{ "id": "/zunyi/festivals/1980", "place": { "id": "1783621", "slug": "zunyi", "name": "Zunyi", "region": "Guizhou, China", "country": "CN", "lat": 27.68667, "lon": 106.90722, "elevation_m": 867, "tz": "Asia/Shanghai" }, "year": 1980, "tradition": "smarta", "method": "pac-rp@2026.1", "ruleset": "2026.3-draft", "rulings": [ { "id": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-01-05", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-05", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 1727, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-01-05T20:29:19+08:00", "utc": "1980-01-05T12:29:19Z", "ms": 315923359105.70197 }, "end": { "local": "1980-01-06T22:42:39+08:00", "utc": "1980-01-06T14:42:39Z", "ms": 316017758744.46735 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-05T20:29:19+08:00", "utc": "1980-01-05T12:29:19Z", "ms": 315923359105.70197 }, "end": { "local": "1980-01-06T22:42:39+08:00", "utc": "1980-01-06T14:42:39Z", "ms": 316017758744.46735 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-01-05", "window": { "start": { "local": "1980-01-05T20:58:07+08:00", "utc": "1980-01-05T12:58:07Z", "ms": 315925086522.4603 }, "end": { "local": "1980-01-05T20:58:07+08:00", "utc": "1980-01-05T12:58:07Z", "ms": 315925086522.4603 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-01-06", "window": { "start": { "local": "1980-01-06T21:50:27+08:00", "utc": "1980-01-06T13:50:27Z", "ms": 316014626827.5402 }, "end": { "local": "1980-01-06T21:50:27+08:00", "utc": "1980-01-06T13:50:27Z", "ms": 316014626827.5402 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturthī runs from 20:29 on Sat 5 Jan to 22:43 on Sun 6 Jan.", "fact": "1980-01-05T12:29:19Z → 1980-01-06T14:42:39Z" }, { "step": "kaala", "text": "Moonrise is at 20:58 on the 5th and 21:50 on the 6th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 5th and is on the 6th.", "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 1727 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Saturday 5 January.", "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": "1980-01-05", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-05", "confidence": "boundary" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Saturday 5 January. Caturthī runs from 20:29 on Sat 5 Jan to 22:43 on Sun 6 Jan and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-01-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/bhogi", "festival": "bhogi", "name": "Bhogi", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15006, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-02-13T11:26:23+08:00", "utc": "1980-02-13T03:26:23Z", "ms": 319260383436.2208 } }, "span": { "of": "transit", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 } }, "kaala": "sunset-day", "days": [ { "local_date": "1980-01-14", "window": { "start": { "local": "1980-01-13T18:16:45+08:00", "utc": "1980-01-13T10:16:45Z", "ms": 316606604922.76984 }, "end": { "local": "1980-01-14T18:17:32+08:00", "utc": "1980-01-14T10:17:32Z", "ms": 316693052424.6493 } }, "covered_min": 0, "window_min": 1441, "qualifies": false }, { "local_date": "1980-01-15", "window": { "start": { "local": "1980-01-14T18:17:32+08:00", "utc": "1980-01-14T10:17:32Z", "ms": 316693052424.6493 }, "end": { "local": "1980-01-15T18:18:20+08:00", "utc": "1980-01-15T10:18:20Z", "ms": 316779500242.83386 } }, "covered_min": 1, "window_min": 1441, "qualifies": true } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1980-01-15", "days": -1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 22:28 on Mon 14 Jan.", "fact": "1980-01-14T14:27:39Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 18:18, and the day of the 15th ends at 18:18.", "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 15006 s" }, { "step": "counted", "text": "Bhogi is kept the day before Pongal: Tuesday 15 January is the day taken above.", "fact": "follows: pongal − 1 d" }, { "step": "ruling", "text": "Bhogi, Zunyi, 1980: Monday 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": "1980-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1980-01-13", "statement": "Counted from midnight", "reference": { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1980-01-13", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } } ], "quote": "In Zunyi, Bhogi 1980 falls on Monday 14 January. It is kept the day before Pongal, which falls on Tuesday 15 January. The Sun enters Makara at 22:28 on Mon 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 14th and the 15th. Counted from midnight, or counted from sunrise, as in Orissa, it is 13 January.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/makara-sankranti", "festival": "makara-sankranti", "name": "Makara Saṅkrānti", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5541, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-02-13T11:26:23+08:00", "utc": "1980-02-13T03:26:23Z", "ms": 319260383436.2208 } }, "span": { "of": "transit", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 } }, "kaala": "civil-day", "days": [ { "local_date": "1980-01-14", "window": { "start": { "local": "1980-01-14T00:00:00+08:00", "utc": "1980-01-13T16:00:00Z", "ms": 316627200000 }, "end": { "local": "1980-01-15T00:00:00+08:00", "utc": "1980-01-14T16:00:00Z", "ms": 316713600000 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "1980-01-15", "window": { "start": { "local": "1980-01-15T00:00:00+08:00", "utc": "1980-01-14T16:00:00Z", "ms": 316713600000 }, "end": { "local": "1980-01-16T00:00:00+08:00", "utc": "1980-01-15T16:00:00Z", "ms": 316800000000 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 22:28 on Mon 14 Jan.", "fact": "1980-01-14T14:27:39Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from midnight to midnight, on the clock of Zunyi.", "fact": "civil-day: midnight-to-midnight · Asia/Shanghai" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from midnight. The transit falls on the 14th, not the 15th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from midnight → only-day · margin 5541 s" }, { "step": "ruling", "text": "Makara Saṅkrānti, Zunyi, 1980: Monday 14 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "makara-sankranti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } ], "rashi": "Makara", "day_from": "midnight" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1980-01-14", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } }, { "kind": "reckoning", "id": "sunset-rule", "local_date": "1980-01-15", "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 Zunyi, Makara Saṅkrānti 1980 falls on Monday 14 January. The Sun enters Makara at 22:28 on Mon 14 Jan, and the rule counts the day from midnight. 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 January.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-01-14", "festival": "ekadashi", "name": "Ṣaṭtilā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13629, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-01-13T11:32:00+08:00", "utc": "1980-01-13T03:32:00Z", "ms": 316582319938.75793 }, "end": { "local": "1980-01-14T11:41:22+08:00", "utc": "1980-01-14T03:41:22Z", "ms": 316669282038.03424 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-13T11:32:00+08:00", "utc": "1980-01-13T03:32:00Z", "ms": 316582319938.75793 }, "end": { "local": "1980-01-14T11:41:22+08:00", "utc": "1980-01-14T03:41:22Z", "ms": 316669282038.03424 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-01-13", "window": { "start": { "local": "1980-01-13T07:44:51+08:00", "utc": "1980-01-12T23:44:51Z", "ms": 316568690716.9197 }, "end": { "local": "1980-01-13T07:44:51+08:00", "utc": "1980-01-12T23:44:51Z", "ms": 316568690716.9197 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-01-14", "window": { "start": { "local": "1980-01-14T07:44:49+08:00", "utc": "1980-01-13T23:44:49Z", "ms": 316655089205.40717 }, "end": { "local": "1980-01-14T07:44:49+08:00", "utc": "1980-01-13T23:44:49Z", "ms": 316655089205.40717 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:32 on Sun 13 Jan to 11:41 on Mon 14 Jan.", "fact": "1980-01-13T03:32:00Z → 1980-01-14T03:41:22Z" }, { "step": "kaala", "text": "Sunrise is at 07:45 on the 13th and 07:45 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 13629 s" }, { "step": "ruling", "text": "Ṣaṭtilā Ekādaśī, Zunyi, 1980: Monday 14 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": "1980-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-14", "confidence": "determinate" } ], "quote": "In Zunyi, Ṣaṭtilā Ekādaśī 1980 falls on Monday 14 January. Ekādaśī runs from 11:32 on Sun 13 Jan to 11:41 on Mon 14 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-01-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pongal", "festival": "pongal", "name": "Pongal", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15006, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-02-13T11:26:23+08:00", "utc": "1980-02-13T03:26:23Z", "ms": 319260383436.2208 } }, "span": { "of": "transit", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 } }, "kaala": "sunset-day", "days": [ { "local_date": "1980-01-14", "window": { "start": { "local": "1980-01-13T18:16:45+08:00", "utc": "1980-01-13T10:16:45Z", "ms": 316606604922.76984 }, "end": { "local": "1980-01-14T18:17:32+08:00", "utc": "1980-01-14T10:17:32Z", "ms": 316693052424.6493 } }, "covered_min": 0, "window_min": 1441, "qualifies": false }, { "local_date": "1980-01-15", "window": { "start": { "local": "1980-01-14T18:17:32+08:00", "utc": "1980-01-14T10:17:32Z", "ms": 316693052424.6493 }, "end": { "local": "1980-01-15T18:18:20+08:00", "utc": "1980-01-15T10:18:20Z", "ms": 316779500242.83386 } }, "covered_min": 1, "window_min": 1441, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 22:28 on Mon 14 Jan.", "fact": "1980-01-14T14:27:39Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 18:18, and the day of the 15th ends at 18:18.", "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 15006 s" }, { "step": "ruling", "text": "Pongal, Zunyi, 1980: Tuesday 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": "1980-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-15", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1980-01-14", "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": "1980-01-14", "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 Zunyi, Pongal 1980 falls on Tuesday 15 January. The Sun enters Makara at 22:28 on Mon 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 14th and the 15th. Counted from midnight, or counted from sunrise, as in Orissa, it is 14 January.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-01-15", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26098, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-01-15T11:03:22+08:00", "utc": "1980-01-15T03:03:22Z", "ms": 316753401981.9773 }, "end": { "local": "1980-01-16T09:42:15+08:00", "utc": "1980-01-16T01:42:15Z", "ms": 316834934576.3034 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-15T11:03:22+08:00", "utc": "1980-01-15T03:03:22Z", "ms": 316753401981.9773 }, "end": { "local": "1980-01-16T09:42:15+08:00", "utc": "1980-01-16T01:42:15Z", "ms": 316834934576.3034 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-01-15", "window": { "start": { "local": "1980-01-15T18:18:20+08:00", "utc": "1980-01-15T10:18:20Z", "ms": 316779500242.83386 }, "end": { "local": "1980-01-15T20:05:51+08:00", "utc": "1980-01-15T12:05:51Z", "ms": 316785951075.2709 } }, "covered_min": 108, "window_min": 108, "qualifies": true }, { "local_date": "1980-01-16", "window": { "start": { "local": "1980-01-16T18:19:08+08:00", "utc": "1980-01-16T10:19:08Z", "ms": 316865948334.782 }, "end": { "local": "1980-01-16T20:06:32+08:00", "utc": "1980-01-16T12:06:32Z", "ms": 316872391926.46783 } }, "covered_min": 0, "window_min": 107, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:03 on Tue 15 Jan to 09:42 on Wed 16 Jan.", "fact": "1980-01-15T03:03:22Z → 1980-01-16T01:42:15Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:18–20:06 on the 15th, 18:19–20:07 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 108 of 108 minutes on the 15th and 0 of 107 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 26098 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Tuesday 15 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": "1980-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-15", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Tuesday 15 January. Trayodaśī runs from 11:03 on Tue 15 Jan to 09:42 on Wed 16 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-01-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/mattu-pongal", "festival": "mattu-pongal", "name": "Mattu Pongal", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15006, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-02-13T11:26:23+08:00", "utc": "1980-02-13T03:26:23Z", "ms": 319260383436.2208 } }, "span": { "of": "transit", "start": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 }, "end": { "local": "1980-01-14T22:27:39+08:00", "utc": "1980-01-14T14:27:39Z", "ms": 316708058774.0577 } }, "kaala": "sunset-day", "days": [ { "local_date": "1980-01-14", "window": { "start": { "local": "1980-01-13T18:16:45+08:00", "utc": "1980-01-13T10:16:45Z", "ms": 316606604922.76984 }, "end": { "local": "1980-01-14T18:17:32+08:00", "utc": "1980-01-14T10:17:32Z", "ms": 316693052424.6493 } }, "covered_min": 0, "window_min": 1441, "qualifies": false }, { "local_date": "1980-01-15", "window": { "start": { "local": "1980-01-14T18:17:32+08:00", "utc": "1980-01-14T10:17:32Z", "ms": 316693052424.6493 }, "end": { "local": "1980-01-15T18:18:20+08:00", "utc": "1980-01-15T10:18:20Z", "ms": 316779500242.83386 } }, "covered_min": 1, "window_min": 1441, "qualifies": true } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1980-01-15", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 22:28 on Mon 14 Jan.", "fact": "1980-01-14T14:27:39Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 18:18, and the day of the 15th ends at 18:18.", "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 15006 s" }, { "step": "counted", "text": "Mattu Pongal is kept the day after Pongal: Tuesday 15 January is the day taken above.", "fact": "follows: pongal + 1 d" }, { "step": "ruling", "text": "Mattu Pongal, Zunyi, 1980: Wednesday 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": "1980-01-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-16", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1980-01-15", "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": "1980-01-15", "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 Zunyi, Mattu Pongal 1980 falls on Wednesday 16 January. It is kept the day after Pongal, which falls on Tuesday 15 January. The Sun enters Makara at 22:28 on Mon 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 14th and the 15th. Counted from midnight, or counted from sunrise, as in Orissa, it is 15 January.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/shivaratri?on=1980-01-16", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22737, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-01-16T09:42:15+08:00", "utc": "1980-01-16T01:42:15Z", "ms": 316834934576.3034 }, "end": { "local": "1980-01-17T07:44:49+08:00", "utc": "1980-01-16T23:44:49Z", "ms": 316914288865.5591 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-16T09:42:15+08:00", "utc": "1980-01-16T01:42:15Z", "ms": 316834934576.3034 }, "end": { "local": "1980-01-17T07:44:49+08:00", "utc": "1980-01-16T23:44:49Z", "ms": 316914288865.5591 } }, "kaala": "nishita", "days": [ { "local_date": "1980-01-15", "window": { "start": { "local": "1980-01-16T00:37:31+08:00", "utc": "1980-01-15T16:37:31Z", "ms": 316802250864.4726 }, "end": { "local": "1980-01-16T01:25:31+08:00", "utc": "1980-01-15T17:25:31Z", "ms": 316805130864.4726 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-01-16", "window": { "start": { "local": "1980-01-17T00:37:52+08:00", "utc": "1980-01-16T16:37:52Z", "ms": 316888671803.6039 }, "end": { "local": "1980-01-17T01:25:52+08:00", "utc": "1980-01-16T17:25:52Z", "ms": 316891551803.6039 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 09:42 on Wed 16 Jan to 07:45 on Thu 17 Jan.", "fact": "1980-01-16T01:42:15Z → 1980-01-16T23:44:49Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:38–01:26 on the 15th, 00:38–01:26 on the 16th.", "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 15th and 48 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 22737 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Wednesday 16 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": "1980-01-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-16", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Wednesday 16 January. Caturdaśī runs from 09:42 on Wed 16 Jan to 07:45 on Thu 17 Jan and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-01-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/yama-tarpana", "festival": "yama-tarpana", "name": "Yama Tarpaṇa", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-17", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 14, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-01-16T09:42:15+08:00", "utc": "1980-01-16T01:42:15Z", "ms": 316834934576.3034 }, "end": { "local": "1980-01-17T07:44:49+08:00", "utc": "1980-01-16T23:44:49Z", "ms": 316914288865.5591 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-16T09:42:15+08:00", "utc": "1980-01-16T01:42:15Z", "ms": 316834934576.3034 }, "end": { "local": "1980-01-17T07:44:49+08:00", "utc": "1980-01-16T23:44:49Z", "ms": 316914288865.5591 } }, "kaala": "arunodaya", "days": [ { "local_date": "1980-01-16", "window": { "start": { "local": "1980-01-16T05:57:11+08:00", "utc": "1980-01-15T21:57:11Z", "ms": 316821430653.6743 }, "end": { "local": "1980-01-16T07:44:41+08:00", "utc": "1980-01-15T23:44:41Z", "ms": 316827881486.1113 } }, "covered_min": 0, "window_min": 108, "qualifies": false }, { "local_date": "1980-01-17", "window": { "start": { "local": "1980-01-17T05:57:12+08:00", "utc": "1980-01-16T21:57:12Z", "ms": 316907831680.73987 }, "end": { "local": "1980-01-17T07:44:35+08:00", "utc": "1980-01-16T23:44:35Z", "ms": 316914275272.4257 } }, "covered_min": 107, "window_min": 107, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 09:42 on Wed 16 Jan to 07:45 on Thu 17 Jan.", "fact": "1980-01-16T01:42:15Z → 1980-01-16T23:44:49Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:57–07:45 on the 16th, 05:57–07:45 on the 17th.", "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 108 minutes on the 16th and 107 of 107 on the 17th.", "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 14 s < 300 s" }, { "step": "ruling", "text": "Yama Tarpaṇa, Zunyi, 1980: Thursday 17 January.", "fact": "confidence: boundary (margin)" } ], "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": "1980-01-17", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-17", "confidence": "boundary" } ], "quote": "In Zunyi, Yama Tarpaṇa 1980 falls on Thursday 17 January. Caturdaśī runs from 09:42 on Wed 16 Jan to 07:45 on Thu 17 Jan and covers all of aruṇodaya that dawn. It is 0 min 14 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/tila-chaturthi", "festival": "tila-chaturthi", "name": "Tila Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-20", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 1868, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-01-20T20:43:16+08:00", "utc": "1980-01-20T12:43:16Z", "ms": 317220195979.94495 }, "end": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-20T20:43:16+08:00", "utc": "1980-01-20T12:43:16Z", "ms": 317220195979.94495 }, "end": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-01-20", "window": { "start": { "local": "1980-01-20T18:22:23+08:00", "utc": "1980-01-20T10:22:23Z", "ms": 317211742585.8517 }, "end": { "local": "1980-01-20T20:09:15+08:00", "utc": "1980-01-20T12:09:15Z", "ms": 317218154865.2187 } }, "covered_min": 0, "window_min": 107, "qualifies": false }, { "local_date": "1980-01-21", "window": { "start": { "local": "1980-01-21T18:23:11+08:00", "utc": "1980-01-21T10:23:11Z", "ms": 317298191411.72455 }, "end": { "local": "1980-01-21T20:09:55+08:00", "utc": "1980-01-21T12:09:55Z", "ms": 317304595303.5762 } }, "covered_min": 0, "window_min": 107, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 20:43 on Sun 20 Jan to 17:52 on Mon 21 Jan.", "fact": "1980-01-20T12:43:16Z → 1980-01-21T09:52:04Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:22–20:09 on the 20th, 18:23–20:10 on the 21st.", "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 107 minutes on the 20th and 0 of 107 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Neither evening qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 1868 s" }, { "step": "ruling", "text": "Tila Caturthī, Zunyi, 1980: Sunday 20 January.", "fact": "confidence: boundary (absent-unstated)" } ], "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": "1980-01-20", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-20", "confidence": "determinate" } ], "quote": "In Zunyi, Tila Caturthī 1980 falls on Sunday 20 January. Caturthī runs from 20:43 on Sun 20 Jan to 17:52 on Mon 21 Jan, and reaches pradoṣa on neither day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ganesha-jayanti", "festival": "ganesha-jayanti", "name": "Gaṇeśa Jayantī", "everyday": "Maghi Ganesh Jayanti", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15871, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-01-20T20:43:16+08:00", "utc": "1980-01-20T12:43:16Z", "ms": 317220195979.94495 }, "end": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-20T20:43:16+08:00", "utc": "1980-01-20T12:43:16Z", "ms": 317220195979.94495 }, "end": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-01-20", "window": { "start": { "local": "1980-01-20T12:39:15+08:00", "utc": "1980-01-20T04:39:15Z", "ms": 317191154888.1906 }, "end": { "local": "1980-01-20T13:27:15+08:00", "utc": "1980-01-20T05:27:15Z", "ms": 317194034888.1906 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-01-21", "window": { "start": { "local": "1980-01-21T12:39:33+08:00", "utc": "1980-01-21T04:39:33Z", "ms": 317277573046.41437 }, "end": { "local": "1980-01-21T13:27:33+08:00", "utc": "1980-01-21T05:27:33Z", "ms": 317280453046.41437 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 20:43 on Sun 20 Jan to 17:52 on Mon 21 Jan.", "fact": "1980-01-20T12:43:16Z → 1980-01-21T09:52:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:39–13:27 on the 20th, 12:40–13:28 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 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. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 15871 s" }, { "step": "ruling", "text": "Gaṇeśa Jayantī, Zunyi, 1980: Monday 21 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": "1980-01-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-21", "confidence": "determinate" } ], "quote": "In Zunyi, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1980 falls on Monday 21 January. Caturthī runs from 20:43 on Sun 20 Jan to 17:52 on Mon 21 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/shri-panchami", "festival": "shri-panchami", "name": "Śrī Pañcamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6299, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 }, "end": { "local": "1980-01-22T15:12:49+08:00", "utc": "1980-01-22T07:12:49Z", "ms": 317373168952.33203 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 }, "end": { "local": "1980-01-22T15:12:49+08:00", "utc": "1980-01-22T07:12:49Z", "ms": 317373168952.33203 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-01-21", "window": { "start": { "local": "1980-01-21T12:39:33+08:00", "utc": "1980-01-21T04:39:33Z", "ms": 317277573046.41437 }, "end": { "local": "1980-01-21T13:27:33+08:00", "utc": "1980-01-21T05:27:33Z", "ms": 317280453046.41437 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-01-22", "window": { "start": { "local": "1980-01-22T12:39:50+08:00", "utc": "1980-01-22T04:39:50Z", "ms": 317363990432.91113 }, "end": { "local": "1980-01-22T13:27:50+08:00", "utc": "1980-01-22T05:27:50Z", "ms": 317366870432.91113 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 17:52 on Mon 21 Jan to 15:13 on Tue 22 Jan.", "fact": "1980-01-21T09:52:04Z → 1980-01-22T07:12:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:40–13:28 on the 21st, 12:40–13:28 on the 22nd.", "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 21st and 48 of 48 on the 22nd.", "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 6299 s" }, { "step": "ruling", "text": "Śrī Pañcamī, Zunyi, 1980: Tuesday 22 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": "1980-01-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-22", "confidence": "determinate" } ], "quote": "In Zunyi, Śrī Pañcamī 1980 falls on Tuesday 22 January. Pañcamī runs from 17:52 on Mon 21 Jan to 15:13 on Tue 22 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vasanta-panchami", "festival": "vasanta-panchami", "name": "Vasanta Pañcamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6299, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 }, "end": { "local": "1980-01-22T15:12:49+08:00", "utc": "1980-01-22T07:12:49Z", "ms": 317373168952.33203 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-21T17:52:04+08:00", "utc": "1980-01-21T09:52:04Z", "ms": 317296323672.40027 }, "end": { "local": "1980-01-22T15:12:49+08:00", "utc": "1980-01-22T07:12:49Z", "ms": 317373168952.33203 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-01-21", "window": { "start": { "local": "1980-01-21T12:39:33+08:00", "utc": "1980-01-21T04:39:33Z", "ms": 317277573046.41437 }, "end": { "local": "1980-01-21T13:27:33+08:00", "utc": "1980-01-21T05:27:33Z", "ms": 317280453046.41437 