{ "id": "/medan/festivals/2091", "place": { "id": "1214520", "slug": "medan", "name": "Medan", "region": "North Sumatra, Indonesia", "country": "ID", "lat": 3.58333, "lon": 98.66667, "elevation_m": 26, "tz": "Asia/Jakarta" }, "year": 2091, "tradition": "smarta", "method": "pac-rp@2026.1", "ruleset": "2026.3-draft", "rulings": [ { "id": "/medan/festivals/2091/ekadashi?on=2091-01-01", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23714, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2090-12-31T22:31:10+07:00", "utc": "2090-12-31T15:31:10Z", "ms": 3818417469718.931 }, "end": { "local": "2091-01-01T23:56:49+07:00", "utc": "2091-01-01T16:56:49Z", "ms": 3818509009108.5664 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "2090-12-31T22:31:10+07:00", "utc": "2090-12-31T15:31:10Z", "ms": 3818417469718.931 }, "end": { "local": "2091-01-01T23:56:49+07:00", "utc": "2091-01-01T16:56:49Z", "ms": 3818509009108.5664 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-01-01", "window": { "start": { "local": "2091-01-01T06:31:37+07:00", "utc": "2090-12-31T23:31:37Z", "ms": 3818446296801.3345 }, "end": { "local": "2091-01-01T06:31:37+07:00", "utc": "2090-12-31T23:31:37Z", "ms": 3818446296801.3345 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-01-02", "window": { "start": { "local": "2091-01-02T06:32:03+07:00", "utc": "2091-01-01T23:32:03Z", "ms": 3818532723477.853 }, "end": { "local": "2091-01-02T06:32:03+07:00", "utc": "2091-01-01T23:32:03Z", "ms": 3818532723477.853 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 22:31 on Sun 31 Dec to 23:57 on Mon 1 Jan.", "fact": "2090-12-31T15:31:10Z → 2091-01-01T16:56:49Z" }, { "step": "kaala", "text": "Sunrise is at 06:32 on the 1st and 06:32 on the 2nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 1st and is not on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 23714 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Medan, 2091: Monday 1 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": "2091-01-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-01", "confidence": "determinate" } ], "quote": "In Medan, Putradā Ekādaśī 2091 falls on Monday 1 January. Ekādaśī runs from 22:31 on Sun 31 Dec to 23:57 on Mon 1 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-01-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-01-03", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16591, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-01-03T00:40:14+07:00", "utc": "2091-01-02T17:40:14Z", "ms": 3818598013739.3457 }, "end": { "local": "2091-01-04T00:41:11+07:00", "utc": "2091-01-03T17:41:11Z", "ms": 3818684471155.165 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-01-03T00:40:14+07:00", "utc": "2091-01-02T17:40:14Z", "ms": 3818598013739.3457 }, "end": { "local": "2091-01-04T00:41:11+07:00", "utc": "2091-01-03T17:41:11Z", "ms": 3818684471155.165 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-01-02", "window": { "start": { "local": "2091-01-02T18:26:58+07:00", "utc": "2091-01-02T11:26:58Z", "ms": 3818575618105.306 }, "end": { "local": "2091-01-02T20:03:42+07:00", "utc": "2091-01-02T13:03:42Z", "ms": 3818581422314.5723 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "2091-01-03", "window": { "start": { "local": "2091-01-03T18:27:27+07:00", "utc": "2091-01-03T11:27:27Z", "ms": 3818662047211.78 }, "end": { "local": "2091-01-03T20:04:11+07:00", "utc": "2091-01-03T13:04:11Z", "ms": 3818667850965.6934 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 00:40 on Wed 3 Jan to 00:41 on Thu 4 Jan.", "fact": "2091-01-02T17:40:14Z → 2091-01-03T17:41:11Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:27–20:04 on the 2nd, 18:27–20:04 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 0 of 97 minutes on the 2nd and 97 of 97 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 16591 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Wednesday 3 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": "2091-01-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-03", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Wednesday 3 January. Trayodaśī runs from 00:40 on Wed 3 Jan to 00:41 on Thu 4 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-01-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/sankashta-chaturthi?on=2091-01-08", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13840, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-01-08T17:13:54+07:00", "utc": "2091-01-08T10:13:54Z", "ms": 3819089634321.068 }, "end": { "local": "2091-01-09T15:01:57+07:00", "utc": "2091-01-09T08:01:57Z", "ms": 3819168116621.9717 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-08T17:13:54+07:00", "utc": "2091-01-08T10:13:54Z", "ms": 3819089634321.068 }, "end": { "local": "2091-01-09T15:01:57+07:00", "utc": "2091-01-09T08:01:57Z", "ms": 3819168116621.9717 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-01-08", "window": { "start": { "local": "2091-01-08T21:04:35+07:00", "utc": "2091-01-08T14:04:35Z", "ms": 3819103474710.189 }, "end": { "local": "2091-01-08T21:04:35+07:00", "utc": "2091-01-08T14:04:35Z", "ms": 3819103474710.189 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-01-09", "window": { "start": { "local": "2091-01-09T21:59:17+07:00", "utc": "2091-01-09T14:59:17Z", "ms": 3819193156867.329 }, "end": { "local": "2091-01-09T21:59:17+07:00", "utc": "2091-01-09T14:59:17Z", "ms": 3819193156867.329 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:14 on Mon 8 Jan to 15:02 on Tue 9 Jan.", "fact": "2091-01-08T10:13:54Z → 2091-01-09T08:01:57Z" }, { "step": "kaala", "text": "Moonrise is at 21:05 on the 8th and 21:59 on the 9th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 8th and is not on the 9th.", "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 13840 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Monday 8 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": "2091-01-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-08", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Monday 8 January. Caturthī runs from 17:14 on Mon 8 Jan to 15:02 on Tue 9 Jan and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-01-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/bhogi", "festival": "bhogi", "name": "Bhogi", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35740, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-02-13T21:33:49+07:00", "utc": "2091-02-13T14:33:49Z", "ms": 3822215629466.7173 } }, "span": { "of": "transit", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 } }, "kaala": "sunset-day", "days": [ { "local_date": "2091-01-15", "window": { "start": { "local": "2091-01-14T18:32:24+07:00", "utc": "2091-01-14T11:32:24Z", "ms": 3819612743731.9854 }, "end": { "local": "2091-01-15T18:32:48+07:00", "utc": "2091-01-15T11:32:48Z", "ms": 3819699167941.8184 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "2091-01-16", "window": { "start": { "local": "2091-01-15T18:32:48+07:00", "utc": "2091-01-15T11:32:48Z", "ms": 3819699167941.8184 }, "end": { "local": "2091-01-16T18:33:12+07:00", "utc": "2091-01-16T11:33:12Z", "ms": 3819785591595.093 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "2091-01-15", "days": -1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 08:37 on Mon 15 Jan.", "fact": "2091-01-15T01:37:08Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 15th ends at 18:33, and the day of the 16th ends at 18:33.", "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 14th and 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 sunset → only-day · margin 35740 s" }, { "step": "counted", "text": "Bhogi is kept the day before Pongal: Monday 15 January is the day taken above.", "fact": "follows: pongal − 1 d" }, { "step": "ruling", "text": "Bhogi, Medan, 2091: Sunday 14 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": "2091-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "2091-01-14", "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": "2091-01-14", "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 Medan, Bhogi 2091 falls on Sunday 14 January. It is kept the day before Pongal, which falls on Monday 15 January. The Sun enters Makara at 08:37 on Mon 15 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 14th and the 15th.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pongal", "festival": "pongal", "name": "Pongal", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35740, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-02-13T21:33:49+07:00", "utc": "2091-02-13T14:33:49Z", "ms": 3822215629466.7173 } }, "span": { "of": "transit", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 } }, "kaala": "sunset-day", "days": [ { "local_date": "2091-01-15", "window": { "start": { "local": "2091-01-14T18:32:24+07:00", "utc": "2091-01-14T11:32:24Z", "ms": 3819612743731.9854 }, "end": { "local": "2091-01-15T18:32:48+07:00", "utc": "2091-01-15T11:32:48Z", "ms": 3819699167941.8184 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "2091-01-16", "window": { "start": { "local": "2091-01-15T18:32:48+07:00", "utc": "2091-01-15T11:32:48Z", "ms": 3819699167941.8184 }, "end": { "local": "2091-01-16T18:33:12+07:00", "utc": "2091-01-16T11:33:12Z", "ms": 3819785591595.093 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 08:37 on Mon 15 Jan.", "fact": "2091-01-15T01:37:08Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 15th ends at 18:33, and the day of the 16th ends at 18:33.", "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 14th and 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 sunset → only-day · margin 35740 s" }, { "step": "ruling", "text": "Pongal, Medan, 2091: Monday 15 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": "2091-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-15", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "2091-01-15", "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": "2091-01-15", "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 Medan, Pongal 2091 falls on Monday 15 January. The Sun enters Makara at 08:37 on Mon 15 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 14th and the 15th.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/makara-sankranti", "festival": "makara-sankranti", "name": "Makara Saṅkrānti", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31028, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-02-13T21:33:49+07:00", "utc": "2091-02-13T14:33:49Z", "ms": 3822215629466.7173 } }, "span": { "of": "transit", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 } }, "kaala": "civil-day", "days": [ { "local_date": "2091-01-14", "window": { "start": { "local": "2091-01-14T00:00:00+07:00", "utc": "2091-01-13T17:00:00Z", "ms": 3819546000000 }, "end": { "local": "2091-01-15T00:00:00+07:00", "utc": "2091-01-14T17:00:00Z", "ms": 3819632400000 } }, "covered_min": 0, "window_min": 1440, "qualifies": false }, { "local_date": "2091-01-15", "window": { "start": { "local": "2091-01-15T00:00:00+07:00", "utc": "2091-01-14T17:00:00Z", "ms": 3819632400000 }, "end": { "local": "2091-01-16T00:00:00+07:00", "utc": "2091-01-15T17:00:00Z", "ms": 3819718800000 } }, "covered_min": 1, "window_min": 1440, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 08:37 on Mon 15 Jan.", "fact": "2091-01-15T01:37:08Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from midnight to midnight, on the clock of Medan.", "fact": "civil-day: midnight-to-midnight · Asia/Jakarta" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from midnight. The transit falls on the 15th, not the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from midnight → only-day · margin 31028 s" }, { "step": "ruling", "text": "Makara Saṅkrānti, Medan, 2091: Monday 15 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": "2091-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-15", "confidence": "determinate" }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "2091-01-15", "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." } }, { "kind": "reckoning", "id": "sunset-rule", "local_date": "2091-01-15", "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 Medan, Makara Saṅkrānti 2091 falls on Monday 15 January. The Sun enters Makara at 08:37 on Mon 15 Jan, and the rule counts the day from midnight.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-01-15", "festival": "ekadashi", "name": "Ṣaṭtilā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12216, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-01-15T03:13:22+07:00", "utc": "2091-01-14T20:13:22Z", "ms": 3819644002102.0225 }, "end": { "local": "2091-01-16T01:48:50+07:00", "utc": "2091-01-15T18:48:50Z", "ms": 3819725330235.8076 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-15T03:13:22+07:00", "utc": "2091-01-14T20:13:22Z", "ms": 3819644002102.0225 }, "end": { "local": "2091-01-16T01:48:50+07:00", "utc": "2091-01-15T18:48:50Z", "ms": 3819725330235.8076 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-01-15", "window": { "start": { "local": "2091-01-15T06:36:58+07:00", "utc": "2091-01-14T23:36:58Z", "ms": 3819656218359.7993 }, "end": { "local": "2091-01-15T06:36:58+07:00", "utc": "2091-01-14T23:36:58Z", "ms": 3819656218359.7993 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-01-16", "window": { "start": { "local": "2091-01-16T06:37:16+07:00", "utc": "2091-01-15T23:37:16Z", "ms": 3819742636337.3613 }, "end": { "local": "2091-01-16T06:37:16+07:00", "utc": "2091-01-15T23:37:16Z", "ms": 3819742636337.3613 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:13 on Mon 15 Jan to 01:49 on Tue 16 Jan.", "fact": "2091-01-14T20:13:22Z → 2091-01-15T18:48:50Z" }, { "step": "kaala", "text": "Sunrise is at 06:37 on the 15th and 06:37 on the 16th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 15th and is not 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 12216 s" }, { "step": "ruling", "text": "Ṣaṭtilā Ekādaśī, Medan, 2091: Monday 15 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": "2091-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-15", "confidence": "determinate" } ], "quote": "In Medan, Ṣaṭtilā Ekādaśī 2091 falls on Monday 15 January. Ekādaśī runs from 03:13 on Mon 15 Jan to 01:49 on Tue 16 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-01-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/mattu-pongal", "festival": "mattu-pongal", "name": "Mattu Pongal", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35740, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-02-13T21:33:49+07:00", "utc": "2091-02-13T14:33:49Z", "ms": 3822215629466.7173 } }, "span": { "of": "transit", "start": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 }, "end": { "local": "2091-01-15T08:37:08+07:00", "utc": "2091-01-15T01:37:08Z", "ms": 3819663428091.6353 } }, "kaala": "sunset-day", "days": [ { "local_date": "2091-01-15", "window": { "start": { "local": "2091-01-14T18:32:24+07:00", "utc": "2091-01-14T11:32:24Z", "ms": 3819612743731.9854 }, "end": { "local": "2091-01-15T18:32:48+07:00", "utc": "2091-01-15T11:32:48Z", "ms": 3819699167941.8184 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "2091-01-16", "window": { "start": { "local": "2091-01-15T18:32:48+07:00", "utc": "2091-01-15T11:32:48Z", "ms": 3819699167941.8184 }, "end": { "local": "2091-01-16T18:33:12+07:00", "utc": "2091-01-16T11:33:12Z", "ms": 3819785591595.093 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "2091-01-15", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 08:37 on Mon 15 Jan.", "fact": "2091-01-15T01:37:08Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 15th ends at 18:33, and the day of the 16th ends at 18:33.", "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 14th and 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 sunset → only-day · margin 35740 s" }, { "step": "counted", "text": "Mattu Pongal is kept the day after Pongal: Monday 15 January is the day taken above.", "fact": "follows: pongal + 1 d" }, { "step": "ruling", "text": "Mattu Pongal, Medan, 2091: Tuesday 16 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": "2091-01-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-16", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "2091-01-16", "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": "2091-01-16", "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 Medan, Mattu Pongal 2091 falls on Tuesday 16 January. It is kept the day after Pongal, which falls on Monday 15 January. The Sun enters Makara at 08:37 on Mon 15 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 14th and the 15th.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pradosha-vrata?on=2091-01-17", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13302, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-01-17T00:40:21+07:00", "utc": "2091-01-16T17:40:21Z", "ms": 3819807621059.981 }, "end": { "local": "2091-01-17T23:51:50+07:00", "utc": "2091-01-17T16:51:50Z", "ms": 3819891110389.483 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-17T00:40:21+07:00", "utc": "2091-01-16T17:40:21Z", "ms": 3819807621059.981 }, "end": { "local": "2091-01-17T23:51:50+07:00", "utc": "2091-01-17T16:51:50Z", "ms": 3819891110389.483 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-01-16", "window": { "start": { "local": "2091-01-16T18:33:12+07:00", "utc": "2091-01-16T11:33:12Z", "ms": 3819785591595.093 }, "end": { "local": "2091-01-16T20:09:47+07:00", "utc": "2091-01-16T13:09:47Z", "ms": 3819791386521.892 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "2091-01-17", "window": { "start": { "local": "2091-01-17T18:33:35+07:00", "utc": "2091-01-17T11:33:35Z", "ms": 3819872014668.979 }, "end": { "local": "2091-01-17T20:10:09+07:00", "utc": "2091-01-17T13:10:09Z", "ms": 3819877808708.7563 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 00:40 on Wed 17 Jan to 23:52 on Wed 17 Jan.", "fact": "2091-01-16T17:40:21Z → 2091-01-17T16:51:50Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:33–20:10 on the 16th, 18:34–20:10 on the 17th.", "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 16th and 97 of 97 on the 17th.", "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 13302 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Wednesday 17 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": "2091-01-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-17", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Wednesday 17 January. Trayodaśī runs from 00:40 on Wed 17 Jan to 23:52 on Wed 17 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-01-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-01-17", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1192, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-01-17T23:51:50+07:00", "utc": "2091-01-17T16:51:50Z", "ms": 3819891110389.483 }, "end": { "local": "2091-01-18T23:27:45+07:00", "utc": "2091-01-18T16:27:45Z", "ms": 3819976065270.7764 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-17T23:51:50+07:00", "utc": "2091-01-17T16:51:50Z", "ms": 3819891110389.483 }, "end": { "local": "2091-01-18T23:27:45+07:00", "utc": "2091-01-18T16:27:45Z", "ms": 3819976065270.7764 } }, "kaala": "nishita", "days": [ { "local_date": "2091-01-17", "window": { "start": { "local": "2091-01-18T00:11:42+07:00", "utc": "2091-01-17T17:11:42Z", "ms": 3819892302318.1445 }, "end": { "local": "2091-01-18T00:59:42+07:00", "utc": "2091-01-17T17:59:42Z", "ms": 3819895182318.1445 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-01-18", "window": { "start": { "local": "2091-01-19T00:12:01+07:00", "utc": "2091-01-18T17:12:01Z", "ms": 3819978721362.172 }, "end": { "local": "2091-01-19T01:00:01+07:00", "utc": "2091-01-18T18:00:01Z", "ms": 3819981601362.172 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:52 on Wed 17 Jan to 23:28 on Thu 18 Jan.", "fact": "2091-01-17T16:51:50Z → 2091-01-18T16:27:45Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:12–01:00 on the 17th, 00:12–01:00 on the 18th.", "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 17th and 0 of 48 on the 18th.", "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 1192 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Wednesday 17 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": "2091-01-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-17", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Wednesday 17 January. Caturdaśī runs from 23:52 on Wed 17 Jan to 23:28 on Thu 18 Jan and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-01-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/yama-tarpana", "festival": "yama-tarpana", "name": "Yama Tarpaṇa", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18566, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-01-17T23:51:50+07:00", "utc": "2091-01-17T16:51:50Z", "ms": 3819891110389.483 }, "end": { "local": "2091-01-18T23:27:45+07:00", "utc": "2091-01-18T16:27:45Z", "ms": 3819976065270.7764 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-17T23:51:50+07:00", "utc": "2091-01-17T16:51:50Z", "ms": 3819891110389.483 }, "end": { "local": "2091-01-18T23:27:45+07:00", "utc": "2091-01-18T16:27:45Z", "ms": 3819976065270.7764 } }, "kaala": "arunodaya", "days": [ { "local_date": "2091-01-18", "window": { "start": { "local": "2091-01-18T05:01:16+07:00", "utc": "2091-01-17T22:01:16Z", "ms": 3819909675927.533 }, "end": { "local": "2091-01-18T06:37:50+07:00", "utc": "2091-01-17T23:37:50Z", "ms": 3819915469967.3105 } }, "covered_min": 97, "window_min": 97, "qualifies": true }, { "local_date": "2091-01-19", "window": { "start": { "local": "2091-01-19T05:01:32+07:00", "utc": "2091-01-18T22:01:32Z", "ms": 3819996092457.5396 }, "end": { "local": "2091-01-19T06:38:06+07:00", "utc": "2091-01-18T23:38:06Z", "ms": 3820001885583.1274 } }, "covered_min": 0, "window_min": 97, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:52 on Wed 17 Jan to 23:28 on Thu 18 Jan.", "fact": "2091-01-17T16:51:50Z → 2091-01-18T16:27:45Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:01–06:38 on the 18th, 05:02–06:38 on the 19th.", "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 97 of 97 minutes on the 18th and 0 of 97 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one dawn qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18566 s" }, { "step": "ruling", "text": "Yama Tarpaṇa, Medan, 2091: Thursday 18 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "yama-tarpana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Yama tarpana (covering a period of 4 ghatikas before sunrise)" } ], "kaala": "arunodaya", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-01-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-18", "confidence": "determinate" } ], "quote": "In Medan, Yama Tarpaṇa 2091 falls on Thursday 18 January. Caturdaśī runs from 23:52 on Wed 17 Jan to 23:28 on Thu 18 Jan and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ganesha-jayanti", "festival": "ganesha-jayanti", "name": "Gaṇeśa Jayantī", "everyday": "Maghi Ganesh Jayanti", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24714, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-01-23T03:07:10+07:00", "utc": "2091-01-22T20:07:10Z", "ms": 3820334829528.187 }, "end": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-23T03:07:10+07:00", "utc": "2091-01-22T20:07:10Z", "ms": 3820334829528.187 }, "end": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-01-23", "window": { "start": { "local": "2091-01-23T12:13:20+07:00", "utc": "2091-01-23T05:13:20Z", "ms": 3820367599726.087 }, "end": { "local": "2091-01-23T13:01:20+07:00", "utc": "2091-01-23T06:01:20Z", "ms": 3820370479726.087 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-01-24", "window": { "start": { "local": "2091-01-24T12:13:35+07:00", "utc": "2091-01-24T05:13:35Z", "ms": 3820454014639.663 }, "end": { "local": "2091-01-24T13:01:35+07:00", "utc": "2091-01-24T06:01:35Z", "ms": 3820456894639.663 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 03:07 on Tue 23 Jan to 05:22 on Wed 24 Jan.", "fact": "2091-01-22T20:07:10Z → 2091-01-23T22:21:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 23rd, 12:14–13:02 on the 24th.", "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 23rd and 0 of 48 on the 24th.", "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 24714 s" }, { "step": "ruling", "text": "Gaṇeśa Jayantī, Medan, 2091: Tuesday 23 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ganesha-jayanti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-01-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-23", "confidence": "determinate" } ], "quote": "In Medan, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 2091 falls on Tuesday 23 January. Caturthī runs from 03:07 on Tue 23 Jan to 05:22 on Wed 24 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/ganesha-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/tila-chaturthi", "festival": "tila-chaturthi", "name": "Tila Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24920, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-01-23T03:07:10+07:00", "utc": "2091-01-22T20:07:10Z", "ms": 3820334829528.187 }, "end": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-23T03:07:10+07:00", "utc": "2091-01-22T20:07:10Z", "ms": 3820334829528.187 }, "end": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-01-22", "window": { "start": { "local": "2091-01-22T18:35:21+07:00", "utc": "2091-01-22T11:35:21Z", "ms": 3820304120605.3516 }, "end": { "local": "2091-01-22T20:11:50+07:00", "utc": "2091-01-22T13:11:50Z", "ms": 3820309909814.849 } }, "covered_min": 0, "window_min": 96, "qualifies": false }, { "local_date": "2091-01-23", "window": { "start": { "local": "2091-01-23T18:35:40+07:00", "utc": "2091-01-23T11:35:40Z", "ms": 3820390539775.5913 }, "end": { "local": "2091-01-23T20:12:08+07:00", "utc": "2091-01-23T13:12:08Z", "ms": 3820396327944.435 } }, "covered_min": 96, "window_min": 96, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 03:07 on Tue 23 Jan to 05:22 on Wed 24 Jan.", "fact": "2091-01-22T20:07:10Z → 2091-01-23T22:21:41Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:35–20:12 on the 22nd, 18:36–20:12 on the 23rd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during pradoṣa. It covers 0 of 96 minutes on the 22nd and 96 of 96 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 24920 s" }, { "step": "ruling", "text": "Tila Caturthī, Medan, 2091: Tuesday 23 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "tila-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-01-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-23", "confidence": "determinate" } ], "quote": "In Medan, Tila Caturthī 2091 falls on Tuesday 23 January. Caturthī runs from 03:07 on Tue 23 Jan to 05:22 on Wed 24 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/tila-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shri-panchami", "festival": "shri-panchami", "name": "Śrī Pañcamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15437, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 }, "end": { "local": "2091-01-25T07:56:32+07:00", "utc": "2091-01-25T00:56:32Z", "ms": 3820524992169.47 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 }, "end": { "local": "2091-01-25T07:56:32+07:00", "utc": "2091-01-25T00:56:32Z", "ms": 3820524992169.47 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-01-24", "window": { "start": { "local": "2091-01-24T12:13:35+07:00", "utc": "2091-01-24T05:13:35Z", "ms": 3820454014639.663 }, "end": { "local": "2091-01-24T13:01:35+07:00", "utc": "2091-01-24T06:01:35Z", "ms": 3820456894639.663 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-01-25", "window": { "start": { "local": "2091-01-25T12:13:49+07:00", "utc": "2091-01-25T05:13:49Z", "ms": 3820540428751.1953 }, "end": { "local": "2091-01-25T13:01:49+07:00", "utc": "2091-01-25T06:01:49Z", "ms": 3820543308751.1953 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 05:22 on Wed 24 Jan to 07:57 on Thu 25 Jan.", "fact": "2091-01-23T22:21:41Z → 2091-01-25T00:56:32Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:14–13:02 on the 24th, 12:14–13:02 on the 25th.", "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 24th and 0 of 48 on the 25th.", "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 15437 s" }, { "step": "ruling", "text": "Śrī Pañcamī, Medan, 2091: Wednesday 24 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shri-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Sri Pancami (purvaviddha), Sarasvati puja (Bengal), Vasanta pancami, Madana pancami." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-01-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-24", "confidence": "determinate" } ], "quote": "In Medan, Śrī Pañcamī 2091 falls on Wednesday 24 January. Pañcamī runs from 05:22 on Wed 24 Jan to 07:57 on Thu 25 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/shri-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/vasanta-panchami", "festival": "vasanta-panchami", "name": "Vasanta Pañcamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15437, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 }, "end": { "local": "2091-01-25T07:56:32+07:00", "utc": "2091-01-25T00:56:32Z", "ms": 3820524992169.47 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-24T05:21:41+07:00", "utc": "2091-01-23T22:21:41Z", "ms": 3820429300875.9976 }, "end": { "local": "2091-01-25T07:56:32+07:00", "utc": "2091-01-25T00:56:32Z", "ms": 3820524992169.47 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-01-24", "window": { "start": { "local": "2091-01-24T12:13:35+07:00", "utc": "2091-01-24T05:13:35Z", "ms": 3820454014639.663 }, "end": { "local": "2091-01-24T13:01:35+07:00", "utc": "2091-01-24T06:01:35Z", "ms": 3820456894639.663 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-01-25", "window": { "start": { "local": "2091-01-25T12:13:49+07:00", "utc": "2091-01-25T05:13:49Z", "ms": 3820540428751.1953 }, "end": { "local": "2091-01-25T13:01:49+07:00", "utc": "2091-01-25T06:01:49Z", "ms": 3820543308751.1953 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 05:22 on Wed 24 Jan to 07:57 on Thu 25 Jan.", "fact": "2091-01-23T22:21:41Z → 2091-01-25T00:56:32Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:14–13:02 on the 24th, 12:14–13:02 on the 25th.", "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 24th and 0 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15437 s" }, { "step": "ruling", "text": "Vasanta Pañcamī, Medan, 2091: Wednesday 24 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vasanta-panchami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Sri Pancami (purvaviddha), Sarasvati puja (Bengal), Vasanta pancami, Madana pancami." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-01-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-24", "confidence": "determinate" } ], "quote": "In Medan, Vasanta Pañcamī 2091 falls on Wednesday 24 January. Pañcamī runs from 05:22 on Wed 24 Jan to 07:57 on Thu 25 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vasanta-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ratha-saptami", "festival": "ratha-saptami", "name": "Ratha Saptamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14382, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "2091-01-26T10:39:13+07:00", "utc": "2091-01-26T03:39:13Z", "ms": 3820621153479.165 }, "end": { "local": "2091-01-27T13:14:54+07:00", "utc": "2091-01-27T06:14:54Z", "ms": 3820716894242.3687 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-26T10:39:13+07:00", "utc": "2091-01-26T03:39:13Z", "ms": 3820621153479.165 }, "end": { "local": "2091-01-27T13:14:54+07:00", "utc": "2091-01-27T06:14:54Z", "ms": 3820716894242.3687 } }, "kaala": "arunodaya", "days": [ { "local_date": "2091-01-26", "window": { "start": { "local": "2091-01-26T05:03:05+07:00", "utc": "2091-01-25T22:03:05Z", "ms": 3820600985096.5537 }, "end": { "local": "2091-01-26T06:39:31+07:00", "utc": "2091-01-25T23:39:31Z", "ms": 3820606771114.686 } }, "covered_min": 0, "window_min": 96, "qualifies": false }, { "local_date": "2091-01-27", "window": { "start": { "local": "2091-01-27T05:03:15+07:00", "utc": "2091-01-26T22:03:15Z", "ms": 3820687394899.927 }, "end": { "local": "2091-01-27T06:39:40+07:00", "utc": "2091-01-26T23:39:40Z", "ms": 3820693179809.299 } }, "covered_min": 96, "window_min": 96, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 10:39 on Fri 26 Jan to 13:15 on Sat 27 Jan.", "fact": "2091-01-26T03:39:13Z → 2091-01-27T06:14:54Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:03–06:40 on the 26th, 05:03–06:40 on the 27th.", "fact": "arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during aruṇodaya. It covers 0 of 96 minutes on the 26th and 96 of 96 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one dawn qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 14382 s" }, { "step": "ruling", "text": "Ratha Saptamī, Medan, 2091: Saturday 27 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ratha-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Ratha saptami (covering 4 ghatikas before sunrise), Acala saptami, Vidhana saptami, Arogya saptami [purvaviddha]." } ], "kaala": "arunodaya", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-01-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-27", "confidence": "determinate" } ], "quote": "In Medan, Ratha Saptamī 2091 falls on Saturday 27 January. Saptamī runs from 10:39 on Fri 26 Jan to 13:15 on Sat 27 Jan and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/medan/festivals/2091/ratha-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-01-31", "festival": "ekadashi", "name": "Jayā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-01-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 40990, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-01-30T18:03:10+07:00", "utc": "2091-01-30T11:03:10Z", "ms": 3820993390429.957 }, "end": { "local": "2091-01-31T18:11:22+07:00", "utc": "2091-01-31T11:11:22Z", "ms": 3821080281595.8555 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-30T18:03:10+07:00", "utc": "2091-01-30T11:03:10Z", "ms": 3820993390429.957 }, "end": { "local": "2091-01-31T18:11:22+07:00", "utc": "2091-01-31T11:11:22Z", "ms": 3821080281595.8555 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-01-30", "window": { "start": { "local": "2091-01-30T06:40:00+07:00", "utc": "2091-01-29T23:40:00Z", "ms": 3820952400482.844 }, "end": { "local": "2091-01-30T06:40:00+07:00", "utc": "2091-01-29T23:40:00Z", "ms": 3820952400482.844 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-01-31", "window": { "start": { "local": "2091-01-31T06:40:06+07:00", "utc": "2091-01-30T23:40:06Z", "ms": 3821038805567.9595 }, "end": { "local": "2091-01-31T06:40:06+07:00", "utc": "2091-01-30T23:40:06Z", "ms": 3821038805567.9595 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:03 on Tue 30 Jan to 18:11 on Wed 31 Jan.", "fact": "2091-01-30T11:03:10Z → 2091-01-31T11:11:22Z" }, { "step": "kaala", "text": "Sunrise is at 06:40 on the 30th and 06:40 on the 31st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 30th and is on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 40990 s" }, { "step": "ruling", "text": "Jayā Ekādaśī, Medan, 2091: Wednesday 31 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": "2091-01-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-01-31", "confidence": "determinate" } ], "quote": "In Medan, Jayā Ekādaśī 2091 falls on Wednesday 31 January. Ekādaśī runs from 18:03 on Tue 30 Jan to 18:11 on Wed 31 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-01-31", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/bhishma-dvadashi", "festival": "bhishma-dvadashi", "name": "Bhīṣma Dvādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16176, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-01-31T18:11:22+07:00", "utc": "2091-01-31T11:11:22Z", "ms": 3821080281595.8555 }, "end": { "local": "2091-02-01T17:32:41+07:00", "utc": "2091-02-01T10:32:41Z", "ms": 3821164360865.1343 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-01-31T18:11:22+07:00", "utc": "2091-01-31T11:11:22Z", "ms": 3821080281595.8555 }, "end": { "local": "2091-02-01T17:32:41+07:00", "utc": "2091-02-01T10:32:41Z", "ms": 3821164360865.1343 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-01-31", "window": { "start": { "local": "2091-01-31T12:14:56+07:00", "utc": "2091-01-31T05:14:56Z", "ms": 3821058896195.5 }, "end": { "local": "2091-01-31T13:02:56+07:00", "utc": "2091-01-31T06:02:56Z", "ms": 3821061776195.5 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-02-01", "window": { "start": { "local": "2091-02-01T12:15:05+07:00", "utc": "2091-02-01T05:15:05Z", "ms": 3821145304535.8975 }, "end": { "local": "2091-02-01T13:03:05+07:00", "utc": "2091-02-01T06:03:05Z", "ms": 3821148184535.8975 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 18:11 on Wed 31 Jan to 17:33 on Thu 1 Feb.", "fact": "2091-01-31T11:11:22Z → 2091-02-01T10:32:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:15–13:03 on the 31st, 12:15–13:03 on the 1st.", "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 31st and 48 of 48 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 16176 s" }, { "step": "ruling", "text": "Bhīṣma Dvādaśī, Medan, 2091: Thursday 1 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bhishma-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Bhisma dvadasi (purvaviddha), Amalaki dvadasi, Santana dvadasi, Varaha dvadasi" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-02-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-01", "confidence": "determinate" } ], "quote": "In Medan, Bhīṣma Dvādaśī 2091 falls on Thursday 1 February. Dvādaśī runs from 18:11 on Wed 31 Jan to 17:33 on Thu 1 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/bhishma-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-02-01", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3918, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-02-01T17:32:41+07:00", "utc": "2091-02-01T10:32:41Z", "ms": 3821164360865.1343 }, "end": { "local": "2091-02-02T16:11:15+07:00", "utc": "2091-02-02T09:11:15Z", "ms": 3821245875327.083 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-02-01T17:32:41+07:00", "utc": "2091-02-01T10:32:41Z", "ms": 3821164360865.1343 }, "end": { "local": "2091-02-02T16:11:15+07:00", "utc": "2091-02-02T09:11:15Z", "ms": 3821245875327.083 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-02-01", "window": { "start": { "local": "2091-02-01T18:37:59+07:00", "utc": "2091-02-01T11:37:59Z", "ms": 3821168279318.8843 }, "end": { "local": "2091-02-01T20:14:17+07:00", "utc": "2091-02-01T13:14:17Z", "ms": 3821174057148.641 } }, "covered_min": 96, "window_min": 96, "qualifies": true }, { "local_date": "2091-02-02", "window": { "start": { "local": "2091-02-02T18:38:11+07:00", "utc": "2091-02-02T11:38:11Z", "ms": 3821254691056.7896 }, "end": { "local": "2091-02-02T20:14:28+07:00", "utc": "2091-02-02T13:14:28Z", "ms": 3821260467641.429 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 17:33 on Thu 1 Feb to 16:11 on Fri 2 Feb.", "fact": "2091-02-01T10:32:41Z → 2091-02-02T09:11:15Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:38–20:14 on the 1st, 18:38–20:14 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 96 of 96 minutes on the 1st and 0 of 96 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 3918 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Thursday 1 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": "2091-02-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-01", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Thursday 1 February. Trayodaśī runs from 17:33 on Thu 1 Feb to 16:11 on Fri 2 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-02-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/maghi-purnima", "festival": "maghi-purnima", "name": "Māghī Pūrṇimā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1643, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-02-03T14:13:41+07:00", "utc": "2091-02-03T07:13:41Z", "ms": 3821325221205.8857 }, "end": { "local": "2091-02-04T11:48:02+07:00", "utc": "2091-02-04T04:48:02Z", "ms": 3821402881713.1133 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "2091-02-03T14:13:41+07:00", "utc": "2091-02-03T07:13:41Z", "ms": 3821325221205.8857 }, "end": { "local": "2091-02-04T11:48:02+07:00", "utc": "2091-02-04T04:48:02Z", "ms": 3821402881713.1133 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-02-03", "window": { "start": { "local": "2091-02-03T12:15:19+07:00", "utc": "2091-02-03T05:15:19Z", "ms": 3821318118740.8203 }, "end": { "local": "2091-02-03T13:03:19+07:00", "utc": "2091-02-03T06:03:19Z", "ms": 3821320998740.8203 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-02-04", "window": { "start": { "local": "2091-02-04T12:15:25+07:00", "utc": "2091-02-04T05:15:25Z", "ms": 3821404524616.585 }, "end": { "local": "2091-02-04T13:03:25+07:00", "utc": "2091-02-04T06:03:25Z", "ms": 3821407404616.585 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:14 on Sat 3 Feb to 11:48 on Sun 4 Feb.", "fact": "2091-02-03T07:13:41Z → 2091-02-04T04:48:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:15–13:03 on the 3rd, 12:15–13:03 on the 4th.", "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 3rd and 0 of 48 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: paraviddha → second-day · margin 1643 s" }, { "step": "ruling", "text": "Māghī Pūrṇimā, Medan, 2091: Sunday 4 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "maghi-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Maghi purnima (paraviddha)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-02-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-04", "confidence": "determinate" } ], "quote": "In Medan, Māghī Pūrṇimā 2091 falls on Sunday 4 February. Pūrṇimā runs from 14:14 on Sat 3 Feb to 11:48 on Sun 4 Feb, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/medan/festivals/2091/maghi-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/sankashta-chaturthi?on=2091-02-07", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9355, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-02-07T03:08:49+07:00", "utc": "2091-02-06T20:08:49Z", "ms": 3821630929101.53 }, "end": { "local": "2091-02-08T00:15:31+07:00", "utc": "2091-02-07T17:15:31Z", "ms": 3821706930742.4155 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-02-07T03:08:49+07:00", "utc": "2091-02-06T20:08:49Z", "ms": 3821630929101.53 }, "end": { "local": "2091-02-08T00:15:31+07:00", "utc": "2091-02-07T17:15:31Z", "ms": 3821706930742.4155 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-02-06", "window": { "start": { "local": "2091-02-06T20:44:23+07:00", "utc": "2091-02-06T13:44:23Z", "ms": 3821607863342.857 }, "end": { "local": "2091-02-06T20:44:23+07:00", "utc": "2091-02-06T13:44:23Z", "ms": 3821607863342.857 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-02-07", "window": { "start": { "local": "2091-02-07T21:39:36+07:00", "utc": "2091-02-07T14:39:36Z", "ms": 3821697575561.3916 }, "end": { "local": "2091-02-07T21:39:36+07:00", "utc": "2091-02-07T14:39:36Z", "ms": 3821697575561.3916 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 03:09 on Wed 7 Feb to 00:16 on Thu 8 Feb.", "fact": "2091-02-06T20:08:49Z → 2091-02-07T17:15:31Z" }, { "step": "kaala", "text": "Moonrise is at 20:44 on the 6th and 21:40 on the 7th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 6th and is on the 7th.", "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 9355 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Wednesday 7 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-02-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-07", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Wednesday 7 February. Caturthī runs from 03:09 on Wed 7 Feb to 00:16 on Thu 8 Feb and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-02-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-02-14", "festival": "ekadashi", "name": "Vijayā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23460, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-02-13T13:28:06+07:00", "utc": "2091-02-13T06:28:06Z", "ms": 3822186486459.439 }, "end": { "local": "2091-02-14T13:10:46+07:00", "utc": "2091-02-14T06:10:46Z", "ms": 3822271845597.668 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-02-13T13:28:06+07:00", "utc": "2091-02-13T06:28:06Z", "ms": 3822186486459.439 }, "end": { "local": "2091-02-14T13:10:46+07:00", "utc": "2091-02-14T06:10:46Z", "ms": 3822271845597.668 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-02-13", "window": { "start": { "local": "2091-02-13T06:39:53+07:00", "utc": "2091-02-12T23:39:53Z", "ms": 3822161992734.2217 }, "end": { "local": "2091-02-13T06:39:53+07:00", "utc": "2091-02-12T23:39:53Z", "ms": 3822161992734.2217 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-02-14", "window": { "start": { "local": "2091-02-14T06:39:46+07:00", "utc": "2091-02-13T23:39:46Z", "ms": 3822248386037.124 }, "end": { "local": "2091-02-14T06:39:46+07:00", "utc": "2091-02-13T23:39:46Z", "ms": 3822248386037.124 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:28 on Tue 13 Feb to 13:11 on Wed 14 Feb.", "fact": "2091-02-13T06:28:06Z → 2091-02-14T06:10:46Z" }, { "step": "kaala", "text": "Sunrise is at 06:40 on the 13th and 06:40 on the 14th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 13th and is on the 14th.", "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 23460 s" }, { "step": "ruling", "text": "Vijayā Ekādaśī, Medan, 2091: Wednesday 14 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": "2091-02-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-14", "confidence": "determinate" } ], "quote": "In Medan, Vijayā Ekādaśī 2091 falls on Wednesday 14 February. Ekādaśī runs from 13:28 on Tue 13 Feb to 13:11 on Wed 14 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-02-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-02-15", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16754, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-02-15T13:21:34+07:00", "utc": "2091-02-15T06:21:34Z", "ms": 3822358894232.1543 }, "end": { "local": "2091-02-16T14:00:25+07:00", "utc": "2091-02-16T07:00:25Z", "ms": 3822447625418.2744 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-02-15T13:21:34+07:00", "utc": "2091-02-15T06:21:34Z", "ms": 3822358894232.1543 }, "end": { "local": "2091-02-16T14:00:25+07:00", "utc": "2091-02-16T07:00:25Z", "ms": 3822447625418.2744 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-02-15", "window": { "start": { "local": "2091-02-15T18:39:38+07:00", "utc": "2091-02-15T11:39:38Z", "ms": 3822377977564.1904 }, "end": { "local": "2091-02-15T20:15:37+07:00", "utc": "2091-02-15T13:15:37Z", "ms": 3822383736603.9614 } }, "covered_min": 96, "window_min": 96, "qualifies": true }, { "local_date": "2091-02-16", "window": { "start": { "local": "2091-02-16T18:39:39+07:00", "utc": "2091-02-16T11:39:39Z", "ms": 3822464379393.854 }, "end": { "local": "2091-02-16T20:15:37+07:00", "utc": "2091-02-16T13:15:37Z", "ms": 