ], "quote": "In Lu’an, Mokṣadā Ekādaśī 1983 falls on Friday 16 December. Ekādaśī runs from 13:36 on Thu 15 Dec to 14:16 on Fri 16 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-12-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/akhanda-dvadashi", "festival": "akhanda-dvadashi", "name": "Akhaṇḍa Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5909, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1983-12-16T14:16:06+08:00", "utc": "1983-12-16T06:16:06Z", "ms": 440403365640.10297 }, "end": { "local": "1983-12-17T14:12:08+08:00", "utc": "1983-12-17T06:12:08Z", "ms": 440489527702.1681 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-16T14:16:06+08:00", "utc": "1983-12-16T06:16:06Z", "ms": 440403365640.10297 }, "end": { "local": "1983-12-17T14:12:08+08:00", "utc": "1983-12-17T06:12:08Z", "ms": 440489527702.1681 } }, "kaala": "madhyahna", "days": [ { "local_date": "1983-12-16", "window": { "start": { "local": "1983-12-16T11:45:09+08:00", "utc": "1983-12-16T03:45:09Z", "ms": 440394309427.8228 }, "end": { "local": "1983-12-16T12:33:09+08:00", "utc": "1983-12-16T04:33:09Z", "ms": 440397189427.8228 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1983-12-17", "window": { "start": { "local": "1983-12-17T11:45:39+08:00", "utc": "1983-12-17T03:45:39Z", "ms": 440480738786.9371 }, "end": { "local": "1983-12-17T12:33:39+08:00", "utc": "1983-12-17T04:33:39Z", "ms": 440483618786.9371 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 14:16 on Fri 16 Dec to 14:12 on Sat 17 Dec.", "fact": "1983-12-16T06:16:06Z → 1983-12-17T06:12:08Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:45–12:33 on the 16th, 11:46–12:34 on the 17th.", "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 16th and 48 of 48 on the 17th.", "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 5909 s" }, { "step": "ruling", "text": "Akhaṇḍa Dvādaśī, Lu’an, 1983: Saturday 17 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": "1983-12-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-17", "confidence": "determinate" } ], "quote": "In Lu’an, Akhaṇḍa Dvādaśī 1983 falls on Saturday 17 December. Dvādaśī runs from 14:16 on Fri 16 Dec to 14:12 on Sat 17 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/pradosha-vrata?on=1983-12-17", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10792, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-12-17T14:12:08+08:00", "utc": "1983-12-17T06:12:08Z", "ms": 440489527702.1681 }, "end": { "local": "1983-12-18T13:25:04+08:00", "utc": "1983-12-18T05:25:04Z", "ms": 440573104118.9747 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-17T14:12:08+08:00", "utc": "1983-12-17T06:12:08Z", "ms": 440489527702.1681 }, "end": { "local": "1983-12-18T13:25:04+08:00", "utc": "1983-12-18T05:25:04Z", "ms": 440573104118.9747 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-12-17", "window": { "start": { "local": "1983-12-17T17:12:00+08:00", "utc": "1983-12-17T09:12:00Z", "ms": 440500319817.94794 }, "end": { "local": "1983-12-17T19:03:27+08:00", "utc": "1983-12-17T11:03:27Z", "ms": 440507007039.73096 } }, "covered_min": 111, "window_min": 111, "qualifies": true }, { "local_date": "1983-12-18", "window": { "start": { "local": "1983-12-18T17:12:23+08:00", "utc": "1983-12-18T09:12:23Z", "ms": 440586742713.1919 }, "end": { "local": "1983-12-18T19:03:52+08:00", "utc": "1983-12-18T11:03:52Z", "ms": 440593431549.11914 } }, "covered_min": 0, "window_min": 111, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 14:12 on Sat 17 Dec to 13:25 on Sun 18 Dec.", "fact": "1983-12-17T06:12:08Z → 1983-12-18T05:25:04Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:12–19:03 on the 17th, 17:12–19:04 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 111 of 111 minutes on the 17th and 0 of 111 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 10792 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1983: Saturday 17 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": "1983-12-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-17", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1983 falls on Saturday 17 December. Trayodaśī runs from 14:12 on Sat 17 Dec to 13:25 on Sun 18 