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-01-22", "window": { "start": { "local": "1980-01-22T12:39:50+08:00", "utc": "1980-01-22T04:39:50Z", "ms": 317363990432.91113 }, "end": { "local": "1980-01-22T13:27:50+08:00", "utc": "1980-01-22T05:27:50Z", "ms": 317366870432.91113 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 17:52 on Mon 21 Jan to 15:13 on Tue 22 Jan.", "fact": "1980-01-21T09:52:04Z → 1980-01-22T07:12:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:40–13:28 on the 21st, 12:40–13:28 on the 22nd.", "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 21st and 48 of 48 on the 22nd.", "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 6299 s" }, { "step": "ruling", "text": "Vasanta Pañcamī, Zunyi, 1980: Tuesday 22 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": "1980-01-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-22", "confidence": "determinate" } ], "quote": "In Zunyi, Vasanta Pañcamī 1980 falls on Tuesday 22 January. Pañcamī runs from 17:52 on Mon 21 Jan to 15:13 on Tue 22 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ratha-saptami", "festival": "ratha-saptami", "name": "Ratha Saptamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11199, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1980-01-23T12:50:44+08:00", "utc": "1980-01-23T04:50:44Z", "ms": 317451044122.0552 }, "end": { "local": "1980-01-24T10:49:46+08:00", "utc": "1980-01-24T02:49:46Z", "ms": 317530186276.69336 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-23T12:50:44+08:00", "utc": "1980-01-23T04:50:44Z", "ms": 317451044122.0552 }, "end": { "local": "1980-01-24T10:49:46+08:00", "utc": "1980-01-24T02:49:46Z", "ms": 317530186276.69336 } }, "kaala": "arunodaya", "days": [ { "local_date": "1980-01-23", "window": { "start": { "local": "1980-01-23T05:56:50+08:00", "utc": "1980-01-22T21:56:50Z", "ms": 317426209662.67505 }, "end": { "local": "1980-01-23T07:43:25+08:00", "utc": "1980-01-22T23:43:25Z", "ms": 317432604954.59265 } }, "covered_min": 0, "window_min": 107, "qualifies": false }, { "local_date": "1980-01-24", "window": { "start": { "local": "1980-01-24T05:56:41+08:00", "utc": "1980-01-23T21:56:41Z", "ms": 317512601265.9644 }, "end": { "local": "1980-01-24T07:43:08+08:00", "utc": "1980-01-23T23:43:08Z", "ms": 317518987751.2963 } }, "covered_min": 106, "window_min": 106, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 12:51 on Wed 23 Jan to 10:50 on Thu 24 Jan.", "fact": "1980-01-23T04:50:44Z → 1980-01-24T02:49:46Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:57–07:43 on the 23rd, 05:57–07:43 on the 24th.", "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 107 minutes on the 23rd and 106 of 106 on the 24th.", "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 11199 s" }, { "step": "ruling", "text": "Ratha Saptamī, Zunyi, 1980: Thursday 24 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": "1980-01-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-24", "confidence": "determinate" } ], "quote": "In Zunyi, Ratha Saptamī 1980 falls on Thursday 24 January. Saptamī runs from 12:51 on Wed 23 Jan to 10:50 on Thu 24 Jan and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-01-27", "festival": "ekadashi", "name": "Jayā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1547, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-01-27T07:16:20+08:00", "utc": "1980-01-26T23:16:20Z", "ms": 317776580200.6958 }, "end": { "local": "1980-01-28T06:58:34+08:00", "utc": "1980-01-27T22:58:34Z", "ms": 317861913723.48834 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-27T07:16:20+08:00", "utc": "1980-01-26T23:16:20Z", "ms": 317776580200.6958 }, "end": { "local": "1980-01-28T06:58:34+08:00", "utc": "1980-01-27T22:58:34Z", "ms": 317861913723.48834 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-01-27", "window": { "start": { "local": "1980-01-27T07:42:07+08:00", "utc": "1980-01-26T23:42:07Z", "ms": 317778126917.79156 }, "end": { "local": "1980-01-27T07:42:07+08:00", "utc": "1980-01-26T23:42:07Z", "ms": 317778126917.79156 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-01-28", "window": { "start": { "local": "1980-01-28T07:41:44+08:00", "utc": "1980-01-27T23:41:44Z", "ms": 317864503615.94293 }, "end": { "local": "1980-01-28T07:41:44+08:00", "utc": "1980-01-27T23:41:44Z", "ms": 317864503615.94293 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 07:16 on Sun 27 Jan to 06:59 on Mon 28 Jan.", "fact": "1980-01-26T23:16:20Z → 1980-01-27T22:58:34Z" }, { "step": "kaala", "text": "Sunrise is at 07:42 on the 27th and 07:42 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 1547 s" }, { "step": "ruling", "text": "Jayā Ekādaśī, Zunyi, 1980: Sunday 27 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": "1980-01-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-27", "confidence": "determinate" } ], "quote": "In Zunyi, Jayā Ekādaśī 1980 falls on Sunday 27 January. Ekādaśī runs from 07:16 on Sun 27 Jan to 06:59 on Mon 28 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-01-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/bhishma-dvadashi", "festival": "bhishma-dvadashi", "name": "Bhīṣma Dvādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20000, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-01-28T06:58:34+08:00", "utc": "1980-01-27T22:58:34Z", "ms": 317861913723.48834 }, "end": { "local": "1980-01-29T07:08:10+08:00", "utc": "1980-01-28T23:08:10Z", "ms": 317948889709.5504 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-28T06:58:34+08:00", "utc": "1980-01-27T22:58:34Z", "ms": 317861913723.48834 }, "end": { "local": "1980-01-29T07:08:10+08:00", "utc": "1980-01-28T23:08:10Z", "ms": 317948889709.5504 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-01-28", "window": { "start": { "local": "1980-01-28T12:41:18+08:00", "utc": "1980-01-28T04:41:18Z", "ms": 317882477891.7866 }, "end": { "local": "1980-01-28T13:29:18+08:00", "utc": "1980-01-28T05:29:18Z", "ms": 317885357891.7866 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-01-29", "window": { "start": { "local": "1980-01-29T12:41:30+08:00", "utc": "1980-01-29T04:41:30Z", "ms": 317968889596.43115 }, "end": { "local": "1980-01-29T13:29:30+08:00", "utc": "1980-01-29T05:29:30Z", "ms": 317971769596.43115 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 06:59 on Mon 28 Jan to 07:08 on Tue 29 Jan.", "fact": "1980-01-27T22:58:34Z → 1980-01-28T23:08:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:41–13:29 on the 28th, 12:41–13:29 on the 29th.", "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 28th and 0 of 48 on the 29th.", "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 20000 s" }, { "step": "ruling", "text": "Bhīṣma Dvādaśī, Zunyi, 1980: Monday 28 January.", "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": "1980-01-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-28", "confidence": "determinate" } ], "quote": "In Zunyi, Bhīṣma Dvādaśī 1980 falls on Monday 28 January. Dvādaśī runs from 06:59 on Mon 28 Jan to 07:08 on Tue 29 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-01-29", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38712, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-01-29T07:08:10+08:00", "utc": "1980-01-28T23:08:10Z", "ms": 317948889709.5504 }, "end": { "local": "1980-01-30T07:45:17+08:00", "utc": "1980-01-29T23:45:17Z", "ms": 318037516843.3784 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-29T07:08:10+08:00", "utc": "1980-01-28T23:08:10Z", "ms": 317948889709.5504 }, "end": { "local": "1980-01-30T07:45:17+08:00", "utc": "1980-01-29T23:45:17Z", "ms": 318037516843.3784 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-01-29", "window": { "start": { "local": "1980-01-29T18:29:40+08:00", "utc": "1980-01-29T10:29:40Z", "ms": 317989780361.3061 }, "end": { "local": "1980-01-29T20:15:10+08:00", "utc": "1980-01-29T12:15:10Z", "ms": 317996109991.03656 } }, "covered_min": 105, "window_min": 105, "qualifies": true }, { "local_date": "1980-01-30", "window": { "start": { "local": "1980-01-30T18:30:28+08:00", "utc": "1980-01-30T10:30:28Z", "ms": 318076228363.7919 }, "end": { "local": "1980-01-30T20:15:48+08:00", "utc": "1980-01-30T12:15:48Z", "ms": 318082547901.25775 } }, "covered_min": 0, "window_min": 105, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 07:08 on Tue 29 Jan to 07:45 on Wed 30 Jan.", "fact": "1980-01-28T23:08:10Z → 1980-01-29T23:45:17Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:30–20:15 on the 29th, 18:30–20:16 on the 30th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 105 of 105 minutes on the 29th and 0 of 105 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 38712 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Tuesday 29 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": "1980-01-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-29", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Tuesday 29 January. Trayodaśī runs from 07:08 on Tue 29 Jan to 07:45 on Wed 30 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-01-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/maghi-purnima", "festival": "maghi-purnima", "name": "Māghī Pūrṇimā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-01-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8447, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-01-31T08:49:50+08:00", "utc": "1980-01-31T00:49:50Z", "ms": 318127790373.3642 }, "end": { "local": "1980-02-01T10:21:13+08:00", "utc": "1980-02-01T02:21:13Z", "ms": 318219672731.42126 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1980-01-31T08:49:50+08:00", "utc": "1980-01-31T00:49:50Z", "ms": 318127790373.3642 }, "end": { "local": "1980-02-01T10:21:13+08:00", "utc": "1980-02-01T02:21:13Z", "ms": 318219672731.42126 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-01-31", "window": { "start": { "local": "1980-01-31T12:41:51+08:00", "utc": "1980-01-31T04:41:51Z", "ms": 318141710525.464 }, "end": { "local": "1980-01-31T13:29:51+08:00", "utc": "1980-01-31T05:29:51Z", "ms": 318144590525.464 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-02-01", "window": { "start": { "local": "1980-02-01T12:42:00+08:00", "utc": "1980-02-01T04:42:00Z", "ms": 318228119752.6694 }, "end": { "local": "1980-02-01T13:30:00+08:00", "utc": "1980-02-01T05:30:00Z", "ms": 318230999752.6694 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 08:50 on Thu 31 Jan to 10:21 on Fri 1 Feb.", "fact": "1980-01-31T00:49:50Z → 1980-02-01T02:21:13Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 31st, 12:42–13:30 on the 1st.", "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 31st and 0 of 48 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 8447 s" }, { "step": "ruling", "text": "Māghī Pūrṇimā, Zunyi, 1980: Thursday 31 January.", "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": "1980-01-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-01-31", "confidence": "determinate" } ], "quote": "In Zunyi, Māghī Pūrṇimā 1980 falls on Thursday 31 January. Pūrṇimā runs from 08:50 on Thu 31 Jan to 10:21 on Fri 1 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-02-04", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-02-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8646, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-02-04T17:10:05+08:00", "utc": "1980-02-04T09:10:05Z", "ms": 318503404657.44086 }, "end": { "local": "1980-02-05T19:51:56+08:00", "utc": "1980-02-05T11:51:56Z", "ms": 318599516424.31793 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-02-04T17:10:05+08:00", "utc": "1980-02-04T09:10:05Z", "ms": 318503404657.44086 }, "end": { "local": "1980-02-05T19:51:56+08:00", "utc": "1980-02-05T11:51:56Z", "ms": 318599516424.31793 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-02-04", "window": { "start": { "local": "1980-02-04T21:25:24+08:00", "utc": "1980-02-04T13:25:24Z", "ms": 318518724365.61707 }, "end": { "local": "1980-02-04T21:25:24+08:00", "utc": "1980-02-04T13:25:24Z", "ms": 318518724365.61707 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-02-05", "window": { "start": { "local": "1980-02-05T22:16:03+08:00", "utc": "1980-02-05T14:16:03Z", "ms": 318608162658.8228 }, "end": { "local": "1980-02-05T22:16:03+08:00", "utc": "1980-02-05T14:16:03Z", "ms": 318608162658.8228 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:10 on Mon 4 Feb to 19:52 on Tue 5 Feb.", "fact": "1980-02-04T09:10:05Z → 1980-02-05T11:51:56Z" }, { "step": "kaala", "text": "Moonrise is at 21:25 on the 4th and 22:16 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 8646 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Monday 4 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": "1980-02-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-02-04", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Monday 4 February. Caturthī runs from 17:10 on Mon 4 Feb to 19:52 on Tue 5 Feb