3822470136995.3438 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:22 on Thu 15 Feb to 14:00 on Fri 16 Feb.", "fact": "2091-02-15T06:21:34Z → 2091-02-16T07:00:25Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:40–20:16 on the 15th, 18:40–20:16 on the 16th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 96 of 96 minutes on the 15th and 0 of 96 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 16754 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Thursday 15 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": "2091-02-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-15", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Thursday 15 February. Trayodaśī runs from 13:22 on Thu 15 Feb to 14:00 on Fri 16 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-02-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/maha-shivaratri", "festival": "maha-shivaratri", "name": "Mahāśivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32912, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-02-16T14:00:25+07:00", "utc": "2091-02-16T07:00:25Z", "ms": 3822447625418.2744 }, "end": { "local": "2091-02-17T15:06:54+07:00", "utc": "2091-02-17T08:06:54Z", "ms": 3822538013841.3975 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-02-16T14:00:25+07:00", "utc": "2091-02-16T07:00:25Z", "ms": 3822447625418.2744 }, "end": { "local": "2091-02-17T15:06:54+07:00", "utc": "2091-02-17T08:06:54Z", "ms": 3822538013841.3975 } }, "kaala": "nishita", "days": [ { "local_date": "2091-02-16", "window": { "start": { "local": "2091-02-17T00:15:30+07:00", "utc": "2091-02-16T17:15:30Z", "ms": 3822484530399.44 }, "end": { "local": "2091-02-17T01:03:30+07:00", "utc": "2091-02-16T18:03:30Z", "ms": 3822487410399.44 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-02-17", "window": { "start": { "local": "2091-02-18T00:15:26+07:00", "utc": "2091-02-17T17:15:26Z", "ms": 3822570926142.0493 }, "end": { "local": "2091-02-18T01:03:26+07:00", "utc": "2091-02-17T18:03:26Z", "ms": 3822573806142.0493 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 14:00 on Fri 16 Feb to 15:07 on Sat 17 Feb.", "fact": "2091-02-16T07:00:25Z → 2091-02-17T08:06:54Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:16–01:04 on the 16th, 00:15–01:03 on the 17th.", "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 16th and 0 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 32912 s" }, { "step": "ruling", "text": "Mahāśivarātri, Medan, 2091: Friday 16 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "maha-shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Mahasivaratri (nisithavyapini) — In some opinion it is to be observed on nisitha and in some opinion on pradosa. If occurs on two successive nisithas then according to Hemadri it is to be observed on the first day and according to Madhava, to be observed on the second day" } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "disputed", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-02-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-16", "confidence": "determinate" } ], "quote": "In Medan, Mahāśivarātri 2091 falls on Friday 16 February. Caturdaśī runs from 14:00 on Fri 16 Feb to 15:07 on Sat 17 Feb and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/maha-shivaratri", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-02-22", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-02-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36219, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-02-21T23:30:22+07:00", "utc": "2091-02-21T16:30:22Z", "ms": 3822913821558.3843 }, "end": { "local": "2091-02-23T02:11:15+07:00", "utc": "2091-02-22T19:11:15Z", "ms": 3823009874758.329 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-02-21T23:30:22+07:00", "utc": "2091-02-21T16:30:22Z", "ms": 3822913821558.3843 }, "end": { "local": "2091-02-23T02:11:15+07:00", "utc": "2091-02-22T19:11:15Z", "ms": 3823009874758.329 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-02-22", "window": { "start": { "local": "2091-02-22T12:15:01+07:00", "utc": "2091-02-22T05:15:01Z", "ms": 3822959701397.078 }, "end": { "local": "2091-02-22T13:03:01+07:00", "utc": "2091-02-22T06:03:01Z", "ms": 3822962581397.078 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-02-23", "window": { "start": { "local": "2091-02-23T12:14:54+07:00", "utc": "2091-02-23T05:14:54Z", "ms": 3823046093531.969 }, "end": { "local": "2091-02-23T13:02:54+07:00", "utc": "2091-02-23T06:02:54Z", "ms": 3823048973531.969 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:30 on Wed 21 Feb to 02:11 on Fri 23 Feb.", "fact": "2091-02-21T16:30:22Z → 2091-02-22T19:11:15Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:15–13:03 on the 22nd, 12:15–13:03 on the 23rd.", "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 22nd and 0 of 48 on the 23rd.", "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 36219 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Thursday 22 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": "2091-02-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-02-22", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Thursday 22 February. Caturthī runs from 23:30 on Wed 21 Feb to 02:11 on Fri 23 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-02-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-03-02", "festival": "ekadashi", "name": "Āmalakī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10673, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-03-01T10:38:33+07:00", "utc": "2091-03-01T03:38:33Z", "ms": 3823558712594.994 }, "end": { "local": "2091-03-02T09:34:16+07:00", "utc": "2091-03-02T02:34:16Z", "ms": 3823641256188.964 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-03-01T10:38:33+07:00", "utc": "2091-03-01T03:38:33Z", "ms": 3823558712594.994 }, "end": { "local": "2091-03-02T09:34:16+07:00", "utc": "2091-03-02T02:34:16Z", "ms": 3823641256188.964 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-03-01", "window": { "start": { "local": "2091-03-01T06:36:40+07:00", "utc": "2091-02-28T23:36:40Z", "ms": 3823544200497.645 }, "end": { "local": "2091-03-01T06:36:40+07:00", "utc": "2091-02-28T23:36:40Z", "ms": 3823544200497.645 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-03-02", "window": { "start": { "local": "2091-03-02T06:36:23+07:00", "utc": "2091-03-01T23:36:23Z", "ms": 3823630583104.373 }, "end": { "local": "2091-03-02T06:36:23+07:00", "utc": "2091-03-01T23:36:23Z", "ms": 3823630583104.373 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:39 on Thu 1 Mar to 09:34 on Fri 2 Mar.", "fact": "2091-03-01T03:38:33Z → 2091-03-02T02:34:16Z" }, { "step": "kaala", "text": "Sunrise is at 06:37 on the 1st and 06:36 on the 2nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 1st and is on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 10673 s" }, { "step": "ruling", "text": "Āmalakī Ekādaśī, Medan, 2091: Friday 2 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": "2091-03-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-02", "confidence": "determinate" } ], "quote": "In Medan, Āmalakī Ekādaśī 2091 falls on Friday 2 March. Ekādaśī runs from 10:39 on Thu 1 Mar to 09:34 on Fri 2 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-03-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-03-03", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32614, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-03-03T07:45:24+07:00", "utc": "2091-03-03T00:45:24Z", "ms": 3823721124132.1836 }, "end": { "local": "2091-03-04T05:18:03+07:00", "utc": "2091-03-03T22:18:03Z", "ms": 3823798683153.4053 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-03-03T07:45:24+07:00", "utc": "2091-03-03T00:45:24Z", "ms": 3823721124132.1836 }, "end": { "local": "2091-03-04T05:18:03+07:00", "utc": "2091-03-03T22:18:03Z", "ms": 3823798683153.4053 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-03-02", "window": { "start": { "local": "2091-03-02T18:39:01+07:00", "utc": "2091-03-02T11:39:01Z", "ms": 3823673940961.15 }, "end": { "local": "2091-03-02T20:14:38+07:00", "utc": "2091-03-02T13:14:38Z", "ms": 3823679677524.3105 } }, "covered_min": 0, "window_min": 96, "qualifies": false }, { "local_date": "2091-03-03", "window": { "start": { "local": "2091-03-03T18:38:54+07:00", "utc": "2091-03-03T11:38:54Z", "ms": 3823760334168.998 }, "end": { "local": "2091-03-03T20:14:29+07:00", "utc": "2091-03-03T13:14:29Z", "ms": 3823766069181.3433 } }, "covered_min": 96, "window_min": 96, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 07:45 on Sat 3 Mar to 05:18 on Sun 4 Mar.", "fact": "2091-03-03T00:45:24Z → 2091-03-03T22:18:03Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:39–20:15 on the 2nd, 18:39–20:14 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 0 of 96 minutes on the 2nd and 96 of 96 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 32614 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Saturday 3 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": "2091-03-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-03", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Saturday 3 March. Trayodaśī runs from 07:45 on Sat 3 Mar to 05:18 on Sun 4 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-03-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/holika-dahana", "festival": "holika-dahana", "name": "Holikā Dahana", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15713, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-03-05T02:20:06+07:00", "utc": "2091-03-04T19:20:06Z", "ms": 3823874406209.231 }, "end": { "local": "2091-03-05T23:00:32+07:00", "utc": "2091-03-05T16:00:32Z", "ms": 3823948831825.735 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-03-05T02:20:06+07:00", "utc": "2091-03-04T19:20:06Z", "ms": 3823874406209.231 }, "end": { "local": "2091-03-05T23:00:32+07:00", "utc": "2091-03-05T16:00:32Z", "ms": 3823948831825.735 } }, "kaala": "sayahna", "days": [ { "local_date": "2091-03-04", "window": { "start": { "local": "2091-03-04T16:14:11+07:00", "utc": "2091-03-04T09:14:11Z", "ms": 3823838050895.813 }, "end": { "local": "2091-03-04T18:38:47+07:00", "utc": "2091-03-04T11:38:47Z", "ms": 3823846726929.37 } }, "covered_min": 0, "window_min": 145, "qualifies": false }, { "local_date": "2091-03-05", "window": { "start": { "local": "2091-03-05T16:14:01+07:00", "utc": "2091-03-05T09:14:01Z", "ms": 3823924440983.286 }, "end": { "local": "2091-03-05T18:38:39+07:00", "utc": "2091-03-05T11:38:39Z", "ms": 3823933119264.5356 } }, "covered_min": 145, "window_min": 145, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:20 on Mon 5 Mar to 23:01 on Mon 5 Mar.", "fact": "2091-03-04T19:20:06Z → 2091-03-05T16:00:32Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:14–18:39 on the 4th, 16:14–18:39 on the 5th.", "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 145 minutes on the 4th and 145 of 145 on the 5th.", "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 15713 s" }, { "step": "ruling", "text": "Holikā Dahana, Medan, 2091: Monday 5 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": "2091-03-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-05", "confidence": "determinate" } ], "quote": "In Medan, Holikā Dahana 2091 falls on Monday 5 March. Pūrṇimā runs from 02:20 on Mon 5 Mar to 23:01 on Mon 5 Mar and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/holi", "festival": "holi", "name": "Holī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15713, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-03-05T02:20:06+07:00", "utc": "2091-03-04T19:20:06Z", "ms": 3823874406209.231 }, "end": { "local": "2091-03-05T23:00:32+07:00", "utc": "2091-03-05T16:00:32Z", "ms": 3823948831825.735 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "2091-03-05T02:20:06+07:00", "utc": "2091-03-04T19:20:06Z", "ms": 3823874406209.231 }, "end": { "local": "2091-03-05T23:00:32+07:00", "utc": "2091-03-05T16:00:32Z", "ms": 3823948831825.735 } }, "kaala": "sayahna", "days": [ { "local_date": "2091-03-04", "window": { "start": { "local": "2091-03-04T16:14:11+07:00", "utc": "2091-03-04T09:14:11Z", "ms": 3823838050895.813 }, "end": { "local": "2091-03-04T18:38:47+07:00", "utc": "2091-03-04T11:38:47Z", "ms": 3823846726929.37 } }, "covered_min": 0, "window_min": 145, "qualifies": false }, { "local_date": "2091-03-05", "window": { "start": { "local": "2091-03-05T16:14:01+07:00", "utc": "2091-03-05T09:14:01Z", "ms": 3823924440983.286 }, "end": { "local": "2091-03-05T18:38:39+07:00", "utc": "2091-03-05T11:38:39Z", "ms": 3823933119264.5356 } }, "covered_min": 145, "window_min": 145, "qualifies": true } ], "follows": { "festival": "holika-dahana", "name": "Holikā Dahana", "local_date": "2091-03-05", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:20 on Mon 5 Mar to 23:01 on Mon 5 Mar.", "fact": "2091-03-04T19:20:06Z → 2091-03-05T16:00:32Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:14–18:39 on the 4th, 16:14–18:39 on the 5th.", "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 145 minutes on the 4th and 145 of 145 on the 5th.", "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 15713 s" }, { "step": "counted", "text": "Holī is kept the day after Holikā Dahana: Monday 5 March is the day taken above.", "fact": "follows: holika-dahana + 1 d" }, { "step": "ruling", "text": "Holī, Medan, 2091: Tuesday 6 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": "2091-03-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-06", "confidence": "determinate" } ], "quote": "In Medan, Holī 2091 falls on Tuesday 6 March. It is kept the day after Holikā Dahana, which falls on Monday 5 March. Pūrṇimā runs from 02:20 on Mon 5 Mar to 23:01 on Mon 5 Mar and covers all of sāyāhna on the 5th.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vasantotsava", "festival": "vasantotsava", "name": "Vasantotsava", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27277, "anga": { "type": "tithi", "index": 15, "key": "pratipada", "name": "Pratipadā", "start": { "local": "2091-03-05T23:00:32+07:00", "utc": "2091-03-05T16:00:32Z", "ms": 3823948831825.735 }, "end": { "local": "2091-03-06T19:28:52+07:00", "utc": "2091-03-06T12:28:52Z", "ms": 3824022532365.1943 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-05T23:00:32+07:00", "utc": "2091-03-05T16:00:32Z", "ms": 3823948831825.735 }, "end": { "local": "2091-03-06T19:28:52+07:00", "utc": "2091-03-06T12:28:52Z", "ms": 3824022532365.1943 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-03-06", "window": { "start": { "local": "2091-03-06T06:35:08+07:00", "utc": "2091-03-05T23:35:08Z", "ms": 3823976108499.745 }, "end": { "local": "2091-03-06T06:35:08+07:00", "utc": "2091-03-05T23:35:08Z", "ms": 3823976108499.745 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-03-07", "window": { "start": { "local": "2091-03-07T06:34:49+07:00", "utc": "2091-03-06T23:34:49Z", "ms": 3824062488711.4453 }, "end": { "local": "2091-03-07T06:34:49+07:00", "utc": "2091-03-06T23:34:49Z", "ms": 3824062488711.4453 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 23:01 on Mon 5 Mar to 19:29 on Tue 6 Mar.", "fact": "2091-03-05T16:00:32Z → 2091-03-06T12:28:52Z" }, { "step": "kaala", "text": "Sunrise is at 06:35 on the 6th and 06:35 on the 7th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be current at sunrise. It is on the 6th and is not 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: purvaviddha → only-day · margin 27277 s" }, { "step": "ruling", "text": "Vasantotsava, Medan, 2091: Tuesday 6 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": "2091-03-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-06", "confidence": "determinate" } ], "quote": "In Medan, Vasantotsava 2091 falls on Tuesday 6 March. Pratipadā runs from 23:01 on Mon 5 Mar to 19:29 on Tue 6 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-03-08", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31815, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-03-08T12:27:56+07:00", "utc": "2091-03-08T05:27:56Z", "ms": 3824170076035.3037 }, "end": { "local": "2091-03-09T09:17:14+07:00", "utc": "2091-03-09T02:17:14Z", "ms": 3824245033608.6343 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-08T12:27:56+07:00", "utc": "2091-03-08T05:27:56Z", "ms": 3824170076035.3037 }, "end": { "local": "2091-03-09T09:17:14+07:00", "utc": "2091-03-09T02:17:14Z", "ms": 3824245033608.6343 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-03-08", "window": { "start": { "local": "2091-03-08T21:18:11+07:00", "utc": "2091-03-08T14:18:11Z", "ms": 3824201890859.692 }, "end": { "local": "2091-03-08T21:18:11+07:00", "utc": "2091-03-08T14:18:11Z", "ms": 3824201890859.692 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-03-09", "window": { "start": { "local": "2091-03-09T22:14:44+07:00", "utc": "2091-03-09T15:14:44Z", "ms": 3824291684001.9736 }, "end": { "local": "2091-03-09T22:14:44+07:00", "utc": "2091-03-09T15:14:44Z", "ms": 3824291684001.9736 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:28 on Thu 8 Mar to 09:17 on Fri 9 Mar.", "fact": "2091-03-08T05:27:56Z → 2091-03-09T02:17:14Z" }, { "step": "kaala", "text": "Moonrise is at 21:18 on the 8th and 22:15 on the 9th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 8th and is not on the 9th.", "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 31815 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Thursday 8 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": "2091-03-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-08", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Thursday 8 March. Caturthī runs from 12:28 on Thu 8 Mar to 09:17 on Fri 9 Mar and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-03-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shitalashtami", "festival": "shitalashtami", "name": "Śītalāṣṭamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34416, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-03-12T02:37:44+07:00", "utc": "2091-03-11T19:37:44Z", "ms": 3824480264206.552 }, "end": { "local": "2091-03-13T01:39:25+07:00", "utc": "2091-03-12T18:39:25Z", "ms": 3824563165185.056 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-12T02:37:44+07:00", "utc": "2091-03-11T19:37:44Z", "ms": 3824480264206.552 }, "end": { "local": "2091-03-13T01:39:25+07:00", "utc": "2091-03-12T18:39:25Z", "ms": 3824563165185.056 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-12", "window": { "start": { "local": "2091-03-12T12:11:20+07:00", "utc": "2091-03-12T05:11:20Z", "ms": 3824514679929.407 }, "end": { "local": "2091-03-12T12:59:20+07:00", "utc": "2091-03-12T05:59:20Z", "ms": 3824517559929.407 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-03-13", "window": { "start": { "local": "2091-03-13T12:11:04+07:00", "utc": "2091-03-13T05:11:04Z", "ms": 3824601063879.5967 }, "end": { "local": "2091-03-13T12:59:04+07:00", "utc": "2091-03-13T05:59:04Z", "ms": 3824603943879.5967 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 02:38 on Mon 12 Mar to 01:39 on Tue 13 Mar.", "fact": "2091-03-11T19:37:44Z → 2091-03-12T18:39:25Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:11–12:59 on the 12th, 12:11–12:59 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 0 of 48 on the 13th.", "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 34416 s" }, { "step": "ruling", "text": "Śītalāṣṭamī, Medan, 2091: Monday 12 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shitalashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Sitalastami, (purvaviddha)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-03-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-12", "confidence": "determinate" } ], "quote": "In Medan, Śītalāṣṭamī 2091 falls on Monday 12 March. Aṣṭamī runs from 02:38 on Mon 12 Mar to 01:39 on Tue 13 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-03-15", "festival": "ekadashi", "name": "Pāpamocanī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13775, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-03-15T01:43:58+07:00", "utc": "2091-03-14T18:43:58Z", "ms": 3824736237878.368 }, "end": { "local": "2091-03-16T02:42:00+07:00", "utc": "2091-03-15T19:42:00Z", "ms": 3824826119932.1255 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-15T01:43:58+07:00", "utc": "2091-03-14T18:43:58Z", "ms": 3824736237878.368 }, "end": { "local": "2091-03-16T02:42:00+07:00", "utc": "2091-03-15T19:42:00Z", "ms": 3824826119932.1255 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-03-15", "window": { "start": { "local": "2091-03-15T06:31:58+07:00", "utc": "2091-03-14T23:31:58Z", "ms": 3824753517860.5825 }, "end": { "local": "2091-03-15T06:31:58+07:00", "utc": "2091-03-14T23:31:58Z", "ms": 3824753517860.5825 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-03-16", "window": { "start": { "local": "2091-03-16T06:31:35+07:00", "utc": "2091-03-15T23:31:35Z", "ms": 3824839895264.966 }, "end": { "local": "2091-03-16T06:31:35+07:00", "utc": "2091-03-15T23:31:35Z", "ms": 3824839895264.966 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 01:44 on Thu 15 Mar to 02:42 on Fri 16 Mar.", "fact": "2091-03-14T18:43:58Z → 2091-03-15T19:42:00Z" }, { "step": "kaala", "text": "Sunrise is at 06:32 on the 15th and 06:32 on the 16th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 15th and is not 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 13775 s" }, { "step": "ruling", "text": "Pāpamocanī Ekādaśī, Medan, 2091: Thursday 15 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": "2091-03-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-15", "confidence": "determinate" } ], "quote": "In Medan, Pāpamocanī Ekādaśī 2091 falls on Thursday 15 March. Ekādaśī runs from 01:44 on Thu 15 Mar to 02:42 on Fri 16 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-03-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-03-17", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28742, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-03-17T04:11:10+07:00", "utc": "2091-03-16T21:11:10Z", "ms": 3824917869871.6084 }, "end": { "local": "2091-03-18T06:05:45+07:00", "utc": "2091-03-17T23:05:45Z", "ms": 3825011145185.2397 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-17T04:11:10+07:00", "utc": "2091-03-16T21:11:10Z", "ms": 3824917869871.6084 }, "end": { "local": "2091-03-18T06:05:45+07:00", "utc": "2091-03-17T23:05:45Z", "ms": 3825011145185.2397 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-03-16", "window": { "start": { "local": "2091-03-16T18:36:53+07:00", "utc": "2091-03-16T11:36:53Z", "ms": 3824883413347.8716 }, "end": { "local": "2091-03-16T20:12:08+07:00", "utc": "2091-03-16T13:12:08Z", "ms": 3824889127896.143 } }, "covered_min": 0, "window_min": 95, "qualifies": false }, { "local_date": "2091-03-17", "window": { "start": { "local": "2091-03-17T18:36:42+07:00", "utc": "2091-03-17T11:36:42Z", "ms": 3824969802275.763 }, "end": { "local": "2091-03-17T20:11:55+07:00", "utc": "2091-03-17T13:11:55Z", "ms": 3824975515234.19 } }, "covered_min": 95, "window_min": 95, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:11 on Sat 17 Mar to 06:06 on Sun 18 Mar.", "fact": "2091-03-16T21:11:10Z → 2091-03-17T23:05:45Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:37–20:12 on the 16th, 18:37–20:12 on the 17th.", "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 95 minutes on the 16th and 95 of 95 on the 17th.", "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 28742 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Saturday 17 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": "2091-03-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-17", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Saturday 17 March. Trayodaśī runs from 04:11 on Sat 17 Mar to 06:06 on Sun 18 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-03-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-03-18", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18479, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-03-18T06:05:45+07:00", "utc": "2091-03-17T23:05:45Z", "ms": 3825011145185.2397 }, "end": { "local": "2091-03-19T08:19:49+07:00", "utc": "2091-03-19T01:19:49Z", "ms": 3825105588952.808 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-18T06:05:45+07:00", "utc": "2091-03-17T23:05:45Z", "ms": 3825011145185.2397 }, "end": { "local": "2091-03-19T08:19:49+07:00", "utc": "2091-03-19T01:19:49Z", "ms": 3825105588952.808 } }, "kaala": "nishita", "days": [ { "local_date": "2091-03-17", "window": { "start": { "local": "2091-03-18T00:09:46+07:00", "utc": "2091-03-17T17:09:46Z", "ms": 3824989785869.8643 }, "end": { "local": "2091-03-18T00:57:46+07:00", "utc": "2091-03-17T17:57:46Z", "ms": 3824992665869.8643 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-03-18", "window": { "start": { "local": "2091-03-19T00:09:29+07:00", "utc": "2091-03-18T17:09:29Z", "ms": 3825076168667.3286 }, "end": { "local": "2091-03-19T00:57:29+07:00", "utc": "2091-03-18T17:57:29Z", "ms": 3825079048667.3286 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 06:06 on Sun 18 Mar to 08:20 on Mon 19 Mar.", "fact": "2091-03-17T23:05:45Z → 2091-03-19T01:19:49Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:10–00:58 on the 17th, 00:09–00:57 on the 18th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18479 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Sunday 18 March.", "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": "2091-03-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-18", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Sunday 18 March. Caturdaśī runs from 06:06 on Sun 18 Mar to 08:20 on Mon 19 Mar and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-03-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/navaratra-arambha-caitra", "festival": "navaratra-arambha-caitra", "name": "Navarātrārambha (Caitra)", "everyday": "Chaitra Navratri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1566, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "2091-03-20T10:47:28+07:00", "utc": "2091-03-20T03:47:28Z", "ms": 3825200848355.6504 }, "end": { "local": "2091-03-21T13:22:54+07:00", "utc": "2091-03-21T06:22:54Z", "ms": 3825296574141.0713 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-20T10:47:28+07:00", "utc": "2091-03-20T03:47:28Z", "ms": 3825200848355.6504 }, "end": { "local": "2091-03-21T13:22:54+07:00", "utc": "2091-03-21T06:22:54Z", "ms": 3825296574141.0713 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-20", "window": { "start": { "local": "2091-03-20T12:09:06+07:00", "utc": "2091-03-20T05:09:06Z", "ms": 3825205745555.202 }, "end": { "local": "2091-03-20T12:57:06+07:00", "utc": "2091-03-20T05:57:06Z", "ms": 3825208625555.202 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-03-21", "window": { "start": { "local": "2091-03-21T12:08:48+07:00", "utc": "2091-03-21T05:08:48Z", "ms": 3825292128009.6743 }, "end": { "local": "2091-03-21T12:56:48+07:00", "utc": "2091-03-21T05:56:48Z", "ms": 3825295008009.6743 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 10:47 on Tue 20 Mar to 13:23 on Wed 21 Mar.", "fact": "2091-03-20T03:47:28Z → 2091-03-21T06:22:54Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 20th, 12:09–12:57 on the 21st.", "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 20th and 48 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both middays qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 1566 s" }, { "step": "ruling", "text": "Navarātrārambha (Caitra), Medan, 2091: Wednesday 21 March.", "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": "2091-03-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-21", "confidence": "determinate" } ], "quote": "In Medan, Navarātrārambha (Caitra) (Chaitra Navratri) 2091 falls on Wednesday 21 March. Pratipadā runs from 10:47 on Tue 20 Mar to 13:23 on Wed 21 Mar and covers all of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/gauri-tritiya", "festival": "gauri-tritiya", "name": "Gaurī Tṛtīyā", "everyday": "Gangaur", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11015, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-03-22T16:00:05+07:00", "utc": "2091-03-22T09:00:05Z", "ms": 3825392405035.3794 }, "end": { "local": "2091-03-23T18:32:27+07:00", "utc": "2091-03-23T11:32:27Z", "ms": 3825487947002.5337 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-22T16:00:05+07:00", "utc": "2091-03-22T09:00:05Z", "ms": 3825392405035.3794 }, "end": { "local": "2091-03-23T18:32:27+07:00", "utc": "2091-03-23T11:32:27Z", "ms": 3825487947002.5337 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-22", "window": { "start": { "local": "2091-03-22T12:08:30+07:00", "utc": "2091-03-22T05:08:30Z", "ms": 3825378510355.6255 }, "end": { "local": "2091-03-22T12:56:30+07:00", "utc": "2091-03-22T05:56:30Z", "ms": 3825381390355.6255 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-03-23", "window": { "start": { "local": "2091-03-23T12:08:13+07:00", "utc": "2091-03-23T05:08:13Z", "ms": 3825464892610.4424 }, "end": { "local": "2091-03-23T12:56:13+07:00", "utc": "2091-03-23T05:56:13Z", "ms": 3825467772610.4424 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 16:00 on Thu 22 Mar to 18:32 on Fri 23 Mar.", "fact": "2091-03-22T09:00:05Z → 2091-03-23T11:32:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 22nd, 12:08–12:56 on the 23rd.", "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 22nd and 48 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11015 s" }, { "step": "ruling", "text": "Gaurī Tṛtīyā, Medan, 2091: Friday 23 March.", "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": "2091-03-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-23", "confidence": "determinate" } ], "quote": "In Medan, Gaurī Tṛtīyā (Gangaur) 2091 falls on Friday 23 March. Tṛtīyā runs from 16:00 on Thu 22 Mar to 18:32 on Fri 23 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/saubhagya-shayana-vrata", "festival": "saubhagya-shayana-vrata", "name": "Saubhāgya Śayana Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11015, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-03-22T16:00:05+07:00", "utc": "2091-03-22T09:00:05Z", "ms": 3825392405035.3794 }, "end": { "local": "2091-03-23T18:32:27+07:00", "utc": "2091-03-23T11:32:27Z", "ms": 3825487947002.5337 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-22T16:00:05+07:00", "utc": "2091-03-22T09:00:05Z", "ms": 3825392405035.3794 }, "end": { "local": "2091-03-23T18:32:27+07:00", "utc": "2091-03-23T11:32:27Z", "ms": 3825487947002.5337 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-22", "window": { "start": { "local": "2091-03-22T12:08:30+07:00", "utc": "2091-03-22T05:08:30Z", "ms": 3825378510355.6255 }, "end": { "local": "2091-03-22T12:56:30+07:00", "utc": "2091-03-22T05:56:30Z", "ms": 3825381390355.6255 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-03-23", "window": { "start": { "local": "2091-03-23T12:08:13+07:00", "utc": "2091-03-23T05:08:13Z", "ms": 3825464892610.4424 }, "end": { "local": "2091-03-23T12:56:13+07:00", "utc": "2091-03-23T05:56:13Z", "ms": 3825467772610.4424 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 16:00 on Thu 22 Mar to 18:32 on Fri 23 Mar.", "fact": "2091-03-22T09:00:05Z → 2091-03-23T11:32:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:09–12:57 on the 22nd, 12:08–12:56 on the 23rd.", "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 22nd and 48 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 11015 s" }, { "step": "ruling", "text": "Saubhāgya Śayana Vrata, Medan, 2091: Friday 23 March.", "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": "2091-03-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-23", "confidence": "determinate" } ], "quote": "In Medan, Saubhāgya Śayana Vrata 2091 falls on Friday 23 March. Tṛtīyā runs from 16:00 on Thu 22 Mar to 18:32 on Fri 23 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-03-24", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20174, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-03-23T18:32:27+07:00", "utc": "2091-03-23T11:32:27Z", "ms": 3825487947002.5337 }, "end": { "local": "2091-03-24T20:52:40+07:00", "utc": "2091-03-24T13:52:40Z", "ms": 3825582760016.905 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-23T18:32:27+07:00", "utc": "2091-03-23T11:32:27Z", "ms": 3825487947002.5337 }, "end": { "local": "2091-03-24T20:52:40+07:00", "utc": "2091-03-24T13:52:40Z", "ms": 3825582760016.905 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-23", "window": { "start": { "local": "2091-03-23T12:08:13+07:00", "utc": "2091-03-23T05:08:13Z", "ms": 3825464892610.4424 }, "end": { "local": "2091-03-23T12:56:13+07:00", "utc": "2091-03-23T05:56:13Z", "ms": 3825467772610.4424 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-03-24", "window": { "start": { "local": "2091-03-24T12:07:55+07:00", "utc": "2091-03-24T05:07:55Z", "ms": 3825551274791.6406 }, "end": { "local": "2091-03-24T12:55:55+07:00", "utc": "2091-03-24T05:55:55Z", "ms": 3825554154791.6406 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:32 on Fri 23 Mar to 20:53 on Sat 24 Mar.", "fact": "2091-03-23T11:32:27Z → 2091-03-24T13:52:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 23rd, 12:08–12:56 on the 24th.", "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 23rd and 48 of 48 on the 24th.", "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 20174 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Saturday 24 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": "2091-03-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-24", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Saturday 24 March. Caturthī runs from 18:32 on Fri 23 Mar to 20:53 on Sat 24 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-03-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/lakshmi-panchami", "festival": "lakshmi-panchami", "name": "Lakṣmī Pañcamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28605, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-03-24T20:52:40+07:00", "utc": "2091-03-24T13:52:40Z", "ms": 3825582760016.905 }, "end": { "local": "2091-03-25T22:52:44+07:00", "utc": "2091-03-25T15:52:44Z", "ms": 3825676363679.6035 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-24T20:52:40+07:00", "utc": "2091-03-24T13:52:40Z", "ms": 3825582760016.905 }, "end": { "local": "2091-03-25T22:52:44+07:00", "utc": "2091-03-25T15:52:44Z", "ms": 3825676363679.6035 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-24", "window": { "start": { "local": "2091-03-24T12:07:55+07:00", "utc": "2091-03-24T05:07:55Z", "ms": 3825551274791.6406 }, "end": { "local": "2091-03-24T12:55:55+07:00", "utc": "2091-03-24T05:55:55Z", "ms": 3825554154791.6406 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-03-25", "window": { "start": { "local": "2091-03-25T12:07:37+07:00", "utc": "2091-03-25T05:07:37Z", "ms": 3825637656916.9033 }, "end": { "local": "2091-03-25T12:55:37+07:00", "utc": "2091-03-25T05:55:37Z", "ms": 3825640536916.9033 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 20:53 on Sat 24 Mar to 22:53 on Sun 25 Mar.", "fact": "2091-03-24T13:52:40Z → 2091-03-25T15:52:44Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 24th, 12:08–12:56 on the 25th.", "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 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 28605 s" }, { "step": "ruling", "text": "Lakṣmī Pañcamī, Medan, 2091: Sunday 25 March.", "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": "2091-03-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-25", "confidence": "determinate" } ], "quote": "In Medan, Lakṣmī Pañcamī 2091 falls on Sunday 25 March. Pañcamī runs from 20:53 on Sat 24 Mar to 22:53 on Sun 25 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/bhavani-utpatti", "festival": "bhavani-utpatti", "name": "Bhavānī Utpatti", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37921, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-03-28T01:20:19+07:00", "utc": "2091-03-27T18:20:19Z", "ms": 3825858018845.9517 }, "end": { "local": "2091-03-29T01:34:25+07:00", "utc": "2091-03-28T18:34:25Z", "ms": 3825945264668.306 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-28T01:20:19+07:00", "utc": "2091-03-27T18:20:19Z", "ms": 3825858018845.9517 }, "end": { "local": "2091-03-29T01:34:25+07:00", "utc": "2091-03-28T18:34:25Z", "ms": 3825945264668.306 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-28", "window": { "start": { "local": "2091-03-28T12:06:43+07:00", "utc": "2091-03-28T05:06:43Z", "ms": 3825896803137.1934 }, "end": { "local": "2091-03-28T12:54:43+07:00", "utc": "2091-03-28T05:54:43Z", "ms": 3825899683137.1934 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-03-29", "window": { "start": { "local": "2091-03-29T12:06:25+07:00", "utc": "2091-03-29T05:06:25Z", "ms": 3825983185220.374 }, "end": { "local": "2091-03-29T12:54:25+07:00", "utc": "2091-03-29T05:54:25Z", "ms": 3825986065220.374 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 01:20 on Wed 28 Mar to 01:34 on Thu 29 Mar.", "fact": "2091-03-27T18:20:19Z → 2091-03-28T18:34:25Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:07–12:55 on the 28th, 12:06–12:54 on the 29th.", "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 28th and 0 of 48 on the 29th.", "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 37921 s" }, { "step": "ruling", "text": "Bhavānī Utpatti, Medan, 2091: Wednesday 28 March.", "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": "2091-03-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-28", "confidence": "determinate" } ], "quote": "In Medan, Bhavānī Utpatti 2091 falls on Wednesday 28 March. Aṣṭamī runs from 01:20 on Wed 28 Mar to 01:34 on Thu 29 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/rama-navami", "festival": "rama-navami", "name": "Rāma Navamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37921, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "2091-03-29T01:34:25+07:00", "utc": "2091-03-28T18:34:25Z", "ms": 3825945264668.306 }, "end": { "local": "2091-03-30T01:03:15+07:00", "utc": "2091-03-29T18:03:15Z", "ms": 3826029795425.0356 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-29T01:34:25+07:00", "utc": "2091-03-28T18:34:25Z", "ms": 3825945264668.306 }, "end": { "local": "2091-03-30T01:03:15+07:00", "utc": "2091-03-29T18:03:15Z", "ms": 3826029795425.0356 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-03-29", "window": { "start": { "local": "2091-03-29T12:06:25+07:00", "utc": "2091-03-29T05:06:25Z", "ms": 3825983185220.374 }, "end": { "local": "2091-03-29T12:54:25+07:00", "utc": "2091-03-29T05:54:25Z", "ms": 3825986065220.374 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-03-30", "window": { "start": { "local": "2091-03-30T12:06:07+07:00", "utc": "2091-03-30T05:06:07Z", "ms": 3826069567340.3564 }, "end": { "local": "2091-03-30T12:54:07+07:00", "utc": "2091-03-30T05:54:07Z", "ms": 3826072447340.3564 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 01:34 on Thu 29 Mar to 01:03 on Fri 30 Mar.", "fact": "2091-03-28T18:34:25Z → 2091-03-29T18:03:15Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:06–12:54 on the 29th, 12:06–12:54 on the 30th.", "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 29th and 0 of 48 on the 30th.", "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 37921 s" }, { "step": "ruling", "text": "Rāma Navamī, Medan, 2091: Thursday 29 March.", "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": "2091-03-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-29", "confidence": "determinate" } ], "quote": "In Medan, Rāma Navamī 2091 falls on Thursday 29 March. Navamī runs from 01:34 on Thu 29 Mar to 01:03 on Fri 30 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-03-31", "festival": "ekadashi", "name": "Kāmadā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-03-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23968, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-03-30T23:46:14+07:00", "utc": "2091-03-30T16:46:14Z", "ms": 3826111573892.787 }, "end": { "local": "2091-03-31T21:45:36+07:00", "utc": "2091-03-31T14:45:36Z", "ms": 3826190736458.8433 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-03-30T23:46:14+07:00", "utc": "2091-03-30T16:46:14Z", "ms": 3826111573892.787 }, "end": { "local": "2091-03-31T21:45:36+07:00", "utc": "2091-03-31T14:45:36Z", "ms": 3826190736458.8433 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-03-31", "window": { "start": { "local": "2091-03-31T06:25:42+07:00", "utc": "2091-03-30T23:25:42Z", "ms": 3826135541549.5845 }, "end": { "local": "2091-03-31T06:25:42+07:00", "utc": "2091-03-30T23:25:42Z", "ms": 3826135541549.5845 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-04-01", "window": { "start": { "local": "2091-04-01T06:25:18+07:00", "utc": "2091-03-31T23:25:18Z", "ms": 3826221917844.067 }, "end": { "local": "2091-04-01T06:25:18+07:00", "utc": "2091-03-31T23:25:18Z", "ms": 3826221917844.067 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 23:46 on Fri 30 Mar to 21:46 on Sat 31 Mar.", "fact": "2091-03-30T16:46:14Z → 2091-03-31T14:45:36Z" }, { "step": "kaala", "text": "Sunrise is at 06:26 on the 31st and 06:25 on the 1st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 31st 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 23968 s" }, { "step": "ruling", "text": "Kāmadā Ekādaśī, Medan, 2091: Saturday 31 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": "2091-03-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-03-31", "confidence": "determinate" } ], "quote": "In Medan, Kāmadā Ekādaśī 2091 falls on Saturday 31 March. Ekādaśī runs from 23:46 on Fri 30 Mar to 21:46 on Sat 31 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-03-31", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-04-01", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1949, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-04-01T19:06:15+07:00", "utc": "2091-04-01T12:06:15Z", "ms": 3826267574988.4976 }, "end": { "local": "2091-04-02T15:55:08+07:00", "utc": "2091-04-02T08:55:08Z", "ms": 3826342507887.972 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-04-01T19:06:15+07:00", "utc": "2091-04-01T12:06:15Z", "ms": 3826267574988.4976 }, "end": { "local": "2091-04-02T15:55:08+07:00", "utc": "2091-04-02T08:55:08Z", "ms": 3826342507887.972 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-04-01", "window": { "start": { "local": "2091-04-01T18:33:46+07:00", "utc": "2091-04-01T11:33:46Z", "ms": 3826265625700.4854 }, "end": { "local": "2091-04-01T20:08:35+07:00", "utc": "2091-04-01T13:08:35Z", "ms": 3826271314839.052 } }, "covered_min": 62, "window_min": 95, "qualifies": true }, { "local_date": "2091-04-02", "window": { "start": { "local": "2091-04-02T18:33:34+07:00", "utc": "2091-04-02T11:33:34Z", "ms": 3826352014015.0645 }, "end": { "local": "2091-04-02T20:08:22+07:00", "utc": "2091-04-02T13:08:22Z", "ms": 3826357701581.1177 } }, "covered_min": 0, "window_min": 95, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:06 on Sun 1 Apr to 15:55 on Mon 2 Apr.", "fact": "2091-04-01T12:06:15Z → 2091-04-02T08:55:08Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:34–20:09 on the 1st, 18:34–20:08 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 62 of 95 minutes on the 1st and 0 of 95 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 1949 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Sunday 1 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": "2091-04-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-01", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Sunday 1 April. Trayodaśī runs from 19:06 on Sun 1 Apr to 15:55 on Mon 2 Apr and covers 62 of 95 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-04-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ananga-trayodashi", "festival": "ananga-trayodashi", "name": "Anaṅga Trayodaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10914, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-04-01T19:06:15+07:00", "utc": "2091-04-01T12:06:15Z", "ms": 3826267574988.4976 }, "end": { "local": "2091-04-02T15:55:08+07:00", "utc": "2091-04-02T08:55:08Z", "ms": 3826342507887.972 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-04-01T19:06:15+07:00", "utc": "2091-04-01T12:06:15Z", "ms": 3826267574988.4976 }, "end": { "local": "2091-04-02T15:55:08+07:00", "utc": "2091-04-02T08:55:08Z", "ms": 3826342507887.972 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-01", "window": { "start": { "local": "2091-04-01T12:05:32+07:00", "utc": "2091-04-01T05:05:32Z", "ms": 3826242331772.2764 }, "end": { "local": "2091-04-01T12:53:32+07:00", "utc": "2091-04-01T05:53:32Z", "ms": 3826245211772.2764 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-04-02", "window": { "start": { "local": "2091-04-02T12:05:14+07:00", "utc": "2091-04-02T05:05:14Z", "ms": 3826328714127.3994 }, "end": { "local": "2091-04-02T12:53:14+07:00", "utc": "2091-04-02T05:53:14Z", "ms": 3826331594127.3994 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:06 on Sun 1 Apr to 15:55 on Mon 2 Apr.", "fact": "2091-04-01T12:06:15Z → 2091-04-02T08:55:08Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:06–12:54 on the 1st, 12:05–12:53 on the 2nd.", "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 1st and 48 of 48 on the 2nd.", "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 10914 s" }, { "step": "ruling", "text": "Anaṅga Trayodaśī, Medan, 2091: Monday 2 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": "2091-04-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-02", "confidence": "determinate" } ], "quote": "In Medan, Anaṅga Trayodaśī 2091 falls on Monday 2 April. Trayodaśī runs from 19:06 on Sun 1 Apr to 15:55 on Mon 2 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vishnu-damanaka-chaturdashi", "festival": "vishnu-damanaka-chaturdashi", "name": "Viṣṇudamanaka Caturdaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 952, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-04-02T15:55:08+07:00", "utc": "2091-04-02T08:55:08Z", "ms": 3826342507887.972 }, "end": { "local": "2091-04-03T12:20:49+07:00", "utc": "2091-04-03T05:20:49Z", "ms": 3826416048691.4995 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-04-02T15:55:08+07:00", "utc": "2091-04-02T08:55:08Z", "ms": 3826342507887.972 }, "end": { "local": "2091-04-03T12:20:49+07:00", "utc": "2091-04-03T05:20:49Z", "ms": 3826416048691.4995 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-02", "window": { "start": { "local": "2091-04-02T12:05:14+07:00", "utc": "2091-04-02T05:05:14Z", "ms": 3826328714127.3994 }, "end": { "local": "2091-04-02T12:53:14+07:00", "utc": "2091-04-02T05:53:14Z", "ms": 3826331594127.3994 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-04-03", "window": { "start": { "local": "2091-04-03T12:04:57+07:00", "utc": "2091-04-03T05:04:57Z", "ms": 3826415096605.7607 }, "end": { "local": "2091-04-03T12:52:57+07:00", "utc": "2091-04-03T05:52:57Z", "ms": 3826417976605.7607 } }, "covered_min": 16, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 15:55 on Mon 2 Apr to 12:21 on Tue 3 Apr.", "fact": "2091-04-02T08:55:08Z → 2091-04-03T05:20:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 2nd, 12:05–12:53 on the 3rd.", "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 2nd and 16 of 48 on the 3rd.", "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 952 s" }, { "step": "ruling", "text": "Viṣṇudamanaka Caturdaśī, Medan, 2091: Tuesday 3 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": "2091-04-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-03", "confidence": "determinate" } ], "quote": "In Medan, Viṣṇudamanaka Caturdaśī 2091 falls on Tuesday 3 April. Caturdaśī runs from 15:55 on Mon 2 Apr to 12:21 on Tue 3 Apr and covers 16 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/chaitri-purnima", "festival": "chaitri-purnima", "name": "Caitrī Pūrṇimā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 952, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-04-03T12:20:49+07:00", "utc": "2091-04-03T05:20:49Z", "ms": 3826416048691.4995 }, "end": { "local": "2091-04-04T08:32:57+07:00", "utc": "2091-04-04T01:32:57Z", "ms": 3826488777201.5664 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "2091-04-03T12:20:49+07:00", "utc": "2091-04-03T05:20:49Z", "ms": 3826416048691.4995 }, "end": { "local": "2091-04-04T08:32:57+07:00", "utc": "2091-04-04T01:32:57Z", "ms": 3826488777201.5664 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-03", "window": { "start": { "local": "2091-04-03T12:04:57+07:00", "utc": "2091-04-03T05:04:57Z", "ms": 3826415096605.7607 }, "end": { "local": "2091-04-03T12:52:57+07:00", "utc": "2091-04-03T05:52:57Z", "ms": 3826417976605.7607 } }, "covered_min": 32, "window_min": 48, "qualifies": true }, { "local_date": "2091-04-04", "window": { "start": { "local": "2091-04-04T12:04:39+07:00", "utc": "2091-04-04T05:04:39Z", "ms": 3826501479231.166 }, "end": { "local": "2091-04-04T12:52:39+07:00", "utc": "2091-04-04T05:52:39Z", "ms": 3826504359231.166 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 12:21 on Tue 3 Apr to 08:33 on Wed 4 Apr.", "fact": "2091-04-03T05:20:49Z → 2091-04-04T01:32:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 3rd, 12:05–12:53 on the 4th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 32 of 48 minutes on the 3rd and 0 of 48 on the 4th.", "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 952 s" }, { "step": "ruling", "text": "Caitrī Pūrṇimā, Medan, 2091: Tuesday 3 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": "2091-04-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-03", "confidence": "determinate" } ], "quote": "In Medan, Caitrī Pūrṇimā 2091 falls on Tuesday 3 April. Pūrṇimā runs from 12:21 on Tue 3 Apr to 08:33 on Wed 4 Apr and covers 32 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-04-06", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-06", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 2154, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-04-06T21:32:51+07:00", "utc": "2091-04-06T14:32:51Z", "ms": 3826708371439.012 }, "end": { "local": "2091-04-07T18:35:30+07:00", "utc": "2091-04-07T11:35:30Z", "ms": 3826784130336.896 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-06T21:32:51+07:00", "utc": "2091-04-06T14:32:51Z", "ms": 3826708371439.012 }, "end": { "local": "2091-04-07T18:35:30+07:00", "utc": "2091-04-07T11:35:30Z", "ms": 3826784130336.896 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-04-06", "window": { "start": { "local": "2091-04-06T20:56:58+07:00", "utc": "2091-04-06T13:56:58Z", "ms": 3826706217914.42 }, "end": { "local": "2091-04-06T20:56:58+07:00", "utc": "2091-04-06T13:56:58Z", "ms": 3826706217914.42 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-04-07", "window": { "start": { "local": "2091-04-07T21:55:24+07:00", "utc": "2091-04-07T14:55:24Z", "ms": 3826796124170.002 }, "end": { "local": "2091-04-07T21:55:24+07:00", "utc": "2091-04-07T14:55:24Z", "ms": 3826796124170.002 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:33 on Fri 6 Apr to 18:36 on Sat 7 Apr.", "fact": "2091-04-06T14:32:51Z → 2091-04-07T11:35:30Z" }, { "step": "kaala", "text": "Moonrise is at 20:57 on the 6th and 21:55 on the 7th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 6th and is not on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither moonrise qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 2154 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Friday 6 April.