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-12-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/dattatreyotpatti", "festival": "dattatreyotpatti", "name": "Dattātreyotpatti", "everyday": "Datta Jayanti", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18825, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1983-12-19T11:59:02+08:00", "utc": "1983-12-19T03:59:02Z", "ms": 440654342045.9082 }, "end": { "local": "1983-12-20T10:00:16+08:00", "utc": "1983-12-20T02:00:16Z", "ms": 440733615804.01776 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-19T11:59:02+08:00", "utc": "1983-12-19T03:59:02Z", "ms": 440654342045.9082 }, "end": { "local": "1983-12-20T10:00:16+08:00", "utc": "1983-12-20T02:00:16Z", "ms": 440733615804.01776 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-12-19", "window": { "start": { "local": "1983-12-19T17:12:47+08:00", "utc": "1983-12-19T09:12:47Z", "ms": 440673167174.8672 }, "end": { "local": "1983-12-19T19:04:17+08:00", "utc": "1983-12-19T11:04:17Z", "ms": 440679857248.3161 } }, "covered_min": 112, "window_min": 112, "qualifies": true }, { "local_date": "1983-12-20", "window": { "start": { "local": "1983-12-20T17:13:13+08:00", "utc": "1983-12-20T09:13:13Z", "ms": 440759593178.04443 }, "end": { "local": "1983-12-20T19:04:44+08:00", "utc": "1983-12-20T11:04:44Z", "ms": 440766284111.3604 } }, "covered_min": 0, "window_min": 112, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 11:59 on Mon 19 Dec to 10:00 on Tue 20 Dec.", "fact": "1983-12-19T03:59:02Z → 1983-12-20T02:00:16Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:13–19:04 on the 19th, 17:13–19:05 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 112 of 112 minutes on the 19th and 0 of 112 on the 20th.", "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 18825 s" }, { "step": "ruling", "text": "Dattātreyotpatti, Lu’an, 1983: Monday 19 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": "1983-12-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-19", "confidence": "determinate" } ], "quote": "In Lu’an, Dattātreyotpatti (Datta Jayanti) 1983 falls on Monday 19 December. Pūrṇimā runs from 11:59 on Mon 19 Dec to 10:00 on Tue 20 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/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": "/lu-an/festivals/1983/sankashta-chaturthi?on=1983-12-23", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9026, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1983-12-23T02:05:47+08:00", "utc": "1983-12-22T18:05:47Z", "ms": 440964346885.6374 }, "end": { "local": "1983-12-23T23:15:34+08:00", "utc": "1983-12-23T15:15:34Z", "ms": 441040534172.6774 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-23T02:05:47+08:00", "utc": "1983-12-22T18:05:47Z", "ms": 440964346885.6374 }, "end": { "local": "1983-12-23T23:15:34+08:00", "utc": "1983-12-23T15:15:34Z", "ms": 441040534172.6774 } }, "kaala": "moonrise", "days": [ { "local_date": "1983-12-22", "window": { "start": { "local": "1983-12-22T19:34:56+08:00", "utc": "1983-12-22T11:34:56Z", "ms": 440940896076.93604 }, "end": { "local": "1983-12-22T19:34:56+08:00", "utc": "1983-12-22T11:34:56Z", "ms": 440940896076.93604 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-12-23", "window": { "start": { "local": "1983-12-23T20:45:08+08:00", "utc": "1983-12-23T12:45:08Z", "ms": 441031507738.42804 }, "end": { "local": "1983-12-23T20:45:08+08:00", "utc": "1983-12-23T12:45:08Z", "ms": 441031507738.42804 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:06 on Fri 23 Dec to 23:16 on Fri 23 Dec.", "fact": "1983-12-22T18:05:47Z → 1983-12-23T15:15:34Z" }, { "step": "kaala", "text": "Moonrise is at 19:35 on the 22nd and 20:45 on the 23rd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 22nd and is 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 9026 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1983: Friday 23 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": "1983-12-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-23", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1983 falls on Friday 23 December. Caturthī runs from 02:06 on Fri 23 Dec to 23:16 on Fri 23 Dec