and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-02-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-02-12", "festival": "ekadashi", "name": "Vijayā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-02-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11205, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-02-12T04:26:24+08:00", "utc": "1980-02-11T20:26:24Z", "ms": 319148783765.35516 }, "end": { "local": "1980-02-13T03:22:17+08:00", "utc": "1980-02-12T19:22:17Z", "ms": 319231336961.9593 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-02-12T04:26:24+08:00", "utc": "1980-02-11T20:26:24Z", "ms": 319148783765.35516 }, "end": { "local": "1980-02-13T03:22:17+08:00", "utc": "1980-02-12T19:22:17Z", "ms": 319231336961.9593 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-02-12", "window": { "start": { "local": "1980-02-12T07:33:08+08:00", "utc": "1980-02-11T23:33:08Z", "ms": 319159988448.45184 }, "end": { "local": "1980-02-12T07:33:08+08:00", "utc": "1980-02-11T23:33:08Z", "ms": 319159988448.45184 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-02-13", "window": { "start": { "local": "1980-02-13T07:32:24+08:00", "utc": "1980-02-12T23:32:24Z", "ms": 319246344127.33453 }, "end": { "local": "1980-02-13T07:32:24+08:00", "utc": "1980-02-12T23:32:24Z", "ms": 319246344127.33453 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 04:26 on Tue 12 Feb to 03:22 on Wed 13 Feb.", "fact": "1980-02-11T20:26:24Z → 1980-02-12T19:22:17Z" }, { "step": "kaala", "text": "Sunrise is at 07:33 on the 12th and 07:32 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 11205 s" }, { "step": "ruling", "text": "Vijayā Ekādaśī, Zunyi, 1980: Tuesday 12 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": "1980-02-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-02-12", "confidence": "determinate" } ], "quote": "In Zunyi, Vijayā Ekādaśī 1980 falls on Tuesday 12 February. Ekādaśī runs from 04:26 on Tue 12 Feb to 03:22 on Wed 13 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-02-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/maha-shivaratri", "festival": "maha-shivaratri", "name": "Mahāśivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-02-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5754, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-02-14T23:06:30+08:00", "utc": "1980-02-14T15:06:30Z", "ms": 319388789661.8215 }, "end": { "local": "1980-02-15T20:09:14+08:00", "utc": "1980-02-15T12:09:14Z", "ms": 319464554052.8805 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-02-14T23:06:30+08:00", "utc": "1980-02-14T15:06:30Z", "ms": 319388789661.8215 }, "end": { "local": "1980-02-15T20:09:14+08:00", "utc": "1980-02-15T12:09:14Z", "ms": 319464554052.8805 } }, "kaala": "nishita", "days": [ { "local_date": "1980-02-14", "window": { "start": { "local": "1980-02-15T00:42:24+08:00", "utc": "1980-02-14T16:42:24Z", "ms": 319394543676.64746 }, "end": { "local": "1980-02-15T01:30:24+08:00", "utc": "1980-02-14T17:30:24Z", "ms": 319397423676.64746 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-02-15", "window": { "start": { "local": "1980-02-16T00:42:21+08:00", "utc": "1980-02-15T16:42:21Z", "ms": 319480941409.26697 }, "end": { "local": "1980-02-16T01:30:21+08:00", "utc": "1980-02-15T17:30:21Z", "ms": 319483821409.26697 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:06 on Thu 14 Feb to 20:09 on Fri 15 Feb.", "fact": "1980-02-14T15:06:30Z → 1980-02-15T12:09:14Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:42–01:30 on the 14th, 00:42–01:30 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. 105" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 5754 s" }, { "step": "ruling", "text": "Mahāśivarātri, Zunyi, 1980: Thursday 14 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": "1980-02-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-02-14", "confidence": "determinate" } ], "quote": "In Zunyi, Mahāśivarātri 1980 falls on Thursday 14 February. Caturdaśī runs from 23:06 on Thu 14 Feb to 20:09 on Fri 15 Feb and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-02-14", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-02-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9723, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-02-14T01:33:32+08:00", "utc": "1980-02-13T17:33:32Z", "ms": 319311212205.66187 }, "end": { "local": "1980-02-14T23:06:30+08:00", "utc": "1980-02-14T15:06:30Z", "ms": 319388789661.8215 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-02-14T01:33:32+08:00", "utc": "1980-02-13T17:33:32Z", "ms": 319311212205.66187 }, "end": { "local": "1980-02-14T23:06:30+08:00", "utc": "1980-02-14T15:06:30Z", "ms": 319388789661.8215 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-02-13", "window": { "start": { "local": "1980-02-13T18:41:12+08:00", "utc": "1980-02-13T10:41:12Z", "ms": 319286471738.24976 }, "end": { "local": "1980-02-13T20:23:55+08:00", "utc": "1980-02-13T12:23:55Z", "ms": 319292635332.6905 } }, "covered_min": 0, "window_min": 103, "qualifies": false }, { "local_date": "1980-02-14", "window": { "start": { "local": "1980-02-14T18:41:55+08:00", "utc": "1980-02-14T10:41:55Z", "ms": 319372915174.1236 }, "end": { "local": "1980-02-14T20:24:27+08:00", "utc": "1980-02-14T12:24:27Z", "ms": 319379066774.79663 } }, "covered_min": 103, "window_min": 103, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:34 on Thu 14 Feb to 23:06 on Thu 14 Feb.", "fact": "1980-02-13T17:33:32Z → 1980-02-14T15:06:30Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:41–20:24 on the 13th, 18:42–20:24 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 103 minutes on the 13th and 103 of 103 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 9723 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Thursday 14 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": "1980-02-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-02-14", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Thursday 14 February. Trayodaśī runs from 01:34 on Thu 14 Feb to 23:06 on Thu 14 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-02-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-02-19", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-02-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22633, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-02-19T06:25:18+08:00", "utc": "1980-02-18T22:25:18Z", "ms": 319760717865.0903 }, "end": { "local": "1980-02-20T03:17:45+08:00", "utc": "1980-02-19T19:17:45Z", "ms": 319835865071.79645 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-02-19T06:25:18+08:00", "utc": "1980-02-18T22:25:18Z", "ms": 319760717865.0903 }, "end": { "local": "1980-02-20T03:17:45+08:00", "utc": "1980-02-19T19:17:45Z", "ms": 319835865071.79645 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-02-19", "window": { "start": { "local": "1980-02-19T12:42:31+08:00", "utc": "1980-02-19T04:42:31Z", "ms": 319783351010.97943 }, "end": { "local": "1980-02-19T13:30:31+08:00", "utc": "1980-02-19T05:30:31Z", "ms": 319786231010.97943 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-02-20", "window": { "start": { "local": "1980-02-20T12:42:26+08:00", "utc": "1980-02-20T04:42:26Z", "ms": 319869745689.1323 }, "end": { "local": "1980-02-20T13:30:26+08:00", "utc": "1980-02-20T05:30:26Z", "ms": 319872625689.1323 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 06:25 on Tue 19 Feb to 03:18 on Wed 20 Feb.", "fact": "1980-02-18T22:25:18Z → 1980-02-19T19:17:45Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:43–13:31 on the 19th, 12:42–13:30 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 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. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 22633 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Tuesday 19 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": "1980-02-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-02-19", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Tuesday 19 February. Caturthī runs from 06:25 on Tue 19 Feb to 03:18 on Wed 20 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-02-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-02-26", "festival": "ekadashi", "name": "Āmalakī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-02-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37520, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-02-25T19:57:01+08:00", "utc": "1980-02-25T11:57:01Z", "ms": 320327821206.61804 }, "end": { "local": "1980-02-26T20:54:57+08:00", "utc": "1980-02-26T12:54:57Z", "ms": 320417697472.9288 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-02-25T19:57:01+08:00", "utc": "1980-02-25T11:57:01Z", "ms": 320327821206.61804 }, "end": { "local": "1980-02-26T20:54:57+08:00", "utc": "1980-02-26T12:54:57Z", "ms": 320417697472.9288 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-02-26", "window": { "start": { "local": "1980-02-26T07:21:15+08:00", "utc": "1980-02-25T23:21:15Z", "ms": 320368875305.51965 }, "end": { "local": "1980-02-26T07:21:15+08:00", "utc": "1980-02-25T23:21:15Z", "ms": 320368875305.51965 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-02-27", "window": { "start": { "local": "1980-02-27T07:20:18+08:00", "utc": "1980-02-26T23:20:18Z", "ms": 320455217607.211 }, "end": { "local": "1980-02-27T07:20:18+08:00", "utc": "1980-02-26T23:20:18Z", "ms": 320455217607.211 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 19:57 on Mon 25 Feb to 20:55 on Tue 26 Feb.", "fact": "1980-02-25T11:57:01Z → 1980-02-26T12:54:57Z" }, { "step": "kaala", "text": "Sunrise is at 07:21 on the 26th and 07:20 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 37520 s" }, { "step": "ruling", "text": "Āmalakī Ekādaśī, Zunyi, 1980: Tuesday 26 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": "1980-02-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-02-26", "confidence": "determinate" } ], "quote": "In Zunyi, Āmalakī Ekādaśī 1980 falls on Tuesday 26 February. Ekādaśī runs from 19:57 on Mon 25 Feb to 20:55 on Tue 26 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-02-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-02-28", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-02-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6792, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-02-27T22:23:43+08:00", "utc": "1980-02-27T14:23:43Z", "ms": 320509423476.529 }, "end": { "local": "1980-02-29T00:17:54+08:00", "utc": "1980-02-28T16:17:54Z", "ms": 320602674233.8798 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-02-27T22:23:43+08:00", "utc": "1980-02-27T14:23:43Z", "ms": 320509423476.529 }, "end": { "local": "1980-02-29T00:17:54+08:00", "utc": "1980-02-28T16:17:54Z", "ms": 320602674233.8798 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-02-27", "window": { "start": { "local": "1980-02-27T18:50:42+08:00", "utc": "1980-02-27T10:50:42Z", "ms": 320496642275.36884 }, "end": { "local": "1980-02-27T20:30:31+08:00", "utc": "1980-02-27T12:30:31Z", "ms": 320502631193.1764 } }, "covered_min": 0, "window_min": 100, "qualifies": false }, { "local_date": "1980-02-28", "window": { "start": { "local": "1980-02-28T18:51:20+08:00", "utc": "1980-02-28T10:51:20Z", "ms": 320583079919.87256 }, "end": { "local": "1980-02-28T20:30:56+08:00", "utc": "1980-02-28T12:30:56Z", "ms": 320589055929.41516 } }, "covered_min": 100, "window_min": 100, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 22:24 on Wed 27 Feb to 00:18 on Fri 29 Feb.", "fact": "1980-02-27T14:23:43Z → 1980-02-28T16:17:54Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:51–20:31 on the 27th, 18:51–20:31 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 100 minutes on the 27th and 100 of 100 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 6792 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Thursday 28 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": "1980-02-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-02-28", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Thursday 28 February. Trayodaśī runs from 22:24 on Wed 27 Feb to 00:18 on Fri 29 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-02-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/holika-dahana", "festival": "holika-dahana", "name": "Holikā Dahana", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27590, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-03-01T02:31:47+08:00", "utc": "1980-02-29T18:31:47Z", "ms": 320697107483.85254 }, "end": { "local": "1980-03-02T04:59:39+08:00", "utc": "1980-03-01T20:59:39Z", "ms": 320792378643.13794 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-03-01T02:31:47+08:00", "utc": "1980-02-29T18:31:47Z", "ms": 320697107483.85254 }, "end": { "local": "1980-03-02T04:59:39+08:00", "utc": "1980-03-01T20:59:39Z", "ms": 320792378643.13794 } }, "kaala": "sayahna", "days": [ { "local_date": "1980-02-29", "window": { "start": { "local": "1980-02-29T16:33:14+08:00", "utc": "1980-02-29T08:33:14Z", "ms": 