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-04-06", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-06", "confidence": "boundary" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Friday 6 April. Caturthī runs from 21:33 on Fri 6 Apr to 18:36 on Sat 7 Apr, and is current at moonrise on neither day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-04-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/vaishakhi", "festival": "vaishakhi", "name": "Vaiśākhī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12841, "anga": { "type": "sankranti", "index": 0, "key": "mesha", "name": "Meṣa", "start": { "local": "2091-04-15T02:46:07+07:00", "utc": "2091-04-14T19:46:07Z", "ms": 3827418366640.4883 }, "end": { "local": "2091-05-15T23:32:11+07:00", "utc": "2091-05-15T16:32:11Z", "ms": 3830085131058.187 } }, "span": { "of": "transit", "start": { "local": "2091-04-15T02:46:07+07:00", "utc": "2091-04-14T19:46:07Z", "ms": 3827418366640.4883 }, "end": { "local": "2091-04-15T02:46:07+07:00", "utc": "2091-04-14T19:46:07Z", "ms": 3827418366640.4883 } }, "kaala": "day", "days": [ { "local_date": "2091-04-14", "window": { "start": { "local": "2091-04-14T06:20:27+07:00", "utc": "2091-04-13T23:20:27Z", "ms": 3827344827483.2974 }, "end": { "local": "2091-04-15T06:20:07+07:00", "utc": "2091-04-14T23:20:07Z", "ms": 3827431207256.9243 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "2091-04-15", "window": { "start": { "local": "2091-04-15T06:20:07+07:00", "utc": "2091-04-14T23:20:07Z", "ms": 3827431207256.9243 }, "end": { "local": "2091-04-16T06:19:47+07:00", "utc": "2091-04-15T23:19:47Z", "ms": 3827517587417.5435 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Meṣa at 02:46 on Sun 15 Apr.", "fact": "2091-04-14T19:46:07Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 06:20 on the 14th, and from 06:20 on the 15th.", "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 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 sunrise → only-day · margin 12841 s" }, { "step": "ruling", "text": "Vaiśākhī, Medan, 2091: Saturday 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": "2091-04-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "2091-04-15", "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": "sunset-rule", "local_date": "2091-04-15", "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 Medan, Vaiśākhī 2091 falls on Saturday 14 April. The Sun enters Meṣa at 02:46 on Sun 15 Apr, and the rule counts the day from sunrise. Counted from midnight, or by the Tamil rule for the first day of a solar month, which gives a transit after sunset to the next day, it is 15 April.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-04-14", "festival": "ekadashi", "name": "Varūthinī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35508, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-04-13T16:12:36+07:00", "utc": "2091-04-13T09:12:36Z", "ms": 3827293955834.105 }, "end": { "local": "2091-04-14T18:14:07+07:00", "utc": "2091-04-14T11:14:07Z", "ms": 3827387647302.487 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-13T16:12:36+07:00", "utc": "2091-04-13T09:12:36Z", "ms": 3827293955834.105 }, "end": { "local": "2091-04-14T18:14:07+07:00", "utc": "2091-04-14T11:14:07Z", "ms": 3827387647302.487 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-04-13", "window": { "start": { "local": "2091-04-13T06:20:48+07:00", "utc": "2091-04-12T23:20:48Z", "ms": 3827258448082.1514 }, "end": { "local": "2091-04-13T06:20:48+07:00", "utc": "2091-04-12T23:20:48Z", "ms": 3827258448082.1514 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-04-14", "window": { "start": { "local": "2091-04-14T06:20:27+07:00", "utc": "2091-04-13T23:20:27Z", "ms": 3827344827483.2974 }, "end": { "local": "2091-04-14T06:20:27+07:00", "utc": "2091-04-13T23:20:27Z", "ms": 3827344827483.2974 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:13 on Fri 13 Apr to 18:14 on Sat 14 Apr.", "fact": "2091-04-13T09:12:36Z → 2091-04-14T11:14:07Z" }, { "step": "kaala", "text": "Sunrise is at 06:21 on the 13th and 06:20 on the 14th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 13th and is on the 14th.", "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 35508 s" }, { "step": "ruling", "text": "Varūthinī Ekādaśī, Medan, 2091: Saturday 14 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": "2091-04-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-14", "confidence": "determinate" } ], "quote": "In Medan, Varūthinī Ekādaśī 2091 falls on Saturday 14 April. Ekādaśī runs from 16:13 on Fri 13 Apr to 18:14 on Sat 14 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-04-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-04-16", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1882, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-04-15T20:37:10+07:00", "utc": "2091-04-15T13:37:10Z", "ms": 3827482629980.088 }, "end": { "local": "2091-04-16T23:11:39+07:00", "utc": "2091-04-16T16:11:39Z", "ms": 3827578299063.111 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-15T20:37:10+07:00", "utc": "2091-04-15T13:37:10Z", "ms": 3827482629980.088 }, "end": { "local": "2091-04-16T23:11:39+07:00", "utc": "2091-04-16T16:11:39Z", "ms": 3827578299063.111 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-04-15", "window": { "start": { "local": "2091-04-15T18:31:21+07:00", "utc": "2091-04-15T11:31:21Z", "ms": 3827475080757.03 }, "end": { "local": "2091-04-15T20:05:48+07:00", "utc": "2091-04-15T13:05:48Z", "ms": 3827480748311.765 } }, "covered_min": 0, "window_min": 94, "qualifies": false }, { "local_date": "2091-04-16", "window": { "start": { "local": "2091-04-16T18:31:13+07:00", "utc": "2091-04-16T11:31:13Z", "ms": 3827561472545.2393 }, "end": { "local": "2091-04-16T20:05:39+07:00", "utc": "2091-04-16T13:05:39Z", "ms": 3827567138603.078 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:37 on Sun 15 Apr to 23:12 on Mon 16 Apr.", "fact": "2091-04-15T13:37:10Z → 2091-04-16T16:11:39Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:31–20:06 on the 15th, 18:31–20:06 on the 16th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 94 minutes on the 15th and 94 of 94 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1882 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Monday 16 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": "2091-04-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-16", "confidence": "boundary" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Monday 16 April. Trayodaśī runs from 20:37 on Sun 15 Apr to 23:12 on Mon 16 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-04-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-04-16", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-16", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 2981, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-04-16T23:11:39+07:00", "utc": "2091-04-16T16:11:39Z", "ms": 3827578299063.111 }, "end": { "local": "2091-04-18T01:48:45+07:00", "utc": "2091-04-17T18:48:45Z", "ms": 3827674125256.3706 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-16T23:11:39+07:00", "utc": "2091-04-16T16:11:39Z", "ms": 3827578299063.111 }, "end": { "local": "2091-04-18T01:48:45+07:00", "utc": "2091-04-17T18:48:45Z", "ms": 3827674125256.3706 } }, "kaala": "nishita", "days": [ { "local_date": "2091-04-16", "window": { "start": { "local": "2091-04-17T00:01:20+07:00", "utc": "2091-04-16T17:01:20Z", "ms": 3827581280262.1353 }, "end": { "local": "2091-04-17T00:49:20+07:00", "utc": "2091-04-16T17:49:20Z", "ms": 3827584160262.1353 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-04-17", "window": { "start": { "local": "2091-04-18T00:01:07+07:00", "utc": "2091-04-17T17:01:07Z", "ms": 3827667666822.3633 }, "end": { "local": "2091-04-18T00:49:07+07:00", "utc": "2091-04-17T17:49:07Z", "ms": 3827670546822.3633 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:12 on Mon 16 Apr to 01:49 on Wed 18 Apr.", "fact": "2091-04-16T16:11:39Z → 2091-04-17T18:48:45Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:01–00:49 on the 16th, 00:01–00:49 on the 17th.", "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 16th and 48 of 48 on the 17th.", "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 2981 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Monday 16 April.", "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": "2091-04-16", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-16", "confidence": "boundary" } ], "quote": "In Medan, Śivarātri 2091 falls on Monday 16 April. Caturdaśī runs from 23:12 on Mon 16 Apr to 01:49 on Wed 18 Apr and covers all of niśītha that night. It also reaches the next night for 48 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-04-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/parashurama-jayanti", "festival": "parashurama-jayanti", "name": "Paraśurāma Jayantī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28046, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-04-21T08:52:42+07:00", "utc": "2091-04-21T01:52:42Z", "ms": 3827958761955.643 }, "end": { "local": "2091-04-22T10:43:06+07:00", "utc": "2091-04-22T03:43:06Z", "ms": 3828051785569.577 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-21T08:52:42+07:00", "utc": "2091-04-21T01:52:42Z", "ms": 3827958761955.643 }, "end": { "local": "2091-04-22T10:43:06+07:00", "utc": "2091-04-22T03:43:06Z", "ms": 3828051785569.577 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-04-21", "window": { "start": { "local": "2091-04-21T18:30:37+07:00", "utc": "2091-04-21T11:30:37Z", "ms": 3827993437024.7803 }, "end": { "local": "2091-04-21T20:04:56+07:00", "utc": "2091-04-21T13:04:56Z", "ms": 3827999095720.8784 } }, "covered_min": 94, "window_min": 94, "qualifies": true }, { "local_date": "2091-04-22", "window": { "start": { "local": "2091-04-22T18:30:31+07:00", "utc": "2091-04-22T11:30:31Z", "ms": 3828079831089.781 }, "end": { "local": "2091-04-22T20:04:48+07:00", "utc": "2091-04-22T13:04:48Z", "ms": 3828085488340.8833 } }, "covered_min": 0, "window_min": 94, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 08:53 on Sat 21 Apr to 10:43 on Sun 22 Apr.", "fact": "2091-04-21T01:52:42Z → 2091-04-22T03:43:06Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:31–20:05 on the 21st, 18:31–20:05 on the 22nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pradoṣa. It covers 94 of 94 minutes on the 21st and 0 of 94 on the 22nd.", "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 28046 s" }, { "step": "ruling", "text": "Paraśurāma Jayantī, Medan, 2091: Saturday 21 April.", "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": "2091-04-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-21", "confidence": "determinate" } ], "quote": "In Medan, Paraśurāma Jayantī 2091 falls on Saturday 21 April. Tṛtīyā runs from 08:53 on Sat 21 Apr to 10:43 on Sun 22 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/akshaya-tritiya", "festival": "akshaya-tritiya", "name": "Akṣaya Tṛtīyā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1257, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-04-21T08:52:42+07:00", "utc": "2091-04-21T01:52:42Z", "ms": 3827958761955.643 }, "end": { "local": "2091-04-22T10:43:06+07:00", "utc": "2091-04-22T03:43:06Z", "ms": 3828051785569.577 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-21T08:52:42+07:00", "utc": "2091-04-21T01:52:42Z", "ms": 3827958761955.643 }, "end": { "local": "2091-04-22T10:43:06+07:00", "utc": "2091-04-22T03:43:06Z", "ms": 3828051785569.577 } }, "kaala": "purvahna", "days": [ { "local_date": "2091-04-21", "window": { "start": { "local": "2091-04-21T06:18:14+07:00", "utc": "2091-04-20T23:18:14Z", "ms": 3827949494491.062 }, "end": { "local": "2091-04-21T10:22:22+07:00", "utc": "2091-04-21T03:22:22Z", "ms": 3827964142002.3013 } }, "covered_min": 90, "window_min": 244, "qualifies": true }, { "local_date": "2091-04-22", "window": { "start": { "local": "2091-04-22T06:17:57+07:00", "utc": "2091-04-21T23:17:57Z", "ms": 3828035877245.5156 }, "end": { "local": "2091-04-22T10:22:09+07:00", "utc": "2091-04-22T03:22:09Z", "ms": 3828050528526.9375 } }, "covered_min": 244, "window_min": 244, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 08:53 on Sat 21 Apr to 10:43 on Sun 22 Apr.", "fact": "2091-04-21T01:52:42Z → 2091-04-22T03:43:06Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:18–10:22 on the 21st, 06:18–10:22 on the 22nd.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pūrvāhṇa. It covers 90 of 244 minutes on the 21st and 244 of 244 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both forenoons qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 1257 s" }, { "step": "ruling", "text": "Akṣaya Tṛtīyā, Medan, 2091: Sunday 22 April.", "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": "2091-04-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-22", "confidence": "determinate" } ], "quote": "In Medan, Akṣaya Tṛtīyā 2091 falls on Sunday 22 April. Tṛtīyā runs from 08:53 on Sat 21 Apr to 10:43 on Sun 22 Apr and covers all of pūrvāhṇa that forenoon. It also reaches the previous forenoon for 90 minutes; by the rule the second forenoon is taken.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-04-22", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-22", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 676, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-04-22T10:43:06+07:00", "utc": "2091-04-22T03:43:06Z", "ms": 3828051785569.577 }, "end": { "local": "2091-04-23T12:11:19+07:00", "utc": "2091-04-23T05:11:19Z", "ms": 3828143479046.8604 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-22T10:43:06+07:00", "utc": "2091-04-22T03:43:06Z", "ms": 3828051785569.577 }, "end": { "local": "2091-04-23T12:11:19+07:00", "utc": "2091-04-23T05:11:19Z", "ms": 3828143479046.8604 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-22", "window": { "start": { "local": "2091-04-22T12:00:14+07:00", "utc": "2091-04-22T05:00:14Z", "ms": 3828056414167.6484 }, "end": { "local": "2091-04-22T12:48:14+07:00", "utc": "2091-04-22T05:48:14Z", "ms": 3828059294167.6484 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-04-23", "window": { "start": { "local": "2091-04-23T12:00:03+07:00", "utc": "2091-04-23T05:00:03Z", "ms": 3828142803017.8574 }, "end": { "local": "2091-04-23T12:48:03+07:00", "utc": "2091-04-23T05:48:03Z", "ms": 3828145683017.8574 } }, "covered_min": 11, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:43 on Sun 22 Apr to 12:11 on Mon 23 Apr.", "fact": "2091-04-22T03:43:06Z → 2091-04-23T05:11:19Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 22nd, 12:00–12:48 on the 23rd.", "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 22nd and 11 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "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 676 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Sunday 22 April.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "2091-04-22", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-22", "confidence": "boundary" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Sunday 22 April. Caturthī runs from 10:43 on Sun 22 Apr to 12:11 on Mon 23 Apr and covers all of madhyāhna that midday. It also reaches the next midday for 11 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/medan/festivals/2091/vinayaka-chaturthi?on=2091-04-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shankara-jayanti", "festival": "shankara-jayanti", "name": "Śaṅkara Jayantī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-24", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 676, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-04-23T12:11:19+07:00", "utc": "2091-04-23T05:11:19Z", "ms": 3828143479046.8604 }, "end": { "local": "2091-04-24T13:13:00+07:00", "utc": "2091-04-24T06:13:00Z", "ms": 3828233579626.0483 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-23T12:11:19+07:00", "utc": "2091-04-23T05:11:19Z", "ms": 3828143479046.8604 }, "end": { "local": "2091-04-24T13:13:00+07:00", "utc": "2091-04-24T06:13:00Z", "ms": 3828233579626.0483 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-23", "window": { "start": { "local": "2091-04-23T12:00:03+07:00", "utc": "2091-04-23T05:00:03Z", "ms": 3828142803017.8574 }, "end": { "local": "2091-04-23T12:48:03+07:00", "utc": "2091-04-23T05:48:03Z", "ms": 3828145683017.8574 } }, "covered_min": 37, "window_min": 48, "qualifies": true }, { "local_date": "2091-04-24", "window": { "start": { "local": "2091-04-24T11:59:52+07:00", "utc": "2091-04-24T04:59:52Z", "ms": 3828229192317.4287 }, "end": { "local": "2091-04-24T12:47:52+07:00", "utc": "2091-04-24T05:47:52Z", "ms": 3828232072317.4287 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 12:11 on Mon 23 Apr to 13:13 on Tue 24 Apr.", "fact": "2091-04-23T05:11:19Z → 2091-04-24T06:13:00Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 23rd, 12:00–12:48 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 37 of 48 minutes on the 23rd and 48 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "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 676 s" }, { "step": "ruling", "text": "Śaṅkara Jayantī, Medan, 2091: Tuesday 24 April.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "2091-04-24", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-24", "confidence": "boundary" } ], "quote": "In Medan, Śaṅkara Jayantī 2091 falls on Tuesday 24 April. Pañcamī runs from 12:11 on Mon 23 Apr to 13:13 on Tue 24 Apr and covers all of madhyāhna that midday. It also reaches the previous midday for 37 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/medan/festivals/2091/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": "/medan/festivals/2091/gangotpatti", "festival": "gangotpatti", "name": "Gaṅgotpatti", "everyday": "Ganga Saptami", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3078, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "2091-04-25T13:43:34+07:00", "utc": "2091-04-25T06:43:34Z", "ms": 3828321813968.7544 }, "end": { "local": "2091-04-26T13:38:50+07:00", "utc": "2091-04-26T06:38:50Z", "ms": 3828407930100.6396 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-25T13:43:34+07:00", "utc": "2091-04-25T06:43:34Z", "ms": 3828321813968.7544 }, "end": { "local": "2091-04-26T13:38:50+07:00", "utc": "2091-04-26T06:38:50Z", "ms": 3828407930100.6396 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-25", "window": { "start": { "local": "2091-04-25T11:59:42+07:00", "utc": "2091-04-25T04:59:42Z", "ms": 3828315582075.052 }, "end": { "local": "2091-04-25T12:47:42+07:00", "utc": "2091-04-25T05:47:42Z", "ms": 3828318462075.052 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-04-26", "window": { "start": { "local": "2091-04-26T11:59:32+07:00", "utc": "2091-04-26T04:59:32Z", "ms": 3828401972299.335 }, "end": { "local": "2091-04-26T12:47:32+07:00", "utc": "2091-04-26T05:47:32Z", "ms": 3828404852299.335 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 13:44 on Wed 25 Apr to 13:39 on Thu 26 Apr.", "fact": "2091-04-25T06:43:34Z → 2091-04-26T06:38:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 25th, 12:00–12:48 on the 26th.", "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 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: purvaviddha → only-day · margin 3078 s" }, { "step": "ruling", "text": "Gaṅgotpatti, Medan, 2091: Thursday 26 April.", "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": "2091-04-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-26", "confidence": "boundary" } ], "quote": "In Medan, Gaṅgotpatti (Ganga Saptami) 2091 falls on Thursday 26 April. Saptamī runs from 13:44 on Wed 25 Apr to 13:39 on Thu 26 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-04-30", "festival": "ekadashi", "name": "Mohinī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2265, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-04-29T09:31:01+07:00", "utc": "2091-04-29T02:31:01Z", "ms": 3828652260571.99 }, "end": { "local": "2091-04-30T06:53:43+07:00", "utc": "2091-04-29T23:53:43Z", "ms": 3828729222617.766 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-29T09:31:01+07:00", "utc": "2091-04-29T02:31:01Z", "ms": 3828652260571.99 }, "end": { "local": "2091-04-30T06:53:43+07:00", "utc": "2091-04-29T23:53:43Z", "ms": 3828729222617.766 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-04-29", "window": { "start": { "local": "2091-04-29T06:16:10+07:00", "utc": "2091-04-28T23:16:10Z", "ms": 3828640570366.149 }, "end": { "local": "2091-04-29T06:16:10+07:00", "utc": "2091-04-28T23:16:10Z", "ms": 3828640570366.149 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-04-30", "window": { "start": { "local": "2091-04-30T06:15:57+07:00", "utc": "2091-04-29T23:15:57Z", "ms": 3828726957203.6343 }, "end": { "local": "2091-04-30T06:15:57+07:00", "utc": "2091-04-29T23:15:57Z", "ms": 3828726957203.6343 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 09:31 on Sun 29 Apr to 06:54 on Mon 30 Apr.", "fact": "2091-04-29T02:31:01Z → 2091-04-29T23:53:43Z" }, { "step": "kaala", "text": "Sunrise is at 06:16 on the 29th and 06:16 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 2265 s" }, { "step": "ruling", "text": "Mohinī Ekādaśī, Medan, 2091: Monday 30 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": "2091-04-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-30", "confidence": "determinate" } ], "quote": "In Medan, Mohinī Ekādaśī 2091 falls on Monday 30 April. Ekādaśī runs from 09:31 on Sun 29 Apr to 06:54 on Mon 30 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-04-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/parashurama-dvadashi", "festival": "parashurama-dvadashi", "name": "Paraśurāma Dvādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18315, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-04-30T06:53:43+07:00", "utc": "2091-04-29T23:53:43Z", "ms": 3828729222617.766 }, "end": { "local": "2091-05-01T03:46:28+07:00", "utc": "2091-04-30T20:46:28Z", "ms": 3828804387603.75 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-30T06:53:43+07:00", "utc": "2091-04-29T23:53:43Z", "ms": 3828729222617.766 }, "end": { "local": "2091-05-01T03:46:28+07:00", "utc": "2091-04-30T20:46:28Z", "ms": 3828804387603.75 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-30", "window": { "start": { "local": "2091-04-30T11:58:58+07:00", "utc": "2091-04-30T04:58:58Z", "ms": 3828747538041.543 }, "end": { "local": "2091-04-30T12:46:58+07:00", "utc": "2091-04-30T05:46:58Z", "ms": 3828750418041.543 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-05-01", "window": { "start": { "local": "2091-05-01T11:58:51+07:00", "utc": "2091-05-01T04:58:51Z", "ms": 3828833930737.082 }, "end": { "local": "2091-05-01T12:46:51+07:00", "utc": "2091-05-01T05:46:51Z", "ms": 3828836810737.082 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 06:54 on Mon 30 Apr to 03:46 on Tue 1 May.", "fact": "2091-04-29T23:53:43Z → 2091-04-30T20:46:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 30th, 11:59–12:47 on the 1st.", "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 30th and 0 of 48 on the 1st.", "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 18315 s" }, { "step": "ruling", "text": "Paraśurāma Dvādaśī, Medan, 2091: Monday 30 April.", "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": "2091-04-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-30", "confidence": "determinate" } ], "quote": "In Medan, Paraśurāma Dvādaśī 2091 falls on Monday 30 April. Dvādaśī runs from 06:54 on Mon 30 Apr to 03:46 on Tue 1 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/rukmini-dvadashi", "festival": "rukmini-dvadashi", "name": "Rukmiṇī Dvādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-04-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18315, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-04-30T06:53:43+07:00", "utc": "2091-04-29T23:53:43Z", "ms": 3828729222617.766 }, "end": { "local": "2091-05-01T03:46:28+07:00", "utc": "2091-04-30T20:46:28Z", "ms": 3828804387603.75 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-04-30T06:53:43+07:00", "utc": "2091-04-29T23:53:43Z", "ms": 3828729222617.766 }, "end": { "local": "2091-05-01T03:46:28+07:00", "utc": "2091-04-30T20:46:28Z", "ms": 3828804387603.75 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-04-30", "window": { "start": { "local": "2091-04-30T11:58:58+07:00", "utc": "2091-04-30T04:58:58Z", "ms": 3828747538041.543 }, "end": { "local": "2091-04-30T12:46:58+07:00", "utc": "2091-04-30T05:46:58Z", "ms": 3828750418041.543 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-05-01", "window": { "start": { "local": "2091-05-01T11:58:51+07:00", "utc": "2091-05-01T04:58:51Z", "ms": 3828833930737.082 }, "end": { "local": "2091-05-01T12:46:51+07:00", "utc": "2091-05-01T05:46:51Z", "ms": 3828836810737.082 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 06:54 on Mon 30 Apr to 03:46 on Tue 1 May.", "fact": "2091-04-29T23:53:43Z → 2091-04-30T20:46:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 30th, 11:59–12:47 on the 1st.", "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 30th and 0 of 48 on the 1st.", "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 18315 s" }, { "step": "ruling", "text": "Rukmiṇī Dvādaśī, Medan, 2091: Monday 30 April.", "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": "2091-04-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-04-30", "confidence": "determinate" } ], "quote": "In Medan, Rukmiṇī Dvādaśī 2091 falls on Monday 30 April. Dvādaśī runs from 06:54 on Mon 30 Apr to 03:46 on Tue 1 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pradosha-vrata?on=2091-05-01", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15166, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-05-01T03:46:28+07:00", "utc": "2091-04-30T20:46:28Z", "ms": 3828804387603.75 }, "end": { "local": "2091-05-02T00:16:47+07:00", "utc": "2091-05-01T17:16:47Z", "ms": 3828878207479.37 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-01T03:46:28+07:00", "utc": "2091-04-30T20:46:28Z", "ms": 3828804387603.75 }, "end": { "local": "2091-05-02T00:16:47+07:00", "utc": "2091-05-01T17:16:47Z", "ms": 3828878207479.37 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-04-30", "window": { "start": { "local": "2091-04-30T18:29:59+07:00", "utc": "2091-04-30T11:29:59Z", "ms": 3828770998879.4517 }, "end": { "local": "2091-04-30T20:04:05+07:00", "utc": "2091-04-30T13:04:05Z", "ms": 3828776644975.8394 } }, "covered_min": 0, "window_min": 94, "qualifies": false }, { "local_date": "2091-05-01", "window": { "start": { "local": "2091-05-01T18:29:57+07:00", "utc": "2091-05-01T11:29:57Z", "ms": 3828857396871.8057 }, "end": { "local": "2091-05-01T20:04:02+07:00", "utc": "2091-05-01T13:04:02Z", "ms": 3828863041632.279 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 03:46 on Tue 1 May to 00:17 on Wed 2 May.", "fact": "2091-04-30T20:46:28Z → 2091-05-01T17:16:47Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:30–20:04 on the 30th, 18:30–20:04 on the 1st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 94 minutes on the 30th and 94 of 94 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 15166 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Tuesday 1 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": "2091-05-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-01", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Tuesday 1 May. Trayodaśī runs from 03:46 on Tue 1 May to 00:17 on Wed 2 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-05-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/nrisimha-chaturdashi", "festival": "nrisimha-chaturdashi", "name": "Nṛsiṃha Caturdaśī", "everyday": "Narasimha Jayanti", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1787, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-05-02T00:16:47+07:00", "utc": "2091-05-01T17:16:47Z", "ms": 3828878207479.37 }, "end": { "local": "2091-05-02T20:33:46+07:00", "utc": "2091-05-02T13:33:46Z", "ms": 3828951226157.112 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-02T00:16:47+07:00", "utc": "2091-05-01T17:16:47Z", "ms": 3828878207479.37 }, "end": { "local": "2091-05-02T20:33:46+07:00", "utc": "2091-05-02T13:33:46Z", "ms": 3828951226157.112 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-05-01", "window": { "start": { "local": "2091-05-01T18:29:57+07:00", "utc": "2091-05-01T11:29:57Z", "ms": 3828857396871.8057 }, "end": { "local": "2091-05-01T20:04:02+07:00", "utc": "2091-05-01T13:04:02Z", "ms": 3828863041632.279 } }, "covered_min": 0, "window_min": 94, "qualifies": false }, { "local_date": "2091-05-02", "window": { "start": { "local": "2091-05-02T18:29:55+07:00", "utc": "2091-05-02T11:29:55Z", "ms": 3828943795341.205 }, "end": { "local": "2091-05-02T20:03:59+07:00", "utc": "2091-05-02T13:03:59Z", "ms": 3828949438780.513 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 00:17 on Wed 2 May to 20:34 on Wed 2 May.", "fact": "2091-05-01T17:16:47Z → 2091-05-02T13:33:46Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:30–20:04 on the 1st, 18:30–20:04 on the 2nd.", "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 94 minutes on the 1st and 94 of 94 on the 2nd.", "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 1787 s" }, { "step": "ruling", "text": "Nṛsiṃha Caturdaśī, Medan, 2091: Wednesday 2 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": "2091-05-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-02", "confidence": "determinate" } ], "quote": "In Medan, Nṛsiṃha Caturdaśī (Narasimha Jayanti) 2091 falls on Wednesday 2 May. Caturdaśī runs from 00:17 on Wed 2 May to 20:34 on Wed 2 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/buddha-purnima", "festival": "buddha-purnima", "name": "Buddha Pūrṇimā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14456, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-05-02T20:33:46+07:00", "utc": "2091-05-02T13:33:46Z", "ms": 3828951226157.112 }, "end": { "local": "2091-05-03T16:47:34+07:00", "utc": "2091-05-03T09:47:34Z", "ms": 3829024053601.845 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-02T20:33:46+07:00", "utc": "2091-05-02T13:33:46Z", "ms": 3828951226157.112 }, "end": { "local": "2091-05-03T16:47:34+07:00", "utc": "2091-05-03T09:47:34Z", "ms": 3829024053601.845 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-05-02", "window": { "start": { "local": "2091-05-02T11:58:44+07:00", "utc": "2091-05-02T04:58:44Z", "ms": 3828920323958.2803 }, "end": { "local": "2091-05-02T12:46:44+07:00", "utc": "2091-05-02T05:46:44Z", "ms": 3828923203958.2803 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-05-03", "window": { "start": { "local": "2091-05-03T11:58:38+07:00", "utc": "2091-05-03T04:58:38Z", "ms": 3829006717716.6914 }, "end": { "local": "2091-05-03T12:46:38+07:00", "utc": "2091-05-03T05:46:38Z", "ms": 3829009597716.6914 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 20:34 on Wed 2 May to 16:48 on Thu 3 May.", "fact": "2091-05-02T13:33:46Z → 2091-05-03T09:47:34Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 2nd, 11:59–12:47 on the 3rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 2nd and 48 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 14456 s" }, { "step": "ruling", "text": "Buddha Pūrṇimā, Medan, 2091: Thursday 3 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": "2091-05-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-03", "confidence": "determinate" } ], "quote": "In Medan, Buddha Pūrṇimā 2091 falls on Thursday 3 May. Pūrṇimā runs from 20:34 on Wed 2 May to 16:48 on Thu 3 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sampat-gauri-vrata", "festival": "sampat-gauri-vrata", "name": "Sampat Gaurī Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14456, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-05-02T20:33:46+07:00", "utc": "2091-05-02T13:33:46Z", "ms": 3828951226157.112 }, "end": { "local": "2091-05-03T16:47:34+07:00", "utc": "2091-05-03T09:47:34Z", "ms": 3829024053601.845 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-02T20:33:46+07:00", "utc": "2091-05-02T13:33:46Z", "ms": 3828951226157.112 }, "end": { "local": "2091-05-03T16:47:34+07:00", "utc": "2091-05-03T09:47:34Z", "ms": 3829024053601.845 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-05-02", "window": { "start": { "local": "2091-05-02T11:58:44+07:00", "utc": "2091-05-02T04:58:44Z", "ms": 3828920323958.2803 }, "end": { "local": "2091-05-02T12:46:44+07:00", "utc": "2091-05-02T05:46:44Z", "ms": 3828923203958.2803 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-05-03", "window": { "start": { "local": "2091-05-03T11:58:38+07:00", "utc": "2091-05-03T04:58:38Z", "ms": 3829006717716.6914 }, "end": { "local": "2091-05-03T12:46:38+07:00", "utc": "2091-05-03T05:46:38Z", "ms": 3829009597716.6914 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 20:34 on Wed 2 May to 16:48 on Thu 3 May.", "fact": "2091-05-02T13:33:46Z → 2091-05-03T09:47:34Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 2nd, 11:59–12:47 on the 3rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 2nd and 48 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 14456 s" }, { "step": "ruling", "text": "Sampat Gaurī Vrata, Medan, 2091: Thursday 3 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": "2091-05-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-03", "confidence": "determinate" } ], "quote": "In Medan, Sampat Gaurī Vrata 2091 falls on Thursday 3 May. Pūrṇimā runs from 20:34 on Wed 2 May to 16:48 on Thu 3 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-05-06", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25913, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-05-06T06:58:41+07:00", "utc": "2091-05-05T23:58:41Z", "ms": 3829247920896.1357 }, "end": { "local": "2091-05-07T04:47:19+07:00", "utc": "2091-05-06T21:47:19Z", "ms": 3829326439177.8213 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-06T06:58:41+07:00", "utc": "2091-05-05T23:58:41Z", "ms": 3829247920896.1357 }, "end": { "local": "2091-05-07T04:47:19+07:00", "utc": "2091-05-06T21:47:19Z", "ms": 3829326439177.8213 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-05-05", "window": { "start": { "local": "2091-05-05T20:36:48+07:00", "utc": "2091-05-05T13:36:48Z", "ms": 3829210608193.743 }, "end": { "local": "2091-05-05T20:36:48+07:00", "utc": "2091-05-05T13:36:48Z", "ms": 3829210608193.743 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-05-06", "window": { "start": { "local": "2091-05-06T21:35:26+07:00", "utc": "2091-05-06T14:35:26Z", "ms": 3829300526368.1787 }, "end": { "local": "2091-05-06T21:35:26+07:00", "utc": "2091-05-06T14:35:26Z", "ms": 3829300526368.1787 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 06:59 on Sun 6 May to 04:47 on Mon 7 May.", "fact": "2091-05-05T23:58:41Z → 2091-05-06T21:47:19Z" }, { "step": "kaala", "text": "Moonrise is at 20:37 on the 5th and 21:35 on the 6th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 5th and is on the 6th.", "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 25913 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Sunday 6 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": "2091-05-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-06", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Sunday 6 May. Caturthī runs from 06:59 on Sun 6 May to 04:47 on Mon 7 May and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-05-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-05-14", "festival": "ekadashi", "name": "Aparā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7809, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-05-13T08:24:10+07:00", "utc": "2091-05-13T01:24:10Z", "ms": 3829857849998.334 }, "end": { "local": "2091-05-14T10:57:14+07:00", "utc": "2091-05-14T03:57:14Z", "ms": 3829953433782.0166 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-13T08:24:10+07:00", "utc": "2091-05-13T01:24:10Z", "ms": 3829857849998.334 }, "end": { "local": "2091-05-14T10:57:14+07:00", "utc": "2091-05-14T03:57:14Z", "ms": 3829953433782.0166 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-05-13", "window": { "start": { "local": "2091-05-13T06:14:01+07:00", "utc": "2091-05-12T23:14:01Z", "ms": 3829850041410.793 }, "end": { "local": "2091-05-13T06:14:01+07:00", "utc": "2091-05-12T23:14:01Z", "ms": 3829850041410.793 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-05-14", "window": { "start": { "local": "2091-05-14T06:13:57+07:00", "utc": "2091-05-13T23:13:57Z", "ms": 3829936437035.542 }, "end": { "local": "2091-05-14T06:13:57+07:00", "utc": "2091-05-13T23:13:57Z", "ms": 3829936437035.542 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 08:24 on Sun 13 May to 10:57 on Mon 14 May.", "fact": "2091-05-13T01:24:10Z → 2091-05-14T03:57:14Z" }, { "step": "kaala", "text": "Sunrise is at 06:14 on the 13th and 06:14 on the 14th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 13th and is on the 14th.", "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 7809 s" }, { "step": "ruling", "text": "Aparā Ekādaśī, Medan, 2091: Monday 14 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": "2091-05-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-14", "confidence": "determinate" } ], "quote": "In Medan, Aparā Ekādaśī 2091 falls on Monday 14 May. Ekādaśī runs from 08:24 on Sun 13 May to 10:57 on Mon 14 May and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-05-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-05-15", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8941, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-05-15T13:33:09+07:00", "utc": "2091-05-15T06:33:09Z", "ms": 3830049188540.621 }, "end": { "local": "2091-05-16T16:01:27+07:00", "utc": "2091-05-16T09:01:27Z", "ms": 3830144486512.457 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-15T13:33:09+07:00", "utc": "2091-05-15T06:33:09Z", "ms": 3830049188540.621 }, "end": { "local": "2091-05-16T16:01:27+07:00", "utc": "2091-05-16T09:01:27Z", "ms": 3830144486512.457 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-05-15", "window": { "start": { "local": "2091-05-15T18:30:22+07:00", "utc": "2091-05-15T11:30:22Z", "ms": 3830067021668.1157 }, "end": { "local": "2091-05-15T20:04:09+07:00", "utc": "2091-05-15T13:04:09Z", "ms": 3830072649480.171 } }, "covered_min": 94, "window_min": 94, "qualifies": true }, { "local_date": "2091-05-16", "window": { "start": { "local": "2091-05-16T18:30:27+07:00", "utc": "2091-05-16T11:30:27Z", "ms": 3830153427257.7734 }, "end": { "local": "2091-05-16T20:04:14+07:00", "utc": "2091-05-16T13:04:14Z", "ms": 3830159054003.361 } }, "covered_min": 0, "window_min": 94, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:33 on Tue 15 May to 16:01 on Wed 16 May.", "fact": "2091-05-15T06:33:09Z → 2091-05-16T09:01:27Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:30–20:04 on the 15th, 18:30–20:04 on the 16th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 94 of 94 minutes on the 15th and 0 of 94 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8941 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Tuesday 15 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": "2091-05-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-15", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Tuesday 15 May. Trayodaśī runs from 13:33 on Tue 15 May to 16:01 on Wed 16 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-05-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-05-16", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20608, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-05-16T16:01:27+07:00", "utc": "2091-05-16T09:01:27Z", "ms": 3830144486512.457 }, "end": { "local": "2091-05-17T18:14:42+07:00", "utc": "2091-05-17T11:14:42Z", "ms": 3830238881984.5327 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-16T16:01:27+07:00", "utc": "2091-05-16T09:01:27Z", "ms": 3830144486512.457 }, "end": { "local": "2091-05-17T18:14:42+07:00", "utc": "2091-05-17T11:14:42Z", "ms": 3830238881984.5327 } }, "kaala": "nishita", "days": [ { "local_date": "2091-05-16", "window": { "start": { "local": "2091-05-16T23:58:08+07:00", "utc": "2091-05-16T16:58:08Z", "ms": 3830173087553.7256 }, "end": { "local": "2091-05-17T00:46:08+07:00", "utc": "2091-05-16T17:46:08Z", "ms": 3830175967553.7256 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-05-17", "window": { "start": { "local": "2091-05-17T23:58:10+07:00", "utc": "2091-05-17T16:58:10Z", "ms": 3830259489708.371 }, "end": { "local": "2091-05-18T00:46:10+07:00", "utc": "2091-05-17T17:46:10Z", "ms": 3830262369708.371 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 16:01 on Wed 16 May to 18:15 on Thu 17 May.", "fact": "2091-05-16T09:01:27Z → 2091-05-17T11:14:42Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:58–00:46 on the 16th, 23:58–00:46 on the 17th.", "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 16th and 0 of 48 on the 17th.", "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 20608 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Wednesday 16 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": "2091-05-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-16", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Wednesday 16 May. Caturdaśī runs from 16:01 on Wed 16 May to 18:15 on Thu 17 May and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-05-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/rambha-tritiya", "festival": "rambha-tritiya", "name": "Rambhā Tṛtīyā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36214, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-05-20T22:49:54+07:00", "utc": "2091-05-20T15:49:54Z", "ms": 3830514593648.423 }, "end": { "local": "2091-05-21T23:36:09+07:00", "utc": "2091-05-21T16:36:09Z", "ms": 3830603768694.372 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-20T22:49:54+07:00", "utc": "2091-05-20T15:49:54Z", "ms": 3830514593648.423 }, "end": { "local": "2091-05-21T23:36:09+07:00", "utc": "2091-05-21T16:36:09Z", "ms": 3830603768694.372 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-05-20", "window": { "start": { "local": "2091-05-20T11:58:19+07:00", "utc": "2091-05-20T04:58:19Z", "ms": 3830475499401.98 }, "end": { "local": "2091-05-20T12:46:19+07:00", "utc": "2091-05-20T05:46:19Z", "ms": 3830478379401.98 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-05-21", "window": { "start": { "local": "2091-05-21T11:58:23+07:00", "utc": "2091-05-21T04:58:23Z", "ms": 3830561903412.3745 }, "end": { "local": "2091-05-21T12:46:23+07:00", "utc": "2091-05-21T05:46:23Z", "ms": 