and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/sankashta-chaturthi?on=1983-12-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/ekadashi?on=1983-12-30", "festival": "ekadashi", "name": "Saphalā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13949, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1983-12-29T11:37:48+08:00", "utc": "1983-12-29T03:37:48Z", "ms": 441517067696.7921 }, "end": { "local": "1983-12-30T11:05:53+08:00", "utc": "1983-12-30T03:05:53Z", "ms": 441601553103.5152 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-29T11:37:48+08:00", "utc": "1983-12-29T03:37:48Z", "ms": 441517067696.7921 }, "end": { "local": "1983-12-30T11:05:53+08:00", "utc": "1983-12-30T03:05:53Z", "ms": 441601553103.5152 } }, "kaala": "sunrise", "days": [ { "local_date": "1983-12-29", "window": { "start": { "local": "1983-12-29T07:13:05+08:00", "utc": "1983-12-28T23:13:05Z", "ms": 441501184628.79083 }, "end": { "local": "1983-12-29T07:13:05+08:00", "utc": "1983-12-28T23:13:05Z", "ms": 441501184628.79083 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1983-12-30", "window": { "start": { "local": "1983-12-30T07:13:24+08:00", "utc": "1983-12-29T23:13:24Z", "ms": 441587604093.28644 }, "end": { "local": "1983-12-30T07:13:24+08:00", "utc": "1983-12-29T23:13:24Z", "ms": 441587604093.28644 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:38 on Thu 29 Dec to 11:06 on Fri 30 Dec.", "fact": "1983-12-29T03:37:48Z → 1983-12-30T03:05:53Z" }, { "step": "kaala", "text": "Sunrise is at 07:13 on the 29th and 07:13 on the 30th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 29th and is on the 30th.", "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 13949 s" }, { "step": "ruling", "text": "Saphalā Ekādaśī, Lu’an, 1983: Friday 30 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": "1983-12-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-30", "confidence": "determinate" } ], "quote": "In Lu’an, Saphalā Ekādaśī 1983 falls on Friday 30 December. Ekādaśī runs from 11:38 on Thu 29 Dec to 11:06 on Fri 30 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1983/ekadashi?on=1983-12-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1983/pradosha-vrata?on=1983-12-31", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1983, "local_date": "1983-12-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21603, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1983-12-31T11:00:11+08:00", "utc": "1983-12-31T03:00:11Z", "ms": 441687610691.6973 }, "end": { "local": "1984-01-01T11:20:12+08:00", "utc": "1984-01-01T03:20:12Z", "ms": 441775212029.68256 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1983-12-31T11:00:11+08:00", "utc": "1983-12-31T03:00:11Z", "ms": 441687610691.6973 }, "end": { "local": "1984-01-01T11:20:12+08:00", "utc": "1984-01-01T03:20:12Z", "ms": 441775212029.68256 } }, "kaala": "pradosha", "days": [ { "local_date": "1983-12-31", "window": { "start": { "local": "1983-12-31T17:19:33+08:00", "utc": "1983-12-31T09:19:33Z", "ms": 441710372524.04285 }, "end": { "local": "1983-12-31T19:10:48+08:00", "utc": "1983-12-31T11:10:48Z", "ms": 441717047952.1571 } }, "covered_min": 111, "window_min": 111, "qualifies": true }, { "local_date": "1984-01-01", "window": { "start": { "local": "1984-01-01T17:20:15+08:00", "utc": "1984-01-01T09:20:15Z", "ms": 441796814543.17236 }, "end": { "local": "1984-01-01T19:11:26+08:00", "utc": "1984-01-01T11:11:26Z", "ms": 441803486318.8504 } }, "covered_min": 0, "window_min": 111, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:00 on Sat 31 Dec to 11:20 on Sun 1 Jan.", "fact": "1983-12-31T03:00:11Z → 1984-01-01T03:20:12Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:20–19:11 on the 31st, 17:20–19:11 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 111 of 111 minutes on the 31st and 0 of 111 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 21603 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1983: Saturday 31 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": "1983-12-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1983-12-31", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1983 falls on Saturday 31 December. Trayodaśī runs from 11:00 on Sat 31 Dec to 11:20 on Sun 1 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1983/pradosha-vrata?on=1983-12-31", "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" } }