320661193743.25824 }, "end": { "local": "1980-02-29T18:51:57+08:00", "utc": "1980-02-29T10:51:57Z", "ms": 320669517181.2123 } }, "covered_min": 0, "window_min": 139, "qualifies": false }, { "local_date": "1980-03-01", "window": { "start": { "local": "1980-03-01T16:33:31+08:00", "utc": "1980-03-01T08:33:31Z", "ms": 320747611283.57635 }, "end": { "local": "1980-03-01T18:52:34+08:00", "utc": "1980-03-01T10:52:34Z", "ms": 320755954070.5597 } }, "covered_min": 139, "window_min": 139, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:32 on Sat 1 Mar to 05:00 on Sun 2 Mar.", "fact": "1980-02-29T18:31:47Z → 1980-03-01T20:59:39Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:33–18:52 on the 29th, 16:34–18:53 on the 1st.", "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 139 minutes on the 29th and 139 of 139 on the 1st.", "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 27590 s" }, { "step": "ruling", "text": "Holikā Dahana, Zunyi, 1980: Saturday 1 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": "1980-03-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-01", "confidence": "determinate" } ], "quote": "In Zunyi, Holikā Dahana 1980 falls on Saturday 1 March. Pūrṇimā runs from 02:32 on Sat 1 Mar to 05:00 on Sun 2 Mar and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/holi", "festival": "holi", "name": "Holī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27590, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-03-01T02:31:47+08:00", "utc": "1980-02-29T18:31:47Z", "ms": 320697107483.85254 }, "end": { "local": "1980-03-02T04:59:39+08:00", "utc": "1980-03-01T20:59:39Z", "ms": 320792378643.13794 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1980-03-01T02:31:47+08:00", "utc": "1980-02-29T18:31:47Z", "ms": 320697107483.85254 }, "end": { "local": "1980-03-02T04:59:39+08:00", "utc": "1980-03-01T20:59:39Z", "ms": 320792378643.13794 } }, "kaala": "sayahna", "days": [ { "local_date": "1980-02-29", "window": { "start": { "local": "1980-02-29T16:33:14+08:00", "utc": "1980-02-29T08:33:14Z", "ms": 320661193743.25824 }, "end": { "local": "1980-02-29T18:51:57+08:00", "utc": "1980-02-29T10:51:57Z", "ms": 320669517181.2123 } }, "covered_min": 0, "window_min": 139, "qualifies": false }, { "local_date": "1980-03-01", "window": { "start": { "local": "1980-03-01T16:33:31+08:00", "utc": "1980-03-01T08:33:31Z", "ms": 320747611283.57635 }, "end": { "local": "1980-03-01T18:52:34+08:00", "utc": "1980-03-01T10:52:34Z", "ms": 320755954070.5597 } }, "covered_min": 139, "window_min": 139, "qualifies": true } ], "follows": { "festival": "holika-dahana", "name": "Holikā Dahana", "local_date": "1980-03-01", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:32 on Sat 1 Mar to 05:00 on Sun 2 Mar.", "fact": "1980-02-29T18:31:47Z → 1980-03-01T20:59:39Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:33–18:52 on the 29th, 16:34–18:53 on the 1st.", "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 139 minutes on the 29th and 139 of 139 on the 1st.", "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 27590 s" }, { "step": "counted", "text": "Holī is kept the day after Holikā Dahana: Saturday 1 March is the day taken above.", "fact": "follows: holika-dahana + 1 d" }, { "step": "ruling", "text": "Holī, Zunyi, 1980: Sunday 2 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": "1980-03-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-02", "confidence": "determinate" } ], "quote": "In Zunyi, Holī 1980 falls on Sunday 2 March. It is kept the day after Holikā Dahana, which falls on Saturday 1 March. Pūrṇimā runs from 02:32 on Sat 1 Mar to 05:00 on Sun 2 Mar and covers all of sāyāhna on the 1st.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vasantotsava", "festival": "vasantotsava", "name": "Vasantotsava", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1220, "anga": { "type": "tithi", "index": 15, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1980-03-02T04:59:39+08:00", "utc": "1980-03-01T20:59:39Z", "ms": 320792378643.13794 }, "end": { "local": "1980-03-03T07:35:39+08:00", "utc": "1980-03-02T23:35:39Z", "ms": 320888138798.4052 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-02T04:59:39+08:00", "utc": "1980-03-01T20:59:39Z", "ms": 320792378643.13794 }, "end": { "local": "1980-03-03T07:35:39+08:00", "utc": "1980-03-02T23:35:39Z", "ms": 320888138798.4052 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-03-02", "window": { "start": { "local": "1980-03-02T07:16:20+08:00", "utc": "1980-03-01T23:16:20Z", "ms": 320800579622.5623 }, "end": { "local": "1980-03-02T07:16:20+08:00", "utc": "1980-03-01T23:16:20Z", "ms": 320800579622.5623 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-03-03", "window": { "start": { "local": "1980-03-03T07:15:18+08:00", "utc": "1980-03-02T23:15:18Z", "ms": 320886918482.95355 }, "end": { "local": "1980-03-03T07:15:18+08:00", "utc": "1980-03-02T23:15:18Z", "ms": 320886918482.95355 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "purvaviddha", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 05:00 on Sun 2 Mar to 07:36 on Mon 3 Mar.", "fact": "1980-03-01T20:59:39Z → 1980-03-02T23:35:39Z" }, { "step": "kaala", "text": "Sunrise is at 07:16 on the 2nd and 07:15 on the 3rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be current at sunrise. It is on the 2nd and is on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Both sunrises qualify. Pūrvaviddhā: the first is taken.", "fact": "priority: purvaviddha → purvaviddha · margin 1220 s" }, { "step": "ruling", "text": "Vasantotsava, Zunyi, 1980: Sunday 2 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": "1980-03-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-02", "confidence": "determinate" } ], "quote": "In Zunyi, Vasantotsava 1980 falls on Sunday 2 March. Pratipadā runs from 05:00 on Sun 2 Mar to 07:36 on Mon 3 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-03-05", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27358, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-03-05T12:46:57+08:00", "utc": "1980-03-05T04:46:57Z", "ms": 321079616880.68555 }, "end": { "local": "1980-03-06T15:07:58+08:00", "utc": "1980-03-06T07:07:58Z", "ms": 321174477660.54974 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-05T12:46:57+08:00", "utc": "1980-03-05T04:46:57Z", "ms": 321079616880.68555 }, "end": { "local": "1980-03-06T15:07:58+08:00", "utc": "1980-03-06T07:07:58Z", "ms": 321174477660.54974 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-03-05", "window": { "start": { "local": "1980-03-05T21:52:23+08:00", "utc": "1980-03-05T13:52:23Z", "ms": 321112343467.2342 }, "end": { "local": "1980-03-05T21:52:23+08:00", "utc": "1980-03-05T13:52:23Z", "ms": 321112343467.2342 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-03-06", "window": { "start": { "local": "1980-03-06T22:43:56+08:00", "utc": "1980-03-06T14:43:56Z", "ms": 321201835745.06287 }, "end": { "local": "1980-03-06T22:43:56+08:00", "utc": "1980-03-06T14:43:56Z", "ms": 321201835745.06287 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:47 on Wed 5 Mar to 15:08 on Thu 6 Mar.", "fact": "1980-03-05T04:46:57Z → 1980-03-06T07:07:58Z" }, { "step": "kaala", "text": "Moonrise is at 21:52 on the 5th and 22:44 on the 6th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī 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. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 27358 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Wednesday 5 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": "1980-03-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-05", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Wednesday 5 March. Caturthī runs from 12:47 on Wed 5 Mar to 15:08 on Thu 6 Mar and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-03-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shitalashtami", "festival": "shitalashtami", "name": "Śītalāṣṭamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22145, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-03-09T19:36:14+08:00", "utc": "1980-03-09T11:36:14Z", "ms": 321449773658.41095 }, "end": { "local": "1980-03-10T19:50:05+08:00", "utc": "1980-03-10T11:50:05Z", "ms": 321537004528.4738 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-09T19:36:14+08:00", "utc": "1980-03-09T11:36:14Z", "ms": 321449773658.41095 }, "end": { "local": "1980-03-10T19:50:05+08:00", "utc": "1980-03-10T11:50:05Z", "ms": 321537004528.4738 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-09", "window": { "start": { "local": "1980-03-09T12:39:09+08:00", "utc": "1980-03-09T04:39:09Z", "ms": 321424748746.93976 }, "end": { "local": "1980-03-09T13:27:09+08:00", "utc": "1980-03-09T05:27:09Z", "ms": 321427628746.93976 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-10", "window": { "start": { "local": "1980-03-10T12:38:53+08:00", "utc": "1980-03-10T04:38:53Z", "ms": 321511133466.2385 }, "end": { "local": "1980-03-10T13:26:53+08:00", "utc": "1980-03-10T05:26:53Z", "ms": 321514013466.2385 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 19:36 on Sun 9 Mar to 19:50 on Mon 10 Mar.", "fact": "1980-03-09T11:36:14Z → 1980-03-10T11:50:05Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:39–13:27 on the 9th, 12:39–13:27 on the 10th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 22145 s" }, { "step": "ruling", "text": "Śītalāṣṭamī, Zunyi, 1980: Monday 10 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": "1980-03-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-10", "confidence": "determinate" } ], "quote": "In Zunyi, Śītalāṣṭamī 1980 falls on Monday 10 March. Aṣṭamī runs from 19:36 on Sun 9 Mar to 19:50 on Mon 10 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-03-13", "festival": "ekadashi", "name": "Pāpamocanī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32210, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-03-12T18:01:42+08:00", "utc": "1980-03-12T10:01:42Z", "ms": 321703302075.6423 }, "end": { "local": "1980-03-13T16:01:30+08:00", "utc": "1980-03-13T08:01:30Z", "ms": 321782489770.63 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-12T18:01:42+08:00", "utc": "1980-03-12T10:01:42Z", "ms": 321703302075.6423 }, "end": { "local": "1980-03-13T16:01:30+08:00", "utc": "1980-03-13T08:01:30Z", "ms": 321782489770.63 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-03-12", "window": { "start": { "local": "1980-03-12T07:05:45+08:00", "utc": "1980-03-11T23:05:45Z", "ms": 321663945052.2625 }, "end": { "local": "1980-03-12T07:05:45+08:00", "utc": "1980-03-11T23:05:45Z", "ms": 321663945052.2625 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-03-13", "window": { "start": { "local": "1980-03-13T07:04:39+08:00", "utc": "1980-03-12T23:04:39Z", "ms": 321750279304.46326 }, "end": { "local": "1980-03-13T07:04:39+08:00", "utc": "1980-03-12T23:04:39Z", "ms": 321750279304.46326 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:02 on Wed 12 Mar to 16:01 on Thu 13 Mar.", "fact": "1980-03-12T10:01:42Z → 1980-03-13T08:01:30Z" }, { "step": "kaala", "text": "Sunrise is at 07:06 on the 12th and 07:05 on the 13th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 12th and is on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 32210 s" }, { "step": "ruling", "text": "Pāpamocanī Ekādaśī, Zunyi, 1980: Thursday 13 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": "1980-03-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-13", "confidence": "determinate" } ], "quote": "In Zunyi, Pāpamocanī Ekādaśī 1980 falls on Thursday 13 March. Ekādaśī runs from 18:02 on Wed 12 Mar to 16:01 on Thu 13 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-03-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-03-14", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20221, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-03-14T13:23:04+08:00", "utc": "1980-03-14T05:23:04Z", "ms": 321859384240.06384 }, "end": { "local": "1980-03-15T10:13:27+08:00", "utc": "1980-03-15T02:13:27Z", "ms": 321934406943.7511 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-14T13:23:04+08:00", "utc": "1980-03-14T05:23:04Z", "ms": 321859384240.06384 }, "end": { "local": "1980-03-15T10:13:27+08:00", "utc": "1980-03-15T02:13:27Z", "ms": 321934406943.7511 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-03-14", "window": { "start": { "local": "1980-03-14T19:00:06+08:00", "utc": "1980-03-14T11:00:06Z", "ms": 321879605519.3558 }, "end": { "local": "1980-03-14T20:36:24+08:00", "utc": "1980-03-14T12:36:24Z", "ms": 321885384373.2181 } }, "covered_min": 96, "window_min": 96, "qualifies": true }, { "local_date": "1980-03-15", "window": { "start": { "local": "1980-03-15T19:00:39+08:00", "utc": "1980-03-15T11:00:39Z", "ms": 321966038515.8511 }, "end": { "local": "1980-03-15T20:36:44+08:00", "utc": "1980-03-15T12:36:44Z", "ms": 321971804092.4067 } }, "covered_min": 0, "window_min": 96, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:23 on Fri 14 Mar to 10:13 on Sat 15 Mar.", "fact": "1980-03-14T05:23:04Z → 1980-03-15T02:13:27Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:00–20:36 on the 14th, 19:01–20:37 on the 15th.", "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 14th and 0 of 96 on the 15th.", "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 20221 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Friday 14 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": "1980-03-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-14", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Friday 14 March. Trayodaśī runs from 13:23 on Fri 14 Mar to 10:13 on Sat 15 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-03-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-03-15", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18971, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-03-15T10:13:27+08:00", "utc": "1980-03-15T02:13:27Z", "ms": 321934406943.7511 }, "end": { "local": "1980-03-16T06:41:11+08:00", "utc": "1980-03-15T22:41:11Z", "ms": 322008070835.5283 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-15T10:13:27+08:00", "utc": "1980-03-15T02:13:27Z", "ms": 321934406943.7511 }, "end": { "local": "1980-03-16T06:41:11+08:00", "utc": "1980-03-15T22:41:11Z", "ms": 322008070835.5283 } }, "kaala": "nishita", "days": [ { "local_date": "1980-03-14", "window": { "start": { "local": "1980-03-15T00:37:16+08:00", "utc": "1980-03-14T16:37:16Z", "ms": 321899836221.3395 }, "end": { "local": "1980-03-15T01:25:16+08:00", "utc": "1980-03-14T17:25:16Z", "ms": 321902716221.3395 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-15", "window": { "start": { "local": "1980-03-16T00:36:59+08:00", "utc": "1980-03-15T16:36:59Z", "ms": 321986219427.9346 }, "end": { "local": "1980-03-16T01:24:59+08:00", "utc": "1980-03-15T17:24:59Z", "ms": 321989099427.9346 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:13 on Sat 15 Mar to 06:41 on Sun 16 Mar.", "fact": "1980-03-15T02:13:27Z → 1980-03-15T22:41:11Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:37–01:25 on the 14th, 00:37–01:25 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 18971 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Saturday 15 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": "1980-03-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-15", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Saturday 15 March. Caturdaśī runs from 10:13 on Sat 15 Mar to 06:41 on Sun 16 Mar and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-03-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/navaratra-arambha-caitra", "festival": "navaratra-arambha-caitra", "name": "Navarātrārambha (Caitra)", "everyday": "Chaitra Navratri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34867, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1980-03-17T02:55:52+08:00", "utc": "1980-03-16T18:55:52Z", "ms": 322080952026.681 }, "end": { "local": "1980-03-17T23:07:46+08:00", "utc": "1980-03-17T15:07:46Z", "ms": 322153665523.2042 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-17T02:55:52+08:00", "utc": "1980-03-16T18:55:52Z", "ms": 322080952026.681 }, "end": { "local": "1980-03-17T23:07:46+08:00", "utc": "1980-03-17T15:07:46Z", "ms": 322153665523.2042 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-17", "window": { "start": { "local": "1980-03-17T12:36:59+08:00", "utc": "1980-03-17T04:36:59Z", "ms": 322115818726.5752 }, "end": { "local": "1980-03-17T13:24:59+08:00", "utc": "1980-03-17T05:24:59Z", "ms": 322118698726.5752 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-03-18", "window": { "start": { "local": "1980-03-18T12:36:41+08:00", "utc": "1980-03-18T04:36:41Z", "ms": 322202201430.42194 }, "end": { "local": "1980-03-18T13:24:41+08:00", "utc": "1980-03-18T05:24:41Z", "ms": 322205081430.42194 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 02:56 on Mon 17 Mar to 23:08 on Mon 17 Mar.", "fact": "1980-03-16T18:55:52Z → 1980-03-17T15:07:46Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 17th, 12:37–13:25 on the 18th.", "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 17th and 0 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 34867 s" }, { "step": "ruling", "text": "Navarātrārambha (Caitra), Zunyi, 1980: Monday 17 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": "1980-03-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-17", "confidence": "determinate" } ], "quote": "In Zunyi, Navarātrārambha (Caitra) (Chaitra Navratri) 1980 falls on Monday 17 March. Pratipadā runs from 02:56 on Mon 17 Mar to 23:08 on Mon 17 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/gauri-tritiya", "festival": "gauri-tritiya", "name": "Gaurī Tṛtīyā", "everyday": "Gangaur", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9649, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-03-18T19:27:23+08:00", "utc": "1980-03-18T11:27:23Z", "ms": 322226843436.2071 }, "end": { "local": "1980-03-19T16:05:12+08:00", "utc": "1980-03-19T08:05:12Z", "ms": 322301112457.1697 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-18T19:27:23+08:00", "utc": "1980-03-18T11:27:23Z", "ms": 322226843436.2071 }, "end": { "local": "1980-03-19T16:05:12+08:00", "utc": "1980-03-19T08:05:12Z", "ms": 322301112457.1697 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-18", "window": { "start": { "local": "1980-03-18T12:36:41+08:00", "utc": "1980-03-18T04:36:41Z", "ms": 322202201430.42194 }, "end": { "local": "1980-03-18T13:24:41+08:00", "utc": "1980-03-18T05:24:41Z", "ms": 322205081430.42194 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-19", "window": { "start": { "local": "1980-03-19T12:36:24+08:00", "utc": "1980-03-19T04:36:24Z", "ms": 322288583954.8024 }, "end": { "local": "1980-03-19T13:24:24+08:00", "utc": "1980-03-19T05:24:24Z", "ms": 322291463954.8024 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 19:27 on Tue 18 Mar to 16:05 on Wed 19 Mar.", "fact": "1980-03-18T11:27:23Z → 1980-03-19T08:05:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 18th, 12:36–13:24 on the 19th.", "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 18th and 48 of 48 on the 19th.", "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 9649 s" }, { "step": "ruling", "text": "Gaurī Tṛtīyā, Zunyi, 1980: Wednesday 19 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": "1980-03-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-19", "confidence": "determinate" } ], "quote": "In Zunyi, Gaurī Tṛtīyā (Gangaur) 1980 falls on Wednesday 19 March. Tṛtīyā runs from 19:27 on Tue 18 Mar to 16:05 on Wed 19 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/saubhagya-shayana-vrata", "festival": "saubhagya-shayana-vrata", "name": "Saubhāgya Śayana Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9649, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-03-18T19:27:23+08:00", "utc": "1980-03-18T11:27:23Z", "ms": 322226843436.2071 }, "end": { "local": "1980-03-19T16:05:12+08:00", "utc": "1980-03-19T08:05:12Z", "ms": 322301112457.1697 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-18T19:27:23+08:00", "utc": "1980-03-18T11:27:23Z", "ms": 322226843436.2071 }, "end": { "local": "1980-03-19T16:05:12+08:00", "utc": "1980-03-19T08:05:12Z", "ms": 322301112457.1697 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-18", "window": { "start": { "local": "1980-03-18T12:36:41+08:00", "utc": "1980-03-18T04:36:41Z", "ms": 322202201430.42194 }, "end": { "local": "1980-03-18T13:24:41+08:00", "utc": "1980-03-18T05:24:41Z", "ms": 322205081430.42194 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-19", "window": { "start": { "local": "1980-03-19T12:36:24+08:00", "utc": "1980-03-19T04:36:24Z", "ms": 322288583954.8024 }, "end": { "local": "1980-03-19T13:24:24+08:00", "utc": "1980-03-19T05:24:24Z", "ms": 322291463954.8024 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 19:27 on Tue 18 Mar to 16:05 on Wed 19 Mar.", "fact": "1980-03-18T11:27:23Z → 1980-03-19T08:05:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 18th, 12:36–13:24 on the 19th.", "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 18th and 48 of 48 on the 19th.", "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 9649 s" }, { "step": "ruling", "text": "Saubhāgya Śayana Vrata, Zunyi, 1980: Wednesday 19 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": "1980-03-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-19", "confidence": "determinate" } ], "quote": "In Zunyi, Saubhāgya Śayana Vrata 1980 falls on Wednesday 19 March. Tṛtīyā runs from 19:27 on Tue 18 Mar to 16:05 on Wed 19 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/lakshmi-panchami", "festival": "lakshmi-panchami", "name": "Lakṣmī Pañcamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 779, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-03-20T13:11:07+08:00", "utc": "1980-03-20T05:11:07Z", "ms": 322377066862.65027 }, "end": { "local": "1980-03-21T10:53:54+08:00", "utc": "1980-03-21T02:53:54Z", "ms": 322455234001.4824 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-20T13:11:07+08:00", "utc": "1980-03-20T05:11:07Z", "ms": 322377066862.65027 }, "end": { "local": "1980-03-21T10:53:54+08:00", "utc": "1980-03-21T02:53:54Z", "ms": 322455234001.4824 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-20", "window": { "start": { "local": "1980-03-20T12:36:06+08:00", "utc": "1980-03-20T04:36:06Z", "ms": 322374966315.7894 }, "end": { "local": "1980-03-20T13:24:06+08:00", "utc": "1980-03-20T05:24:06Z", "ms": 322377846315.7894 } }, "covered_min": 13, "window_min": 48, "qualifies": true }, { "local_date": "1980-03-21", "window": { "start": { "local": "1980-03-21T12:35:49+08:00", "utc": "1980-03-21T04:35:49Z", "ms": 322461348530.54395 }, "end": { "local": "1980-03-21T13:23:49+08:00", "utc": "1980-03-21T05:23:49Z", "ms": 322464228530.54395 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 13:11 on Thu 20 Mar to 10:54 on Fri 21 Mar.", "fact": "1980-03-20T05:11:07Z → 1980-03-21T02:53:54Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:36–13:24 on the 20th, 12:36–13:24 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 13 of 48 minutes on the 20th and 0 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 779 s" }, { "step": "ruling", "text": "Lakṣmī Pañcamī, Zunyi, 1980: Thursday 20 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": "1980-03-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-20", "confidence": "determinate" } ], "quote": "In Zunyi, Lakṣmī Pañcamī 1980 falls on Thursday 20 March. Pañcamī runs from 13:11 on Thu 20 Mar to 10:54 on Fri 21 Mar and covers 13 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-03-20", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 779, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-03-19T16:05:12+08:00", "utc": "1980-03-19T08:05:12Z", "ms": 322301112457.1697 }, "end": { "local": "1980-03-20T13:11:07+08:00", "utc": "1980-03-20T05:11:07Z", "ms": 322377066862.65027 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-19T16:05:12+08:00", "utc": "1980-03-19T08:05:12Z", "ms": 322301112457.1697 }, "end": { "local": "1980-03-20T13:11:07+08:00", "utc": "1980-03-20T05:11:07Z", "ms": 322377066862.65027 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-19", "window": { "start": { "local": "1980-03-19T12:36:24+08:00", "utc": "1980-03-19T04:36:24Z", "ms": 322288583954.8024 }, "end": { "local": "1980-03-19T13:24:24+08:00", "utc": "1980-03-19T05:24:24Z", "ms": 322291463954.8024 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-20", "window": { "start": { "local": "1980-03-20T12:36:06+08:00", "utc": "1980-03-20T04:36:06Z", "ms": 322374966315.7894 }, "end": { "local": "1980-03-20T13:24:06+08:00", "utc": "1980-03-20T05:24:06Z", "ms": 322377846315.7894 } }, "covered_min": 35, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 16:05 on Wed 19 Mar to 13:11 on Thu 20 Mar.", "fact": "1980-03-19T08:05:12Z → 1980-03-20T05:11:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:36–13:24 on the 19th, 12:36–13:24 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 35 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 779 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Thursday 20 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": "1980-03-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-20", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Thursday 20 March. Caturthī runs from 16:05 on Wed 19 Mar to 13:11 on Thu 20 Mar and covers 35 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-03-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/bhavani-utpatti", "festival": "bhavani-utpatti", "name": "Bhavānī Utpatti", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14132, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-03-23T08:35:20+08:00", "utc": "1980-03-23T00:35:20Z", "ms": 