3830564783412.3745 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 22:50 on Sun 20 May to 23:36 on Mon 21 May.", "fact": "2091-05-20T15:49:54Z → 2091-05-21T16:36:09Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 20th, 11:58–12:46 on the 21st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 20th and 48 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 36214 s" }, { "step": "ruling", "text": "Rambhā Tṛtīyā, Medan, 2091: Monday 21 May.", "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": "2091-05-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-21", "confidence": "determinate" } ], "quote": "In Medan, Rambhā Tṛtīyā 2091 falls on Monday 21 May. Tṛtīyā runs from 22:50 on Sun 20 May to 23:36 on Mon 21 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-05-22", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38985, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-05-21T23:36:09+07:00", "utc": "2091-05-21T16:36:09Z", "ms": 3830603768694.372 }, "end": { "local": "2091-05-22T23:58:24+07:00", "utc": "2091-05-22T16:58:24Z", "ms": 3830691504027.741 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-21T23:36:09+07:00", "utc": "2091-05-21T16:36:09Z", "ms": 3830603768694.372 }, "end": { "local": "2091-05-22T23:58:24+07:00", "utc": "2091-05-22T16:58:24Z", "ms": 3830691504027.741 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-05-21", "window": { "start": { "local": "2091-05-21T11:58:23+07:00", "utc": "2091-05-21T04:58:23Z", "ms": 3830561903412.3745 }, "end": { "local": "2091-05-21T12:46:23+07:00", "utc": "2091-05-21T05:46:23Z", "ms": 3830564783412.3745 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-05-22", "window": { "start": { "local": "2091-05-22T11:58:28+07:00", "utc": "2091-05-22T04:58:28Z", "ms": 3830648307940.4604 }, "end": { "local": "2091-05-22T12:46:28+07:00", "utc": "2091-05-22T05:46:28Z", "ms": 3830651187940.4604 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:36 on Mon 21 May to 23:58 on Tue 22 May.", "fact": "2091-05-21T16:36:09Z → 2091-05-22T16:58:24Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 21st, 11:58–12:46 on the 22nd.", "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 21st and 48 of 48 on the 22nd.", "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 38985 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Tuesday 22 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": "2091-05-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-22", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Tuesday 22 May. Caturthī runs from 23:36 on Mon 21 May to 23:58 on Tue 22 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-05-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/aranya-gauri-vrata", "festival": "aranya-gauri-vrata", "name": "Araṇya Gaurī Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38290, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-05-23T23:55:15+07:00", "utc": "2091-05-23T16:55:15Z", "ms": 3830777714679.164 }, "end": { "local": "2091-05-24T23:24:49+07:00", "utc": "2091-05-24T16:24:49Z", "ms": 3830862288535.0586 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-23T23:55:15+07:00", "utc": "2091-05-23T16:55:15Z", "ms": 3830777714679.164 }, "end": { "local": "2091-05-24T23:24:49+07:00", "utc": "2091-05-24T16:24:49Z", "ms": 3830862288535.0586 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-05-23", "window": { "start": { "local": "2091-05-23T11:58:33+07:00", "utc": "2091-05-23T04:58:33Z", "ms": 3830734712973.9404 }, "end": { "local": "2091-05-23T12:46:33+07:00", "utc": "2091-05-23T05:46:33Z", "ms": 3830737592973.9404 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-05-24", "window": { "start": { "local": "2091-05-24T11:58:39+07:00", "utc": "2091-05-24T04:58:39Z", "ms": 3830821118500.077 }, "end": { "local": "2091-05-24T12:46:39+07:00", "utc": "2091-05-24T05:46:39Z", "ms": 3830823998500.077 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 23:55 on Wed 23 May to 23:25 on Thu 24 May.", "fact": "2091-05-23T16:55:15Z → 2091-05-24T16:24:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 23rd, 11:59–12:47 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 23rd and 48 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: paraviddha → only-day · margin 38290 s" }, { "step": "ruling", "text": "Araṇya Gaurī Vrata, Medan, 2091: Thursday 24 May.", "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": "2091-05-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-24", "confidence": "determinate" } ], "quote": "In Medan, Araṇya Gaurī Vrata 2091 falls on Thursday 24 May. Ṣaṣṭhī runs from 23:55 on Wed 23 May to 23:25 on Thu 24 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/skanda-shashthi-jyaishtha", "festival": "skanda-shashthi-jyaishtha", "name": "Skanda Ṣaṣṭhī (Jyaiṣṭha)", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38290, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-05-23T23:55:15+07:00", "utc": "2091-05-23T16:55:15Z", "ms": 3830777714679.164 }, "end": { "local": "2091-05-24T23:24:49+07:00", "utc": "2091-05-24T16:24:49Z", "ms": 3830862288535.0586 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-23T23:55:15+07:00", "utc": "2091-05-23T16:55:15Z", "ms": 3830777714679.164 }, "end": { "local": "2091-05-24T23:24:49+07:00", "utc": "2091-05-24T16:24:49Z", "ms": 3830862288535.0586 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-05-23", "window": { "start": { "local": "2091-05-23T11:58:33+07:00", "utc": "2091-05-23T04:58:33Z", "ms": 3830734712973.9404 }, "end": { "local": "2091-05-23T12:46:33+07:00", "utc": "2091-05-23T05:46:33Z", "ms": 3830737592973.9404 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-05-24", "window": { "start": { "local": "2091-05-24T11:58:39+07:00", "utc": "2091-05-24T04:58:39Z", "ms": 3830821118500.077 }, "end": { "local": "2091-05-24T12:46:39+07:00", "utc": "2091-05-24T05:46:39Z", "ms": 3830823998500.077 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 23:55 on Wed 23 May to 23:25 on Thu 24 May.", "fact": "2091-05-23T16:55:15Z → 2091-05-24T16:24:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 23rd, 11:59–12:47 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 23rd and 48 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 38290 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī (Jyaiṣṭha), Medan, 2091: Thursday 24 May.", "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": "2091-05-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-24", "confidence": "determinate" } ], "quote": "In Medan, Skanda Ṣaṣṭhī (Jyaiṣṭha) 2091 falls on Thursday 24 May. Ṣaṣṭhī runs from 23:55 on Wed 23 May to 23:25 on Thu 24 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-05-29", "festival": "ekadashi", "name": "Nirjalā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26497, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-05-28T16:27:36+07:00", "utc": "2091-05-28T09:27:36Z", "ms": 3831182856148.536 }, "end": { "local": "2091-05-29T13:35:44+07:00", "utc": "2091-05-29T06:35:44Z", "ms": 3831258943517.4673 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-28T16:27:36+07:00", "utc": "2091-05-28T09:27:36Z", "ms": 3831182856148.536 }, "end": { "local": "2091-05-29T13:35:44+07:00", "utc": "2091-05-29T06:35:44Z", "ms": 3831258943517.4673 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-05-28", "window": { "start": { "local": "2091-05-28T06:14:02+07:00", "utc": "2091-05-27T23:14:02Z", "ms": 3831146042184.2017 }, "end": { "local": "2091-05-28T06:14:02+07:00", "utc": "2091-05-27T23:14:02Z", "ms": 3831146042184.2017 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-05-29", "window": { "start": { "local": "2091-05-29T06:14:07+07:00", "utc": "2091-05-28T23:14:07Z", "ms": 3831232446944.5776 }, "end": { "local": "2091-05-29T06:14:07+07:00", "utc": "2091-05-28T23:14:07Z", "ms": 3831232446944.5776 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:28 on Mon 28 May to 13:36 on Tue 29 May.", "fact": "2091-05-28T09:27:36Z → 2091-05-29T06:35:44Z" }, { "step": "kaala", "text": "Sunrise is at 06:14 on the 28th and 06:14 on the 29th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 28th and is on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 26497 s" }, { "step": "ruling", "text": "Nirjalā Ekādaśī, Medan, 2091: Tuesday 29 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": "2091-05-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-29", "confidence": "determinate" } ], "quote": "In Medan, Nirjalā Ekādaśī 2091 falls on Tuesday 29 May. Ekādaśī runs from 16:28 on Mon 28 May to 13:36 on Tue 29 May and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-05-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shri-rama-dvadashi", "festival": "shri-rama-dvadashi", "name": "Śrī Rāma Dvādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2910, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-05-29T13:35:44+07:00", "utc": "2091-05-29T06:35:44Z", "ms": 3831258943517.4673 }, "end": { "local": "2091-05-30T10:25:56+07:00", "utc": "2091-05-30T03:25:56Z", "ms": 3831333955978.9805 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-29T13:35:44+07:00", "utc": "2091-05-29T06:35:44Z", "ms": 3831258943517.4673 }, "end": { "local": "2091-05-30T10:25:56+07:00", "utc": "2091-05-30T03:25:56Z", "ms": 3831333955978.9805 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-05-29", "window": { "start": { "local": "2091-05-29T11:59:13+07:00", "utc": "2091-05-29T04:59:13Z", "ms": 3831253153070.6294 }, "end": { "local": "2091-05-29T12:47:13+07:00", "utc": "2091-05-29T05:47:13Z", "ms": 3831256033070.6294 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-05-30", "window": { "start": { "local": "2091-05-30T11:59:21+07:00", "utc": "2091-05-30T04:59:21Z", "ms": 3831339561286.951 }, "end": { "local": "2091-05-30T12:47:21+07:00", "utc": "2091-05-30T05:47:21Z", "ms": 3831342441286.951 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 13:36 on Tue 29 May to 10:26 on Wed 30 May.", "fact": "2091-05-29T06:35:44Z → 2091-05-30T03:25:56Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 29th, 11:59–12:47 on the 30th.", "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 29th and 0 of 48 on the 30th.", "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 2910 s" }, { "step": "ruling", "text": "Śrī Rāma Dvādaśī, Medan, 2091: Wednesday 30 May.", "fact": "confidence: determinate" } ], "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": "2091-05-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-29", "confidence": "boundary" } ], "quote": "In Medan, Śrī Rāma Dvādaśī 2091 falls on Wednesday 30 May. Dvādaśī runs from 13:36 on Tue 29 May to 10:26 on Wed 30 May, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pradosha-vrata?on=2091-05-30", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-05-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29194, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-05-30T10:25:56+07:00", "utc": "2091-05-30T03:25:56Z", "ms": 3831333955978.9805 }, "end": { "local": "2091-05-31T07:05:58+07:00", "utc": "2091-05-31T00:05:58Z", "ms": 3831408358474.8384 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-05-30T10:25:56+07:00", "utc": "2091-05-30T03:25:56Z", "ms": 3831333955978.9805 }, "end": { "local": "2091-05-31T07:05:58+07:00", "utc": "2091-05-31T00:05:58Z", "ms": 3831408358474.8384 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-05-30", "window": { "start": { "local": "2091-05-30T18:32:30+07:00", "utc": "2091-05-30T11:32:30Z", "ms": 3831363150336.835 }, "end": { "local": "2091-05-30T20:06:05+07:00", "utc": "2091-05-30T13:06:05Z", "ms": 3831368764698.9307 } }, "covered_min": 94, "window_min": 94, "qualifies": true }, { "local_date": "2091-05-31", "window": { "start": { "local": "2091-05-31T18:32:42+07:00", "utc": "2091-05-31T11:32:42Z", "ms": 3831449561769.4575 }, "end": { "local": "2091-05-31T20:06:15+07:00", "utc": "2091-05-31T13:06:15Z", "ms": 3831455175451.137 } }, "covered_min": 0, "window_min": 94, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 10:26 on Wed 30 May to 07:06 on Thu 31 May.", "fact": "2091-05-30T03:25:56Z → 2091-05-31T00:05:58Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:33–20:06 on the 30th, 18:33–20:06 on the 31st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 94 of 94 minutes on the 30th and 0 of 94 on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 29194 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Wednesday 30 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": "2091-05-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-05-30", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Wednesday 30 May. Trayodaśī runs from 10:26 on Wed 30 May to 07:06 on Thu 31 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-05-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/vata-savitri-vrata", "festival": "vata-savitri-vrata", "name": "Vaṭa Sāvitrī Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15980, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-06-01T03:44:56+07:00", "utc": "2091-05-31T20:44:56Z", "ms": 3831482695841.4517 }, "end": { "local": "2091-06-02T00:32:46+07:00", "utc": "2091-06-01T17:32:46Z", "ms": 3831557566143.888 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-01T03:44:56+07:00", "utc": "2091-05-31T20:44:56Z", "ms": 3831482695841.4517 }, "end": { "local": "2091-06-02T00:32:46+07:00", "utc": "2091-06-01T17:32:46Z", "ms": 3831557566143.888 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-05-31", "window": { "start": { "local": "2091-05-31T18:32:42+07:00", "utc": "2091-05-31T11:32:42Z", "ms": 3831449561769.4575 }, "end": { "local": "2091-05-31T20:06:15+07:00", "utc": "2091-05-31T13:06:15Z", "ms": 3831455175451.137 } }, "covered_min": 0, "window_min": 94, "qualifies": false }, { "local_date": "2091-06-01", "window": { "start": { "local": "2091-06-01T18:32:53+07:00", "utc": "2091-06-01T11:32:53Z", "ms": 3831535973482.1206 }, "end": { "local": "2091-06-01T20:06:27+07:00", "utc": "2091-06-01T13:06:27Z", "ms": 3831541586513.35 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 03:45 on Fri 1 Jun to 00:33 on Sat 2 Jun.", "fact": "2091-05-31T20:44:56Z → 2091-06-01T17:32:46Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:33–20:06 on the 31st, 18:33–20:06 on the 1st.", "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 94 minutes on the 31st and 94 of 94 on the 1st.", "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 15980 s" }, { "step": "ruling", "text": "Vaṭa Sāvitrī Vrata, Medan, 2091: Friday 1 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": "2091-06-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-01", "confidence": "determinate" } ], "quote": "In Medan, Vaṭa Sāvitrī Vrata 2091 falls on Friday 1 June. Pūrṇimā runs from 03:45 on Fri 1 Jun to 00:33 on Sat 2 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-06-04", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13293, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-06-04T17:31:08+07:00", "utc": "2091-06-04T10:31:08Z", "ms": 3831791468076.5776 }, "end": { "local": "2091-06-05T16:31:40+07:00", "utc": "2091-06-05T09:31:40Z", "ms": 3831874299945.1396 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-04T17:31:08+07:00", "utc": "2091-06-04T10:31:08Z", "ms": 3831791468076.5776 }, "end": { "local": "2091-06-05T16:31:40+07:00", "utc": "2091-06-05T09:31:40Z", "ms": 3831874299945.1396 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-06-04", "window": { "start": { "local": "2091-06-04T21:12:41+07:00", "utc": "2091-06-04T14:12:41Z", "ms": 3831804760952.537 }, "end": { "local": "2091-06-04T21:12:41+07:00", "utc": "2091-06-04T14:12:41Z", "ms": 3831804760952.537 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-06-05", "window": { "start": { "local": "2091-06-05T22:05:41+07:00", "utc": "2091-06-05T15:05:41Z", "ms": 3831894340841.829 }, "end": { "local": "2091-06-05T22:05:41+07:00", "utc": "2091-06-05T15:05:41Z", "ms": 3831894340841.829 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:31 on Mon 4 Jun to 16:32 on Tue 5 Jun.", "fact": "2091-06-04T10:31:08Z → 2091-06-05T09:31:40Z" }, { "step": "kaala", "text": "Moonrise is at 21:13 on the 4th and 22:06 on the 5th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 4th and is not on the 5th.", "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 13293 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Monday 4 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": "2091-06-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-04", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Monday 4 June. Caturthī runs from 17:31 on Mon 4 Jun to 16:32 on Tue 5 Jun and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-06-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-06-12", "festival": "ekadashi", "name": "Yoginī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9001, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-06-12T01:21:23+07:00", "utc": "2091-06-11T18:21:23Z", "ms": 3832424483034.781 }, "end": { "local": "2091-06-13T03:46:15+07:00", "utc": "2091-06-12T20:46:15Z", "ms": 3832519574911.709 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-12T01:21:23+07:00", "utc": "2091-06-11T18:21:23Z", "ms": 3832424483034.781 }, "end": { "local": "2091-06-13T03:46:15+07:00", "utc": "2091-06-12T20:46:15Z", "ms": 3832519574911.709 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-06-12", "window": { "start": { "local": "2091-06-12T06:16:04+07:00", "utc": "2091-06-11T23:16:04Z", "ms": 3832442164490.4814 }, "end": { "local": "2091-06-12T06:16:04+07:00", "utc": "2091-06-11T23:16:04Z", "ms": 3832442164490.4814 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-06-13", "window": { "start": { "local": "2091-06-13T06:16:16+07:00", "utc": "2091-06-12T23:16:16Z", "ms": 3832528575929.835 }, "end": { "local": "2091-06-13T06:16:16+07:00", "utc": "2091-06-12T23:16:16Z", "ms": 3832528575929.835 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 01:21 on Tue 12 Jun to 03:46 on Wed 13 Jun.", "fact": "2091-06-11T18:21:23Z → 2091-06-12T20:46:15Z" }, { "step": "kaala", "text": "Sunrise is at 06:16 on the 12th and 06:16 on the 13th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 12th and is not on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 9001 s" }, { "step": "ruling", "text": "Yoginī Ekādaśī, Medan, 2091: Tuesday 12 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": "2091-06-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-12", "confidence": "determinate" } ], "quote": "In Medan, Yoginī Ekādaśī 2091 falls on Tuesday 12 June. Ekādaśī runs from 01:21 on Tue 12 Jun to 03:46 on Wed 13 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-06-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-06-14", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35118, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-06-14T05:54:15+07:00", "utc": "2091-06-13T22:54:15Z", "ms": 3832613655341.997 }, "end": { "local": "2091-06-15T07:38:11+07:00", "utc": "2091-06-15T00:38:11Z", "ms": 3832706290791.0166 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-14T05:54:15+07:00", "utc": "2091-06-13T22:54:15Z", "ms": 3832613655341.997 }, "end": { "local": "2091-06-15T07:38:11+07:00", "utc": "2091-06-15T00:38:11Z", "ms": 3832706290791.0166 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-06-13", "window": { "start": { "local": "2091-06-13T18:35:30+07:00", "utc": "2091-06-13T11:35:30Z", "ms": 3832572930068.1274 }, "end": { "local": "2091-06-13T20:08:58+07:00", "utc": "2091-06-13T13:08:58Z", "ms": 3832578537748.114 } }, "covered_min": 0, "window_min": 93, "qualifies": false }, { "local_date": "2091-06-14", "window": { "start": { "local": "2091-06-14T18:35:44+07:00", "utc": "2091-06-14T11:35:44Z", "ms": 3832659343833.858 }, "end": { "local": "2091-06-14T20:09:11+07:00", "utc": "2091-06-14T13:09:11Z", "ms": 3832664951280.0723 } }, "covered_min": 93, "window_min": 93, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 05:54 on Thu 14 Jun to 07:38 on Fri 15 Jun.", "fact": "2091-06-13T22:54:15Z → 2091-06-15T00:38:11Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:36–20:09 on the 13th, 18:36–20:09 on the 14th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 93 minutes on the 13th and 93 of 93 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 35118 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Thursday 14 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": "2091-06-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-14", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Thursday 14 June. Trayodaśī runs from 05:54 on Thu 14 Jun to 07:38 on Fri 15 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-06-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-06-15", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24479, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-06-15T07:38:11+07:00", "utc": "2091-06-15T00:38:11Z", "ms": 3832706290791.0166 }, "end": { "local": "2091-06-16T08:54:30+07:00", "utc": "2091-06-16T01:54:30Z", "ms": 3832797269554.5396 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-15T07:38:11+07:00", "utc": "2091-06-15T00:38:11Z", "ms": 3832706290791.0166 }, "end": { "local": "2091-06-16T08:54:30+07:00", "utc": "2091-06-16T01:54:30Z", "ms": 3832797269554.5396 } }, "kaala": "nishita", "days": [ { "local_date": "2091-06-14", "window": { "start": { "local": "2091-06-15T00:02:12+07:00", "utc": "2091-06-14T17:02:12Z", "ms": 3832678931757.1616 }, "end": { "local": "2091-06-15T00:50:12+07:00", "utc": "2091-06-14T17:50:12Z", "ms": 3832681811757.1616 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-06-15", "window": { "start": { "local": "2091-06-16T00:02:25+07:00", "utc": "2091-06-15T17:02:25Z", "ms": 3832765344769.4526 }, "end": { "local": "2091-06-16T00:50:25+07:00", "utc": "2091-06-15T17:50:25Z", "ms": 3832768224769.4526 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 07:38 on Fri 15 Jun to 08:54 on Sat 16 Jun.", "fact": "2091-06-15T00:38:11Z → 2091-06-16T01:54:30Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:02–00:50 on the 14th, 00:02–00:50 on the 15th.", "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 14th and 48 of 48 on the 15th.", "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 24479 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Friday 15 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": "2091-06-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-15", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Friday 15 June. Caturdaśī runs from 07:38 on Fri 15 Jun to 08:54 on Sat 16 Jun and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-06-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-06-20", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8921, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-06-20T09:34:43+07:00", "utc": "2091-06-20T02:34:43Z", "ms": 3833145282751.39 }, "end": { "local": "2091-06-21T08:48:10+07:00", "utc": "2091-06-21T01:48:10Z", "ms": 3833228889771.5234 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": true, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-20T09:34:43+07:00", "utc": "2091-06-20T02:34:43Z", "ms": 3833145282751.39 }, "end": { "local": "2091-06-21T08:48:10+07:00", "utc": "2091-06-21T01:48:10Z", "ms": 3833228889771.5234 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-06-20", "window": { "start": { "local": "2091-06-20T12:03:24+07:00", "utc": "2091-06-20T05:03:24Z", "ms": 3833154204177.0503 }, "end": { "local": "2091-06-20T12:51:24+07:00", "utc": "2091-06-20T05:51:24Z", "ms": 3833157084177.0503 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-06-21", "window": { "start": { "local": "2091-06-21T12:03:37+07:00", "utc": "2091-06-21T05:03:37Z", "ms": 3833240617310.3438 }, "end": { "local": "2091-06-21T12:51:37+07:00", "utc": "2091-06-21T05:51:37Z", "ms": 3833243497310.3438 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 09:35 on Wed 20 Jun to 08:48 on Thu 21 Jun.", "fact": "2091-06-20T02:34:43Z → 2091-06-21T01:48:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 20th, 12:04–12:52 on the 21st.", "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 20th and 0 of 48 on the 21st.", "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 8921 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Wednesday 20 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": "2091-06-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-20", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Wednesday 20 June. Caturthī runs from 09:35 on Wed 20 Jun to 08:48 on Thu 21 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-06-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-06-27", "festival": "ekadashi", "name": "Śukla Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31253, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-06-26T21:38:23+07:00", "utc": "2091-06-26T14:38:23Z", "ms": 3833707102956.24 }, "end": { "local": "2091-06-27T18:56:59+07:00", "utc": "2091-06-27T11:56:59Z", "ms": 3833783819148.6216 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": true, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-26T21:38:23+07:00", "utc": "2091-06-26T14:38:23Z", "ms": 3833707102956.24 }, "end": { "local": "2091-06-27T18:56:59+07:00", "utc": "2091-06-27T11:56:59Z", "ms": 3833783819148.6216 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-06-27", "window": { "start": { "local": "2091-06-27T06:19:16+07:00", "utc": "2091-06-26T23:19:16Z", "ms": 3833738355502.5537 }, "end": { "local": "2091-06-27T06:19:16+07:00", "utc": "2091-06-26T23:19:16Z", "ms": 3833738355502.5537 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-06-28", "window": { "start": { "local": "2091-06-28T06:19:29+07:00", "utc": "2091-06-27T23:19:29Z", "ms": 3833824768665.4136 }, "end": { "local": "2091-06-28T06:19:29+07:00", "utc": "2091-06-27T23:19:29Z", "ms": 3833824768665.4136 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:38 on Tue 26 Jun to 18:57 on Wed 27 Jun.", "fact": "2091-06-26T14:38:23Z → 2091-06-27T11:56:59Z" }, { "step": "kaala", "text": "Sunrise is at 06:19 on the 27th and 06:19 on the 28th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 27th and is not on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 31253 s" }, { "step": "ruling", "text": "Śukla Ekādaśī, Medan, 2091: Wednesday 27 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": "2091-06-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-27", "confidence": "determinate" } ], "quote": "In Medan, Śukla Ekādaśī 2091 falls on Wednesday 27 June. Ekādaśī runs from 21:38 on Tue 26 Jun to 18:57 on Wed 27 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-06-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-06-28", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-06-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8776, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-06-28T16:12:27+07:00", "utc": "2091-06-28T09:12:27Z", "ms": 3833860347480.4077 }, "end": { "local": "2091-06-29T13:31:56+07:00", "utc": "2091-06-29T06:31:56Z", "ms": 3833937116239.8965 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": true, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-06-28T16:12:27+07:00", "utc": "2091-06-28T09:12:27Z", "ms": 3833860347480.4077 }, "end": { "local": "2091-06-29T13:31:56+07:00", "utc": "2091-06-29T06:31:56Z", "ms": 3833937116239.8965 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-06-28", "window": { "start": { "local": "2091-06-28T18:38:44+07:00", "utc": "2091-06-28T11:38:44Z", "ms": 3833869123861.7246 }, "end": { "local": "2091-06-28T20:12:12+07:00", "utc": "2091-06-28T13:12:12Z", "ms": 3833874731579.9023 } }, "covered_min": 93, "window_min": 93, "qualifies": true }, { "local_date": "2091-06-29", "window": { "start": { "local": "2091-06-29T18:38:55+07:00", "utc": "2091-06-29T11:38:55Z", "ms": 3833955534795.542 }, "end": { "local": "2091-06-29T20:12:23+07:00", "utc": "2091-06-29T13:12:23Z", "ms": 3833961142787.0303 } }, "covered_min": 0, "window_min": 93, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 16:12 on Thu 28 Jun to 13:32 on Fri 29 Jun.", "fact": "2091-06-28T09:12:27Z → 2091-06-29T06:31:56Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:39–20:12 on the 28th, 18:39–20:12 on the 29th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 93 of 93 minutes on the 28th and 0 of 93 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8776 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Thursday 28 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": "2091-06-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-06-28", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Thursday 28 June. Trayodaśī runs from 16:12 on Thu 28 Jun to 13:32 on Fri 29 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-06-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/sankashta-chaturthi?on=2091-07-04", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31215, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-07-04T05:51:25+07:00", "utc": "2091-07-03T22:51:25Z", "ms": 3834341485388.105 }, "end": { "local": "2091-07-05T06:13:58+07:00", "utc": "2091-07-04T23:13:58Z", "ms": 3834429238201.216 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": true, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-04T05:51:25+07:00", "utc": "2091-07-03T22:51:25Z", "ms": 3834341485388.105 }, "end": { "local": "2091-07-05T06:13:58+07:00", "utc": "2091-07-04T23:13:58Z", "ms": 3834429238201.216 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-07-03", "window": { "start": { "local": "2091-07-03T20:45:04+07:00", "utc": "2091-07-03T13:45:04Z", "ms": 3834308704172.2183 }, "end": { "local": "2091-07-03T20:45:04+07:00", "utc": "2091-07-03T13:45:04Z", "ms": 3834308704172.2183 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-07-04", "window": { "start": { "local": "2091-07-04T21:33:43+07:00", "utc": "2091-07-04T14:33:43Z", "ms": 3834398023304.592 }, "end": { "local": "2091-07-04T21:33:43+07:00", "utc": "2091-07-04T14:33:43Z", "ms": 3834398023304.592 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:51 on Wed 4 Jul to 06:14 on Thu 5 Jul.", "fact": "2091-07-03T22:51:25Z → 2091-07-04T23:13:58Z" }, { "step": "kaala", "text": "Moonrise is at 20:45 on the 3rd and 21:34 on the 4th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 3rd and is on the 4th.", "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 31215 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Wednesday 4 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": "2091-07-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-04", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Wednesday 4 July. Caturthī runs from 05:51 on Wed 4 Jul to 06:14 on Thu 5 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-07-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-07-12", "festival": "ekadashi", "name": "Kṛṣṇa Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37797, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-07-11T18:08:22+07:00", "utc": "2091-07-11T11:08:22Z", "ms": 3834990501744.806 }, "end": { "local": "2091-07-12T19:52:29+07:00", "utc": "2091-07-12T12:52:29Z", "ms": 3835083149357.555 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": true, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-11T18:08:22+07:00", "utc": "2091-07-11T11:08:22Z", "ms": 3834990501744.806 }, "end": { "local": "2091-07-12T19:52:29+07:00", "utc": "2091-07-12T12:52:29Z", "ms": 3835083149357.555 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-07-12", "window": { "start": { "local": "2091-07-12T06:22:16+07:00", "utc": "2091-07-11T23:22:16Z", "ms": 3835034536268.3784 }, "end": { "local": "2091-07-12T06:22:16+07:00", "utc": "2091-07-11T23:22:16Z", "ms": 3835034536268.3784 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-07-13", "window": { "start": { "local": "2091-07-13T06:22:26+07:00", "utc": "2091-07-12T23:22:26Z", "ms": 3835120946314.8433 }, "end": { "local": "2091-07-13T06:22:26+07:00", "utc": "2091-07-12T23:22:26Z", "ms": 3835120946314.8433 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:08 on Wed 11 Jul to 19:52 on Thu 12 Jul.", "fact": "2091-07-11T11:08:22Z → 2091-07-12T12:52:29Z" }, { "step": "kaala", "text": "Sunrise is at 06:22 on the 12th and 06:22 on the 13th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 12th and is not on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 37797 s" }, { "step": "ruling", "text": "Kṛṣṇa Ekādaśī, Medan, 2091: Thursday 12 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": "2091-07-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-12", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Ekādaśī 2091 falls on Thursday 12 July. Ekādaśī runs from 18:08 on Wed 11 Jul to 19:52 on Thu 12 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-07-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-07-14", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3030, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-07-13T21:04:47+07:00", "utc": "2091-07-13T14:04:47Z", "ms": 3835173886987.7397 }, "end": { "local": "2091-07-14T21:42:20+07:00", "utc": "2091-07-14T14:42:20Z", "ms": 3835262540175.7124 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": true, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-13T21:04:47+07:00", "utc": "2091-07-13T14:04:47Z", "ms": 3835173886987.7397 }, "end": { "local": "2091-07-14T21:42:20+07:00", "utc": "2091-07-14T14:42:20Z", "ms": 3835262540175.7124 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-07-13", "window": { "start": { "local": "2091-07-13T18:40:42+07:00", "utc": "2091-07-13T11:40:42Z", "ms": 3835165242157.963 }, "end": { "local": "2091-07-13T20:14:17+07:00", "utc": "2091-07-13T13:14:17Z", "ms": 3835170857337.548 } }, "covered_min": 0, "window_min": 94, "qualifies": false }, { "local_date": "2091-07-14", "window": { "start": { "local": "2091-07-14T18:40:46+07:00", "utc": "2091-07-14T11:40:46Z", "ms": 3835251645939.689 }, "end": { "local": "2091-07-14T20:14:22+07:00", "utc": "2091-07-14T13:14:22Z", "ms": 3835257261857.018 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 21:05 on Fri 13 Jul to 21:42 on Sat 14 Jul.", "fact": "2091-07-13T14:04:47Z → 2091-07-14T14:42:20Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:41–20:14 on the 13th, 18:41–20:14 on the 14th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 94 minutes on the 13th and 94 of 94 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 3030 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Saturday 14 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": "2091-07-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-14", "confidence": "boundary" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Saturday 14 July. Trayodaśī runs from 21:05 on Fri 13 Jul to 21:42 on Sat 14 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-07-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-07-14", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8538, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-07-14T21:42:20+07:00", "utc": "2091-07-14T14:42:20Z", "ms": 3835262540175.7124 }, "end": { "local": "2091-07-15T21:45:34+07:00", "utc": "2091-07-15T14:45:34Z", "ms": 3835349134012.6997 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": true, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-14T21:42:20+07:00", "utc": "2091-07-14T14:42:20Z", "ms": 3835262540175.7124 }, "end": { "local": "2091-07-15T21:45:34+07:00", "utc": "2091-07-15T14:45:34Z", "ms": 3835349134012.6997 } }, "kaala": "nishita", "days": [ { "local_date": "2091-07-14", "window": { "start": { "local": "2091-07-15T00:07:46+07:00", "utc": "2091-07-14T17:07:46Z", "ms": 3835271265629.673 }, "end": { "local": "2091-07-15T00:55:46+07:00", "utc": "2091-07-14T17:55:46Z", "ms": 3835274145629.673 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-07-15", "window": { "start": { "local": "2091-07-16T00:07:52+07:00", "utc": "2091-07-15T17:07:52Z", "ms": 3835357671681.3203 }, "end": { "local": "2091-07-16T00:55:52+07:00", "utc": "2091-07-15T17:55:52Z", "ms": 3835360551681.3203 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 21:42 on Sat 14 Jul to 21:46 on Sun 15 Jul.", "fact": "2091-07-14T14:42:20Z → 2091-07-15T14:45:34Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:08–00:56 on the 14th, 00:08–00:56 on the 15th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8538 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Saturday 14 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-07-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-14", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Saturday 14 July. Caturdaśī runs from 21:42 on Sat 14 Jul to 21:46 on Sun 15 Jul and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-07-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/rathayatra", "festival": "rathayatra", "name": "Rathayātrā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22019, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "2091-07-17T20:21:31+07:00", "utc": "2091-07-17T13:21:31Z", "ms": 3835516891029.8413 }, "end": { "local": "2091-07-18T19:03:01+07:00", "utc": "2091-07-18T12:03:01Z", "ms": 3835598581454.6357 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-17T20:21:31+07:00", "utc": "2091-07-17T13:21:31Z", "ms": 3835516891029.8413 }, "end": { "local": "2091-07-18T19:03:01+07:00", "utc": "2091-07-18T12:03:01Z", "ms": 3835598581454.6357 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-07-17", "window": { "start": { "local": "2091-07-17T12:07:58+07:00", "utc": "2091-07-17T05:07:58Z", "ms": 3835487278189.8315 }, "end": { "local": "2091-07-17T12:55:58+07:00", "utc": "2091-07-17T05:55:58Z", "ms": 3835490158189.8315 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-07-18", "window": { "start": { "local": "2091-07-18T12:08:03+07:00", "utc": "2091-07-18T05:08:03Z", "ms": 3835573682877.5664 }, "end": { "local": "2091-07-18T12:56:03+07:00", "utc": "2091-07-18T05:56:03Z", "ms": 3835576562877.5664 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 20:22 on Tue 17 Jul to 19:03 on Wed 18 Jul.", "fact": "2091-07-17T13:21:31Z → 2091-07-18T12:03:01Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 17th, 12:08–12:56 on the 18th.", "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 17th and 48 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: paraviddha → only-day · margin 22019 s" }, { "step": "ruling", "text": "Rathayātrā, Medan, 2091: Wednesday 18 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": "2091-07-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-18", "confidence": "determinate" } ], "quote": "In Medan, Rathayātrā 2091 falls on Wednesday 18 July. Dvitīyā runs from 20:22 on Tue 17 Jul to 19:03 on Wed 18 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-07-20", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9563, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-07-19T17:26:20+07:00", "utc": "2091-07-19T10:26:20Z", "ms": 3835679180088.5303 }, "end": { "local": "2091-07-20T15:35:34+07:00", "utc": "2091-07-20T08:35:34Z", "ms": 3835758933588.0996 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-19T17:26:20+07:00", "utc": "2091-07-19T10:26:20Z", "ms": 3835679180088.5303 }, "end": { "local": "2091-07-20T15:35:34+07:00", "utc": "2091-07-20T08:35:34Z", "ms": 3835758933588.0996 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-07-19", "window": { "start": { "local": "2091-07-19T12:08:07+07:00", "utc": "2091-07-19T05:08:07Z", "ms": 3835660087013.3965 }, "end": { "local": "2091-07-19T12:56:07+07:00", "utc": "2091-07-19T05:56:07Z", "ms": 3835662967013.3965 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-07-20", "window": { "start": { "local": "2091-07-20T12:08:11+07:00", "utc": "2091-07-20T05:08:11Z", "ms": 3835746490582.9717 }, "end": { "local": "2091-07-20T12:56:11+07:00", "utc": "2091-07-20T05:56:11Z", "ms": 3835749370582.9717 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:26 on Thu 19 Jul to 15:36 on Fri 20 Jul.", "fact": "2091-07-19T10:26:20Z → 2091-07-20T08:35:34Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 19th, 12:08–12:56 on the 20th.", "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 19th and 48 of 48 on the 20th.", "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 9563 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Friday 20 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": "2091-07-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-20", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Friday 20 July. Caturthī runs from 17:26 on Thu 19 Jul to 15:36 on Fri 20 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-07-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/skanda-panchami", "festival": "skanda-panchami", "name": "Skanda Pañcamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2280, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-07-20T15:35:34+07:00", "utc": "2091-07-20T08:35:34Z", "ms": 3835758933588.0996 }, "end": { "local": "2091-07-21T13:34:13+07:00", "utc": "2091-07-21T06:34:13Z", "ms": 3835838053121.5576 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-20T15:35:34+07:00", "utc": "2091-07-20T08:35:34Z", "ms": 3835758933588.0996 }, "end": { "local": "2091-07-21T13:34:13+07:00", "utc": "2091-07-21T06:34:13Z", "ms": 3835838053121.5576 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-07-20", "window": { "start": { "local": "2091-07-20T12:08:11+07:00", "utc": "2091-07-20T05:08:11Z", "ms": 3835746490582.9717 }, "end": { "local": "2091-07-20T12:56:11+07:00", "utc": "2091-07-20T05:56:11Z", "ms": 3835749370582.9717 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-07-21", "window": { "start": { "local": "2091-07-21T12:08:14+07:00", "utc": "2091-07-21T05:08:14Z", "ms": 3835832893573.351 }, "end": { "local": "2091-07-21T12:56:14+07:00", "utc": "2091-07-21T05:56:14Z", "ms": 3835835773573.351 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 15:36 on Fri 20 Jul to 13:34 on Sat 21 Jul.", "fact": "2091-07-20T08:35:34Z → 2091-07-21T06:34:13Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 20th, 12:08–12:56 on the 21st.", "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 20th and 48 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 2280 s" }, { "step": "ruling", "text": "Skanda Pañcamī, Medan, 2091: Saturday 21 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": "2091-07-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-21", "confidence": "determinate" } ], "quote": "In Medan, Skanda Pañcamī 2091 falls on Saturday 21 July. Pañcamī runs from 15:36 on Fri 20 Jul to 13:34 on Sat 21 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vivasvat-saptami", "festival": "vivasvat-saptami", "name": "Vivasvat Saptamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2578, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "2091-07-22T11:25:18+07:00", "utc": "2091-07-22T04:25:18Z", "ms": 3835916717627.947 }, "end": { "local": "2091-07-23T09:11:26+07:00", "utc": "2091-07-23T02:11:26Z", "ms": 3835995085758.8745 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-22T11:25:18+07:00", "utc": "2091-07-22T04:25:18Z", "ms": 3835916717627.947 }, "end": { "local": "2091-07-23T09:11:26+07:00", "utc": "2091-07-23T02:11:26Z", "ms": 3835995085758.8745 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-07-22", "window": { "start": { "local": "2091-07-22T12:08:16+07:00", "utc": "2091-07-22T05:08:16Z", "ms": 3835919295973.301 }, "end": { "local": "2091-07-22T12:56:16+07:00", "utc": "2091-07-22T05:56:16Z", "ms": 3835922175973.301 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-07-23", "window": { "start": { "local": "2091-07-23T12:08:18+07:00", "utc": "2091-07-23T05:08:18Z", "ms": 3836005697773.51 }, "end": { "local": "2091-07-23T12:56:18+07:00", "utc": "2091-07-23T05:56:18Z", "ms": 3836008577773.51 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 11:25 on Sun 22 Jul to 09:11 on Mon 23 Jul.", "fact": "2091-07-22T04:25:18Z → 2091-07-23T02:11:26Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 22nd, 12:08–12:56 on the 23rd.", "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 22nd and 0 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 2578 s" }, { "step": "ruling", "text": "Vivasvat Saptamī, Medan, 2091: Sunday 22 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": "2091-07-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-22", "confidence": "determinate" } ], "quote": "In Medan, Vivasvat Saptamī 2091 falls on Sunday 22 July. Saptamī runs from 11:25 on Sun 22 Jul to 09:11 on Mon 23 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-07-26", "festival": "ekadashi", "name": "Hariśayanī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14185, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-07-26T02:27:33+07:00", "utc": "2091-07-25T19:27:33Z", "ms": 3836230053174.924 }, "end": { "local": "2091-07-27T00:23:24+07:00", "utc": "2091-07-26T17:23:24Z", "ms": 3836309003634.312 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-26T02:27:33+07:00", "utc": "2091-07-25T19:27:33Z", "ms": 3836230053174.924 }, "end": { "local": "2091-07-27T00:23:24+07:00", "utc": "2091-07-26T17:23:24Z", "ms": 3836309003634.312 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-07-26", "window": { "start": { "local": "2091-07-26T06:23:58+07:00", "utc": "2091-07-25T23:23:58Z", "ms": 3836244238089.807 }, "end": { "local": "2091-07-26T06:23:58+07:00", "utc": "2091-07-25T23:23:58Z", "ms": 3836244238089.807 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-07-27", "window": { "start": { "local": "2091-07-27T06:24:02+07:00", "utc": "2091-07-26T23:24:02Z", "ms": 3836330641665.349 }, "end": { "local": "2091-07-27T06:24:02+07:00", "utc": "2091-07-26T23:24:02Z", "ms": 3836330641665.349 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 02:28 on Thu 26 Jul to 00:23 on Fri 27 Jul.", "fact": "2091-07-25T19:27:33Z → 2091-07-26T17:23:24Z" }, { "step": "kaala", "text": "Sunrise is at 06:24 on the 26th and 06:24 on the 27th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 26th and is not on the 27th.", "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 14185 s" }, { "step": "ruling", "text": "Hariśayanī Ekādaśī, Medan, 2091: Thursday 26 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": "2091-07-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-26", "confidence": "determinate" } ], "quote": "In Medan, Hariśayanī Ekādaśī 2091 falls on Thursday 26 July. Ekādaśī runs from 02:28 on Thu 26 Jul to 00:23 on Fri 27 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-07-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-07-28", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2584, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-07-27T22:31:37+07:00", "utc": "2091-07-27T15:31:37Z", "ms": 3836388697349.062 }, "end": { "local": "2091-07-28T20:57:23+07:00", "utc": "2091-07-28T13:57:23Z", "ms": 3836469442963.2056 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-27T22:31:37+07:00", "utc": "2091-07-27T15:31:37Z", "ms": 3836388697349.062 }, "end": { "local": "2091-07-28T20:57:23+07:00", "utc": "2091-07-28T13:57:23Z", "ms": 3836469442963.2056 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-07-27", "window": { "start": { "local": "2091-07-27T18:40:36+07:00", "utc": "2091-07-27T11:40:36Z", "ms": 3836374836056.29 }, "end": { "local": "2091-07-27T20:14:24+07:00", "utc": "2091-07-27T13:14:24Z", "ms": 3836380463875.9277 } }, "covered_min": 0, "window_min": 94, "qualifies": false }, { "local_date": "2091-07-28", "window": { "start": { "local": "2091-07-28T18:40:30+07:00", "utc": "2091-07-28T11:40:30Z", "ms": 3836461230479.8438 }, "end": { "local": "2091-07-28T20:14:19+07:00", "utc": "2091-07-28T13:14:19Z", "ms": 3836466859376.314 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 22:32 on Fri 27 Jul to 20:57 on Sat 28 Jul.", "fact": "2091-07-27T15:31:37Z → 2091-07-28T13:57:23Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:41–20:14 on the 27th, 18:41–20:14 on the 28th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 94 minutes on the 27th and 94 of 94 on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 2584 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Saturday 28 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": "2091-07-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-28", "confidence": "boundary" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Saturday 28 July. Trayodaśī runs from 22:32 on Fri 27 Jul to 20:57 on Sat 28 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-07-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shiva-shayanotsava", "festival": "shiva-shayanotsava", "name": "Śiva Śayanotsava", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-29", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 1354, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-07-29", "window": { "start": { "local": "2091-07-29T18:40:24+07:00", "utc": "2091-07-29T11:40:24Z", "ms": 3836547624210.2847 }, "end": { "local": "2091-07-29T20:14:14+07:00", "utc": "2091-07-29T13:14:14Z", "ms": 3836553254204.2236 } }, "covered_min": 28, "window_min": 94, "qualifies": true }, { "local_date": "2091-07-30", "window": { "start": { "local": "2091-07-30T18:40:17+07:00", "utc": "2091-07-30T11:40:17Z", "ms": 3836634017252.4604 }, "end": { "local": "2091-07-30T20:14:08+07:00", "utc": "2091-07-30T13:14:08Z", "ms": 3836639648363.9883 } }, "covered_min": 23, "window_min": 94, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul.", "fact": "2091-07-29T12:46:04Z → 2091-07-30T12:02:52Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:40–20:14 on the 29th, 18:40–20:14 on the 30th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 28 of 94 minutes on the 29th and 23 of 94 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 1354 s" }, { "step": "ruling", "text": "Śiva Śayanotsava, Medan, 2091: Sunday 29 July.