322619720334.5975 }, "end": { "local": "1980-03-24T08:39:22+08:00", "utc": "1980-03-24T00:39:22Z", "ms": 322706362086.4486 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-23T08:35:20+08:00", "utc": "1980-03-23T00:35:20Z", "ms": 322619720334.5975 }, "end": { "local": "1980-03-24T08:39:22+08:00", "utc": "1980-03-24T00:39:22Z", "ms": 322706362086.4486 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-23", "window": { "start": { "local": "1980-03-23T12:35:13+08:00", "utc": "1980-03-23T04:35:13Z", "ms": 322634112595.81494 }, "end": { "local": "1980-03-23T13:23:13+08:00", "utc": "1980-03-23T05:23:13Z", "ms": 322636992595.81494 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-03-24", "window": { "start": { "local": "1980-03-24T12:34:54+08:00", "utc": "1980-03-24T04:34:54Z", "ms": 322720494486.10913 }, "end": { "local": "1980-03-24T13:22:54+08:00", "utc": "1980-03-24T05:22:54Z", "ms": 322723374486.10913 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 08:35 on Sun 23 Mar to 08:39 on Mon 24 Mar.", "fact": "1980-03-23T00:35:20Z → 1980-03-24T00:39:22Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:35–13:23 on the 23rd, 12:35–13:23 on the 24th.", "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 23rd and 0 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 14132 s" }, { "step": "ruling", "text": "Bhavānī Utpatti, Zunyi, 1980: Sunday 23 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": "1980-03-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-23", "confidence": "determinate" } ], "quote": "In Zunyi, Bhavānī Utpatti 1980 falls on Sunday 23 March. Aṣṭamī runs from 08:35 on Sun 23 Mar to 08:39 on Mon 24 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/rama-navami", "festival": "rama-navami", "name": "Rāma Navamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11079, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1980-03-24T08:39:22+08:00", "utc": "1980-03-24T00:39:22Z", "ms": 322706362086.4486 }, "end": { "local": "1980-03-25T09:29:57+08:00", "utc": "1980-03-25T01:29:57Z", "ms": 322795797187.00244 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-24T08:39:22+08:00", "utc": "1980-03-24T00:39:22Z", "ms": 322706362086.4486 }, "end": { "local": "1980-03-25T09:29:57+08:00", "utc": "1980-03-25T01:29:57Z", "ms": 322795797187.00244 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-24", "window": { "start": { "local": "1980-03-24T12:34:54+08:00", "utc": "1980-03-24T04:34:54Z", "ms": 322720494486.10913 }, "end": { "local": "1980-03-24T13:22:54+08:00", "utc": "1980-03-24T05:22:54Z", "ms": 322723374486.10913 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-03-25", "window": { "start": { "local": "1980-03-25T12:34:36+08:00", "utc": "1980-03-25T04:34:36Z", "ms": 322806876309.3297 }, "end": { "local": "1980-03-25T13:22:36+08:00", "utc": "1980-03-25T05:22:36Z", "ms": 322809756309.3297 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 08:39 on Mon 24 Mar to 09:30 on Tue 25 Mar.", "fact": "1980-03-24T00:39:22Z → 1980-03-25T01:29:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:35–13:23 on the 24th, 12:35–13:23 on the 25th.", "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 24th and 0 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11079 s" }, { "step": "ruling", "text": "Rāma Navamī, Zunyi, 1980: Monday 24 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": "1980-03-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-24", "confidence": "determinate" } ], "quote": "In Zunyi, Rāma Navamī 1980 falls on Monday 24 March. Navamī runs from 08:39 on Mon 24 Mar to 09:30 on Tue 25 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-03-27", "festival": "ekadashi", "name": "Kāmadā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15050, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-03-26T11:00:56+08:00", "utc": "1980-03-26T03:00:56Z", "ms": 322887656116.02356 }, "end": { "local": "1980-03-27T13:03:30+08:00", "utc": "1980-03-27T05:03:30Z", "ms": 322981410011.6641 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-26T11:00:56+08:00", "utc": "1980-03-26T03:00:56Z", "ms": 322887656116.02356 }, "end": { "local": "1980-03-27T13:03:30+08:00", "utc": "1980-03-27T05:03:30Z", "ms": 322981410011.6641 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-03-26", "window": { "start": { "local": "1980-03-26T06:50:06+08:00", "utc": "1980-03-25T22:50:06Z", "ms": 322872605841.1713 }, "end": { "local": "1980-03-26T06:50:06+08:00", "utc": "1980-03-25T22:50:06Z", "ms": 322872605841.1713 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-03-27", "window": { "start": { "local": "1980-03-27T06:48:58+08:00", "utc": "1980-03-26T22:48:58Z", "ms": 322958938100.9707 }, "end": { "local": "1980-03-27T06:48:58+08:00", "utc": "1980-03-26T22:48:58Z", "ms": 322958938100.9707 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:01 on Wed 26 Mar to 13:04 on Thu 27 Mar.", "fact": "1980-03-26T03:00:56Z → 1980-03-27T05:03:30Z" }, { "step": "kaala", "text": "Sunrise is at 06:50 on the 26th and 06:49 on the 27th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 26th and is 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 15050 s" }, { "step": "ruling", "text": "Kāmadā Ekādaśī, Zunyi, 1980: Thursday 27 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": "1980-03-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-27", "confidence": "determinate" } ], "quote": "In Zunyi, Kāmadā Ekādaśī 1980 falls on Thursday 27 March. Ekādaśī runs from 11:01 on Wed 26 Mar to 13:04 on Thu 27 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-03-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-03-28", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3912, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-03-28T15:27:30+08:00", "utc": "1980-03-28T07:27:30Z", "ms": 323076450018.2375 }, "end": { "local": "1980-03-29T18:02:52+08:00", "utc": "1980-03-29T10:02:52Z", "ms": 323172172235.86554 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-28T15:27:30+08:00", "utc": "1980-03-28T07:27:30Z", "ms": 323076450018.2375 }, "end": { "local": "1980-03-29T18:02:52+08:00", "utc": "1980-03-29T10:02:52Z", "ms": 323172172235.86554 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-03-28", "window": { "start": { "local": "1980-03-28T19:07:33+08:00", "utc": "1980-03-28T11:07:33Z", "ms": 323089652766.47363 }, "end": { "local": "1980-03-28T20:40:46+08:00", "utc": "1980-03-28T12:40:46Z", "ms": 323095246108.43787 } }, "covered_min": 93, "window_min": 93, "qualifies": true }, { "local_date": "1980-03-29", "window": { "start": { "local": "1980-03-29T19:08:04+08:00", "utc": "1980-03-29T11:08:04Z", "ms": 323176083903.79144 }, "end": { "local": "1980-03-29T20:41:04+08:00", "utc": "1980-03-29T12:41:04Z", "ms": 323181664097.99963 } }, "covered_min": 0, "window_min": 93, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 15:28 on Fri 28 Mar to 18:03 on Sat 29 Mar.", "fact": "1980-03-28T07:27:30Z → 1980-03-29T10:02:52Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:08–20:41 on the 28th, 19:08–20:41 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 3912 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Friday 28 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": "1980-03-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-28", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Friday 28 March. Trayodaśī runs from 15:28 on Fri 28 Mar to 18:03 on Sat 29 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-03-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ananga-trayodashi", "festival": "ananga-trayodashi", "name": "Anaṅga Trayodaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7548, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-03-28T15:27:30+08:00", "utc": "1980-03-28T07:27:30Z", "ms": 323076450018.2375 }, "end": { "local": "1980-03-29T18:02:52+08:00", "utc": "1980-03-29T10:02:52Z", "ms": 323172172235.86554 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-28T15:27:30+08:00", "utc": "1980-03-28T07:27:30Z", "ms": 323076450018.2375 }, "end": { "local": "1980-03-29T18:02:52+08:00", "utc": "1980-03-29T10:02:52Z", "ms": 323172172235.86554 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-28", "window": { "start": { "local": "1980-03-28T12:33:42+08:00", "utc": "1980-03-28T04:33:42Z", "ms": 323066021593.8416 }, "end": { "local": "1980-03-28T13:21:42+08:00", "utc": "1980-03-28T05:21:42Z", "ms": 323068901593.8416 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-29", "window": { "start": { "local": "1980-03-29T12:33:23+08:00", "utc": "1980-03-29T04:33:23Z", "ms": 323152403367.49854 }, "end": { "local": "1980-03-29T13:21:23+08:00", "utc": "1980-03-29T05:21:23Z", "ms": 323155283367.49854 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 15:28 on Fri 28 Mar to 18:03 on Sat 29 Mar.", "fact": "1980-03-28T07:27:30Z → 1980-03-29T10:02:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:34–13:22 on the 28th, 12:33–13:21 on the 29th.", "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 28th and 48 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: purvaviddha → only-day · margin 7548 s" }, { "step": "ruling", "text": "Anaṅga Trayodaśī, Zunyi, 1980: Saturday 29 March.", "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": "1980-03-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-29", "confidence": "determinate" } ], "quote": "In Zunyi, Anaṅga Trayodaśī 1980 falls on Saturday 29 March. Trayodaśī runs from 15:28 on Fri 28 Mar to 18:03 on Sat 29 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vishnu-damanaka-chaturdashi", "festival": "vishnu-damanaka-chaturdashi", "name": "Viṣṇudamanaka Caturdaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16889, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-03-29T18:02:52+08:00", "utc": "1980-03-29T10:02:52Z", "ms": 323172172235.86554 }, "end": { "local": "1980-03-30T20:40:43+08:00", "utc": "1980-03-30T12:40:43Z", "ms": 323268043173.50757 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-29T18:02:52+08:00", "utc": "1980-03-29T10:02:52Z", "ms": 323172172235.86554 }, "end": { "local": "1980-03-30T20:40:43+08:00", "utc": "1980-03-30T12:40:43Z", "ms": 323268043173.50757 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-29", "window": { "start": { "local": "1980-03-29T12:33:23+08:00", "utc": "1980-03-29T04:33:23Z", "ms": 323152403367.49854 }, "end": { "local": "1980-03-29T13:21:23+08:00", "utc": "1980-03-29T05:21:23Z", "ms": 323155283367.49854 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-30", "window": { "start": { "local": "1980-03-30T12:33:05+08:00", "utc": "1980-03-30T04:33:05Z", "ms": 323238785184.56866 }, "end": { "local": "1980-03-30T13:21:05+08:00", "utc": "1980-03-30T05:21:05Z", "ms": 323241665184.56866 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 18:03 on Sat 29 Mar to 20:41 on Sun 30 Mar.", "fact": "1980-03-29T10:02:52Z → 1980-03-30T12:40:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:33–13:21 on the 29th, 12:33–13:21 on the 30th.", "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 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 16889 s" }, { "step": "ruling", "text": "Viṣṇudamanaka Caturdaśī, Zunyi, 1980: Sunday 30 March.", "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": "1980-03-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-30", "confidence": "determinate" } ], "quote": "In Zunyi, Viṣṇudamanaka Caturdaśī 1980 falls on Sunday 30 March. Caturdaśī runs from 18:03 on Sat 29 Mar to 20:41 on Sun 30 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/chaitri-purnima", "festival": "chaitri-purnima", "name": "Caitrī Pūrṇimā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-03-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26378, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-03-30T20:40:43+08:00", "utc": "1980-03-30T12:40:43Z", "ms": 323268043173.50757 }, "end": { "local": "1980-03-31T23:13:51+08:00", "utc": "1980-03-31T15:13:51Z", "ms": 323363630578.4796 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1980-03-30T20:40:43+08:00", "utc": "1980-03-30T12:40:43Z", "ms": 323268043173.50757 }, "end": { "local": "1980-03-31T23:13:51+08:00", "utc": "1980-03-31T15:13:51Z", "ms": 323363630578.4796 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-03-30", "window": { "start": { "local": "1980-03-30T12:33:05+08:00", "utc": "1980-03-30T04:33:05Z", "ms": 323238785184.56866 }, "end": { "local": "1980-03-30T13:21:05+08:00", "utc": "1980-03-30T05:21:05Z", "ms": 323241665184.56866 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-03-31", "window": { "start": { "local": "1980-03-31T12:32:47+08:00", "utc": "1980-03-31T04:32:47Z", "ms": 323325167067.53625 }, "end": { "local": "1980-03-31T13:20:47+08:00", "utc": "1980-03-31T05:20:47Z", "ms": 323328047067.53625 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 20:41 on Sun 30 Mar to 23:14 on Mon 