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "2091-07-30", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-29", "confidence": "boundary" } ], "quote": "In Medan, Śiva Śayanotsava 2091 falls on Sunday 29 July. Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul and covers 28 of 94 minutes of pradoṣa that evening. It also reaches the next evening for 23 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/medan/festivals/2091/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": "/medan/festivals/2091/vyasa-puja", "festival": "vyasa-puja", "name": "Vyāsa Pūjā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36689, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 } }, "kaala": "udaya-3", "days": [ { "local_date": "2091-07-29", "window": { "start": { "local": "2091-07-29T06:24:07+07:00", "utc": "2091-07-28T23:24:07Z", "ms": 3836503447203.372 }, "end": { "local": "2091-07-29T08:51:23+07:00", "utc": "2091-07-29T01:51:23Z", "ms": 3836512282604.7544 } }, "covered_min": 0, "window_min": 147, "qualifies": false }, { "local_date": "2091-07-30", "window": { "start": { "local": "2091-07-30T06:24:09+07:00", "utc": "2091-07-29T23:24:09Z", "ms": 3836589849164.8257 }, "end": { "local": "2091-07-30T08:51:23+07:00", "utc": "2091-07-30T01:51:23Z", "ms": 3836598682782.3525 } }, "covered_min": 147, "window_min": 147, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul.", "fact": "2091-07-29T12:46:04Z → 2091-07-30T12:02:52Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:24–08:51 on the 29th, 06:24–08:51 on the 30th.", "fact": "udaya-3: day-muhurta-1-3 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must hold through the first three muhūrtas after sunrise. It covers 0 of 147 minutes on the 29th and 147 of 147 on the 30th.", "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 36689 s" }, { "step": "ruling", "text": "Vyāsa Pūjā, Medan, 2091: Monday 30 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": "2091-07-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-30", "confidence": "determinate" } ], "quote": "In Medan, Vyāsa Pūjā 2091 falls on Monday 30 July. Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/guru-purnima", "festival": "guru-purnima", "name": "Guru Pūrṇimā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21998, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-07-29", "window": { "start": { "local": "2091-07-29T12:08:16+07:00", "utc": "2091-07-29T05:08:16Z", "ms": 3836524095706.828 }, "end": { "local": "2091-07-29T12:56:16+07:00", "utc": "2091-07-29T05:56:16Z", "ms": 3836526975706.828 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-07-30", "window": { "start": { "local": "2091-07-30T12:08:13+07:00", "utc": "2091-07-30T05:08:13Z", "ms": 3836610493208.643 }, "end": { "local": "2091-07-30T12:56:13+07:00", "utc": "2091-07-30T05:56:13Z", "ms": 3836613373208.643 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul.", "fact": "2091-07-29T12:46:04Z → 2091-07-30T12:02:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:08–12:56 on the 29th, 12:08–12:56 on the 30th.", "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 29th and 48 of 48 on the 30th.", "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 21998 s" }, { "step": "ruling", "text": "Guru Pūrṇimā, Medan, 2091: Monday 30 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": "2091-07-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-30", "confidence": "determinate" } ], "quote": "In Medan, Guru Pūrṇimā 2091 falls on Monday 30 July. Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/kokila-vrata", "festival": "kokila-vrata", "name": "Kokilā Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1354, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "2091-07-29T19:46:04+07:00", "utc": "2091-07-29T12:46:04Z", "ms": 3836551563779.746 }, "end": { "local": "2091-07-30T19:02:52+07:00", "utc": "2091-07-30T12:02:52Z", "ms": 3836635371621.2637 } }, "kaala": "sayahna", "days": [ { "local_date": "2091-07-29", "window": { "start": { "local": "2091-07-29T16:13:09+07:00", "utc": "2091-07-29T09:13:09Z", "ms": 3836538788808.9023 }, "end": { "local": "2091-07-29T18:40:24+07:00", "utc": "2091-07-29T11:40:24Z", "ms": 3836547624210.2847 } }, "covered_min": 0, "window_min": 147, "qualifies": false }, { "local_date": "2091-07-30", "window": { "start": { "local": "2091-07-30T16:13:04+07:00", "utc": "2091-07-30T09:13:04Z", "ms": 3836625183634.9336 }, "end": { "local": "2091-07-30T18:40:17+07:00", "utc": "2091-07-30T11:40:17Z", "ms": 3836634017252.4604 } }, "covered_min": 147, "window_min": 147, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul.", "fact": "2091-07-29T12:46:04Z → 2091-07-30T12:02:52Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:13–18:40 on the 29th, 16:13–18:40 on the 30th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 0 of 147 minutes on the 29th and 147 of 147 on the 30th.", "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 1354 s" }, { "step": "ruling", "text": "Kokilā Vrata, Medan, 2091: Monday 30 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": "2091-07-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-30", "confidence": "determinate" } ], "quote": "In Medan, Kokilā Vrata 2091 falls on Monday 30 July. Pūrṇimā runs from 19:46 on Sun 29 Jul to 19:03 on Mon 30 Jul and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ashunya-shayana-vrata-ashadha", "festival": "ashunya-shayana-vrata-ashadha", "name": "Aśūnya Śayana Vrata (Āṣāḍha)", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-07-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1963, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "2091-07-31T18:52:11+07:00", "utc": "2091-07-31T11:52:11Z", "ms": 3836721131328.3384 }, "end": { "local": "2091-08-01T19:16:57+07:00", "utc": "2091-08-01T12:16:57Z", "ms": 3836809016727.227 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-07-31T18:52:11+07:00", "utc": "2091-07-31T11:52:11Z", "ms": 3836721131328.3384 }, "end": { "local": "2091-08-01T19:16:57+07:00", "utc": "2091-08-01T12:16:57Z", "ms": 3836809016727.227 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-07-31", "window": { "start": { "local": "2091-07-31T19:24:54+07:00", "utc": "2091-07-31T12:24:54Z", "ms": 3836723094031.8877 }, "end": { "local": "2091-07-31T19:24:54+07:00", "utc": "2091-07-31T12:24:54Z", "ms": 3836723094031.8877 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-08-01", "window": { "start": { "local": "2091-08-01T20:12:07+07:00", "utc": "2091-08-01T13:12:07Z", "ms": 3836812327369.471 }, "end": { "local": "2091-08-01T20:12:07+07:00", "utc": "2091-08-01T13:12:07Z", "ms": 3836812327369.471 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 18:52 on Tue 31 Jul to 19:17 on Wed 1 Aug.", "fact": "2091-07-31T11:52:11Z → 2091-08-01T12:16:57Z" }, { "step": "kaala", "text": "Moonrise is at 19:25 on the 31st and 20:12 on the 1st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā 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. 102" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1963 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata (Āṣāḍha), Medan, 2091: Tuesday 31 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": "2091-07-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-07-31", "confidence": "determinate" } ], "quote": "In Medan, Aśūnya Śayana Vrata (Āṣāḍha) 2091 falls on Tuesday 31 July. Dvitīyā runs from 18:52 on Tue 31 Jul to 19:17 on Wed 1 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-08-02", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-02", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 720, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-08-02T20:17:41+07:00", "utc": "2091-08-02T13:17:41Z", "ms": 3836899061455.1763 }, "end": { "local": "2091-08-03T21:51:53+07:00", "utc": "2091-08-03T14:51:53Z", "ms": 3836991112634.3125 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-02T20:17:41+07:00", "utc": "2091-08-02T13:17:41Z", "ms": 3836899061455.1763 }, "end": { "local": "2091-08-03T21:51:53+07:00", "utc": "2091-08-03T14:51:53Z", "ms": 3836991112634.3125 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-08-02", "window": { "start": { "local": "2091-08-02T20:56:55+07:00", "utc": "2091-08-02T13:56:55Z", "ms": 3836901414792.437 }, "end": { "local": "2091-08-02T20:56:55+07:00", "utc": "2091-08-02T13:56:55Z", "ms": 3836901414792.437 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-08-03", "window": { "start": { "local": "2091-08-03T21:39:53+07:00", "utc": "2091-08-03T14:39:53Z", "ms": 3836990392668.103 }, "end": { "local": "2091-08-03T21:39:53+07:00", "utc": "2091-08-03T14:39:53Z", "ms": 3836990392668.103 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturthī runs from 20:18 on Thu 2 Aug to 21:52 on Fri 3 Aug.", "fact": "2091-08-02T13:17:41Z → 2091-08-03T14:51:53Z" }, { "step": "kaala", "text": "Moonrise is at 20:57 on the 2nd and 21:40 on the 3rd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 2nd and is on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Both moonrises qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 720 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Thursday 2 August.", "fact": "confidence: boundary (tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-08-02", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-02", "confidence": "boundary" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Thursday 2 August. Caturthī runs from 20:18 on Thu 2 Aug to 21:52 on Fri 3 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-08-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-08-11", "festival": "ekadashi", "name": "Kāmikā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13551, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-08-10T10:09:47+07:00", "utc": "2091-08-10T03:09:47Z", "ms": 3837553786689.78 }, "end": { "local": "2091-08-11T10:54:26+07:00", "utc": "2091-08-11T03:54:26Z", "ms": 3837642865605.957 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-10T10:09:47+07:00", "utc": "2091-08-10T03:09:47Z", "ms": 3837553786689.78 }, "end": { "local": "2091-08-11T10:54:26+07:00", "utc": "2091-08-11T03:54:26Z", "ms": 3837642865605.957 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-08-10", "window": { "start": { "local": "2091-08-10T06:23:56+07:00", "utc": "2091-08-09T23:23:56Z", "ms": 3837540235779.834 }, "end": { "local": "2091-08-10T06:23:56+07:00", "utc": "2091-08-09T23:23:56Z", "ms": 3837540235779.834 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-08-11", "window": { "start": { "local": "2091-08-11T06:23:51+07:00", "utc": "2091-08-10T23:23:51Z", "ms": 3837626631458.7603 }, "end": { "local": "2091-08-11T06:23:51+07:00", "utc": "2091-08-10T23:23:51Z", "ms": 3837626631458.7603 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:10 on Fri 10 Aug to 10:54 on Sat 11 Aug.", "fact": "2091-08-10T03:09:47Z → 2091-08-11T03:54:26Z" }, { "step": "kaala", "text": "Sunrise is at 06:24 on the 10th and 06:24 on the 11th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 10th and is on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 13551 s" }, { "step": "ruling", "text": "Kāmikā Ekādaśī, Medan, 2091: Saturday 11 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": "2091-08-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-11", "confidence": "determinate" } ], "quote": "In Medan, Kāmikā Ekādaśī 2091 falls on Saturday 11 August. Ekādaśī runs from 10:10 on Fri 10 Aug to 10:54 on Sat 11 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-08-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-08-12", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27583, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-08-12T10:58:04+07:00", "utc": "2091-08-12T03:58:04Z", "ms": 3837729484111.699 }, "end": { "local": "2091-08-13T10:21:29+07:00", "utc": "2091-08-13T03:21:29Z", "ms": 3837813688581.7485 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-12T10:58:04+07:00", "utc": "2091-08-12T03:58:04Z", "ms": 3837729484111.699 }, "end": { "local": "2091-08-13T10:21:29+07:00", "utc": "2091-08-13T03:21:29Z", "ms": 3837813688581.7485 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-08-12", "window": { "start": { "local": "2091-08-12T18:37:47+07:00", "utc": "2091-08-12T11:37:47Z", "ms": 3837757067094.788 }, "end": { "local": "2091-08-12T20:11:54+07:00", "utc": "2091-08-12T13:11:54Z", "ms": 3837762714323.629 } }, "covered_min": 94, "window_min": 94, "qualifies": true }, { "local_date": "2091-08-13", "window": { "start": { "local": "2091-08-13T18:37:31+07:00", "utc": "2091-08-13T11:37:31Z", "ms": 3837843451199.592 }, "end": { "local": "2091-08-13T20:11:40+07:00", "utc": "2091-08-13T13:11:40Z", "ms": 3837849099771.7725 } }, "covered_min": 0, "window_min": 94, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 10:58 on Sun 12 Aug to 10:21 on Mon 13 Aug.", "fact": "2091-08-12T03:58:04Z → 2091-08-13T03:21:29Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:38–20:12 on the 12th, 18:38–20:12 on the 13th.", "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 12th and 0 of 94 on the 13th.", "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 27583 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Sunday 12 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": "2091-08-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-12", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Sunday 12 August. Trayodaśī runs from 10:58 on Sun 12 Aug to 10:21 on Mon 13 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-08-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-08-13", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29617, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-08-13T10:21:29+07:00", "utc": "2091-08-13T03:21:29Z", "ms": 3837813688581.7485 }, "end": { "local": "2091-08-14T09:08:10+07:00", "utc": "2091-08-14T02:08:10Z", "ms": 3837895690212.919 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-13T10:21:29+07:00", "utc": "2091-08-13T03:21:29Z", "ms": 3837813688581.7485 }, "end": { "local": "2091-08-14T09:08:10+07:00", "utc": "2091-08-14T02:08:10Z", "ms": 3837895690212.919 } }, "kaala": "nishita", "days": [ { "local_date": "2091-08-12", "window": { "start": { "local": "2091-08-13T00:06:44+07:00", "utc": "2091-08-12T17:06:44Z", "ms": 3837776804202.9404 }, "end": { "local": "2091-08-13T00:54:44+07:00", "utc": "2091-08-12T17:54:44Z", "ms": 3837779684202.9404 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-08-13", "window": { "start": { "local": "2091-08-14T00:06:33+07:00", "utc": "2091-08-13T17:06:33Z", "ms": 3837863193345.269 }, "end": { "local": "2091-08-14T00:54:33+07:00", "utc": "2091-08-13T17:54:33Z", "ms": 3837866073345.269 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:21 on Mon 13 Aug to 09:08 on Tue 14 Aug.", "fact": "2091-08-13T03:21:29Z → 2091-08-14T02:08:10Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:07–00:55 on the 12th, 00:07–00:55 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 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. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 29617 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Monday 13 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": "2091-08-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-13", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Monday 13 August. Caturdaśī runs from 10:21 on Mon 13 Aug to 09:08 on Tue 14 Aug and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-08-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/madhusrava-tritiya", "festival": "madhusrava-tritiya", "name": "Madhusravā Tṛtīyā", "everyday": "Hariyali Teej", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33544, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-08-17T02:46:44+07:00", "utc": "2091-08-16T19:46:44Z", "ms": 3838132004322.7515 }, "end": { "local": "2091-08-18T00:08:28+07:00", "utc": "2091-08-17T17:08:28Z", "ms": 3838208907576.2964 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-17T02:46:44+07:00", "utc": "2091-08-16T19:46:44Z", "ms": 3838132004322.7515 }, "end": { "local": "2091-08-18T00:08:28+07:00", "utc": "2091-08-17T17:08:28Z", "ms": 3838208907576.2964 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-08-17", "window": { "start": { "local": "2091-08-17T12:05:48+07:00", "utc": "2091-08-17T05:05:48Z", "ms": 3838165548461.0835 }, "end": { "local": "2091-08-17T12:53:48+07:00", "utc": "2091-08-17T05:53:48Z", "ms": 3838168428461.0835 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-08-18", "window": { "start": { "local": "2091-08-18T12:05:35+07:00", "utc": "2091-08-18T05:05:35Z", "ms": 3838251935199.698 }, "end": { "local": "2091-08-18T12:53:35+07:00", "utc": "2091-08-18T05:53:35Z", "ms": 3838254815199.698 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 02:47 on Fri 17 Aug to 00:08 on Sat 18 Aug.", "fact": "2091-08-16T19:46:44Z → 2091-08-17T17:08:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:06–12:54 on the 17th, 12:06–12:54 on the 18th.", "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 17th and 0 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33544 s" }, { "step": "ruling", "text": "Madhusravā Tṛtīyā, Medan, 2091: Friday 17 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": "2091-08-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-17", "confidence": "determinate" } ], "quote": "In Medan, Madhusravā Tṛtīyā (Hariyali Teej) 2091 falls on Friday 17 August. Tṛtīyā runs from 02:47 on Fri 17 Aug to 00:08 on Sat 18 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-08-18", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30738, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-08-18T00:08:28+07:00", "utc": "2091-08-17T17:08:28Z", "ms": 3838208907576.2964 }, "end": { "local": "2091-08-18T21:25:53+07:00", "utc": "2091-08-18T14:25:53Z", "ms": 3838285552786.025 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-18T00:08:28+07:00", "utc": "2091-08-17T17:08:28Z", "ms": 3838208907576.2964 }, "end": { "local": "2091-08-18T21:25:53+07:00", "utc": "2091-08-18T14:25:53Z", "ms": 3838285552786.025 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-08-17", "window": { "start": { "local": "2091-08-17T12:05:48+07:00", "utc": "2091-08-17T05:05:48Z", "ms": 3838165548461.0835 }, "end": { "local": "2091-08-17T12:53:48+07:00", "utc": "2091-08-17T05:53:48Z", "ms": 3838168428461.0835 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-08-18", "window": { "start": { "local": "2091-08-18T12:05:35+07:00", "utc": "2091-08-18T05:05:35Z", "ms": 3838251935199.698 }, "end": { "local": "2091-08-18T12:53:35+07:00", "utc": "2091-08-18T05:53:35Z", "ms": 3838254815199.698 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 00:08 on Sat 18 Aug to 21:26 on Sat 18 Aug.", "fact": "2091-08-17T17:08:28Z → 2091-08-18T14:25:53Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:06–12:54 on the 17th, 12:06–12:54 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 30738 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Saturday 18 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": "2091-08-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-18", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Saturday 18 August. Caturthī runs from 00:08 on Sat 18 Aug to 21:26 on Sat 18 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-08-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/naga-panchami", "festival": "naga-panchami", "name": "Nāga Pañcamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21104, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-08-18T21:25:53+07:00", "utc": "2091-08-18T14:25:53Z", "ms": 3838285552786.025 }, "end": { "local": "2091-08-19T18:45:05+07:00", "utc": "2091-08-19T11:45:05Z", "ms": 3838362305297.255 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-18T21:25:53+07:00", "utc": "2091-08-18T14:25:53Z", "ms": 3838285552786.025 }, "end": { "local": "2091-08-19T18:45:05+07:00", "utc": "2091-08-19T11:45:05Z", "ms": 3838362305297.255 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-08-18", "window": { "start": { "local": "2091-08-18T12:05:35+07:00", "utc": "2091-08-18T05:05:35Z", "ms": 3838251935199.698 }, "end": { "local": "2091-08-18T12:53:35+07:00", "utc": "2091-08-18T05:53:35Z", "ms": 3838254815199.698 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-08-19", "window": { "start": { "local": "2091-08-19T12:05:21+07:00", "utc": "2091-08-19T05:05:21Z", "ms": 3838338321426.2666 }, "end": { "local": "2091-08-19T12:53:21+07:00", "utc": "2091-08-19T05:53:21Z", "ms": 3838341201426.2666 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 21:26 on Sat 18 Aug to 18:45 on Sun 19 Aug.", "fact": "2091-08-18T14:25:53Z → 2091-08-19T11:45:05Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:06–12:54 on the 18th, 12:05–12:53 on the 19th.", "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 18th and 48 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: paraviddha → only-day · margin 21104 s" }, { "step": "ruling", "text": "Nāga Pañcamī, Medan, 2091: Sunday 19 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": "2091-08-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-19", "confidence": "determinate" } ], "quote": "In Medan, Nāga Pañcamī 2091 falls on Sunday 19 August. Pañcamī runs from 21:26 on Sat 18 Aug to 18:45 on Sun 19 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-08-25", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3955, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-08-24T08:30:27+07:00", "utc": "2091-08-24T01:30:27Z", "ms": 3838757427289.2666 }, "end": { "local": "2091-08-25T07:27:55+07:00", "utc": "2091-08-25T00:27:55Z", "ms": 3838840075400.885 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-24T08:30:27+07:00", "utc": "2091-08-24T01:30:27Z", "ms": 3838757427289.2666 }, "end": { "local": "2091-08-25T07:27:55+07:00", "utc": "2091-08-25T00:27:55Z", "ms": 3838840075400.885 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-08-24", "window": { "start": { "local": "2091-08-24T06:22:11+07:00", "utc": "2091-08-23T23:22:11Z", "ms": 3838749730920.729 }, "end": { "local": "2091-08-24T06:22:11+07:00", "utc": "2091-08-23T23:22:11Z", "ms": 3838749730920.729 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-08-25", "window": { "start": { "local": "2091-08-25T06:22:00+07:00", "utc": "2091-08-24T23:22:00Z", "ms": 3838836120000.067 }, "end": { "local": "2091-08-25T06:22:00+07:00", "utc": "2091-08-24T23:22:00Z", "ms": 3838836120000.067 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 08:30 on Fri 24 Aug to 07:28 on Sat 25 Aug.", "fact": "2091-08-24T01:30:27Z → 2091-08-25T00:27:55Z" }, { "step": "kaala", "text": "Sunrise is at 06:22 on the 24th and 06:22 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 3955 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Medan, 2091: Saturday 25 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": "2091-08-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-25", "confidence": "determinate" } ], "quote": "In Medan, Putradā Ekādaśī 2091 falls on Saturday 25 August. Ekādaśī runs from 08:30 on Fri 24 Aug to 07:28 on Sat 25 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-08-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/damodara-dvadashi", "festival": "damodara-dvadashi", "name": "Dāmodara Dvādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16553, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-08-25T07:27:55+07:00", "utc": "2091-08-25T00:27:55Z", "ms": 3838840075400.885 }, "end": { "local": "2091-08-26T06:50:28+07:00", "utc": "2091-08-25T23:50:28Z", "ms": 3838924228174.3926 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-25T07:27:55+07:00", "utc": "2091-08-25T00:27:55Z", "ms": 3838840075400.885 }, "end": { "local": "2091-08-26T06:50:28+07:00", "utc": "2091-08-25T23:50:28Z", "ms": 3838924228174.3926 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-08-25", "window": { "start": { "local": "2091-08-25T12:03:49+07:00", "utc": "2091-08-25T05:03:49Z", "ms": 3838856628638.301 }, "end": { "local": "2091-08-25T12:51:49+07:00", "utc": "2091-08-25T05:51:49Z", "ms": 3838859508638.301 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-08-26", "window": { "start": { "local": "2091-08-26T12:03:32+07:00", "utc": "2091-08-26T05:03:32Z", "ms": 3838943011614.975 }, "end": { "local": "2091-08-26T12:51:32+07:00", "utc": "2091-08-26T05:51:32Z", "ms": 3838945891614.975 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 07:28 on Sat 25 Aug to 06:50 on Sun 26 Aug.", "fact": "2091-08-25T00:27:55Z → 2091-08-25T23:50:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:04–12:52 on the 25th, 12:04–12:52 on the 26th.", "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 25th and 0 of 48 on the 26th.", "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 16553 s" }, { "step": "ruling", "text": "Dāmodara Dvādaśī, Medan, 2091: Saturday 25 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": "2091-08-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-25", "confidence": "determinate" } ], "quote": "In Medan, Dāmodara Dvādaśī 2091 falls on Saturday 25 August. Dvādaśī runs from 07:28 on Sat 25 Aug to 06:50 on Sun 26 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pradosha-vrata?on=2091-08-26", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37909, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-08-26T06:50:28+07:00", "utc": "2091-08-25T23:50:28Z", "ms": 3838924228174.3926 }, "end": { "local": "2091-08-27T06:39:31+07:00", "utc": "2091-08-26T23:39:31Z", "ms": 3839009970830.828 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-26T06:50:28+07:00", "utc": "2091-08-25T23:50:28Z", "ms": 3838924228174.3926 }, "end": { "local": "2091-08-27T06:39:31+07:00", "utc": "2091-08-26T23:39:31Z", "ms": 3839009970830.828 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-08-25", "window": { "start": { "local": "2091-08-25T18:33:37+07:00", "utc": "2091-08-25T11:33:37Z", "ms": 3838880017276.535 }, "end": { "local": "2091-08-25T20:08:03+07:00", "utc": "2091-08-25T13:08:03Z", "ms": 3838885682797.2417 } }, "covered_min": 0, "window_min": 94, "qualifies": false }, { "local_date": "2091-08-26", "window": { "start": { "local": "2091-08-26T18:33:15+07:00", "utc": "2091-08-26T11:33:15Z", "ms": 3838966394548.1157 }, "end": { "local": "2091-08-26T20:07:42+07:00", "utc": "2091-08-26T13:07:42Z", "ms": 3838972061539.3926 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 06:50 on Sun 26 Aug to 06:40 on Mon 27 Aug.", "fact": "2091-08-25T23:50:28Z → 2091-08-26T23:39:31Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:34–20:08 on the 25th, 18:33–20:08 on the 26th.", "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 94 minutes on the 25th and 94 of 94 on the 26th.", "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 37909 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Sunday 26 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": "2091-08-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-26", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Sunday 26 August. Trayodaśī runs from 06:50 on Sun 26 Aug to 06:40 on Mon 27 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-08-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/raksha-bandhana", "festival": "raksha-bandhana", "name": "Rakṣā Bandhana", "everyday": "Rakhi", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-28", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 4789, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-08-28T06:56:10+07:00", "utc": "2091-08-27T23:56:10Z", "ms": 3839097369878.2183 }, "end": { "local": "2091-08-29T07:41:02+07:00", "utc": "2091-08-29T00:41:02Z", "ms": 3839186461586.25 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "second-half", "start": { "local": "2091-08-28T19:15:04+07:00", "utc": "2091-08-28T12:15:04Z", "ms": 3839141703591.419 }, "end": { "local": "2091-08-29T07:41:02+07:00", "utc": "2091-08-29T00:41:02Z", "ms": 3839186461586.25 } }, "kaala": "day", "days": [ { "local_date": "2091-08-28", "window": { "start": { "local": "2091-08-28T06:21:25+07:00", "utc": "2091-08-27T23:21:25Z", "ms": 3839095284920.041 }, "end": { "local": "2091-08-29T06:21:13+07:00", "utc": "2091-08-28T23:21:13Z", "ms": 3839181672511.8306 } }, "covered_min": 666, "window_min": 1440, "qualifies": true }, { "local_date": "2091-08-29", "window": { "start": { "local": "2091-08-29T06:21:13+07:00", "utc": "2091-08-28T23:21:13Z", "ms": 3839181672511.8306 }, "end": { "local": "2091-08-30T06:21:00+07:00", "utc": "2091-08-29T23:21:00Z", "ms": 3839268059776.353 } }, "covered_min": 80, "window_min": 1440, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 06:56 on Tue 28 Aug to 07:41 on Wed 29 Aug. Its second half begins at 19:15 on Tue 28 Aug.", "fact": "2091-08-27T23:56:10Z → 2091-08-29T00:41:02Z · second half from 2091-08-28T12:15:04Z" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 06:21 on the 28th, and from 06:21 on the 29th.", "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 666 of 1440 minutes on the 28th and 80 of 1440 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Both days qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 4789 s" }, { "step": "ruling", "text": "Rakṣā Bandhana, Medan, 2091: Tuesday 28 August.", "fact": "confidence: boundary (tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "raksha-bandhana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Rakhi purnima, Naroli purnima (Cocoanut day), Raksa Bandhana (in the second half of purnima), Rsi tarpana (madhyahna vyapini), Hayagriva utpatti, Jhulanayatra samapana" } ], "kaala": "day", "priority": "unstated", "when_absent": "unstated", "half": "second" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-08-28", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-28", "confidence": "boundary" } ], "quote": "In Medan, Rakṣā Bandhana (Rakhi) 2091 falls on Tuesday 28 August. The second half of Pūrṇimā runs from 19:15 on Tue 28 Aug to 07:41 on Wed 29 Aug and falls on two days: 666 minutes of it on the 28th, 80 on the 29th; the rule does not say which to take, and the day that holds more of it is ruled: treat the date as contested.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/rishi-tarpana", "festival": "rishi-tarpana", "name": "Ṛṣi Tarpaṇa", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15697, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-08-28T06:56:10+07:00", "utc": "2091-08-27T23:56:10Z", "ms": 3839097369878.2183 }, "end": { "local": "2091-08-29T07:41:02+07:00", "utc": "2091-08-29T00:41:02Z", "ms": 3839186461586.25 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "2091-08-28T06:56:10+07:00", "utc": "2091-08-27T23:56:10Z", "ms": 3839097369878.2183 }, "end": { "local": "2091-08-29T07:41:02+07:00", "utc": "2091-08-29T00:41:02Z", "ms": 3839186461586.25 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-08-28", "window": { "start": { "local": "2091-08-28T12:02:56+07:00", "utc": "2091-08-28T05:02:56Z", "ms": 3839115776386.8574 }, "end": { "local": "2091-08-28T12:50:56+07:00", "utc": "2091-08-28T05:50:56Z", "ms": 3839118656386.8574 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-08-29", "window": { "start": { "local": "2091-08-29T12:02:38+07:00", "utc": "2091-08-29T05:02:38Z", "ms": 3839202158220.2324 }, "end": { "local": "2091-08-29T12:50:38+07:00", "utc": "2091-08-29T05:50:38Z", "ms": 3839205038220.2324 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 06:56 on Tue 28 Aug to 07:41 on Wed 29 Aug.", "fact": "2091-08-27T23:56:10Z → 2091-08-29T00:41:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 28th, 12:03–12:51 on the 29th.", "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 28th and 0 of 48 on the 29th.", "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 15697 s" }, { "step": "ruling", "text": "Ṛṣi Tarpaṇa, Medan, 2091: Tuesday 28 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": "2091-08-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-28", "confidence": "determinate" } ], "quote": "In Medan, Ṛṣi Tarpaṇa 2091 falls on Tuesday 28 August. Pūrṇimā runs from 06:56 on Tue 28 Aug to 07:41 on Wed 29 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ashunya-shayana-vrata", "festival": "ashunya-shayana-vrata", "name": "Aśūnya Śayana Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-08-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35070, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "2091-08-30T08:53:50+07:00", "utc": "2091-08-30T01:53:50Z", "ms": 3839277230206.497 }, "end": { "local": "2091-08-31T10:32:57+07:00", "utc": "2091-08-31T03:32:57Z", "ms": 3839369577390.9316 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-08-30T08:53:50+07:00", "utc": "2091-08-30T01:53:50Z", "ms": 3839277230206.497 }, "end": { "local": "2091-08-31T10:32:57+07:00", "utc": "2091-08-31T03:32:57Z", "ms": 3839369577390.9316 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-08-30", "window": { "start": { "local": "2091-08-30T19:35:07+07:00", "utc": "2091-08-30T12:35:07Z", "ms": 3839315707219.9624 }, "end": { "local": "2091-08-30T19:35:07+07:00", "utc": "2091-08-30T12:35:07Z", "ms": 3839315707219.9624 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-08-31", "window": { "start": { "local": "2091-08-31T20:17:27+07:00", "utc": "2091-08-31T13:17:27Z", "ms": 3839404646932.253 }, "end": { "local": "2091-08-31T20:17:27+07:00", "utc": "2091-08-31T13:17:27Z", "ms": 3839404646932.253 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 08:54 on Thu 30 Aug to 10:33 on Fri 31 Aug.", "fact": "2091-08-30T01:53:50Z → 2091-08-31T03:32:57Z" }, { "step": "kaala", "text": "Moonrise is at 19:35 on the 30th and 20:17 on the 31st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā must be current at moonrise. It is on the 30th and is not on the 31st.", "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 35070 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata, Medan, 2091: Thursday 30 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": "2091-08-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-08-30", "confidence": "determinate" } ], "quote": "In Medan, Aśūnya Śayana Vrata 2091 falls on Thursday 30 August. Dvitīyā runs from 08:54 on Thu 30 Aug to 10:33 on Fri 31 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/kajjali-tritiya", "festival": "kajjali-tritiya", "name": "Kajjalī Tṛtīyā", "everyday": "Kajari Teej", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 894, "anga": { "type": "tithi", "index": 17, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-08-31T10:32:57+07:00", "utc": "2091-08-31T03:32:57Z", "ms": 3839369577390.9316 }, "end": { "local": "2091-09-01T12:34:48+07:00", "utc": "2091-09-01T05:34:48Z", "ms": 3839463287929.107 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-08-31T10:32:57+07:00", "utc": "2091-08-31T03:32:57Z", "ms": 3839369577390.9316 }, "end": { "local": "2091-09-01T12:34:48+07:00", "utc": "2091-09-01T05:34:48Z", "ms": 3839463287929.107 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-08-31", "window": { "start": { "local": "2091-08-31T12:02:01+07:00", "utc": "2091-08-31T05:02:01Z", "ms": 3839374920879.5713 }, "end": { "local": "2091-08-31T12:50:01+07:00", "utc": "2091-08-31T05:50:01Z", "ms": 3839377800879.5713 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-09-01", "window": { "start": { "local": "2091-09-01T12:01:42+07:00", "utc": "2091-09-01T05:01:42Z", "ms": 3839461301744.916 }, "end": { "local": "2091-09-01T12:49:42+07:00", "utc": "2091-09-01T05:49:42Z", "ms": 3839464181744.916 } }, "covered_min": 33, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 10:33 on Fri 31 Aug to 12:35 on Sat 1 Sep.", "fact": "2091-08-31T03:32:57Z → 2091-09-01T05:34:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:02–12:50 on the 31st, 12:02–12:50 on the 1st.", "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 31st and 33 of 48 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Both middays qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 894 s" }, { "step": "ruling", "text": "Kajjalī Tṛtīyā, Medan, 2091: Saturday 1 September.", "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": "2091-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-01", "confidence": "determinate" } ], "quote": "In Medan, Kajjalī Tṛtīyā (Kajari Teej) 2091 falls on Saturday 1 September. Tṛtīyā runs from 10:33 on Fri 31 Aug to 12:35 on Sat 1 Sep and covers 33 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/bahula-chaturthi", "festival": "bahula-chaturthi", "name": "Bahulā Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4262, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-09-01T12:34:48+07:00", "utc": "2091-09-01T05:34:48Z", "ms": 3839463287929.107 }, "end": { "local": "2091-09-02T14:53:21+07:00", "utc": "2091-09-02T07:53:21Z", "ms": 3839558001422.5493 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-01T12:34:48+07:00", "utc": "2091-09-01T05:34:48Z", "ms": 3839463287929.107 }, "end": { "local": "2091-09-02T14:53:21+07:00", "utc": "2091-09-02T07:53:21Z", "ms": 3839558001422.5493 } }, "kaala": "sayahna", "days": [ { "local_date": "2091-09-01", "window": { "start": { "local": "2091-09-01T16:04:47+07:00", "utc": "2091-09-01T09:04:47Z", "ms": 3839475886753.351 }, "end": { "local": "2091-09-01T18:30:50+07:00", "utc": "2091-09-01T11:30:50Z", "ms": 3839484650092.3076 } }, "covered_min": 146, "window_min": 146, "qualifies": true }, { "local_date": "2091-09-02", "window": { "start": { "local": "2091-09-02T16:04:24+07:00", "utc": "2091-09-02T09:04:24Z", "ms": 3839562263848.316 }, "end": { "local": "2091-09-02T18:30:25+07:00", "utc": "2091-09-02T11:30:25Z", "ms": 3839571024862.604 } }, "covered_min": 0, "window_min": 146, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:35 on Sat 1 Sep to 14:53 on Sun 2 Sep.", "fact": "2091-09-01T05:34:48Z → 2091-09-02T07:53:21Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:05–18:31 on the 1st, 16:04–18:30 on the 2nd.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during sāyāhna. It covers 146 of 146 minutes on the 1st and 0 of 146 on the 2nd.", "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 4262 s" }, { "step": "ruling", "text": "Bahulā Caturthī, Medan, 2091: Saturday 1 September.", "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": "2091-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-01", "confidence": "determinate" } ], "quote": "In Medan, Bahulā Caturthī 2091 falls on Saturday 1 September. Caturthī runs from 12:35 on Sat 1 Sep to 14:53 on Sun 2 Sep and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-09-01", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24453, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-09-01T12:34:48+07:00", "utc": "2091-09-01T05:34:48Z", "ms": 3839463287929.107 }, "end": { "local": "2091-09-02T14:53:21+07:00", "utc": "2091-09-02T07:53:21Z", "ms": 3839558001422.5493 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-01T12:34:48+07:00", "utc": "2091-09-01T05:34:48Z", "ms": 3839463287929.107 }, "end": { "local": "2091-09-02T14:53:21+07:00", "utc": "2091-09-02T07:53:21Z", "ms": 3839558001422.5493 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-09-01", "window": { "start": { "local": "2091-09-01T20:59:10+07:00", "utc": "2091-09-01T13:59:10Z", "ms": 3839493549521.9785 }, "end": { "local": "2091-09-01T20:59:10+07:00", "utc": "2091-09-01T13:59:10Z", "ms": 3839493549521.9785 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-09-02", "window": { "start": { "local": "2091-09-02T21:40:55+07:00", "utc": "2091-09-02T14:40:55Z", "ms": 3839582454752.3936 }, "end": { "local": "2091-09-02T21:40:55+07:00", "utc": "2091-09-02T14:40:55Z", "ms": 3839582454752.3936 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:35 on Sat 1 Sep to 14:53 on Sun 2 Sep.", "fact": "2091-09-01T05:34:48Z → 2091-09-02T07:53:21Z" }, { "step": "kaala", "text": "Moonrise is at 20:59 on the 1st and 21:41 on the 2nd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 1st and is not 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 24453 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Saturday 1 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": "2091-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-01", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Saturday 1 September. Caturthī runs from 12:35 on Sat 1 Sep to 14:53 on Sun 2 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-09-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/hala-shashthi", "festival": "hala-shashthi", "name": "Hala Ṣaṣṭhī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16261, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-09-03T17:20:03+07:00", "utc": "2091-09-03T10:20:03Z", "ms": 3839653203168.547 }, "end": { "local": "2091-09-04T19:44:07+07:00", "utc": "2091-09-04T12:44:07Z", "ms": 3839748247084.232 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-03T17:20:03+07:00", "utc": "2091-09-03T10:20:03Z", "ms": 3839653203168.547 }, "end": { "local": "2091-09-04T19:44:07+07:00", "utc": "2091-09-04T12:44:07Z", "ms": 3839748247084.232 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-03", "window": { "start": { "local": "2091-09-03T12:01:03+07:00", "utc": "2091-09-03T05:01:03Z", "ms": 3839634062644.9604 }, "end": { "local": "2091-09-03T12:49:03+07:00", "utc": "2091-09-03T05:49:03Z", "ms": 3839636942644.9604 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-09-04", "window": { "start": { "local": "2091-09-04T12:00:43+07:00", "utc": "2091-09-04T05:00:43Z", "ms": 3839720442718.4785 }, "end": { "local": "2091-09-04T12:48:43+07:00", "utc": "2091-09-04T05:48:43Z", "ms": 3839723322718.4785 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 17:20 on Mon 3 Sep to 19:44 on Tue 4 Sep.", "fact": "2091-09-03T10:20:03Z → 2091-09-04T12:44:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:01–12:49 on the 3rd, 12:01–12:49 on the 4th.", "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 3rd and 48 of 48 on the 4th.", "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 16261 s" }, { "step": "ruling", "text": "Hala Ṣaṣṭhī, Medan, 2091: Tuesday 4 September.", "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": "2091-09-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-04", "confidence": "determinate" } ], "quote": "In Medan, Hala Ṣaṣṭhī 2091 falls on Tuesday 4 September. Ṣaṣṭhī runs from 17:20 on Mon 3 Sep to 19:44 on Tue 4 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/janmashtami", "festival": "janmashtami", "name": "Janmāṣṭamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1386, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-09-05T21:53:36+07:00", "utc": "2091-09-05T14:53:36Z", "ms": 3839842415841.634 }, "end": { "local": "2091-09-06T23:36:49+07:00", "utc": "2091-09-06T16:36:49Z", "ms": 3839935009272.574 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-05T21:53:36+07:00", "utc": "2091-09-05T14:53:36Z", "ms": 3839842415841.634 }, "end": { "local": "2091-09-06T23:36:49+07:00", "utc": "2091-09-06T16:36:49Z", "ms": 3839935009272.574 } }, "kaala": "nishita", "days": [ { "local_date": "2091-09-05", "window": { "start": { "local": "2091-09-06T00:00:15+07:00", "utc": "2091-09-05T17:00:15Z", "ms": 3839850015310.9385 }, "end": { "local": "2091-09-06T00:48:15+07:00", "utc": "2091-09-05T17:48:15Z", "ms": 3839852895310.9385 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-09-06", "window": { "start": { "local": "2091-09-06T23:59:55+07:00", "utc": "2091-09-06T16:59:55Z", "ms": 3839936394861.869 }, "end": { "local": "2091-09-07T00:47:55+07:00", "utc": "2091-09-06T17:47:55Z", "ms": 3839939274861.869 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 21:54 on Wed 5 Sep to 23:37 on Thu 6 Sep.", "fact": "2091-09-05T14:53:36Z → 2091-09-06T16:36:49Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:00–00:48 on the 5th, 00:00–00:48 on the 6th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī 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. 103" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 1386 s" }, { "step": "ruling", "text": "Janmāṣṭamī, Medan, 2091: Wednesday 5 September.", "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": "2091-09-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-05", "confidence": "determinate" } ], "quote": "In Medan, Janmāṣṭamī 2091 falls on Wednesday 5 September. Aṣṭamī runs from 21:54 on Wed 5 Sep to 23:37 on Thu 6 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/shitala-saptami", "festival": "shitala-saptami", "name": "Śītalā Saptamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24924, "anga": { "type": "tithi", "index": 21, "key": "saptami", "name": "Saptamī", "start": { "local": "2091-09-04T19:44:07+07:00", "utc": "2091-09-04T12:44:07Z", "ms": 3839748247084.232 }, "end": { "local": "2091-09-05T21:53:36+07:00", "utc": "2091-09-05T14:53:36Z", "ms": 3839842415841.634 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-04T19:44:07+07:00", "utc": "2091-09-04T12:44:07Z", "ms": 3839748247084.232 }, "end": { "local": "2091-09-05T21:53:36+07:00", "utc": "2091-09-05T14:53:36Z", "ms": 3839842415841.634 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-04", "window": { "start": { "local": "2091-09-04T12:00:43+07:00", "utc": "2091-09-04T05:00:43Z", "ms": 3839720442718.4785 }, "end": { "local": "2091-09-04T12:48:43+07:00", "utc": "2091-09-04T05:48:43Z", "ms": 3839723322718.4785 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-09-05", "window": { "start": { "local": "2091-09-05T12:00:23+07:00", "utc": "2091-09-05T05:00:23Z", "ms": 3839806822566.6016 }, "end": { "local": "2091-09-05T12:48:23+07:00", "utc": "2091-09-05T05:48:23Z", "ms": 3839809702566.6016 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 19:44 on Tue 4 Sep to 21:54 on Wed 5 Sep.", "fact": "2091-09-04T12:44:07Z → 2091-09-05T14:53:36Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:01–12:49 on the 4th, 12:00–12:48 on the 5th.", "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 4th and 48 of 48 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 24924 s" }, { "step": "ruling", "text": "Śītalā Saptamī, Medan, 2091: Wednesday 5 September.", "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": "2091-09-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-05", "confidence": "determinate" } ], "quote": "In Medan, Śītalā Saptamī 2091 falls on Wednesday 5 September. Saptamī runs from 19:44 on Tue 4 Sep to 21:54 on Wed 5 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-09-09", "festival": "ekadashi", "name": "Ajā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18619, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-09-09T01:08:20+07:00", "utc": "2091-09-08T18:08:20Z", "ms": 3840113299627.8623 }, "end": { "local": "2091-09-10T00:46:50+07:00", "utc": "2091-09-09T17:46:50Z", "ms": 3840198409500.2964 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-09T01:08:20+07:00", "utc": "2091-09-08T18:08:20Z", "ms": 3840113299627.8623 }, "end": { "local": "2091-09-10T00:46:50+07:00", "utc": "2091-09-09T17:46:50Z", "ms": 3840198409500.2964 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-09-09", "window": { "start": { "local": "2091-09-09T06:18:38+07:00", "utc": "2091-09-08T23:18:38Z", "ms": 3840131918458.919 }, "end": { "local": "2091-09-09T06:18:38+07:00", "utc": "2091-09-08T23:18:38Z", "ms": 3840131918458.919 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-09-10", "window": { "start": { "local": "2091-09-10T06:18:23+07:00", "utc": "2091-09-09T23:18:23Z", "ms": 3840218303324.046 }, "end": { "local": "2091-09-10T06:18:23+07:00", "utc": "2091-09-09T23:18:23Z", "ms": 3840218303324.046 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 01:08 on Sun 9 Sep to 00:47 on Mon 10 Sep.", "fact": "2091-09-08T18:08:20Z → 2091-09-09T17:46:50Z" }, { "step": "kaala", "text": "Sunrise is at 06:19 on the 9th and 06:18 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 18619 s" }, { "step": "ruling", "text": "Ajā Ekādaśī, Medan, 2091: Sunday 9 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": "2091-09-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-09", "confidence": "determinate" } ], "quote": "In Medan, Ajā Ekādaśī 2091 falls on Sunday 9 September. Ekādaśī runs from 01:08 on Sun 9 Sep to 00:47 on Mon 10 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-09-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-09-11", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6622, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-09-10T23:40:03+07:00", "utc": "2091-09-10T16:40:03Z", "ms": 3840280802883.6133 }, "end": { "local": "2091-09-11T21:51:42+07:00", "utc": "2091-09-11T14:51:42Z", "ms": 3840360701522.34 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-10T23:40:03+07:00", "utc": "2091-09-10T16:40:03Z", "ms": 3840280802883.6133 }, "end": { "local": "2091-09-11T21:51:42+07:00", "utc": "2091-09-11T14:51:42Z", "ms": 3840360701522.34 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-09-10", "window": { "start": { "local": "2091-09-10T18:26:55+07:00", "utc": "2091-09-10T11:26:55Z", "ms": 3840262014834.776 }, "end": { "local": "2091-09-10T20:01:45+07:00", "utc": "2091-09-10T13:01:45Z", "ms": 3840267704600.036 } }, "covered_min": 0, "window_min": 95, "qualifies": false }, { "local_date": "2091-09-11", "window": { "start": { "local": "2091-09-11T18:26:28+07:00", "utc": "2091-09-11T11:26:28Z", "ms": 3840348387848.3438 }, "end": { "local": "2091-09-11T20:01:19+07:00", "utc": "2091-09-11T13:01:19Z", "ms": 3840354079165.1636 } }, "covered_min": 95, "window_min": 95, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 23:40 on Mon 10 Sep to 21:52 on Tue 11 Sep.", "fact": "2091-09-10T16:40:03Z → 2091-09-11T14:51:42Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:27–20:02 on the 10th, 18:26–20:01 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 0 of 95 minutes on the 10th and 95 of 95 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 6622 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Tuesday 11 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": "2091-09-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-11", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Tuesday 11 September. Trayodaśī runs from 23:40 on Mon 10 Sep to 21:52 on Tue 11 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-09-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-09-11", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7589, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-09-11T21:51:42+07:00", "utc": "2091-09-11T14:51:42Z", "ms": 3840360701522.34 }, "end": { "local": "2091-09-12T19:27:51+07:00", "utc": "2091-09-12T12:27:51Z", "ms": 3840438470527.6357 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-11T21:51:42+07:00", "utc": "2091-09-11T14:51:42Z", "ms": 3840360701522.34 }, "end": { "local": "2091-09-12T19:27:51+07:00", "utc": "2091-09-12T12:27:51Z", "ms": 3840438470527.6357 } }, "kaala": "nishita", "days": [ { "local_date": "2091-09-11", "window": { "start": { "local": "2091-09-11T23:58:10+07:00", "utc": "2091-09-11T16:58:10Z", "ms": 3840368290286.419 }, "end": { "local": "2091-09-12T00:46:10+07:00", "utc": "2091-09-11T17:46:10Z", "ms": 3840371170286.419 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-09-12", "window": { "start": { "local": "2091-09-12T23:57:49+07:00", "utc": "2091-09-12T16:57:49Z", "ms": 3840454669024.0327 }, "end": { "local": "2091-09-13T00:45:49+07:00", "utc": "2091-09-12T17:45:49Z", "ms": 3840457549024.0327 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 21:52 on Tue 11 Sep to 19:28 on Wed 12 Sep.", "fact": "2091-09-11T14:51:42Z → 2091-09-12T12:27:51Z" }, { "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 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 7589 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Tuesday 11 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": "2091-09-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-11", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Tuesday 11 September. Caturdaśī runs from 21:52 on Tue 11 Sep to 19:28 on Wed 12 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-09-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/aghora-chaturdashi", "festival": "aghora-chaturdashi", "name": "Aghora Caturdaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1983, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-09-11T21:51:42+07:00", "utc": "2091-09-11T14:51:42Z", "ms": 3840360701522.34 }, "end": { "local": "2091-09-12T19:27:51+07:00", "utc": "2091-09-12T12:27:51Z", "ms": 3840438470527.6357 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-11T21:51:42+07:00", "utc": "2091-09-11T14:51:42Z", "ms": 3840360701522.34 }, "end": { "local": "2091-09-12T19:27:51+07:00", "utc": "2091-09-12T12:27:51Z", "ms": 3840438470527.6357 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-09-11", "window": { "start": { "local": "2091-09-11T18:26:28+07:00", "utc": "2091-09-11T11:26:28Z", "ms": 3840348387848.3438 }, "end": { "local": "2091-09-11T20:01:19+07:00", "utc": "2091-09-11T13:01:19Z", "ms": 3840354079165.1636 } }, "covered_min": 0, "window_min": 95, "qualifies": false }, { "local_date": "2091-09-12", "window": { "start": { "local": "2091-09-12T18:26:01+07:00", "utc": "2091-09-12T11:26:01Z", "ms": 3840434760758.924 }, "end": { "local": "2091-09-12T20:00:54+07:00", "utc": "2091-09-12T13:00:54Z", "ms": 3840440453629.6196 } }, "covered_min": 62, "window_min": 95, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 21:52 on Tue 11 Sep to 19:28 on Wed 12 Sep.", "fact": "2091-09-11T14:51:42Z → 2091-09-12T12:27:51Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:26–20:01 on the 11th, 18:26–20:01 on the 12th.", "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 95 minutes on the 11th and 62 of 95 on the 12th.", "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 1983 s" }, { "step": "ruling", "text": "Aghora Caturdaśī, Medan, 2091: Wednesday 12 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": "2091-09-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-12", "confidence": "determinate" } ], "quote": "In Medan, Aghora Caturdaśī 2091 falls on Wednesday 12 September. Caturdaśī runs from 21:52 on Tue 11 Sep to 19:28 on Wed 12 Sep and covers 62 of 95 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/rudra-vrata", "festival": "rudra-vrata", "name": "Rudra Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2422, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "2091-09-13T16:36:14+07:00", "utc": "2091-09-13T09:36:14Z", "ms": 3840514574010.2197 }, "end": { "local": "2091-09-14T13:25:36+07:00", "utc": "2091-09-14T06:25:36Z", "ms": 3840589536386.1157 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-13T16:36:14+07:00", "utc": "2091-09-13T09:36:14Z", "ms": 3840514574010.2197 }, "end": { "local": "2091-09-14T13:25:36+07:00", "utc": "2091-09-14T06:25:36Z", "ms": 3840589536386.1157 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-13", "window": { "start": { "local": "2091-09-13T11:57:35+07:00", "utc": "2091-09-13T04:57:35Z", "ms": 3840497855435.877 }, "end": { "local": "2091-09-13T12:45:35+07:00", "utc": "2091-09-13T05:45:35Z", "ms": 3840500735435.877 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-09-14", "window": { "start": { "local": "2091-09-14T11:57:14+07:00", "utc": "2091-09-14T04:57:14Z", "ms": 3840584234058.5 }, "end": { "local": "2091-09-14T12:45:14+07:00", "utc": "2091-09-14T05:45:14Z", "ms": 3840587114058.5 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 16:36 on Thu 13 Sep to 13:26 on Fri 14 Sep.", "fact": "2091-09-13T09:36:14Z → 2091-09-14T06:25:36Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 13th, 11:57–12:45 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 2422 s" }, { "step": "ruling", "text": "Rudra Vrata, Medan, 2091: Friday 14 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": "2091-09-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-14", "confidence": "determinate" } ], "quote": "In Medan, Rudra Vrata 2091 falls on Friday 14 September. Pratipadā runs from 16:36 on Thu 13 Sep to 13:26 on Fri 14 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/haritalika-vrata", "festival": "haritalika-vrata", "name": "Haritālikā Vrata", "everyday": "Hartalika Teej", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6702, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "2091-09-15T10:05:11+07:00", "utc": "2091-09-15T03:05:11Z", "ms": 3840663910830.6074 }, "end": { "local": "2091-09-16T06:44:13+07:00", "utc": "2091-09-15T23:44:13Z", "ms": 3840738253362.8433 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-15T10:05:11+07:00", "utc": "2091-09-15T03:05:11Z", "ms": 3840663910830.6074 }, "end": { "local": "2091-09-16T06:44:13+07:00", "utc": "2091-09-15T23:44:13Z", "ms": 3840738253362.8433 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-15", "window": { "start": { "local": "2091-09-15T11:56:53+07:00", "utc": "2091-09-15T04:56:53Z", "ms": 3840670612624.173 }, "end": { "local": "2091-09-15T12:44:53+07:00", "utc": "2091-09-15T05:44:53Z", "ms": 3840673492624.173 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-09-16", "window": { "start": { "local": "2091-09-16T11:56:31+07:00", "utc": "2091-09-16T04:56:31Z", "ms": 3840756991147.8384 }, "end": { "local": "2091-09-16T12:44:31+07:00", "utc": "2091-09-16T05:44:31Z", "ms": 3840759871147.8384 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 10:05 on Sat 15 Sep to 06:44 on Sun 16 Sep.", "fact": "2091-09-15T03:05:11Z → 2091-09-15T23:44:13Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 15th, 11:57–12:45 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 48 of 48 minutes on the 15th and 0 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 6702 s" }, { "step": "ruling", "text": "Haritālikā Vrata, Medan, 2091: Saturday 15 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": "2091-09-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-15", "confidence": "determinate" } ], "quote": "In Medan, Haritālikā Vrata (Hartalika Teej) 2091 falls on Saturday 15 September. Tṛtīyā runs from 10:05 on Sat 15 Sep to 06:44 on Sun 16 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ganesha-chaturthi", "festival": "ganesha-chaturthi", "name": "Gaṇeśa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18738, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-09-16T06:44:13+07:00", "utc": "2091-09-15T23:44:13Z", "ms": 3840738253362.8433 }, "end": { "local": "2091-09-17T03:31:40+07:00", "utc": "2091-09-16T20:31:40Z", "ms": 3840813099903.4336 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-16T06:44:13+07:00", "utc": "2091-09-15T23:44:13Z", "ms": 3840738253362.8433 }, "end": { "local": "2091-09-17T03:31:40+07:00", "utc": "2091-09-16T20:31:40Z", "ms": 3840813099903.4336 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-16", "window": { "start": { "local": "2091-09-16T11:56:31+07:00", "utc": "2091-09-16T04:56:31Z", "ms": 3840756991147.8384 }, "end": { "local": "2091-09-16T12:44:31+07:00", "utc": "2091-09-16T05:44:31Z", "ms": 3840759871147.8384 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-09-17", "window": { "start": { "local": "2091-09-17T11:56:10+07:00", "utc": "2091-09-17T04:56:10Z", "ms": 3840843369645.2334 }, "end": { "local": "2091-09-17T12:44:10+07:00", "utc": "2091-09-17T05:44:10Z", "ms": 3840846249645.2334 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 06:44 on Sun 16 Sep to 03:32 on Mon 17 Sep.", "fact": "2091-09-15T23:44:13Z → 2091-09-16T20:31:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 16th, 11:56–12:44 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 48 of 48 minutes on the 16th and 0 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 18738 s" }, { "step": "ruling", "text": "Gaṇeśa Caturthī, Medan, 2091: Sunday 16 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": "2091-09-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-16", "confidence": "determinate" } ], "quote": "In Medan, Gaṇeśa Caturthī 2091 falls on Sunday 16 September. Caturthī runs from 06:44 on Sun 16 Sep to 03:32 on Mon 17 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/rishi-panchami", "festival": "rishi-panchami", "name": "Ṛṣi Pañcamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30270, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-09-17T03:31:40+07:00", "utc": "2091-09-16T20:31:40Z", "ms": 3840813099903.4336 }, "end": { "local": "2091-09-18T00:35:44+07:00", "utc": "2091-09-17T17:35:44Z", "ms": 3840888943885.6753 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-17T03:31:40+07:00", "utc": "2091-09-16T20:31:40Z", "ms": 3840813099903.4336 }, "end": { "local": "2091-09-18T00:35:44+07:00", "utc": "2091-09-17T17:35:44Z", "ms": 3840888943885.6753 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-17", "window": { "start": { "local": "2091-09-17T11:56:10+07:00", "utc": "2091-09-17T04:56:10Z", "ms": 3840843369645.2334 }, "end": { "local": "2091-09-17T12:44:10+07:00", "utc": "2091-09-17T05:44:10Z", "ms": 3840846249645.2334 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-09-18", "window": { "start": { "local": "2091-09-18T11:55:48+07:00", "utc": "2091-09-18T04:55:48Z", "ms": 3840929748133.208 }, "end": { "local": "2091-09-18T12:43:48+07:00", "utc": "2091-09-18T05:43:48Z", "ms": 3840932628133.208 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 03:32 on Mon 17 Sep to 00:36 on Tue 18 Sep.", "fact": "2091-09-16T20:31:40Z → 2091-09-17T17:35:44Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 17th, 11:56–12:44 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 30270 s" }, { "step": "ruling", "text": "Ṛṣi Pañcamī, Medan, 2091: Monday 17 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": "2091-09-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-17", "confidence": "determinate" } ], "quote": "In Medan, Ṛṣi Pañcamī 2091 falls on Monday 17 September. Pañcamī runs from 03:32 on Mon 17 Sep to 00:36 on Tue 18 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/surya-shashthi-bhadrapada", "festival": "surya-shashthi-bhadrapada", "name": "Sūrya Ṣaṣṭhī (Bhādrapada)", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33585, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-09-18T00:35:44+07:00", "utc": "2091-09-17T17:35:44Z", "ms": 3840888943885.6753 }, "end": { "local": "2091-09-18T22:03:33+07:00", "utc": "2091-09-18T15:03:33Z", "ms": 3840966213252.1855 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-18T00:35:44+07:00", "utc": "2091-09-17T17:35:44Z", "ms": 3840888943885.6753 }, "end": { "local": "2091-09-18T22:03:33+07:00", "utc": "2091-09-18T15:03:33Z", "ms": 3840966213252.1855 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-17", "window": { "start": { "local": "2091-09-17T11:56:10+07:00", "utc": "2091-09-17T04:56:10Z", "ms": 3840843369645.2334 }, "end": { "local": "2091-09-17T12:44:10+07:00", "utc": "2091-09-17T05:44:10Z", "ms": 3840846249645.2334 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-09-18", "window": { "start": { "local": "2091-09-18T11:55:48+07:00", "utc": "2091-09-18T04:55:48Z", "ms": 3840929748133.208 }, "end": { "local": "2091-09-18T12:43:48+07:00", "utc": "2091-09-18T05:43:48Z", "ms": 3840932628133.208 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 00:36 on Tue 18 Sep to 22:04 on Tue 18 Sep.", "fact": "2091-09-17T17:35:44Z → 2091-09-18T15:03:33Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 17th, 11:56–12:44 on the 18th.", "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 17th and 48 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33585 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī (Bhādrapada), Medan, 2091: Tuesday 18 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": "2091-09-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-18", "confidence": "determinate" } ], "quote": "In Medan, Sūrya Ṣaṣṭhī (Bhādrapada) 2091 falls on Tuesday 18 September. Ṣaṣṭhī runs from 00:36 on Tue 18 Sep to 22:04 on Tue 18 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/muktabharana-vrata", "festival": "muktabharana-vrata", "name": "Muktābharaṇa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26241, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "2091-09-18T22:03:33+07:00", "utc": "2091-09-18T15:03:33Z", "ms": 3840966213252.1855 }, "end": { "local": "2091-09-19T20:00:48+07:00", "utc": "2091-09-19T13:00:48Z", "ms": 3841045247665.4824 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-18T22:03:33+07:00", "utc": "2091-09-18T15:03:33Z", "ms": 3840966213252.1855 }, "end": { "local": "2091-09-19T20:00:48+07:00", "utc": "2091-09-19T13:00:48Z", "ms": 3841045247665.4824 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-18", "window": { "start": { "local": "2091-09-18T11:55:48+07:00", "utc": "2091-09-18T04:55:48Z", "ms": 3840929748133.208 }, "end": { "local": "2091-09-18T12:43:48+07:00", "utc": "2091-09-18T05:43:48Z", "ms": 3840932628133.208 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-09-19", "window": { "start": { "local": "2091-09-19T11:55:27+07:00", "utc": "2091-09-19T04:55:27Z", "ms": 3841016126629.882 }, "end": { "local": "2091-09-19T12:43:27+07:00", "utc": "2091-09-19T05:43:27Z", "ms": 3841019006629.882 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 22:04 on Tue 18 Sep to 20:01 on Wed 19 Sep.", "fact": "2091-09-18T15:03:33Z → 2091-09-19T13:00:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 18th, 11:55–12:43 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 48 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: purvaviddha → only-day · margin 26241 s" }, { "step": "ruling", "text": "Muktābharaṇa Vrata, Medan, 2091: Wednesday 19 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": "2091-09-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-19", "confidence": "determinate" } ], "quote": "In Medan, Muktābharaṇa Vrata 2091 falls on Wednesday 19 September. Saptamī runs from 22:04 on Tue 18 Sep to 20:01 on Wed 19 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/radhashtami", "festival": "radhashtami", "name": "Rādhāṣṭamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20894, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-09-19T20:00:48+07:00", "utc": "2091-09-19T13:00:48Z", "ms": 3841045247665.4824 }, "end": { "local": "2091-09-20T18:31:19+07:00", "utc": "2091-09-20T11:31:19Z", "ms": 3841126279073.777 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-19T20:00:48+07:00", "utc": "2091-09-19T13:00:48Z", "ms": 3841045247665.4824 }, "end": { "local": "2091-09-20T18:31:19+07:00", "utc": "2091-09-20T11:31:19Z", "ms": 3841126279073.777 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-19", "window": { "start": { "local": "2091-09-19T11:55:27+07:00", "utc": "2091-09-19T04:55:27Z", "ms": 3841016126629.882 }, "end": { "local": "2091-09-19T12:43:27+07:00", "utc": "2091-09-19T05:43:27Z", "ms": 3841019006629.882 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-09-20", "window": { "start": { "local": "2091-09-20T11:55:05+07:00", "utc": "2091-09-20T04:55:05Z", "ms": 3841102505154.64 }, "end": { "local": "2091-09-20T12:43:05+07:00", "utc": "2091-09-20T05:43:05Z", "ms": 3841105385154.64 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 20:01 on Wed 19 Sep to 18:31 on Thu 20 Sep.", "fact": "2091-09-19T13:00:48Z → 2091-09-20T11:31:19Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 19th, 11:55–12:43 on the 20th.", "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 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: unstated → only-day · margin 20894 s" }, { "step": "ruling", "text": "Rādhāṣṭamī, Medan, 2091: Thursday 20 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": "2091-09-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-20", "confidence": "determinate" } ], "quote": "In Medan, Rādhāṣṭamī 2091 falls on Thursday 20 September. Aṣṭamī runs from 20:01 on Wed 19 Sep to 18:31 on Thu 20 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-09-23", "festival": "ekadashi", "name": "Parivartanī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 39751, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-09-22T17:17:48+07:00", "utc": "2091-09-22T10:17:48Z", "ms": 3841294668136.298 }, "end": { "local": "2091-09-23T17:31:58+07:00", "utc": "2091-09-23T10:31:58Z", "ms": 3841381918193.1504 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-22T17:17:48+07:00", "utc": "2091-09-22T10:17:48Z", "ms": 3841294668136.298 }, "end": { "local": "2091-09-23T17:31:58+07:00", "utc": "2091-09-23T10:31:58Z", "ms": 3841381918193.1504 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-09-22", "window": { "start": { "local": "2091-09-22T06:15:17+07:00", "utc": "2091-09-21T23:15:17Z", "ms": 3841254916903.061 }, "end": { "local": "2091-09-22T06:15:17+07:00", "utc": "2091-09-21T23:15:17Z", "ms": 3841254916903.061 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-09-23", "window": { "start": { "local": "2091-09-23T06:15:01+07:00", "utc": "2091-09-22T23:15:01Z", "ms": 3841341301452.3506 }, "end": { "local": "2091-09-23T06:15:01+07:00", "utc": "2091-09-22T23:15:01Z", "ms": 3841341301452.3506 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 17:18 on Sat 22 Sep to 17:32 on Sun 23 Sep.", "fact": "2091-09-22T10:17:48Z → 2091-09-23T10:31:58Z" }, { "step": "kaala", "text": "Sunrise is at 06:15 on the 22nd and 06:15 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 on the 23rd.", "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 39751 s" }, { "step": "ruling", "text": "Parivartanī Ekādaśī, Medan, 2091: Sunday 23 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": "2091-09-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-23", "confidence": "determinate" } ], "quote": "In Medan, Parivartanī Ekādaśī 2091 falls on Sunday 23 September. Ekādaśī runs from 17:18 on Sat 22 Sep to 17:32 on Sun 23 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-09-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/vamana-jayanti", "festival": "vamana-jayanti", "name": "Vāmana Jayantī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17397, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-09-23T17:31:58+07:00", "utc": "2091-09-23T10:31:58Z", "ms": 3841381918193.1504 }, "end": { "local": "2091-09-24T18:16:37+07:00", "utc": "2091-09-24T11:16:37Z", "ms": 3841470996680.5996 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-23T17:31:58+07:00", "utc": "2091-09-23T10:31:58Z", "ms": 3841381918193.1504 }, "end": { "local": "2091-09-24T18:16:37+07:00", "utc": "2091-09-24T11:16:37Z", "ms": 3841470996680.5996 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-09-23", "window": { "start": { "local": "2091-09-23T11:54:01+07:00", "utc": "2091-09-23T04:54:01Z", "ms": 3841361641107.468 }, "end": { "local": "2091-09-23T12:42:01+07:00", "utc": "2091-09-23T05:42:01Z", "ms": 3841364521107.468 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-09-24", "window": { "start": { "local": "2091-09-24T11:53:40+07:00", "utc": "2091-09-24T04:53:40Z", "ms": 3841448019958.7285 }, "end": { "local": "2091-09-24T12:41:40+07:00", "utc": "2091-09-24T05:41:40Z", "ms": 3841450899958.7285 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 17:32 on Sun 23 Sep to 18:17 on Mon 24 Sep.", "fact": "2091-09-23T10:31:58Z → 2091-09-24T11:16:37Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 23rd, 11:54–12:42 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 0 of 48 minutes on the 23rd and 48 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 17397 s" }, { "step": "ruling", "text": "Vāmana Jayantī, Medan, 2091: Monday 24 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": "2091-09-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-24", "confidence": "determinate" } ], "quote": "In Medan, Vāmana Jayantī 2091 falls on Monday 24 September. Dvādaśī runs from 17:32 on Sun 23 Sep to 18:17 on Mon 24 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pradosha-vrata?on=2091-09-24", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-24", "confidence": "boundary", "boundary_reasons": [ "margin", "tie-break-unstated" ], "boundary_margin_s": 237, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-09-24T18:16:37+07:00", "utc": "2091-09-24T11:16:37Z", "ms": 3841470996680.5996 }, "end": { "local": "2091-09-25T19:28:13+07:00", "utc": "2091-09-25T12:28:13Z", "ms": 3841561692937.5557 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-24T18:16:37+07:00", "utc": "2091-09-24T11:16:37Z", "ms": 3841470996680.5996 }, "end": { "local": "2091-09-25T19:28:13+07:00", "utc": "2091-09-25T12:28:13Z", "ms": 3841561692937.5557 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-09-24", "window": { "start": { "local": "2091-09-24T18:20:34+07:00", "utc": "2091-09-24T11:20:34Z", "ms": 3841471233812.565 }, "end": { "local": "2091-09-24T19:55:45+07:00", "utc": "2091-09-24T12:55:45Z", "ms": 3841476945421.9756 } }, "covered_min": 95, "window_min": 95, "qualifies": true }, { "local_date": "2091-09-25", "window": { "start": { "local": "2091-09-25T18:20:07+07:00", "utc": "2091-09-25T11:20:07Z", "ms": 3841557607014.1836 }, "end": { "local": "2091-09-25T19:55:20+07:00", "utc": "2091-09-25T12:55:20Z", "ms": 3841563320186.94 } }, "covered_min": 68, "window_min": 95, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 18:17 on Mon 24 Sep to 19:28 on Tue 25 Sep.", "fact": "2091-09-24T11:16:37Z → 2091-09-25T12:28:13Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:21–19:56 on the 24th, 18:20–19:55 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 95 of 95 minutes on the 24th and 68 of 95 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 237 s < 300 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Monday 24 September.", "fact": "confidence: boundary (margin, tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-09-24", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-24", "confidence": "boundary" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Monday 24 September. Trayodaśī runs from 18:17 on Mon 24 Sep to 19:28 on Tue 25 Sep and covers all of pradoṣa that evening. It also reaches the next evening for 68 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 3 min 57 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-09-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ananta-chaturdashi", "festival": "ananta-chaturdashi", "name": "Ananta Caturdaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-09-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33054, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-09-25T19:28:13+07:00", "utc": "2091-09-25T12:28:13Z", "ms": 3841561692937.5557 }, "end": { "local": "2091-09-26T21:03:07+07:00", "utc": "2091-09-26T14:03:07Z", "ms": 3841653786965.3506 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "2091-09-25T19:28:13+07:00", "utc": "2091-09-25T12:28:13Z", "ms": 3841561692937.5557 }, "end": { "local": "2091-09-26T21:03:07+07:00", "utc": "2091-09-26T14:03:07Z", "ms": 3841653786965.3506 } }, "kaala": "udaya-3", "days": [ { "local_date": "2091-09-26", "window": { "start": { "local": "2091-09-26T06:14:16+07:00", "utc": "2091-09-25T23:14:16Z", "ms": 3841600455809.856 }, "end": { "local": "2091-09-26T08:39:21+07:00", "utc": "2091-09-26T01:39:21Z", "ms": 3841609160726.27 } }, "covered_min": 145, "window_min": 145, "qualifies": true }, { "local_date": "2091-09-27", "window": { "start": { "local": "2091-09-27T06:14:01+07:00", "utc": "2091-09-26T23:14:01Z", "ms": 3841686840907.962 }, "end": { "local": "2091-09-27T08:39:04+07:00", "utc": "2091-09-27T01:39:04Z", "ms": 3841695543520.4434 } }, "covered_min": 0, "window_min": 145, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 19:28 on Tue 25 Sep to 21:03 on Wed 26 Sep.", "fact": "2091-09-25T12:28:13Z → 2091-09-26T14:03:07Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:14–08:39 on the 26th, 06:14–08:39 on the 27th.", "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 145 of 145 minutes on the 26th and 0 of 145 on the 27th.", "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 33054 s" }, { "step": "ruling", "text": "Ananta Caturdaśī, Medan, 2091: Wednesday 26 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": "2091-09-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-09-26", "confidence": "determinate" } ], "quote": "In Medan, Ananta Caturdaśī 2091 falls on Wednesday 26 September. Caturdaśī runs from 19:28 on Tue 25 Sep to 21:03 on Wed 26 Sep and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-10-01", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34752, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-10-01T05:59:21+07:00", "utc": "2091-09-30T22:59:21Z", "ms": 3842031560531.2896 }, "end": { "local": "2091-10-02T08:27:54+07:00", "utc": "2091-10-02T01:27:54Z", "ms": 3842126873959.329 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-01T05:59:21+07:00", "utc": "2091-09-30T22:59:21Z", "ms": 3842031560531.2896 }, "end": { "local": "2091-10-02T08:27:54+07:00", "utc": "2091-10-02T01:27:54Z", "ms": 3842126873959.329 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-09-30", "window": { "start": { "local": "2091-09-30T20:20:08+07:00", "utc": "2091-09-30T13:20:08Z", "ms": 3841996808222.9673 }, "end": { "local": "2091-09-30T20:20:08+07:00", "utc": "2091-09-30T13:20:08Z", "ms": 3841996808222.9673 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-10-01", "window": { "start": { "local": "2091-10-01T21:03:16+07:00", "utc": "2091-10-01T14:03:16Z", "ms": 3842085795889.6494 }, "end": { "local": "2091-10-01T21:03:16+07:00", "utc": "2091-10-01T14:03:16Z", "ms": 3842085795889.6494 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:59 on Mon 1 Oct to 08:28 on Tue 2 Oct.", "fact": "2091-09-30T22:59:21Z → 2091-10-02T01:27:54Z" }, { "step": "kaala", "text": "Moonrise is at 20:20 on the 30th and 21:03 on the 1st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 30th 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 34752 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Monday 1 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": "2091-10-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-01", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Monday 1 October. Caturthī runs from 05:59 on Mon 1 Oct to 08:28 on Tue 2 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-10-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/chandra-shashthi", "festival": "chandra-shashthi", "name": "Candra Ṣaṣṭhī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37982, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-10-03T10:47:45+07:00", "utc": "2091-10-03T03:47:45Z", "ms": 3842221665294.244 }, "end": { "local": "2091-10-04T12:49:11+07:00", "utc": "2091-10-04T05:49:11Z", "ms": 3842315350505.4194 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-03T10:47:45+07:00", "utc": "2091-10-03T03:47:45Z", "ms": 3842221665294.244 }, "end": { "local": "2091-10-04T12:49:11+07:00", "utc": "2091-10-04T05:49:11Z", "ms": 3842315350505.4194 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-10-03", "window": { "start": { "local": "2091-10-03T22:34:05+07:00", "utc": "2091-10-03T15:34:05Z", "ms": 3842264044936.562 }, "end": { "local": "2091-10-03T22:34:05+07:00", "utc": "2091-10-03T15:34:05Z", "ms": 3842264044936.562 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-10-04", "window": { "start": { "local": "2091-10-04T23:22:12+07:00", "utc": "2091-10-04T16:22:12Z", "ms": 3842353332052.341 }, "end": { "local": "2091-10-04T23:22:12+07:00", "utc": "2091-10-04T16:22:12Z", "ms": 3842353332052.341 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 10:48 on Wed 3 Oct to 12:49 on Thu 4 Oct.", "fact": "2091-10-03T03:47:45Z → 2091-10-04T05:49:11Z" }, { "step": "kaala", "text": "Moonrise is at 22:34 on the 3rd and 23:22 on the 4th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Ṣaṣṭhī must be current at moonrise. It is on the 3rd and is not on the 4th.", "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 37982 s" }, { "step": "ruling", "text": "Candra Ṣaṣṭhī, Medan, 2091: Wednesday 3 October.", "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": "2091-10-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-03", "confidence": "determinate" } ], "quote": "In Medan, Candra Ṣaṣṭhī 2091 falls on Wednesday 3 October. Ṣaṣṭhī runs from 10:48 on Wed 3 Oct to 12:49 on Thu 4 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/jitashtami", "festival": "jitashtami", "name": "Jitāṣṭamī", "everyday": "Jitiya", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10687, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-10-05T14:22:05+07:00", "utc": "2091-10-05T07:22:05Z", "ms": 3842407324836.1772 }, "end": { "local": "2091-10-06T15:17:22+07:00", "utc": "2091-10-06T08:17:22Z", "ms": 3842497041817.826 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-05T14:22:05+07:00", "utc": "2091-10-05T07:22:05Z", "ms": 3842407324836.1772 }, "end": { "local": "2091-10-06T15:17:22+07:00", "utc": "2091-10-06T08:17:22Z", "ms": 3842497041817.826 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-10-05", "window": { "start": { "local": "2091-10-05T18:15:53+07:00", "utc": "2091-10-05T11:15:53Z", "ms": 3842421352725.652 }, "end": { "local": "2091-10-05T19:51:21+07:00", "utc": "2091-10-05T12:51:21Z", "ms": 3842427081459.5283 } }, "covered_min": 95, "window_min": 95, "qualifies": true }, { "local_date": "2091-10-06", "window": { "start": { "local": "2091-10-06T18:15:29+07:00", "utc": "2091-10-06T11:15:29Z", "ms": 3842507729186.0957 }, "end": { "local": "2091-10-06T19:50:59+07:00", "utc": "2091-10-06T12:50:59Z", "ms": 3842513459463.366 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 14:22 on Fri 5 Oct to 15:17 on Sat 6 Oct.", "fact": "2091-10-05T07:22:05Z → 2091-10-06T08:17:22Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:16–19:51 on the 5th, 18:15–19:51 on the 6th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during pradoṣa. It covers 95 of 95 minutes on the 5th and 0 of 96 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 10687 s" }, { "step": "ruling", "text": "Jitāṣṭamī, Medan, 2091: Friday 5 October.", "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": "2091-10-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-05", "confidence": "determinate" } ], "quote": "In Medan, Jitāṣṭamī (Jitiya) 2091 falls on Friday 5 October. Aṣṭamī runs from 14:22 on Fri 5 Oct to 15:17 on Sat 6 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/mahalakshmi-vrata-samapana", "festival": "mahalakshmi-vrata-samapana", "name": "Mahālakṣmī Vrata Samāpana", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35175, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-10-05T14:22:05+07:00", "utc": "2091-10-05T07:22:05Z", "ms": 3842407324836.1772 }, "end": { "local": "2091-10-06T15:17:22+07:00", "utc": "2091-10-06T08:17:22Z", "ms": 3842497041817.826 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-05T14:22:05+07:00", "utc": "2091-10-05T07:22:05Z", "ms": 3842407324836.1772 }, "end": { "local": "2091-10-06T15:17:22+07:00", "utc": "2091-10-06T08:17:22Z", "ms": 3842497041817.826 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-10-05", "window": { "start": { "local": "2091-10-06T00:12:07+07:00", "utc": "2091-10-05T17:12:07Z", "ms": 3842442726994.241 }, "end": { "local": "2091-10-06T00:12:07+07:00", "utc": "2091-10-05T17:12:07Z", "ms": 3842442726994.241 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-10-06", "window": { "start": { "local": "2091-10-07T01:03:36+07:00", "utc": "2091-10-06T18:03:36Z", "ms": 3842532216408.694 }, "end": { "local": "2091-10-07T01:03:36+07:00", "utc": "2091-10-06T18:03:36Z", "ms": 3842532216408.694 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 14:22 on Fri 5 Oct to 15:17 on Sat 6 Oct.", "fact": "2091-10-05T07:22:05Z → 2091-10-06T08:17:22Z" }, { "step": "kaala", "text": "Moonrise is at 00:12 on the 5th and 01:04 on the 6th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is on the 5th and is not on the 6th.", "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 35175 s" }, { "step": "ruling", "text": "Mahālakṣmī Vrata Samāpana, Medan, 2091: Friday 5 October.", "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": "2091-10-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-05", "confidence": "determinate" } ], "quote": "In Medan, Mahālakṣmī Vrata Samāpana 2091 falls on Friday 5 October. Aṣṭamī runs from 14:22 on Fri 5 Oct to 15:17 on Sat 6 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-10-09", "festival": "ekadashi", "name": "Indirā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26063, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-10-08T14:51:01+07:00", "utc": "2091-10-08T07:51:01Z", "ms": 3842668260852.305 }, "end": { "local": "2091-10-09T13:25:47+07:00", "utc": "2091-10-09T06:25:47Z", "ms": 3842749547068.63 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-08T14:51:01+07:00", "utc": "2091-10-08T07:51:01Z", "ms": 3842668260852.305 }, "end": { "local": "2091-10-09T13:25:47+07:00", "utc": "2091-10-09T06:25:47Z", "ms": 3842749547068.63 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-10-08", "window": { "start": { "local": "2091-10-08T06:11:35+07:00", "utc": "2091-10-07T23:11:35Z", "ms": 3842637094708.494 }, "end": { "local": "2091-10-08T06:11:35+07:00", "utc": "2091-10-07T23:11:35Z", "ms": 3842637094708.494 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-10-09", "window": { "start": { "local": "2091-10-09T06:11:24+07:00", "utc": "2091-10-08T23:11:24Z", "ms": 3842723483576.151 }, "end": { "local": "2091-10-09T06:11:24+07:00", "utc": "2091-10-08T23:11:24Z", "ms": 3842723483576.151 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 14:51 on Mon 8 Oct to 13:26 on Tue 9 Oct.", "fact": "2091-10-08T07:51:01Z → 2091-10-09T06:25:47Z" }, { "step": "kaala", "text": "Sunrise is at 06:12 on the 8th and 06:11 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 26063 s" }, { "step": "ruling", "text": "Indirā Ekādaśī, Medan, 2091: Tuesday 9 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": "2091-10-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-09", "confidence": "determinate" } ], "quote": "In Medan, Indirā Ekādaśī 2091 falls on Tuesday 9 October. Ekādaśī runs from 14:51 on Mon 8 Oct to 13:26 on Tue 9 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-10-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-10-10", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25086, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-10-10T11:15:54+07:00", "utc": "2091-10-10T04:15:54Z", "ms": 3842828153924.4604 }, "end": { "local": "2091-10-11T08:27:34+07:00", "utc": "2091-10-11T01:27:34Z", "ms": 3842904454299.45 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-10T11:15:54+07:00", "utc": "2091-10-10T04:15:54Z", "ms": 3842828153924.4604 }, "end": { "local": "2091-10-11T08:27:34+07:00", "utc": "2091-10-11T01:27:34Z", "ms": 3842904454299.45 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-10-10", "window": { "start": { "local": "2091-10-10T18:14:00+07:00", "utc": "2091-10-10T11:14:00Z", "ms": 3842853239553.763 }, "end": { "local": "2091-10-10T19:49:36+07:00", "utc": "2091-10-10T12:49:36Z", "ms": 3842858975966.759 } }, "covered_min": 96, "window_min": 96, "qualifies": true }, { "local_date": "2091-10-11", "window": { "start": { "local": "2091-10-11T18:13:38+07:00", "utc": "2091-10-11T11:13:38Z", "ms": 3842939618370.5527 }, "end": { "local": "2091-10-11T19:49:16+07:00", "utc": "2091-10-11T12:49:16Z", "ms": 3842945356306.2256 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:16 on Wed 10 Oct to 08:28 on Thu 11 Oct.", "fact": "2091-10-10T04:15:54Z → 2091-10-11T01:27:34Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:14–19:50 on the 10th, 18:14–19:49 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 96 of 96 minutes on the 10th and 0 of 96 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 25086 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Wednesday 10 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": "2091-10-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-10", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Wednesday 10 October. Trayodaśī runs from 11:16 on Wed 10 Oct to 08:28 on Thu 11 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-10-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-10-11", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16373, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-10-11T08:27:34+07:00", "utc": "2091-10-11T01:27:34Z", "ms": 3842904454299.45 }, "end": { "local": "2091-10-12T05:09:09+07:00", "utc": "2091-10-11T22:09:09Z", "ms": 3842978949120.0137 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-11T08:27:34+07:00", "utc": "2091-10-11T01:27:34Z", "ms": 3842904454299.45 }, "end": { "local": "2091-10-12T05:09:09+07:00", "utc": "2091-10-11T22:09:09Z", "ms": 3842978949120.0137 } }, "kaala": "nishita", "days": [ { "local_date": "2091-10-10", "window": { "start": { "local": "2091-10-10T23:48:31+07:00", "utc": "2091-10-10T16:48:31Z", "ms": 3842873311102.496 }, "end": { "local": "2091-10-11T00:36:31+07:00", "utc": "2091-10-10T17:36:31Z", "ms": 3842876191102.496 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-10-11", "window": { "start": { "local": "2091-10-11T23:48:16+07:00", "utc": "2091-10-11T16:48:16Z", "ms": 3842959695629.3267 }, "end": { "local": "2091-10-12T00:36:16+07:00", "utc": "2091-10-11T17:36:16Z", "ms": 3842962575629.3267 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 08:28 on Thu 11 Oct to 05:09 on Fri 12 Oct.", "fact": "2091-10-11T01:27:34Z → 2091-10-11T22:09:09Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:49–00:37 on the 10th, 23:48–00:36 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 16373 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Thursday 11 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-10-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-11", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Thursday 11 October. Caturdaśī runs from 08:28 on Thu 11 Oct to 05:09 on Fri 12 Oct and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-10-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/mahalaya-amavasya", "festival": "mahalaya-amavasya", "name": "Mahālaya Amāvāsyā", "everyday": "Sarvapitṛ Amāvāsyā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29711, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "2091-10-12T05:09:09+07:00", "utc": "2091-10-11T22:09:09Z", "ms": 3842978949120.0137 }, "end": { "local": "2091-10-13T01:30:27+07:00", "utc": "2091-10-12T18:30:27Z", "ms": 3843052226673.9663 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-12T05:09:09+07:00", "utc": "2091-10-11T22:09:09Z", "ms": 3842978949120.0137 }, "end": { "local": "2091-10-13T01:30:27+07:00", "utc": "2091-10-12T18:30:27Z", "ms": 3843052226673.9663 } }, "kaala": "aparahna", "days": [ { "local_date": "2091-10-12", "window": { "start": { "local": "2091-10-12T13:24:20+07:00", "utc": "2091-10-12T06:24:20Z", "ms": 3843008659781.505 }, "end": { "local": "2091-10-12T15:48:49+07:00", "utc": "2091-10-12T08:48:49Z", "ms": 3843017328745.973 } }, "covered_min": 144, "window_min": 144, "qualifies": true }, { "local_date": "2091-10-13", "window": { "start": { "local": "2091-10-13T13:24:04+07:00", "utc": "2091-10-13T06:24:04Z", "ms": 3843095043996.337 }, "end": { "local": "2091-10-13T15:48:31+07:00", "utc": "2091-10-13T08:48:31Z", "ms": 3843103710792.2007 } }, "covered_min": 0, "window_min": 144, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 05:09 on Fri 12 Oct to 01:30 on Sat 13 Oct.", "fact": "2091-10-11T22:09:09Z → 2091-10-12T18:30:27Z" }, { "step": "kaala", "text": "Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:24–15:49 on the 12th, 13:24–15:49 on the 13th.", "fact": "aparahna: day-muhurta-10-12 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during aparāhṇa. It covers 144 of 144 minutes on the 12th and 0 of 144 on the 13th.", "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 29711 s" }, { "step": "ruling", "text": "Mahālaya Amāvāsyā, Medan, 2091: Friday 12 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": "2091-10-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-12", "confidence": "determinate" } ], "quote": "In Medan, Mahālaya Amāvāsyā 2091 falls on Friday 12 October. Amāvasyā runs from 05:09 on Fri 12 Oct to 01:30 on Sat 13 Oct and covers all of aparāhṇa that afternoon.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/navaratra-arambha", "festival": "navaratra-arambha", "name": "Navarātrārambha", "everyday": "Navratri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32777, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "2091-10-13T01:30:27+07:00", "utc": "2091-10-12T18:30:27Z", "ms": 3843052226673.9663 }, "end": { "local": "2091-10-13T21:42:07+07:00", "utc": "2091-10-13T14:42:07Z", "ms": 3843124927369.575 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-13T01:30:27+07:00", "utc": "2091-10-12T18:30:27Z", "ms": 3843052226673.9663 }, "end": { "local": "2091-10-13T21:42:07+07:00", "utc": "2091-10-13T14:42:07Z", "ms": 3843124927369.575 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-10-12", "window": { "start": { "local": "2091-10-12T11:48:05+07:00", "utc": "2091-10-12T04:48:05Z", "ms": 3843002885299.271 }, "end": { "local": "2091-10-12T12:36:05+07:00", "utc": "2091-10-12T05:36:05Z", "ms": 3843005765299.271 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-10-13", "window": { "start": { "local": "2091-10-13T11:47:51+07:00", "utc": "2091-10-13T04:47:51Z", "ms": 3843089270598.405 }, "end": { "local": "2091-10-13T12:35:51+07:00", "utc": "2091-10-13T05:35:51Z", "ms": 3843092150598.405 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 01:30 on Sat 13 Oct to 21:42 on Sat 13 Oct.", "fact": "2091-10-12T18:30:27Z → 2091-10-13T14:42:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 12th, 11:48–12:36 on the 13th.", "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 12th and 48 of 48 on the 13th.", "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 32777 s" }, { "step": "ruling", "text": "Navarātrārambha, Medan, 2091: Saturday 13 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": "2091-10-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-13", "confidence": "determinate" } ], "quote": "In Medan, Navarātrārambha (Navratri) 2091 falls on Saturday 13 October. Pratipadā runs from 01:30 on Sat 13 Oct to 21:42 on Sat 13 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-10-16", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2293, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-10-15T14:20:43+07:00", "utc": "2091-10-15T07:20:43Z", "ms": 3843271242864.029 }, "end": { "local": "2091-10-16T11:08:57+07:00", "utc": "2091-10-16T04:08:57Z", "ms": 3843346137159.6523 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-15T14:20:43+07:00", "utc": "2091-10-15T07:20:43Z", "ms": 3843271242864.029 }, "end": { "local": "2091-10-16T11:08:57+07:00", "utc": "2091-10-16T04:08:57Z", "ms": 3843346137159.6523 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-10-15", "window": { "start": { "local": "2091-10-15T11:47:23+07:00", "utc": "2091-10-15T04:47:23Z", "ms": 3843262042780.8965 }, "end": { "local": "2091-10-15T12:35:23+07:00", "utc": "2091-10-15T05:35:23Z", "ms": 3843264922780.8965 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-10-16", "window": { "start": { "local": "2091-10-16T11:47:10+07:00", "utc": "2091-10-16T04:47:10Z", "ms": 3843348429690.3125 }, "end": { "local": "2091-10-16T12:35:10+07:00", "utc": "2091-10-16T05:35:10Z", "ms": 3843351309690.3125 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 14:21 on Mon 15 Oct to 11:09 on Tue 16 Oct.", "fact": "2091-10-15T07:20:43Z → 2091-10-16T04:08:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 15th, 11:47–12:35 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 0 of 48 on the 16th.", "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 2293 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Tuesday 16 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": "2091-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-16", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Tuesday 16 October. Caturthī runs from 14:21 on Mon 15 Oct to 11:09 on Tue 16 Oct, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-10-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/durga-saptami", "festival": "durga-saptami", "name": "Durgā Saptamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-18", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 1124, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "2091-10-18T06:28:49+07:00", "utc": "2091-10-17T23:28:49Z", "ms": 3843502129314.067 }, "end": { "local": "2091-10-19T05:12:50+07:00", "utc": "2091-10-18T22:12:50Z", "ms": 3843583969861.768 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-18T06:28:49+07:00", "utc": "2091-10-17T23:28:49Z", "ms": 3843502129314.067 }, "end": { "local": "2091-10-19T05:12:50+07:00", "utc": "2091-10-18T22:12:50Z", "ms": 3843583969861.768 } }, "kaala": "udaya-1", "days": [ { "local_date": "2091-10-18", "window": { "start": { "local": "2091-10-18T06:10:05+07:00", "utc": "2091-10-17T23:10:05Z", "ms": 3843501004886.618 }, "end": { "local": "2091-10-18T06:58:10+07:00", "utc": "2091-10-17T23:58:10Z", "ms": 3843503890263.7944 } }, "covered_min": 29, "window_min": 48, "qualifies": false }, { "local_date": "2091-10-19", "window": { "start": { "local": "2091-10-19T06:09:59+07:00", "utc": "2091-10-18T23:09:59Z", "ms": 3843587398765.7974 }, "end": { "local": "2091-10-19T06:58:03+07:00", "utc": "2091-10-18T23:58:03Z", "ms": 3843590283445.265 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 06:29 on Thu 18 Oct to 05:13 on Fri 19 Oct.", "fact": "2091-10-17T23:28:49Z → 2091-10-18T22:12:50Z" }, { "step": "kaala", "text": "The first muhūrta after sunrise is 1st of 15 day muhūrtas: 06:10–06:58 on the 18th, 06:10–06:58 on the 19th.", "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 29 of 48 minutes on the 18th and 0 of 48 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Neither morning qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 1124 s" }, { "step": "ruling", "text": "Durgā Saptamī, Medan, 2091: Thursday 18 October.", "fact": "confidence: boundary (absent-unstated)" } ], "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": "2091-10-18", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-18", "confidence": "boundary" } ], "quote": "In Medan, Durgā Saptamī 2091 falls on Thursday 18 October. Saptamī runs from 06:29 on Thu 18 Oct to 05:13 on Fri 19 Oct, and reaches the first muhūrta after sunrise on neither day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/mahashtami", "festival": "mahashtami", "name": "Mahāṣṭamī", "everyday": "Durga Ashtami", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23624, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-10-19T05:12:50+07:00", "utc": "2091-10-18T22:12:50Z", "ms": 3843583969861.768 }, "end": { "local": "2091-10-20T04:43:04+07:00", "utc": "2091-10-19T21:43:04Z", "ms": 3843668584383.647 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-19T05:12:50+07:00", "utc": "2091-10-18T22:12:50Z", "ms": 3843583969861.768 }, "end": { "local": "2091-10-20T04:43:04+07:00", "utc": "2091-10-19T21:43:04Z", "ms": 3843668584383.647 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-10-19", "window": { "start": { "local": "2091-10-19T11:46:34+07:00", "utc": "2091-10-19T04:46:34Z", "ms": 3843607593861.8047 }, "end": { "local": "2091-10-19T12:34:34+07:00", "utc": "2091-10-19T05:34:34Z", "ms": 3843610473861.8047 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-10-20", "window": { "start": { "local": "2091-10-20T11:46:23+07:00", "utc": "2091-10-20T04:46:23Z", "ms": 3843693983119.1177 }, "end": { "local": "2091-10-20T12:34:23+07:00", "utc": "2091-10-20T05:34:23Z", "ms": 3843696863119.1177 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 05:13 on Fri 19 Oct to 04:43 on Sat 20 Oct.", "fact": "2091-10-18T22:12:50Z → 2091-10-19T21:43:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 19th, 11:46–12:34 on the 20th.", "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 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 midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 23624 s" }, { "step": "ruling", "text": "Mahāṣṭamī, Medan, 2091: Friday 19 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": "2091-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-19", "confidence": "determinate" } ], "quote": "In Medan, Mahāṣṭamī (Durga Ashtami) 2091 falls on Friday 19 October. Aṣṭamī runs from 05:13 on Fri 19 Oct to 04:43 on Sat 20 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/mahanavami", "festival": "mahanavami", "name": "Mahānavamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24488, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "2091-10-20T04:43:04+07:00", "utc": "2091-10-19T21:43:04Z", "ms": 3843668584383.647 }, "end": { "local": "2091-10-21T04:58:05+07:00", "utc": "2091-10-20T21:58:05Z", "ms": 3843755884885.5664 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-20T04:43:04+07:00", "utc": "2091-10-19T21:43:04Z", "ms": 3843668584383.647 }, "end": { "local": "2091-10-21T04:58:05+07:00", "utc": "2091-10-20T21:58:05Z", "ms": 3843755884885.5664 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-10-20", "window": { "start": { "local": "2091-10-20T11:46:23+07:00", "utc": "2091-10-20T04:46:23Z", "ms": 3843693983119.1177 }, "end": { "local": "2091-10-20T12:34:23+07:00", "utc": "2091-10-20T05:34:23Z", "ms": 3843696863119.1177 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-10-21", "window": { "start": { "local": "2091-10-21T11:46:13+07:00", "utc": "2091-10-21T04:46:13Z", "ms": 3843780373004.3643 }, "end": { "local": "2091-10-21T12:34:13+07:00", "utc": "2091-10-21T05:34:13Z", "ms": 3843783253004.3643 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 04:43 on Sat 20 Oct to 04:58 on Sun 21 Oct.", "fact": "2091-10-19T21:43:04Z → 2091-10-20T21:58:05Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 20th, 11:46–12:34 on the 21st.", "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 20th and 0 of 48 on the 21st.", "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 24488 s" }, { "step": "ruling", "text": "Mahānavamī, Medan, 2091: Saturday 20 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": "2091-10-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-20", "confidence": "determinate" } ], "quote": "In Medan, Mahānavamī 2091 falls on Saturday 20 October. Navamī runs from 04:43 on Sat 20 Oct to 04:58 on Sun 21 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vijaya-dashami", "festival": "vijaya-dashami", "name": "Vijayā Daśamī", "everyday": "Dussehra", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4303, "anga": { "type": "tithi", "index": 9, "key": "dashami", "name": "Daśamī", "start": { "local": "2091-10-21T04:58:05+07:00", "utc": "2091-10-20T21:58:05Z", "ms": 3843755884885.5664 }, "end": { "local": "2091-10-22T05:53:18+07:00", "utc": "2091-10-21T22:53:18Z", "ms": 3843845598496.9106 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "conjunction", "start": { "local": "2091-10-21T04:58:05+07:00", "utc": "2091-10-20T21:58:05Z", "ms": 3843755884885.5664 }, "end": { "local": "2091-10-21T10:05:29+07:00", "utc": "2091-10-21T03:05:29Z", "ms": 3843774329394.776 }, "nakshatra": { "type": "nakshatra", "index": 21, "key": "shravana", "name": "Śravaṇa", "start": { "local": "2091-10-20T09:05:46+07:00", "utc": "2091-10-20T02:05:46Z", "ms": 3843684345586.441 }, "end": { "local": "2091-10-21T10:05:29+07:00", "utc": "2091-10-21T03:05:29Z", "ms": 3843774329394.776 } } }, "kaala": "daytime", "days": [ { "local_date": "2091-10-20", "window": { "start": { "local": "2091-10-20T06:09:53+07:00", "utc": "2091-10-19T23:09:53Z", "ms": 3843673793219.381 }, "end": { "local": "2091-10-20T18:10:53+07:00", "utc": "2091-10-20T11:10:53Z", "ms": 3843717053018.8545 } }, "covered_min": 0, "window_min": 721, "qualifies": false }, { "local_date": "2091-10-21", "window": { "start": { "local": "2091-10-21T06:09:48+07:00", "utc": "2091-10-20T23:09:48Z", "ms": 3843760188262.9746 }, "end": { "local": "2091-10-21T18:10:38+07:00", "utc": "2091-10-21T11:10:38Z", "ms": 3843803437745.7544 } }, "covered_min": 236, "window_min": 721, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Daśamī runs from 04:58 on Sun 21 Oct to 05:53 on Mon 22 Oct, and Śravaṇa from 09:06 on Sat 20 Oct to 10:05 on Sun 21 Oct. They are together from 04:58 on Sun 21 Oct to 10:05 on Sun 21 Oct.", "fact": "2091-10-20T21:58:05Z → 2091-10-21T03:05:29Z" }, { "step": "kaala", "text": "The day time is sunrise to sunset: 06:10–18:11 on the 20th, 06:10–18:11 on the 21st.", "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 721 minutes on the 20th and 236 of 721 on the 21st.", "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 4303 s" }, { "step": "ruling", "text": "Vijayā Daśamī, Medan, 2091: Sunday 21 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": "2091-10-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-21", "confidence": "determinate" } ], "quote": "In Medan, Vijayā Daśamī (Dussehra) 2091 falls on Sunday 21 October. Daśamī runs from 04:58 on Sun 21 Oct to 05:53 on Mon 22 Oct and is with Śravaṇa in the day time that day, for 236 minutes.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-10-23", "festival": "ekadashi", "name": "Pāśāṅkuśā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 985, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-10-22T05:53:18+07:00", "utc": "2091-10-21T22:53:18Z", "ms": 3843845598496.9106 }, "end": { "local": "2091-10-23T07:21:56+07:00", "utc": "2091-10-23T00:21:56Z", "ms": 3843937316355.252 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-22T05:53:18+07:00", "utc": "2091-10-21T22:53:18Z", "ms": 3843845598496.9106 }, "end": { "local": "2091-10-23T07:21:56+07:00", "utc": "2091-10-23T00:21:56Z", "ms": 3843937316355.252 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-10-22", "window": { "start": { "local": "2091-10-22T06:09:44+07:00", "utc": "2091-10-21T23:09:44Z", "ms": 3843846583912.505 }, "end": { "local": "2091-10-22T06:09:44+07:00", "utc": "2091-10-21T23:09:44Z", "ms": 3843846583912.505 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-10-23", "window": { "start": { "local": "2091-10-23T06:09:40+07:00", "utc": "2091-10-22T23:09:40Z", "ms": 3843932980184.018 }, "end": { "local": "2091-10-23T06:09:40+07:00", "utc": "2091-10-22T23:09:40Z", "ms": 3843932980184.018 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 05:53 on Mon 22 Oct to 07:22 on Tue 23 Oct.", "fact": "2091-10-21T22:53:18Z → 2091-10-23T00:21:56Z" }, { "step": "kaala", "text": "Sunrise is at 06:10 on the 22nd and 06:10 on the 23rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 22nd and is on the 23rd.", "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 985 s" }, { "step": "ruling", "text": "Pāśāṅkuśā Ekādaśī, Medan, 2091: Tuesday 23 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": "2091-10-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-23", "confidence": "determinate" } ], "quote": "In Medan, Pāśāṅkuśā Ekādaśī 2091 falls on Tuesday 23 October. Ekādaśī runs from 05:53 on Mon 22 Oct to 07:22 on Tue 23 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-10-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-10-24", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24104, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-10-24T09:16:05+07:00", "utc": "2091-10-24T02:16:05Z", "ms": 3844030565216.8296 }, "end": { "local": "2091-10-25T11:28:00+07:00", "utc": "2091-10-25T04:28:00Z", "ms": 3844124880150.4224 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "2091-10-24T09:16:05+07:00", "utc": "2091-10-24T02:16:05Z", "ms": 3844030565216.8296 }, "end": { "local": "2091-10-25T11:28:00+07:00", "utc": "2091-10-25T04:28:00Z", "ms": 3844124880150.4224 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-10-24", "window": { "start": { "local": "2091-10-24T18:09:56+07:00", "utc": "2091-10-24T11:09:56Z", "ms": 3844062596107.5923 }, "end": { "local": "2091-10-24T19:45:53+07:00", "utc": "2091-10-24T12:45:53Z", "ms": 3844068353247.4854 } }, "covered_min": 96, "window_min": 96, "qualifies": true }, { "local_date": "2091-10-25", "window": { "start": { "local": "2091-10-25T18:09:44+07:00", "utc": "2091-10-25T11:09:44Z", "ms": 3844148983683.638 }, "end": { "local": "2091-10-25T19:45:42+07:00", "utc": "2091-10-25T12:45:42Z", "ms": 3844154742244.407 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 09:16 on Wed 24 Oct to 11:28 on Thu 25 Oct.", "fact": "2091-10-24T02:16:05Z → 2091-10-25T04:28:00Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:10–19:46 on the 24th, 18:10–19:46 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 96 of 96 minutes on the 24th and 0 of 96 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 24104 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Wednesday 24 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": "2091-10-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-24", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Wednesday 24 October. Trayodaśī runs from 09:16 on Wed 24 Oct to 11:28 on Thu 25 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-10-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/karaka-chaturthi", "festival": "karaka-chaturthi", "name": "Karaka Caturthī", "everyday": "Karwa Chauth", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10998, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-10-30T23:34:12+07:00", "utc": "2091-10-30T16:34:12Z", "ms": 3844600452437.6196 }, "end": { "local": "2091-11-01T01:39:38+07:00", "utc": "2091-10-31T18:39:38Z", "ms": 3844694378185.9443 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-10-30T23:34:12+07:00", "utc": "2091-10-30T16:34:12Z", "ms": 3844600452437.6196 }, "end": { "local": "2091-11-01T01:39:38+07:00", "utc": "2091-10-31T18:39:38Z", "ms": 3844694378185.9443 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-10-30", "window": { "start": { "local": "2091-10-30T20:30:54+07:00", "utc": "2091-10-30T13:30:54Z", "ms": 3844589454339.6113 }, "end": { "local": "2091-10-30T20:30:54+07:00", "utc": "2091-10-30T13:30:54Z", "ms": 3844589454339.6113 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-10-31", "window": { "start": { "local": "2091-10-31T21:18:14+07:00", "utc": "2091-10-31T14:18:14Z", "ms": 3844678693820.893 }, "end": { "local": "2091-10-31T21:18:14+07:00", "utc": "2091-10-31T14:18:14Z", "ms": 3844678693820.893 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:34 on Tue 30 Oct to 01:40 on Thu 1 Nov.", "fact": "2091-10-30T16:34:12Z → 2091-10-31T18:39:38Z" }, { "step": "kaala", "text": "Moonrise is at 20:31 on the 30th and 21:18 on the 31st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 30th and is on the 31st.", "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 10998 s" }, { "step": "ruling", "text": "Karaka Caturthī, Medan, 2091: Wednesday 31 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": "2091-10-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-31", "confidence": "determinate" } ], "quote": "In Medan, Karaka Caturthī (Karwa Chauth) 2091 falls on Wednesday 31 October. Caturthī runs from 23:34 on Tue 30 Oct to 01:40 on Thu 1 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-10-31", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-10-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10998, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-10-30T23:34:12+07:00", "utc": "2091-10-30T16:34:12Z", "ms": 3844600452437.6196 }, "end": { "local": "2091-11-01T01:39:38+07:00", "utc": "2091-10-31T18:39:38Z", "ms": 3844694378185.9443 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-10-30T23:34:12+07:00", "utc": "2091-10-30T16:34:12Z", "ms": 3844600452437.6196 }, "end": { "local": "2091-11-01T01:39:38+07:00", "utc": "2091-10-31T18:39:38Z", "ms": 3844694378185.9443 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-10-30", "window": { "start": { "local": "2091-10-30T20:30:54+07:00", "utc": "2091-10-30T13:30:54Z", "ms": 3844589454339.6113 }, "end": { "local": "2091-10-30T20:30:54+07:00", "utc": "2091-10-30T13:30:54Z", "ms": 3844589454339.6113 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-10-31", "window": { "start": { "local": "2091-10-31T21:18:14+07:00", "utc": "2091-10-31T14:18:14Z", "ms": 3844678693820.893 }, "end": { "local": "2091-10-31T21:18:14+07:00", "utc": "2091-10-31T14:18:14Z", "ms": 3844678693820.893 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:34 on Tue 30 Oct to 01:40 on Thu 1 Nov.", "fact": "2091-10-30T16:34:12Z → 2091-10-31T18:39:38Z" }, { "step": "kaala", "text": "Moonrise is at 20:31 on the 30th and 21:18 on the 31st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 30th and is on the 31st.", "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 10998 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Wednesday 31 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": "2091-10-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-10-31", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Wednesday 31 October. Caturthī runs from 23:34 on Tue 30 Oct to 01:40 on Thu 1 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-10-31", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ahoyi-ashtami", "festival": "ahoyi-ashtami", "name": "Ahoyī Aṣṭamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16960, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-11-04T05:23:10+07:00", "utc": "2091-11-03T22:23:10Z", "ms": 3844966989538.821 }, "end": { "local": "2091-11-05T05:22:24+07:00", "utc": "2091-11-04T22:22:24Z", "ms": 3845053344182.9404 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-04T05:23:10+07:00", "utc": "2091-11-03T22:23:10Z", "ms": 3844966989538.821 }, "end": { "local": "2091-11-05T05:22:24+07:00", "utc": "2091-11-04T22:22:24Z", "ms": 3845053344182.9404 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-11-03", "window": { "start": { "local": "2091-11-03T23:48:07+07:00", "utc": "2091-11-03T16:48:07Z", "ms": 3844946886987.091 }, "end": { "local": "2091-11-03T23:48:07+07:00", "utc": "2091-11-03T16:48:07Z", "ms": 3844946886987.091 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-11-04", "window": { "start": { "local": "2091-11-05T00:39:44+07:00", "utc": "2091-11-04T17:39:44Z", "ms": 3845036384063.565 }, "end": { "local": "2091-11-05T00:39:44+07:00", "utc": "2091-11-04T17:39:44Z", "ms": 3845036384063.565 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 05:23 on Sun 4 Nov to 05:22 on Mon 5 Nov.", "fact": "2091-11-03T22:23:10Z → 2091-11-04T22:22:24Z" }, { "step": "kaala", "text": "Moonrise is at 23:48 on the 3rd and 00:40 on the 4th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is not on the 3rd and is on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 16960 s" }, { "step": "ruling", "text": "Ahoyī Aṣṭamī, Medan, 2091: Sunday 4 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ahoyi-ashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Ahoyi astami (Gujerat) (current at moonrise), Karastami (Maharashtra). If occurs on two successive days, it is to be observed on the second day." } ], "kaala": "moonrise", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-11-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-04", "confidence": "determinate" } ], "quote": "In Medan, Ahoyī Aṣṭamī 2091 falls on Sunday 4 November. Aṣṭamī runs from 05:23 on Sun 4 Nov to 05:22 on Mon 5 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-11-07", "festival": "ekadashi", "name": "Ramā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11264, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-11-07T03:02:25+07:00", "utc": "2091-11-06T20:02:25Z", "ms": 3845217745085.2246 }, "end": { "local": "2091-11-08T00:45:12+07:00", "utc": "2091-11-07T17:45:12Z", "ms": 3845295911737.512 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-07T03:02:25+07:00", "utc": "2091-11-06T20:02:25Z", "ms": 3845217745085.2246 }, "end": { "local": "2091-11-08T00:45:12+07:00", "utc": "2091-11-07T17:45:12Z", "ms": 3845295911737.512 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-11-07", "window": { "start": { "local": "2091-11-07T06:10:09+07:00", "utc": "2091-11-06T23:10:09Z", "ms": 3845229008673.8716 }, "end": { "local": "2091-11-07T06:10:09+07:00", "utc": "2091-11-06T23:10:09Z", "ms": 3845229008673.8716 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-11-08", "window": { "start": { "local": "2091-11-08T06:10:17+07:00", "utc": "2091-11-07T23:10:17Z", "ms": 3845315416696.5327 }, "end": { "local": "2091-11-08T06:10:17+07:00", "utc": "2091-11-07T23:10:17Z", "ms": 3845315416696.5327 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:02 on Wed 7 Nov to 00:45 on Thu 8 Nov.", "fact": "2091-11-06T20:02:25Z → 2091-11-07T17:45:12Z" }, { "step": "kaala", "text": "Sunrise is at 06:10 on the 7th and 06:10 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 11264 s" }, { "step": "ruling", "text": "Ramā Ekādaśī, Medan, 2091: Wednesday 7 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": "2091-11-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-07", "confidence": "determinate" } ], "quote": "In Medan, Ramā Ekādaśī 2091 falls on Wednesday 7 November. Ekādaśī runs from 03:02 on Wed 7 Nov to 00:45 on Thu 8 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-11-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/govatsa-dvadashi", "festival": "govatsa-dvadashi", "name": "Govatsa Dvādaśī", "everyday": "Vasu Baras", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7511, "anga": { "type": "tithi", "index": 26, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-11-08T00:45:12+07:00", "utc": "2091-11-07T17:45:12Z", "ms": 3845295911737.512 }, "end": { "local": "2091-11-08T21:49:45+07:00", "utc": "2091-11-08T14:49:45Z", "ms": 3845371785041.12 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-08T00:45:12+07:00", "utc": "2091-11-07T17:45:12Z", "ms": 3845295911737.512 }, "end": { "local": "2091-11-08T21:49:45+07:00", "utc": "2091-11-08T14:49:45Z", "ms": 3845371785041.12 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-11-07", "window": { "start": { "local": "2091-11-07T18:08:17+07:00", "utc": "2091-11-07T11:08:17Z", "ms": 3845272096877.8667 }, "end": { "local": "2091-11-07T19:44:33+07:00", "utc": "2091-11-07T12:44:33Z", "ms": 3845277872853.689 } }, "covered_min": 0, "window_min": 96, "qualifies": false }, { "local_date": "2091-11-08", "window": { "start": { "local": "2091-11-08T18:08:16+07:00", "utc": "2091-11-08T11:08:16Z", "ms": 3845358496392.9688 }, "end": { "local": "2091-11-08T19:44:34+07:00", "utc": "2091-11-08T12:44:34Z", "ms": 3845364273609.369 } }, "covered_min": 96, "window_min": 96, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 00:45 on Thu 8 Nov to 21:50 on Thu 8 Nov.", "fact": "2091-11-07T17:45:12Z → 2091-11-08T14:49:45Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:08–19:45 on the 7th, 18:08–19:45 on the 8th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during pradoṣa. It covers 0 of 96 minutes on the 7th and 96 of 96 on the 8th.", "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 7511 s" }, { "step": "ruling", "text": "Govatsa Dvādaśī, Medan, 2091: Thursday 8 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": "2091-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-08", "confidence": "determinate" } ], "quote": "In Medan, Govatsa Dvādaśī (Vasu Baras) 2091 falls on Thursday 8 November. Dvādaśī runs from 00:45 on Thu 8 Nov to 21:50 on Thu 8 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/yama-dipadana", "festival": "yama-dipadana", "name": "Yama Dīpadāna", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 957, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-11-08T21:49:45+07:00", "utc": "2091-11-08T14:49:45Z", "ms": 3845371785041.12 }, "end": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-08T21:49:45+07:00", "utc": "2091-11-08T14:49:45Z", "ms": 3845371785041.12 }, "end": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-11-08", "window": { "start": { "local": "2091-11-08T18:08:16+07:00", "utc": "2091-11-08T11:08:16Z", "ms": 3845358496392.9688 }, "end": { "local": "2091-11-08T19:44:34+07:00", "utc": "2091-11-08T12:44:34Z", "ms": 3845364273609.369 } }, "covered_min": 0, "window_min": 96, "qualifies": false }, { "local_date": "2091-11-09", "window": { "start": { "local": "2091-11-09T18:08:17+07:00", "utc": "2091-11-09T11:08:17Z", "ms": 3845444896830.6465 }, "end": { "local": "2091-11-09T19:44:35+07:00", "utc": "2091-11-09T12:44:35Z", "ms": 3845450675270.522 } }, "covered_min": 16, "window_min": 96, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 21:50 on Thu 8 Nov to 18:24 on Fri 9 Nov.", "fact": "2091-11-08T14:49:45Z → 2091-11-09T11:24:14Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:08–19:45 on the 8th, 18:08–19:45 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 0 of 96 minutes on the 8th and 16 of 96 on the 9th.", "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 957 s" }, { "step": "ruling", "text": "Yama Dīpadāna, Medan, 2091: Friday 9 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": "2091-11-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-09", "confidence": "determinate" } ], "quote": "In Medan, Yama Dīpadāna 2091 falls on Friday 9 November. Trayodaśī runs from 21:50 on Thu 8 Nov to 18:24 on Fri 9 Nov and covers 16 of 96 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pradosha-vrata?on=2091-11-09", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 957, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-11-08T21:49:45+07:00", "utc": "2091-11-08T14:49:45Z", "ms": 3845371785041.12 }, "end": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-08T21:49:45+07:00", "utc": "2091-11-08T14:49:45Z", "ms": 3845371785041.12 }, "end": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-11-08", "window": { "start": { "local": "2091-11-08T18:08:16+07:00", "utc": "2091-11-08T11:08:16Z", "ms": 3845358496392.9688 }, "end": { "local": "2091-11-08T19:44:34+07:00", "utc": "2091-11-08T12:44:34Z", "ms": 3845364273609.369 } }, "covered_min": 0, "window_min": 96, "qualifies": false }, { "local_date": "2091-11-09", "window": { "start": { "local": "2091-11-09T18:08:17+07:00", "utc": "2091-11-09T11:08:17Z", "ms": 3845444896830.6465 }, "end": { "local": "2091-11-09T19:44:35+07:00", "utc": "2091-11-09T12:44:35Z", "ms": 3845450675270.522 } }, "covered_min": 16, "window_min": 96, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 21:50 on Thu 8 Nov to 18:24 on Fri 9 Nov.", "fact": "2091-11-08T14:49:45Z → 2091-11-09T11:24:14Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:08–19:45 on the 8th, 18:08–19:45 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 0 of 96 minutes on the 8th and 16 of 96 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 957 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Friday 9 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": "2091-11-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-09", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Friday 9 November. Trayodaśī runs from 21:50 on Thu 8 Nov to 18:24 on Fri 9 Nov and covers 16 of 96 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-11-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-11-09", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19272, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 }, "end": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 }, "end": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 } }, "kaala": "nishita", "days": [ { "local_date": "2091-11-09", "window": { "start": { "local": "2091-11-09T23:45:26+07:00", "utc": "2091-11-09T16:45:26Z", "ms": 3845465125980.1787 }, "end": { "local": "2091-11-10T00:33:26+07:00", "utc": "2091-11-09T17:33:26Z", "ms": 3845468005980.1787 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-11-10", "window": { "start": { "local": "2091-11-10T23:45:32+07:00", "utc": "2091-11-10T16:45:32Z", "ms": 3845551531862.1006 }, "end": { "local": "2091-11-11T00:33:32+07:00", "utc": "2091-11-10T17:33:32Z", "ms": 3845554411862.1006 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 18:24 on Fri 9 Nov to 14:39 on Sat 10 Nov.", "fact": "2091-11-09T11:24:14Z → 2091-11-10T07:38:34Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:45–00:33 on the 9th, 23:46–00:34 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 19272 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Friday 9 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": "2091-11-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-09", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Friday 9 November. Caturdaśī runs from 18:24 on Fri 9 Nov to 14:39 on Sat 10 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-11-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/naraka-chaturdashi", "festival": "naraka-chaturdashi", "name": "Naraka Caturdaśī", "everyday": "Choti Diwali", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30479, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 }, "end": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-09T18:24:14+07:00", "utc": "2091-11-09T11:24:14Z", "ms": 3845445853915.8145 }, "end": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 } }, "kaala": "arunodaya", "days": [ { "local_date": "2091-11-09", "window": { "start": { "local": "2091-11-09T04:34:08+07:00", "utc": "2091-11-08T21:34:08Z", "ms": 3845396048299.5713 }, "end": { "local": "2091-11-09T06:10:26+07:00", "utc": "2091-11-08T23:10:26Z", "ms": 3845401825515.9717 } }, "covered_min": 0, "window_min": 96, "qualifies": false }, { "local_date": "2091-11-10", "window": { "start": { "local": "2091-11-10T04:34:17+07:00", "utc": "2091-11-09T21:34:17Z", "ms": 3845482456689.836 }, "end": { "local": "2091-11-10T06:10:35+07:00", "utc": "2091-11-09T23:10:35Z", "ms": 3845488235129.7114 } }, "covered_min": 96, "window_min": 96, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 18:24 on Fri 9 Nov to 14:39 on Sat 10 Nov.", "fact": "2091-11-09T11:24:14Z → 2091-11-10T07:38:34Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 04:34–06:10 on the 9th, 04:34–06:11 on the 10th.", "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 96 minutes on the 9th and 96 of 96 on the 10th.", "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 30479 s" }, { "step": "ruling", "text": "Naraka Caturdaśī, Medan, 2091: Saturday 10 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": "2091-11-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-10", "confidence": "determinate" } ], "quote": "In Medan, Naraka Caturdaśī (Choti Diwali) 2091 falls on Saturday 10 November. Caturdaśī runs from 18:24 on Fri 9 Nov to 14:39 on Sat 10 Nov and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/diwali-lakshmi-puja", "festival": "diwali-lakshmi-puja", "name": "Lakṣmī Pūjā", "everyday": "Diwali", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12584, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 }, "end": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 }, "end": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-11-10", "window": { "start": { "local": "2091-11-10T18:08:18+07:00", "utc": "2091-11-10T11:08:18Z", "ms": 3845531298191.111 }, "end": { "local": "2091-11-10T19:44:38+07:00", "utc": "2091-11-10T12:44:38Z", "ms": 3845537077836.708 } }, "covered_min": 96, "window_min": 96, "qualifies": true }, { "local_date": "2091-11-11", "window": { "start": { "local": "2091-11-11T18:08:20+07:00", "utc": "2091-11-11T11:08:20Z", "ms": 3845617700472.601 }, "end": { "local": "2091-11-11T19:44:41+07:00", "utc": "2091-11-11T12:44:41Z", "ms": 3845623481305.538 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 14:39 on Sat 10 Nov to 10:44 on Sun 11 Nov.", "fact": "2091-11-10T07:38:34Z → 2091-11-11T03:43:51Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:08–19:45 on the 10th, 18:08–19:45 on the 11th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during pradoṣa. It covers 96 of 96 minutes on the 10th and 0 of 96 on the 11th.", "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 12584 s" }, { "step": "ruling", "text": "Lakṣmī Pūjā, Medan, 2091: Saturday 10 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": "2091-11-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-10", "confidence": "determinate" } ], "quote": "In Medan, Lakṣmī Pūjā (Diwali) 2091 falls on Saturday 10 November. Amāvasyā runs from 14:39 on Sat 10 Nov to 10:44 on Sun 11 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/kali-puja", "festival": "kali-puja", "name": "Kālī Pūjā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32818, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 }, "end": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-10T14:38:34+07:00", "utc": "2091-11-10T07:38:34Z", "ms": 3845518714040.711 }, "end": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 } }, "kaala": "nishita", "days": [ { "local_date": "2091-11-10", "window": { "start": { "local": "2091-11-10T23:45:32+07:00", "utc": "2091-11-10T16:45:32Z", "ms": 3845551531862.1006 }, "end": { "local": "2091-11-11T00:33:32+07:00", "utc": "2091-11-10T17:33:32Z", "ms": 3845554411862.1006 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-11-11", "window": { "start": { "local": "2091-11-11T23:45:39+07:00", "utc": "2091-11-11T16:45:39Z", "ms": 3845637938596.1143 }, "end": { "local": "2091-11-12T00:33:39+07:00", "utc": "2091-11-11T17:33:39Z", "ms": 3845640818596.1143 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 14:39 on Sat 10 Nov to 10:44 on Sun 11 Nov.", "fact": "2091-11-10T07:38:34Z → 2091-11-11T03:43:51Z" }, { "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": "Amāvasyā must be present during niśītha. 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 32818 s" }, { "step": "ruling", "text": "Kālī Pūjā, Medan, 2091: Saturday 10 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": "2091-11-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-10", "confidence": "determinate" } ], "quote": "In Medan, Kālī Pūjā 2091 falls on Saturday 10 November. Amāvasyā runs from 14:39 on Sat 10 Nov to 10:44 on Sun 11 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/govardhana-puja", "festival": "govardhana-puja", "name": "Govardhana Pūjā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3702, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "end": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "end": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-11", "window": { "start": { "local": "2091-11-11T11:45:33+07:00", "utc": "2091-11-11T04:45:33Z", "ms": 3845594733002.8457 }, "end": { "local": "2091-11-11T12:33:33+07:00", "utc": "2091-11-11T05:33:33Z", "ms": 3845597613002.8457 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-11-12", "window": { "start": { "local": "2091-11-12T11:45:40+07:00", "utc": "2091-11-12T04:45:40Z", "ms": 3845681140195.7344 }, "end": { "local": "2091-11-12T12:33:40+07:00", "utc": "2091-11-12T05:33:40Z", "ms": 3845684020195.7344 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 10:44 on Sun 11 Nov to 06:52 on Mon 12 Nov.", "fact": "2091-11-11T03:43:51Z → 2091-11-11T23:51:46Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 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": "Pratipadā 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 3702 s" }, { "step": "ruling", "text": "Govardhana Pūjā, Medan, 2091: Sunday 11 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": "2091-11-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-11", "confidence": "determinate" } ], "quote": "In Medan, Govardhana Pūjā 2091 falls on Sunday 11 November. Pratipadā runs from 10:44 on Sun 11 Nov to 06:52 on Mon 12 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/bali-puja", "festival": "bali-puja", "name": "Bali Pūjā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26670, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "end": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "end": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-11-11", "window": { "start": { "local": "2091-11-11T18:08:20+07:00", "utc": "2091-11-11T11:08:20Z", "ms": 3845617700472.601 }, "end": { "local": "2091-11-11T19:44:41+07:00", "utc": "2091-11-11T12:44:41Z", "ms": 3845623481305.538 } }, "covered_min": 96, "window_min": 96, "qualifies": true }, { "local_date": "2091-11-12", "window": { "start": { "local": "2091-11-12T18:08:24+07:00", "utc": "2091-11-12T11:08:24Z", "ms": 3845704103671.842 }, "end": { "local": "2091-11-12T19:44:46+07:00", "utc": "2091-11-12T12:44:46Z", "ms": 3845709885673.143 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 10:44 on Sun 11 Nov to 06:52 on Mon 12 Nov.", "fact": "2091-11-11T03:43:51Z → 2091-11-11T23:51:46Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:08–19:45 on the 11th, 18:08–19:45 on the 12th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pradoṣa. It covers 96 of 96 minutes on the 11th and 0 of 96 on the 12th.", "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 26670 s" }, { "step": "ruling", "text": "Bali Pūjā, Medan, 2091: Sunday 11 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": "2091-11-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-11", "confidence": "determinate" } ], "quote": "In Medan, Bali Pūjā 2091 falls on Sunday 11 November. Pratipadā runs from 10:44 on Sun 11 Nov to 06:52 on Mon 12 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/yama-dvitiya", "festival": "yama-dvitiya", "name": "Yama Dvitīyā", "everyday": "Bhai Dooj", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17635, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 }, "end": { "local": "2091-11-13T03:14:08+07:00", "utc": "2091-11-12T20:14:08Z", "ms": 3845736847706.5474 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 }, "end": { "local": "2091-11-13T03:14:08+07:00", "utc": "2091-11-12T20:14:08Z", "ms": 3845736847706.5474 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-12", "window": { "start": { "local": "2091-11-12T11:45:40+07:00", "utc": "2091-11-12T04:45:40Z", "ms": 3845681140195.7344 }, "end": { "local": "2091-11-12T12:33:40+07:00", "utc": "2091-11-12T05:33:40Z", "ms": 3845684020195.7344 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-11-13", "window": { "start": { "local": "2091-11-13T11:45:48+07:00", "utc": "2091-11-13T04:45:48Z", "ms": 3845767548233.251 }, "end": { "local": "2091-11-13T12:33:48+07:00", "utc": "2091-11-13T05:33:48Z", "ms": 3845770428233.251 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 06:52 on Mon 12 Nov to 03:14 on Tue 13 Nov.", "fact": "2091-11-11T23:51:46Z → 2091-11-12T20:14:08Z" }, { "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": "Dvitīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 12th and 0 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 17635 s" }, { "step": "ruling", "text": "Yama Dvitīyā, Medan, 2091: Monday 12 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": "2091-11-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-12", "confidence": "determinate" } ], "quote": "In Medan, Yama Dvitīyā (Bhai Dooj) 2091 falls on Monday 12 November. Dvitīyā runs from 06:52 on Mon 12 Nov to 03:14 on Tue 13 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/dyuta-pratipad", "festival": "dyuta-pratipad", "name": "Dyūta Pratipad", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2033, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "end": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-11T10:43:51+07:00", "utc": "2091-11-11T03:43:51Z", "ms": 3845591030622.786 }, "end": { "local": "2091-11-12T06:51:46+07:00", "utc": "2091-11-11T23:51:46Z", "ms": 3845663505678.4546 } }, "kaala": "purvahna", "days": [ { "local_date": "2091-11-11", "window": { "start": { "local": "2091-11-11T06:10:46+07:00", "utc": "2091-11-10T23:10:46Z", "ms": 3845574645533.0903 }, "end": { "local": "2091-11-11T10:09:57+07:00", "utc": "2091-11-11T03:09:57Z", "ms": 3845588997179.5938 } }, "covered_min": 0, "window_min": 239, "qualifies": false }, { "local_date": "2091-11-12", "window": { "start": { "local": "2091-11-12T06:10:57+07:00", "utc": "2091-11-11T23:10:57Z", "ms": 3845661056719.627 }, "end": { "local": "2091-11-12T10:10:06+07:00", "utc": "2091-11-12T03:10:06Z", "ms": 3845675405703.6987 } }, "covered_min": 41, "window_min": 239, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 10:44 on Sun 11 Nov to 06:52 on Mon 12 Nov.", "fact": "2091-11-11T03:43:51Z → 2091-11-11T23:51:46Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:11–10:10 on the 11th, 06:11–10:10 on the 12th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pūrvāhṇa. It covers 0 of 239 minutes on the 11th and 41 of 239 on the 12th.", "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 2033 s" }, { "step": "ruling", "text": "Dyūta Pratipad, Medan, 2091: Monday 12 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": "2091-11-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-12", "confidence": "determinate" } ], "quote": "In Medan, Dyūta Pratipad 2091 falls on Monday 12 November. Pratipadā runs from 10:44 on Sun 11 Nov to 06:52 on Mon 12 Nov and covers 41 of 239 minutes of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/naga-chaturthi", "festival": "naga-chaturthi", "name": "Nāga Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31962, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-11-14T00:02:19+07:00", "utc": "2091-11-13T17:02:19Z", "ms": 3845811739409.7285 }, "end": { "local": "2091-11-14T21:26:39+07:00", "utc": "2091-11-14T14:26:39Z", "ms": 3845888798818.997 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-14T00:02:19+07:00", "utc": "2091-11-13T17:02:19Z", "ms": 3845811739409.7285 }, "end": { "local": "2091-11-14T21:26:39+07:00", "utc": "2091-11-14T14:26:39Z", "ms": 3845888798818.997 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-13", "window": { "start": { "local": "2091-11-13T11:45:48+07:00", "utc": "2091-11-13T04:45:48Z", "ms": 3845767548233.251 }, "end": { "local": "2091-11-13T12:33:48+07:00", "utc": "2091-11-13T05:33:48Z", "ms": 3845770428233.251 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-11-14", "window": { "start": { "local": "2091-11-14T11:45:57+07:00", "utc": "2091-11-14T04:45:57Z", "ms": 3845853957109.124 }, "end": { "local": "2091-11-14T12:33:57+07:00", "utc": "2091-11-14T05:33:57Z", "ms": 3845856837109.124 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 00:02 on Wed 14 Nov to 21:27 on Wed 14 Nov.", "fact": "2091-11-13T17:02:19Z → 2091-11-14T14:26:39Z" }, { "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": "Caturthī 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 31962 s" }, { "step": "ruling", "text": "Nāga Caturthī, Medan, 2091: Wednesday 14 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": "2091-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-14", "confidence": "determinate" } ], "quote": "In Medan, Nāga Caturthī 2091 falls on Wednesday 14 November. Caturthī runs from 00:02 on Wed 14 Nov to 21:27 on Wed 14 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-11-14", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31962, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-11-14T00:02:19+07:00", "utc": "2091-11-13T17:02:19Z", "ms": 3845811739409.7285 }, "end": { "local": "2091-11-14T21:26:39+07:00", "utc": "2091-11-14T14:26:39Z", "ms": 3845888798818.997 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-14T00:02:19+07:00", "utc": "2091-11-13T17:02:19Z", "ms": 3845811739409.7285 }, "end": { "local": "2091-11-14T21:26:39+07:00", "utc": "2091-11-14T14:26:39Z", "ms": 3845888798818.997 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-13", "window": { "start": { "local": "2091-11-13T11:45:48+07:00", "utc": "2091-11-13T04:45:48Z", "ms": 3845767548233.251 }, "end": { "local": "2091-11-13T12:33:48+07:00", "utc": "2091-11-13T05:33:48Z", "ms": 3845770428233.251 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-11-14", "window": { "start": { "local": "2091-11-14T11:45:57+07:00", "utc": "2091-11-14T04:45:57Z", "ms": 3845853957109.124 }, "end": { "local": "2091-11-14T12:33:57+07:00", "utc": "2091-11-14T05:33:57Z", "ms": 3845856837109.124 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 00:02 on Wed 14 Nov to 21:27 on Wed 14 Nov.", "fact": "2091-11-13T17:02:19Z → 2091-11-14T14:26:39Z" }, { "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": "Caturthī 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. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 31962 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Wednesday 14 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": "2091-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-14", "confidence": "determinate" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Wednesday 14 November. Caturthī runs from 00:02 on Wed 14 Nov to 21:27 on Wed 14 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-11-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/surya-shashthi", "festival": "surya-shashthi", "name": "Sūrya Ṣaṣṭhī", "everyday": "Chhath", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21616, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-11-15T19:35:31+07:00", "utc": "2091-11-15T12:35:31Z", "ms": 3845968531125.6396 }, "end": { "local": "2091-11-16T18:34:33+07:00", "utc": "2091-11-16T11:34:33Z", "ms": 3846051273301.4136 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-15T19:35:31+07:00", "utc": "2091-11-15T12:35:31Z", "ms": 3845968531125.6396 }, "end": { "local": "2091-11-16T18:34:33+07:00", "utc": "2091-11-16T11:34:33Z", "ms": 3846051273301.4136 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-15", "window": { "start": { "local": "2091-11-15T11:46:07+07:00", "utc": "2091-11-15T04:46:07Z", "ms": 3845940366817.2 }, "end": { "local": "2091-11-15T12:34:07+07:00", "utc": "2091-11-15T05:34:07Z", "ms": 3845943246817.2 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-11-16", "window": { "start": { "local": "2091-11-16T11:46:17+07:00", "utc": "2091-11-16T04:46:17Z", "ms": 3846026777351.6123 }, "end": { "local": "2091-11-16T12:34:17+07:00", "utc": "2091-11-16T05:34:17Z", "ms": 3846029657351.6123 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 19:36 on Thu 15 Nov to 18:35 on Fri 16 Nov.", "fact": "2091-11-15T12:35:31Z → 2091-11-16T11:34:33Z" }, { "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": "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. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 21616 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī, Medan, 2091: Friday 16 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": "2091-11-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-16", "confidence": "determinate" } ], "quote": "In Medan, Sūrya Ṣaṣṭhī (Chhath) 2091 falls on Friday 16 November. Ṣaṣṭhī runs from 19:36 on Thu 15 Nov to 18:35 on Fri 16 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/gopashtami", "festival": "gopashtami", "name": "Gopāṣṭamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21072, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "2091-11-17T18:25:41+07:00", "utc": "2091-11-17T11:25:41Z", "ms": 3846137141089.8296 }, "end": { "local": "2091-11-18T19:06:36+07:00", "utc": "2091-11-18T12:06:36Z", "ms": 3846225995727.608 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-17T18:25:41+07:00", "utc": "2091-11-17T11:25:41Z", "ms": 3846137141089.8296 }, "end": { "local": "2091-11-18T19:06:36+07:00", "utc": "2091-11-18T12:06:36Z", "ms": 3846225995727.608 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-17", "window": { "start": { "local": "2091-11-17T11:46:29+07:00", "utc": "2091-11-17T04:46:29Z", "ms": 3846113188706.7236 }, "end": { "local": "2091-11-17T12:34:29+07:00", "utc": "2091-11-17T05:34:29Z", "ms": 3846116068706.7236 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-11-18", "window": { "start": { "local": "2091-11-18T11:46:41+07:00", "utc": "2091-11-18T04:46:41Z", "ms": 3846199600876.927 }, "end": { "local": "2091-11-18T12:34:41+07:00", "utc": "2091-11-18T05:34:41Z", "ms": 3846202480876.927 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 18:26 on Sat 17 Nov to 19:07 on Sun 18 Nov.", "fact": "2091-11-17T11:25:41Z → 2091-11-18T12:06:36Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:46–12:34 on the 17th, 11:47–12:35 on the 18th.", "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 17th and 48 of 48 on the 18th.", "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 21072 s" }, { "step": "ruling", "text": "Gopāṣṭamī, Medan, 2091: Sunday 18 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "gopashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 8 Gopastami, Gosthastami." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "2091-11-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-18", "confidence": "determinate" } ], "quote": "In Medan, Gopāṣṭamī 2091 falls on Sunday 18 November. Aṣṭamī runs from 18:26 on Sat 17 Nov to 19:07 on Sun 18 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/akshaya-navami", "festival": "akshaya-navami", "name": "Akṣaya Navamī", "everyday": "Amla Navami", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32122, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "2091-11-18T19:06:36+07:00", "utc": "2091-11-18T12:06:36Z", "ms": 3846225995727.608 }, "end": { "local": "2091-11-19T20:30:50+07:00", "utc": "2091-11-19T13:30:50Z", "ms": 3846317450155.9053 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-18T19:06:36+07:00", "utc": "2091-11-18T12:06:36Z", "ms": 3846225995727.608 }, "end": { "local": "2091-11-19T20:30:50+07:00", "utc": "2091-11-19T13:30:50Z", "ms": 3846317450155.9053 } }, "kaala": "purvahna", "days": [ { "local_date": "2091-11-18", "window": { "start": { "local": "2091-11-18T06:12:20+07:00", "utc": "2091-11-17T23:12:20Z", "ms": 3846179539837.171 }, "end": { "local": "2091-11-18T10:11:14+07:00", "utc": "2091-11-18T03:11:14Z", "ms": 3846193873863.675 } }, "covered_min": 0, "window_min": 239, "qualifies": false }, { "local_date": "2091-11-19", "window": { "start": { "local": "2091-11-19T06:12:36+07:00", "utc": "2091-11-18T23:12:36Z", "ms": 3846265956282.423 }, "end": { "local": "2091-11-19T10:11:28+07:00", "utc": "2091-11-19T03:11:28Z", "ms": 3846280287998.409 } }, "covered_min": 239, "window_min": 239, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 19:07 on Sun 18 Nov to 20:31 on Mon 19 Nov.", "fact": "2091-11-18T12:06:36Z → 2091-11-19T13:30:50Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:12–10:11 on the 18th, 06:13–10:11 on the 19th.", "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 239 minutes on the 18th and 239 of 239 on the 19th.", "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 32122 s" }, { "step": "ruling", "text": "Akṣaya Navamī, Medan, 2091: Monday 19 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": "2091-11-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-19", "confidence": "determinate" } ], "quote": "In Medan, Akṣaya Navamī (Amla Navami) 2091 falls on Monday 19 November. Navamī runs from 19:07 on Sun 18 Nov to 20:31 on Mon 19 Nov and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/durga-navami", "festival": "durga-navami", "name": "Durgā Navamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23515, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "2091-11-18T19:06:36+07:00", "utc": "2091-11-18T12:06:36Z", "ms": 3846225995727.608 }, "end": { "local": "2091-11-19T20:30:50+07:00", "utc": "2091-11-19T13:30:50Z", "ms": 3846317450155.9053 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-18T19:06:36+07:00", "utc": "2091-11-18T12:06:36Z", "ms": 3846225995727.608 }, "end": { "local": "2091-11-19T20:30:50+07:00", "utc": "2091-11-19T13:30:50Z", "ms": 3846317450155.9053 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-18", "window": { "start": { "local": "2091-11-18T11:46:41+07:00", "utc": "2091-11-18T04:46:41Z", "ms": 3846199600876.927 }, "end": { "local": "2091-11-18T12:34:41+07:00", "utc": "2091-11-18T05:34:41Z", "ms": 3846202480876.927 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-11-19", "window": { "start": { "local": "2091-11-19T11:46:54+07:00", "utc": "2091-11-19T04:46:54Z", "ms": 3846286013856.4023 }, "end": { "local": "2091-11-19T12:34:54+07:00", "utc": "2091-11-19T05:34:54Z", "ms": 3846288893856.4023 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 19:07 on Sun 18 Nov to 20:31 on Mon 19 Nov.", "fact": "2091-11-18T12:06:36Z → 2091-11-19T13:30:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 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": "Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 18th and 48 of 48 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 23515 s" }, { "step": "ruling", "text": "Durgā Navamī, Medan, 2091: Monday 19 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": "2091-11-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-19", "confidence": "determinate" } ], "quote": "In Medan, Durgā Navamī 2091 falls on Monday 19 November. Navamī runs from 19:07 on Sun 18 Nov to 20:31 on Mon 19 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-11-21", "festival": "ekadashi", "name": "Prabodhinī Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19461, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-11-20T22:28:45+07:00", "utc": "2091-11-20T15:28:45Z", "ms": 3846410925483.668 }, "end": { "local": "2091-11-22T00:49:09+07:00", "utc": "2091-11-21T17:49:09Z", "ms": 3846505748535.7456 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-20T22:28:45+07:00", "utc": "2091-11-20T15:28:45Z", "ms": 3846410925483.668 }, "end": { "local": "2091-11-22T00:49:09+07:00", "utc": "2091-11-21T17:49:09Z", "ms": 3846505748535.7456 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-11-21", "window": { "start": { "local": "2091-11-21T06:13:11+07:00", "utc": "2091-11-20T23:13:11Z", "ms": 3846438791323.159 }, "end": { "local": "2091-11-21T06:13:11+07:00", "utc": "2091-11-20T23:13:11Z", "ms": 3846438791323.159 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-11-22", "window": { "start": { "local": "2091-11-22T06:13:30+07:00", "utc": "2091-11-21T23:13:30Z", "ms": 3846525209900.697 }, "end": { "local": "2091-11-22T06:13:30+07:00", "utc": "2091-11-21T23:13:30Z", "ms": 3846525209900.697 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 22:29 on Tue 20 Nov to 00:49 on Thu 22 Nov.", "fact": "2091-11-20T15:28:45Z → 2091-11-21T17:49:09Z" }, { "step": "kaala", "text": "Sunrise is at 06:13 on the 21st and 06:13 on the 22nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 21st and is not on the 22nd.", "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 19461 s" }, { "step": "ruling", "text": "Prabodhinī Ekādaśī, Medan, 2091: Wednesday 21 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": "2091-11-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-21", "confidence": "determinate" } ], "quote": "In Medan, Prabodhinī Ekādaśī 2091 falls on Wednesday 21 November. Ekādaśī runs from 22:29 on Tue 20 Nov to 00:49 on Thu 22 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-11-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-11-23", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27284, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-11-23T03:21:01+07:00", "utc": "2091-11-22T20:21:01Z", "ms": 3846601261384.391 }, "end": { "local": "2091-11-24T05:55:08+07:00", "utc": "2091-11-23T22:55:08Z", "ms": 3846696907926.315 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-23T03:21:01+07:00", "utc": "2091-11-22T20:21:01Z", "ms": 3846601261384.391 }, "end": { "local": "2091-11-24T05:55:08+07:00", "utc": "2091-11-23T22:55:08Z", "ms": 3846696907926.315 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-11-22", "window": { "start": { "local": "2091-11-22T18:09:45+07:00", "utc": "2091-11-22T11:09:45Z", "ms": 3846568185269.3364 }, "end": { "local": "2091-11-22T19:46:18+07:00", "utc": "2091-11-22T12:46:18Z", "ms": 3846573977789.4077 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "2091-11-23", "window": { "start": { "local": "2091-11-23T18:09:58+07:00", "utc": "2091-11-23T11:09:58Z", "ms": 3846654598295.729 }, "end": { "local": "2091-11-23T19:46:32+07:00", "utc": "2091-11-23T12:46:32Z", "ms": 3846660391738.9424 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 03:21 on Fri 23 Nov to 05:55 on Sat 24 Nov.", "fact": "2091-11-22T20:21:01Z → 2091-11-23T22:55:08Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:10–19:46 on the 22nd, 18:10–19:47 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 0 of 97 minutes on the 22nd and 97 of 97 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 27284 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Friday 23 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": "2091-11-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-23", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Friday 23 November. Trayodaśī runs from 03:21 on Fri 23 Nov to 05:55 on Sat 24 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-11-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/kartiki-purnima", "festival": "kartiki-purnima", "name": "Kārtikī Pūrṇimā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3844, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-11-25T08:24:35+07:00", "utc": "2091-11-25T01:24:35Z", "ms": 3846792274671.604 }, "end": { "local": "2091-11-26T10:44:43+07:00", "utc": "2091-11-26T03:44:43Z", "ms": 3846887083244.33 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-25T08:24:35+07:00", "utc": "2091-11-25T01:24:35Z", "ms": 3846792274671.604 }, "end": { "local": "2091-11-26T10:44:43+07:00", "utc": "2091-11-26T03:44:43Z", "ms": 3846887083244.33 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-11-25", "window": { "start": { "local": "2091-11-25T11:48:28+07:00", "utc": "2091-11-25T04:48:28Z", "ms": 3846804508332.0723 }, "end": { "local": "2091-11-25T12:36:28+07:00", "utc": "2091-11-25T05:36:28Z", "ms": 3846807388332.0723 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-11-26", "window": { "start": { "local": "2091-11-26T11:48:47+07:00", "utc": "2091-11-26T04:48:47Z", "ms": 3846890926762.5674 }, "end": { "local": "2091-11-26T12:36:47+07:00", "utc": "2091-11-26T05:36:47Z", "ms": 3846893806762.5674 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 08:25 on Sun 25 Nov to 10:45 on Mon 26 Nov.", "fact": "2091-11-25T01:24:35Z → 2091-11-26T03:44:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 25th, 11:49–12:37 on the 26th.", "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 25th and 0 of 48 on the 26th.", "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 3844 s" }, { "step": "ruling", "text": "Kārtikī Pūrṇimā, Medan, 2091: Sunday 25 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": "2091-11-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-25", "confidence": "determinate" } ], "quote": "In Medan, Kārtikī Pūrṇimā 2091 falls on Sunday 25 November. Pūrṇimā runs from 08:25 on Sun 25 Nov to 10:45 on Mon 26 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/rasayatra", "festival": "rasayatra", "name": "Rāsayātrā", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28094, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-11-25T08:24:35+07:00", "utc": "2091-11-25T01:24:35Z", "ms": 3846792274671.604 }, "end": { "local": "2091-11-26T10:44:43+07:00", "utc": "2091-11-26T03:44:43Z", "ms": 3846887083244.33 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "2091-11-25T08:24:35+07:00", "utc": "2091-11-25T01:24:35Z", "ms": 3846792274671.604 }, "end": { "local": "2091-11-26T10:44:43+07:00", "utc": "2091-11-26T03:44:43Z", "ms": 3846887083244.33 } }, "kaala": "nishita", "days": [ { "local_date": "2091-11-24", "window": { "start": { "local": "2091-11-24T23:48:21+07:00", "utc": "2091-11-24T16:48:21Z", "ms": 3846761300961.343 }, "end": { "local": "2091-11-25T00:36:21+07:00", "utc": "2091-11-24T17:36:21Z", "ms": 3846764180961.343 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-11-25", "window": { "start": { "local": "2091-11-25T23:48:39+07:00", "utc": "2091-11-25T16:48:39Z", "ms": 3846847718969.815 }, "end": { "local": "2091-11-26T00:36:39+07:00", "utc": "2091-11-25T17:36:39Z", "ms": 3846850598969.815 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 08:25 on Sun 25 Nov to 10:45 on Mon 26 Nov.", "fact": "2091-11-25T01:24:35Z → 2091-11-26T03:44:43Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:48–00:36 on the 24th, 23:49–00:37 on the 25th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during niśītha. It covers 0 of 48 minutes on the 24th and 48 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 28094 s" }, { "step": "ruling", "text": "Rāsayātrā, Medan, 2091: Sunday 25 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": "2091-11-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-25", "confidence": "determinate" } ], "quote": "In Medan, Rāsayātrā 2091 falls on Sunday 25 November. Pūrṇimā runs from 08:25 on Sun 25 Nov to 10:45 on Mon 26 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-11-29", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-11-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15026, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-11-29T16:20:28+07:00", "utc": "2091-11-29T09:20:28Z", "ms": 3847166427927.5166 }, "end": { "local": "2091-11-30T17:34:16+07:00", "utc": "2091-11-30T10:34:16Z", "ms": 3847257256450.143 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-11-29T16:20:28+07:00", "utc": "2091-11-29T09:20:28Z", "ms": 3847166427927.5166 }, "end": { "local": "2091-11-30T17:34:16+07:00", "utc": "2091-11-30T10:34:16Z", "ms": 3847257256450.143 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-11-29", "window": { "start": { "local": "2091-11-29T20:54:07+07:00", "utc": "2091-11-29T13:54:07Z", "ms": 3847182847178.9717 }, "end": { "local": "2091-11-29T20:54:07+07:00", "utc": "2091-11-29T13:54:07Z", "ms": 3847182847178.9717 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-11-30", "window": { "start": { "local": "2091-11-30T21:44:43+07:00", "utc": "2091-11-30T14:44:43Z", "ms": 3847272282666.2354 }, "end": { "local": "2091-11-30T21:44:43+07:00", "utc": "2091-11-30T14:44:43Z", "ms": 3847272282666.2354 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 16:20 on Thu 29 Nov to 17:34 on Fri 30 Nov.", "fact": "2091-11-29T09:20:28Z → 2091-11-30T10:34:16Z" }, { "step": "kaala", "text": "Moonrise is at 20:54 on the 29th and 21:45 on the 30th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī 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. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15026 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Thursday 29 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": "2091-11-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-11-29", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Thursday 29 November. Caturthī runs from 16:20 on Thu 29 Nov to 17:34 on Fri 30 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-11-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/ekadashi?on=2091-12-07", "festival": "ekadashi", "name": "Utpannā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16039, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-12-06T13:33:30+07:00", "utc": "2091-12-06T06:33:30Z", "ms": 3847761209842.312 }, "end": { "local": "2091-12-07T10:46:42+07:00", "utc": "2091-12-07T03:46:42Z", "ms": 3847837602433.713 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-06T13:33:30+07:00", "utc": "2091-12-06T06:33:30Z", "ms": 3847761209842.312 }, "end": { "local": "2091-12-07T10:46:42+07:00", "utc": "2091-12-07T03:46:42Z", "ms": 3847837602433.713 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-12-06", "window": { "start": { "local": "2091-12-06T06:18:56+07:00", "utc": "2091-12-05T23:18:56Z", "ms": 3847735136322.902 }, "end": { "local": "2091-12-06T06:18:56+07:00", "utc": "2091-12-05T23:18:56Z", "ms": 3847735136322.902 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-12-07", "window": { "start": { "local": "2091-12-07T06:19:24+07:00", "utc": "2091-12-06T23:19:24Z", "ms": 3847821563659.531 }, "end": { "local": "2091-12-07T06:19:24+07:00", "utc": "2091-12-06T23:19:24Z", "ms": 3847821563659.531 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:33 on Thu 6 Dec to 10:47 on Fri 7 Dec.", "fact": "2091-12-06T06:33:30Z → 2091-12-07T03:46:42Z" }, { "step": "kaala", "text": "Sunrise is at 06:19 on the 6th and 06:19 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 16039 s" }, { "step": "ruling", "text": "Utpannā Ekādaśī, Medan, 2091: Friday 7 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": "2091-12-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-07", "confidence": "determinate" } ], "quote": "In Medan, Utpannā Ekādaśī 2091 falls on Friday 7 December. Ekādaśī runs from 13:33 on Thu 6 Dec to 10:47 on Fri 7 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-12-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/pradosha-vrata?on=2091-12-08", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29567, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-12-08T07:34:02+07:00", "utc": "2091-12-08T00:34:02Z", "ms": 3847912441598.507 }, "end": { "local": "2091-12-09T04:04:21+07:00", "utc": "2091-12-08T21:04:21Z", "ms": 3847986260889.874 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-08T07:34:02+07:00", "utc": "2091-12-08T00:34:02Z", "ms": 3847912441598.507 }, "end": { "local": "2091-12-09T04:04:21+07:00", "utc": "2091-12-08T21:04:21Z", "ms": 3847986260889.874 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-12-07", "window": { "start": { "local": "2091-12-07T18:14:26+07:00", "utc": "2091-12-07T11:14:26Z", "ms": 3847864465804.205 }, "end": { "local": "2091-12-07T19:51:09+07:00", "utc": "2091-12-07T12:51:09Z", "ms": 3847870269217.38 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "2091-12-08", "window": { "start": { "local": "2091-12-08T18:14:50+07:00", "utc": "2091-12-08T11:14:50Z", "ms": 3847950890331.1777 }, "end": { "local": "2091-12-08T19:51:34+07:00", "utc": "2091-12-08T12:51:34Z", "ms": 3847956694223.1284 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 07:34 on Sat 8 Dec to 04:04 on Sun 9 Dec.", "fact": "2091-12-08T00:34:02Z → 2091-12-08T21:04:21Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:14–19:51 on the 7th, 18:15–19:52 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 97 minutes on the 7th and 97 of 97 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 29567 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Medan, 2091: Saturday 8 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": "2091-12-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-08", "confidence": "determinate" } ], "quote": "In Medan, Kṛṣṇa Pradoṣa Vrata 2091 falls on Saturday 8 December. Trayodaśī runs from 07:34 on Sat 8 Dec to 04:04 on Sun 9 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-12-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/shivaratri?on=2091-12-09", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 848, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "2091-12-09T04:04:21+07:00", "utc": "2091-12-08T21:04:21Z", "ms": 3847986260889.874 }, "end": { "local": "2091-12-10T00:27:54+07:00", "utc": "2091-12-09T17:27:54Z", "ms": 3848059673799.2925 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-09T04:04:21+07:00", "utc": "2091-12-08T21:04:21Z", "ms": 3847986260889.874 }, "end": { "local": "2091-12-10T00:27:54+07:00", "utc": "2091-12-09T17:27:54Z", "ms": 3848059673799.2925 } }, "kaala": "nishita", "days": [ { "local_date": "2091-12-08", "window": { "start": { "local": "2091-12-08T23:53:35+07:00", "utc": "2091-12-08T16:53:35Z", "ms": 3847971214925.9937 }, "end": { "local": "2091-12-09T00:41:35+07:00", "utc": "2091-12-08T17:41:35Z", "ms": 3847974094925.9937 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-12-09", "window": { "start": { "local": "2091-12-09T23:54:02+07:00", "utc": "2091-12-09T16:54:02Z", "ms": 3848057641715.4077 }, "end": { "local": "2091-12-10T00:42:02+07:00", "utc": "2091-12-09T17:42:02Z", "ms": 3848060521715.4077 } }, "covered_min": 34, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 04:04 on Sun 9 Dec to 00:28 on Mon 10 Dec.", "fact": "2091-12-08T21:04:21Z → 2091-12-09T17:27:54Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:54–00:42 on the 8th, 23:54–00:42 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 34 of 48 on the 9th.", "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 848 s" }, { "step": "ruling", "text": "Śivarātri, Medan, 2091: Sunday 9 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": "2091-12-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-09", "confidence": "determinate" } ], "quote": "In Medan, Śivarātri 2091 falls on Sunday 9 December. Caturdaśī runs from 04:04 on Sun 9 Dec to 00:28 on Mon 10 Dec and covers 34 of 48 minutes of niśītha that night.", "cite": "https://ahargana.org/medan/festivals/2091/shivaratri?on=2091-12-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/vinayaka-chaturthi?on=2091-12-13", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 500, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-12-13T12:35:18+07:00", "utc": "2091-12-13T05:35:18Z", "ms": 3848362518031.342 }, "end": { "local": "2091-12-14T11:06:29+07:00", "utc": "2091-12-14T04:06:29Z", "ms": 3848443588942.077 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-13T12:35:18+07:00", "utc": "2091-12-13T05:35:18Z", "ms": 3848362518031.342 }, "end": { "local": "2091-12-14T11:06:29+07:00", "utc": "2091-12-14T04:06:29Z", "ms": 3848443588942.077 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-12-13", "window": { "start": { "local": "2091-12-13T11:55:38+07:00", "utc": "2091-12-13T04:55:38Z", "ms": 3848360138112.199 }, "end": { "local": "2091-12-13T12:43:38+07:00", "utc": "2091-12-13T05:43:38Z", "ms": 3848363018112.199 } }, "covered_min": 8, "window_min": 48, "qualifies": true }, { "local_date": "2091-12-14", "window": { "start": { "local": "2091-12-14T11:56:07+07:00", "utc": "2091-12-14T04:56:07Z", "ms": 3848446566625.095 }, "end": { "local": "2091-12-14T12:44:07+07:00", "utc": "2091-12-14T05:44:07Z", "ms": 3848449446625.095 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:35 on Thu 13 Dec to 11:06 on Fri 14 Dec.", "fact": "2091-12-13T05:35:18Z → 2091-12-14T04:06:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 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 8 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 500 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Medan, 2091: Thursday 13 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": "2091-12-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-13", "confidence": "boundary" } ], "quote": "In Medan, Vināyaka Caturthī 2091 falls on Thursday 13 December. Caturthī runs from 12:35 on Thu 13 Dec to 11:06 on Fri 14 Dec and covers 8 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/vinayaka-chaturthi?on=2091-12-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/naga-panchami-margashirsha", "festival": "naga-panchami-margashirsha", "name": "Nāga Pañcamī (Mārgaśīrṣa)", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2978, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "2091-12-14T11:06:29+07:00", "utc": "2091-12-14T04:06:29Z", "ms": 3848443588942.077 }, "end": { "local": "2091-12-15T10:27:51+07:00", "utc": "2091-12-15T03:27:51Z", "ms": 3848527671033.997 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-14T11:06:29+07:00", "utc": "2091-12-14T04:06:29Z", "ms": 3848443588942.077 }, "end": { "local": "2091-12-15T10:27:51+07:00", "utc": "2091-12-15T03:27:51Z", "ms": 3848527671033.997 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-12-14", "window": { "start": { "local": "2091-12-14T11:56:07+07:00", "utc": "2091-12-14T04:56:07Z", "ms": 3848446566625.095 }, "end": { "local": "2091-12-14T12:44:07+07:00", "utc": "2091-12-14T05:44:07Z", "ms": 3848449446625.095 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-12-15", "window": { "start": { "local": "2091-12-15T11:56:35+07:00", "utc": "2091-12-15T04:56:35Z", "ms": 3848532995409.3184 }, "end": { "local": "2091-12-15T12:44:35+07:00", "utc": "2091-12-15T05:44:35Z", "ms": 3848535875409.3184 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 11:06 on Fri 14 Dec to 10:28 on Sat 15 Dec.", "fact": "2091-12-14T04:06:29Z → 2091-12-15T03:27:51Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 14th, 11:57–12:45 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. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 2978 s" }, { "step": "ruling", "text": "Nāga Pañcamī (Mārgaśīrṣa), Medan, 2091: Friday 14 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": "2091-12-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-14", "confidence": "boundary" } ], "quote": "In Medan, Nāga Pañcamī (Mārgaśīrṣa) 2091 falls on Friday 14 December. Pañcamī runs from 11:06 on Fri 14 Dec to 10:28 on Sat 15 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/champa-shashthi", "festival": "champa-shashthi", "name": "Campā Ṣaṣṭhī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4562, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-12-15T10:27:51+07:00", "utc": "2091-12-15T03:27:51Z", "ms": 3848527671033.997 }, "end": { "local": "2091-12-16T10:41:02+07:00", "utc": "2091-12-16T03:41:02Z", "ms": 3848614862436.136 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-15T10:27:51+07:00", "utc": "2091-12-15T03:27:51Z", "ms": 3848527671033.997 }, "end": { "local": "2091-12-16T10:41:02+07:00", "utc": "2091-12-16T03:41:02Z", "ms": 3848614862436.136 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-12-15", "window": { "start": { "local": "2091-12-15T11:56:35+07:00", "utc": "2091-12-15T04:56:35Z", "ms": 3848532995409.3184 }, "end": { "local": "2091-12-15T12:44:35+07:00", "utc": "2091-12-15T05:44:35Z", "ms": 3848535875409.3184 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-12-16", "window": { "start": { "local": "2091-12-16T11:57:04+07:00", "utc": "2091-12-16T04:57:04Z", "ms": 3848619424430.384 }, "end": { "local": "2091-12-16T12:45:04+07:00", "utc": "2091-12-16T05:45:04Z", "ms": 3848622304430.384 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 10:28 on Sat 15 Dec to 10:41 on Sun 16 Dec.", "fact": "2091-12-15T03:27:51Z → 2091-12-16T03:41:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 15th, 11:57–12:45 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 48 of 48 minutes on the 15th and 0 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 4562 s" }, { "step": "ruling", "text": "Campā Ṣaṣṭhī, Medan, 2091: Saturday 15 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": "2091-12-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-15", "confidence": "determinate" } ], "quote": "In Medan, Campā Ṣaṣṭhī 2091 falls on Saturday 15 December. Ṣaṣṭhī runs from 10:28 on Sat 15 Dec to 10:41 on Sun 16 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/skanda-shashthi", "festival": "skanda-shashthi", "name": "Skanda Ṣaṣṭhī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4562, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "2091-12-15T10:27:51+07:00", "utc": "2091-12-15T03:27:51Z", "ms": 3848527671033.997 }, "end": { "local": "2091-12-16T10:41:02+07:00", "utc": "2091-12-16T03:41:02Z", "ms": 3848614862436.136 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-15T10:27:51+07:00", "utc": "2091-12-15T03:27:51Z", "ms": 3848527671033.997 }, "end": { "local": "2091-12-16T10:41:02+07:00", "utc": "2091-12-16T03:41:02Z", "ms": 3848614862436.136 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-12-15", "window": { "start": { "local": "2091-12-15T11:56:35+07:00", "utc": "2091-12-15T04:56:35Z", "ms": 3848532995409.3184 }, "end": { "local": "2091-12-15T12:44:35+07:00", "utc": "2091-12-15T05:44:35Z", "ms": 3848535875409.3184 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-12-16", "window": { "start": { "local": "2091-12-16T11:57:04+07:00", "utc": "2091-12-16T04:57:04Z", "ms": 3848619424430.384 }, "end": { "local": "2091-12-16T12:45:04+07:00", "utc": "2091-12-16T05:45:04Z", "ms": 3848622304430.384 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 10:28 on Sat 15 Dec to 10:41 on Sun 16 Dec.", "fact": "2091-12-15T03:27:51Z → 2091-12-16T03:41:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 15th, 11:57–12:45 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 48 of 48 minutes on the 15th and 0 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 4562 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī, Medan, 2091: Saturday 15 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": "2091-12-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-15", "confidence": "determinate" } ], "quote": "In Medan, Skanda Ṣaṣṭhī 2091 falls on Saturday 15 December. Ṣaṣṭhī runs from 10:28 on Sat 15 Dec to 10:41 on Sun 16 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/mitra-saptami", "festival": "mitra-saptami", "name": "Mitra Saptamī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 862, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "2091-12-16T10:41:02+07:00", "utc": "2091-12-16T03:41:02Z", "ms": 3848614862436.136 }, "end": { "local": "2091-12-17T11:43:12+07:00", "utc": "2091-12-17T04:43:12Z", "ms": 3848704991595.2705 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-16T10:41:02+07:00", "utc": "2091-12-16T03:41:02Z", "ms": 3848614862436.136 }, "end": { "local": "2091-12-17T11:43:12+07:00", "utc": "2091-12-17T04:43:12Z", "ms": 3848704991595.2705 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-12-16", "window": { "start": { "local": "2091-12-16T11:57:04+07:00", "utc": "2091-12-16T04:57:04Z", "ms": 3848619424430.384 }, "end": { "local": "2091-12-16T12:45:04+07:00", "utc": "2091-12-16T05:45:04Z", "ms": 3848622304430.384 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "2091-12-17", "window": { "start": { "local": "2091-12-17T11:57:34+07:00", "utc": "2091-12-17T04:57:34Z", "ms": 3848705853654.4204 }, "end": { "local": "2091-12-17T12:45:34+07:00", "utc": "2091-12-17T05:45:34Z", "ms": 3848708733654.4204 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 10:41 on Sun 16 Dec to 11:43 on Mon 17 Dec.", "fact": "2091-12-16T03:41:02Z → 2091-12-17T04:43:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 16th, 11:58–12:46 on the 17th.", "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 16th and 0 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: purvaviddha → only-day · margin 862 s" }, { "step": "ruling", "text": "Mitra Saptamī, Medan, 2091: Sunday 16 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": "2091-12-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-16", "confidence": "determinate" } ], "quote": "In Medan, Mitra Saptamī 2091 falls on Sunday 16 December. Saptamī runs from 10:41 on Sun 16 Dec to 11:43 on Mon 17 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/ekadashi?on=2091-12-21", "festival": "ekadashi", "name": "Mokṣadā Ekādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34693, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "2091-12-20T18:12:34+07:00", "utc": "2091-12-20T11:12:34Z", "ms": 3848987553544.014 }, "end": { "local": "2091-12-21T20:48:29+07:00", "utc": "2091-12-21T13:48:29Z", "ms": 3849083309494.0522 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-20T18:12:34+07:00", "utc": "2091-12-20T11:12:34Z", "ms": 3848987553544.014 }, "end": { "local": "2091-12-21T20:48:29+07:00", "utc": "2091-12-21T13:48:29Z", "ms": 3849083309494.0522 } }, "kaala": "sunrise", "days": [ { "local_date": "2091-12-21", "window": { "start": { "local": "2091-12-21T06:26:13+07:00", "utc": "2091-12-20T23:26:13Z", "ms": 3849031572998.4717 }, "end": { "local": "2091-12-21T06:26:13+07:00", "utc": "2091-12-20T23:26:13Z", "ms": 3849031572998.4717 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "2091-12-22", "window": { "start": { "local": "2091-12-22T06:26:43+07:00", "utc": "2091-12-21T23:26:43Z", "ms": 3849118002727.98 }, "end": { "local": "2091-12-22T06:26:43+07:00", "utc": "2091-12-21T23:26:43Z", "ms": 3849118002727.98 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:13 on Thu 20 Dec to 20:48 on Fri 21 Dec.", "fact": "2091-12-20T11:12:34Z → 2091-12-21T13:48:29Z" }, { "step": "kaala", "text": "Sunrise is at 06:26 on the 21st and 06:27 on the 22nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 21st and is not on the 22nd.", "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 34693 s" }, { "step": "ruling", "text": "Mokṣadā Ekādaśī, Medan, 2091: Friday 21 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": "2091-12-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-21", "confidence": "determinate" } ], "quote": "In Medan, Mokṣadā Ekādaśī 2091 falls on Friday 21 December. Ekādaśī runs from 18:13 on Thu 20 Dec to 20:48 on Fri 21 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/ekadashi?on=2091-12-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/akhanda-dvadashi", "festival": "akhanda-dvadashi", "name": "Akhaṇḍa Dvādaśī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28858, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "2091-12-21T20:48:29+07:00", "utc": "2091-12-21T13:48:29Z", "ms": 3849083309494.0522 }, "end": { "local": "2091-12-22T23:17:50+07:00", "utc": "2091-12-22T16:17:50Z", "ms": 3849178670476.017 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-21T20:48:29+07:00", "utc": "2091-12-21T13:48:29Z", "ms": 3849083309494.0522 }, "end": { "local": "2091-12-22T23:17:50+07:00", "utc": "2091-12-22T16:17:50Z", "ms": 3849178670476.017 } }, "kaala": "madhyahna", "days": [ { "local_date": "2091-12-21", "window": { "start": { "local": "2091-12-21T11:59:32+07:00", "utc": "2091-12-21T04:59:32Z", "ms": 3849051571917.37 }, "end": { "local": "2091-12-21T12:47:32+07:00", "utc": "2091-12-21T05:47:32Z", "ms": 3849054451917.37 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "2091-12-22", "window": { "start": { "local": "2091-12-22T12:00:02+07:00", "utc": "2091-12-22T05:00:02Z", "ms": 3849138001661.788 }, "end": { "local": "2091-12-22T12:48:02+07:00", "utc": "2091-12-22T05:48:02Z", "ms": 3849140881661.788 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 20:48 on Fri 21 Dec to 23:18 on Sat 22 Dec.", "fact": "2091-12-21T13:48:29Z → 2091-12-22T16:17:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:00–12:48 on the 21st, 12:00–12:48 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. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 28858 s" }, { "step": "ruling", "text": "Akhaṇḍa Dvādaśī, Medan, 2091: Saturday 22 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": "2091-12-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-22", "confidence": "determinate" } ], "quote": "In Medan, Akhaṇḍa Dvādaśī 2091 falls on Saturday 22 December. Dvādaśī runs from 20:48 on Fri 21 Dec to 23:18 on Sat 22 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/pradosha-vrata?on=2091-12-23", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11983, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "2091-12-22T23:17:50+07:00", "utc": "2091-12-22T16:17:50Z", "ms": 3849178670476.017 }, "end": { "local": "2091-12-24T01:32:35+07:00", "utc": "2091-12-23T18:32:35Z", "ms": 3849273155399.69 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-22T23:17:50+07:00", "utc": "2091-12-22T16:17:50Z", "ms": 3849178670476.017 }, "end": { "local": "2091-12-24T01:32:35+07:00", "utc": "2091-12-23T18:32:35Z", "ms": 3849273155399.69 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-12-22", "window": { "start": { "local": "2091-12-22T18:21:21+07:00", "utc": "2091-12-22T11:21:21Z", "ms": 3849160880595.5957 }, "end": { "local": "2091-12-22T19:58:07+07:00", "utc": "2091-12-22T12:58:07Z", "ms": 3849166687495.4683 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "2091-12-23", "window": { "start": { "local": "2091-12-23T18:21:50+07:00", "utc": "2091-12-23T11:21:50Z", "ms": 3849247310482.4106 }, "end": { "local": "2091-12-23T19:58:37+07:00", "utc": "2091-12-23T12:58:37Z", "ms": 3849253117327.0195 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 23:18 on Sat 22 Dec to 01:33 on Mon 24 Dec.", "fact": "2091-12-22T16:17:50Z → 2091-12-23T18:32:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:21–19:58 on the 22nd, 18:22–19:59 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 0 of 97 minutes on the 22nd and 97 of 97 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 11983 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Medan, 2091: Sunday 23 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": "2091-12-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-23", "confidence": "determinate" } ], "quote": "In Medan, Śukla Pradoṣa Vrata 2091 falls on Sunday 23 December. Trayodaśī runs from 23:18 on Sat 22 Dec to 01:33 on Mon 24 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/pradosha-vrata?on=2091-12-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/medan/festivals/2091/dattatreyotpatti", "festival": "dattatreyotpatti", "name": "Dattātreyotpatti", "everyday": "Datta Jayanti", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26922, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "2091-12-25T03:27:49+07:00", "utc": "2091-12-24T20:27:49Z", "ms": 3849366469435.906 }, "end": { "local": "2091-12-26T05:01:09+07:00", "utc": "2091-12-25T22:01:09Z", "ms": 3849458469491.617 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-25T03:27:49+07:00", "utc": "2091-12-24T20:27:49Z", "ms": 3849366469435.906 }, "end": { "local": "2091-12-26T05:01:09+07:00", "utc": "2091-12-25T22:01:09Z", "ms": 3849458469491.617 } }, "kaala": "pradosha", "days": [ { "local_date": "2091-12-24", "window": { "start": { "local": "2091-12-24T18:22:20+07:00", "utc": "2091-12-24T11:22:20Z", "ms": 3849333740465.268 }, "end": { "local": "2091-12-24T19:59:07+07:00", "utc": "2091-12-24T12:59:07Z", "ms": 3849339547218.439 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "2091-12-25", "window": { "start": { "local": "2091-12-25T18:22:51+07:00", "utc": "2091-12-25T11:22:51Z", "ms": 3849420170513.056 }, "end": { "local": "2091-12-25T19:59:37+07:00", "utc": "2091-12-25T12:59:37Z", "ms": 3849425977138.706 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 03:28 on Tue 25 Dec to 05:01 on Wed 26 Dec.", "fact": "2091-12-24T20:27:49Z → 2091-12-25T22:01:09Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:22–19:59 on the 24th, 18:23–20:00 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 0 of 97 minutes on the 24th and 97 of 97 on the 25th.", "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 26922 s" }, { "step": "ruling", "text": "Dattātreyotpatti, Medan, 2091: Tuesday 25 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": "2091-12-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-25", "confidence": "determinate" } ], "quote": "In Medan, Dattātreyotpatti (Datta Jayanti) 2091 falls on Tuesday 25 December. Pūrṇimā runs from 03:28 on Tue 25 Dec to 05:01 on Wed 26 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/medan/festivals/2091/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": "/medan/festivals/2091/sankashta-chaturthi?on=2091-12-29", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1214520", "year": 2091, "local_date": "2091-12-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36116, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "2091-12-29T07:24:36+07:00", "utc": "2091-12-29T00:24:36Z", "ms": 3849726275509.9395 }, "end": { "local": "2091-12-30T07:25:54+07:00", "utc": "2091-12-30T00:25:54Z", "ms": 3849812753763.4844 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "2091-12-29T07:24:36+07:00", "utc": "2091-12-29T00:24:36Z", "ms": 3849726275509.9395 }, "end": { "local": "2091-12-30T07:25:54+07:00", "utc": "2091-12-30T00:25:54Z", "ms": 3849812753763.4844 } }, "kaala": "moonrise", "days": [ { "local_date": "2091-12-28", "window": { "start": { "local": "2091-12-28T20:32:39+07:00", "utc": "2091-12-28T13:32:39Z", "ms": 3849687159489.553 }, "end": { "local": "2091-12-28T20:32:39+07:00", "utc": "2091-12-28T13:32:39Z", "ms": 3849687159489.553 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "2091-12-29", "window": { "start": { "local": "2091-12-29T21:23:58+07:00", "utc": "2091-12-29T14:23:58Z", "ms": 3849776637751.4346 }, "end": { "local": "2091-12-29T21:23:58+07:00", "utc": "2091-12-29T14:23:58Z", "ms": 3849776637751.4346 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 07:25 on Sat 29 Dec to 07:26 on Sun 30 Dec.", "fact": "2091-12-29T00:24:36Z → 2091-12-30T00:25:54Z" }, { "step": "kaala", "text": "Moonrise is at 20:33 on the 28th and 21:24 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 36116 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Medan, 2091: Saturday 29 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": "2091-12-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "2091-12-29", "confidence": "determinate" } ], "quote": "In Medan, Saṅkaṣṭa Caturthī 2091 falls on Saturday 29 December. Caturthī runs from 07:25 on Sat 29 Dec to 07:26 on Sun 30 Dec and is current at moonrise that day.", "cite": "https://ahargana.org/medan/festivals/2091/sankashta-chaturthi?on=2091-12-29", "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" } }