31 Mar.", "fact": "1980-03-30T12:40:43Z → 1980-03-31T15:13:51Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:33–13:21 on the 30th, 12:33–13:21 on the 31st.", "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 30th and 48 of 48 on the 31st.", "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 26378 s" }, { "step": "ruling", "text": "Caitrī Pūrṇimā, Zunyi, 1980: Monday 31 March.", "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": "1980-03-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-03-31", "confidence": "determinate" } ], "quote": "In Zunyi, Caitrī Pūrṇimā 1980 falls on Monday 31 March. Pūrṇimā runs from 20:41 on Sun 30 Mar to 23:14 on Mon 31 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-04-04", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28911, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-04-04T05:34:03+08:00", "utc": "1980-04-03T21:34:03Z", "ms": 323645643250.0928 }, "end": { "local": "1980-04-05T07:00:47+08:00", "utc": "1980-04-04T23:00:47Z", "ms": 323737246913.2633 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-04T05:34:03+08:00", "utc": "1980-04-03T21:34:03Z", "ms": 323645643250.0928 }, "end": { "local": "1980-04-05T07:00:47+08:00", "utc": "1980-04-04T23:00:47Z", "ms": 323737246913.2633 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-04-03", "window": { "start": { "local": "1980-04-03T21:32:12+08:00", "utc": "1980-04-03T13:32:12Z", "ms": 323616732210.41626 }, "end": { "local": "1980-04-03T21:32:12+08:00", "utc": "1980-04-03T13:32:12Z", "ms": 323616732210.41626 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-04-04", "window": { "start": { "local": "1980-04-04T22:25:28+08:00", "utc": "1980-04-04T14:25:28Z", "ms": 323706327629.512 }, "end": { "local": "1980-04-04T22:25:28+08:00", "utc": "1980-04-04T14:25:28Z", "ms": 323706327629.512 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:34 on Fri 4 Apr to 07:01 on Sat 5 Apr.", "fact": "1980-04-03T21:34:03Z → 1980-04-04T23:00:47Z" }, { "step": "kaala", "text": "Moonrise is at 21:32 on the 3rd and 22:25 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 28911 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Friday 4 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-04-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-04", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Friday 4 April. Caturthī runs from 05:34 on Fri 4 Apr to 07:01 on Sat 5 Apr and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-04-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-04-11", "festival": "ekadashi", "name": "Varūthinī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8190, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-04-11T04:15:56+08:00", "utc": "1980-04-10T20:15:56Z", "ms": 324245756001.005 }, "end": { "local": "1980-04-12T01:40:21+08:00", "utc": "1980-04-11T17:40:21Z", "ms": 324322821180.2932 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-11T04:15:56+08:00", "utc": "1980-04-10T20:15:56Z", "ms": 324245756001.005 }, "end": { "local": "1980-04-12T01:40:21+08:00", "utc": "1980-04-11T17:40:21Z", "ms": 324322821180.2932 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-04-11", "window": { "start": { "local": "1980-04-11T06:32:26+08:00", "utc": "1980-04-10T22:32:26Z", "ms": 324253945623.39935 }, "end": { "local": "1980-04-11T06:32:26+08:00", "utc": "1980-04-10T22:32:26Z", "ms": 324253945623.39935 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-04-12", "window": { "start": { "local": "1980-04-12T06:31:22+08:00", "utc": "1980-04-11T22:31:22Z", "ms": 324340282328.4877 }, "end": { "local": "1980-04-12T06:31:22+08:00", "utc": "1980-04-11T22:31:22Z", "ms": 324340282328.4877 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 04:16 on Fri 11 Apr to 01:40 on Sat 12 Apr.", "fact": "1980-04-10T20:15:56Z → 1980-04-11T17:40:21Z" }, { "step": "kaala", "text": "Sunrise is at 06:32 on the 11th and 06:31 on the 12th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 11th and is not on the 12th.", "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 8190 s" }, { "step": "ruling", "text": "Varūthinī Ekādaśī, Zunyi, 1980: Friday 11 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": "1980-04-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-11", "confidence": "determinate" } ], "quote": "In Zunyi, Varūthinī Ekādaśī 1980 falls on Friday 11 April. Ekādaśī runs from 04:16 on Fri 11 Apr to 01:40 on Sat 12 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-04-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-04-12", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-12", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 430, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-04-12T22:35:30+08:00", "utc": "1980-04-12T14:35:30Z", "ms": 324398130279.67017 }, "end": { "local": "1980-04-13T19:08:45+08:00", "utc": "1980-04-13T11:08:45Z", "ms": 324472125371.6832 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-12T22:35:30+08:00", "utc": "1980-04-12T14:35:30Z", "ms": 324398130279.67017 }, "end": { "local": "1980-04-13T19:08:45+08:00", "utc": "1980-04-13T11:08:45Z", "ms": 324472125371.6832 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-04-12", "window": { "start": { "local": "1980-04-12T19:15:23+08:00", "utc": "1980-04-12T11:15:23Z", "ms": 324386122972.26215 }, "end": { "local": "1980-04-12T20:45:23+08:00", "utc": "1980-04-12T12:45:23Z", "ms": 324391522515.05096 } }, "covered_min": 0, "window_min": 90, "qualifies": false }, { "local_date": "1980-04-13", "window": { "start": { "local": "1980-04-13T19:15:55+08:00", "utc": "1980-04-13T11:15:55Z", "ms": 324472555026.649 }, "end": { "local": "1980-04-13T20:45:42+08:00", "utc": "1980-04-13T12:45:42Z", "ms": 324477941995.1075 } }, "covered_min": 0, "window_min": 90, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 22:36 on Sat 12 Apr to 19:09 on Sun 13 Apr.", "fact": "1980-04-12T14:35:30Z → 1980-04-13T11:08:45Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:15–20:45 on the 12th, 19:16–20:46 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 0 of 90 minutes on the 12th and 0 of 90 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither evening qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 430 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Saturday 12 April.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-04-12", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-12", "confidence": "boundary" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Saturday 12 April. Trayodaśī runs from 22:36 on Sat 12 Apr to 19:09 on Sun 13 Apr, and reaches pradoṣa on neither day.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-04-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/vaishakhi", "festival": "vaishakhi", "name": "Vaiśākhī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37247, "anga": { "type": "sankranti", "index": 0, "key": "mesha", "name": "Meṣa", "start": { "local": "1980-04-13T16:51:06+08:00", "utc": "1980-04-13T08:51:06Z", "ms": 324463866104.73267 }, "end": { "local": "1980-05-14T13:46:20+08:00", "utc": "1980-05-14T05:46:20Z", "ms": 327131179651.1107 } }, "span": { "of": "transit", "start": { "local": "1980-04-13T16:51:06+08:00", "utc": "1980-04-13T08:51:06Z", "ms": 324463866104.73267 }, "end": { "local": "1980-04-13T16:51:06+08:00", "utc": "1980-04-13T08:51:06Z", "ms": 324463866104.73267 } }, "kaala": "day", "days": [ { "local_date": "1980-04-12", "window": { "start": { "local": "1980-04-12T06:31:22+08:00", "utc": "1980-04-11T22:31:22Z", "ms": 324340282328.4877 }, "end": { "local": "1980-04-13T06:30:20+08:00", "utc": "1980-04-12T22:30:20Z", "ms": 324426619543.1783 } }, "covered_min": 0, "window_min": 1439, "qualifies": false }, { "local_date": "1980-04-13", "window": { "start": { "local": "1980-04-13T06:30:20+08:00", "utc": "1980-04-12T22:30:20Z", "ms": 324426619543.1783 }, "end": { "local": "1980-04-14T06:29:17+08:00", "utc": "1980-04-13T22:29:17Z", "ms": 324512957290.08765 } }, "covered_min": 1, "window_min": 1439, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Meṣa at 16:51 on Sun 13 Apr.", "fact": "1980-04-13T08:51:06Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 06:31 on the 12th, and from 06:30 on the 13th.", "fact": "day: sunrise-to-sunrise · sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from sunrise. The transit falls on the 13th, not the 12th.", "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 37247 s" }, { "step": "ruling", "text": "Vaiśākhī, Zunyi, 1980: Sunday 13 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "vaishakhi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Mesadi — Cadaka puja (Bengal), Bahag Bihu (Assam), Cheiraoba (Manipur), Visu (T. C. State), Vaisakhi (on the samkramana day commencing from sunrise)." }, { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } ], "not_evaluated": "The other names in the row (Cadaka puja, Bahag Bihu, Cheiraoba, Visu) are regional observances and wait with the regional rows.", "rashi": "Meṣa", "day_from": "sunrise" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-04-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-13", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1980-04-13", "statement": "Counted from midnight", "reference": { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } }, { "kind": "reckoning", "id": "sunset-rule", "local_date": "1980-04-13", "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 Zunyi, Vaiśākhī 1980 falls on Sunday 13 April. The Sun enters Meṣa at 16:51 on Sun 13 Apr, and the rule counts the day from sunrise.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/shivaratri?on=1980-04-13", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19191, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-04-13T19:08:45+08:00", "utc": "1980-04-13T11:08:45Z", "ms": 324472125371.6832 }, "end": { "local": "1980-04-14T15:29:00+08:00", "utc": "1980-04-14T07:29:00Z", "ms": 324545339786.4626 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-13T19:08:45+08:00", "utc": "1980-04-13T11:08:45Z", "ms": 324472125371.6832 }, "end": { "local": "1980-04-14T15:29:00+08:00", "utc": "1980-04-14T07:29:00Z", "ms": 324545339786.4626 } }, "kaala": "nishita", "days": [ { "local_date": "1980-04-13", "window": { "start": { "local": "1980-04-14T00:28:36+08:00", "utc": "1980-04-13T16:28:36Z", "ms": 324491316158.3683 }, "end": { "local": "1980-04-14T01:16:36+08:00", "utc": "1980-04-13T17:16:36Z", "ms": 324494196158.3683 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-04-14", "window": { "start": { "local": "1980-04-15T00:28:21+08:00", "utc": "1980-04-14T16:28:21Z", "ms": 324577701399.4237 }, "end": { "local": "1980-04-15T01:16:21+08:00", "utc": "1980-04-14T17:16:21Z", "ms": 324580581399.4237 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 19:09 on Sun 13 Apr to 15:29 on Mon 14 Apr.", "fact": "1980-04-13T11:08:45Z → 1980-04-14T07:29:00Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:29–01:17 on the 13th, 00:28–01:16 on the 14th.", "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 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 19191 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Sunday 13 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-04-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-13", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Sunday 13 April. Caturdaśī runs from 19:09 on Sun 13 Apr to 15:29 on Mon 14 Apr and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-04-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/akshaya-tritiya", "festival": "akshaya-tritiya", "name": "Akṣaya Tṛtīyā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5493, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-04-17T04:54:41+08:00", "utc": "1980-04-16T20:54:41Z", "ms": 324766480929.6328 }, "end": { "local": "1980-04-18T02:07:30+08:00", "utc": "1980-04-17T18:07:30Z", "ms": 324842849535.372 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-17T04:54:41+08:00", "utc": "1980-04-16T20:54:41Z", "ms": 324766480929.6328 }, "end": { "local": "1980-04-18T02:07:30+08:00", "utc": "1980-04-17T18:07:30Z", "ms": 324842849535.372 } }, "kaala": "purvahna", "days": [ { "local_date": "1980-04-17", "window": { "start": { "local": "1980-04-17T06:26:14+08:00", "utc": "1980-04-16T22:26:14Z", "ms": 324771973936.90125 }, "end": { "local": "1980-04-17T10:43:31+08:00", "utc": "1980-04-17T02:43:31Z", "ms": 324787410794.5091 } }, "covered_min": 257, "window_min": 257, "qualifies": true }, { "local_date": "1980-04-18", "window": { "start": { "local": "1980-04-18T06:25:14+08:00", "utc": "1980-04-17T22:25:14Z", "ms": 324858314024.5444 }, "end": { "local": "1980-04-18T10:43:02+08:00", "utc": "1980-04-18T02:43:02Z", "ms": 324873781746.7968 } }, "covered_min": 0, "window_min": 258, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 04:55 on Thu 17 Apr to 02:07 on Fri 18 Apr.", "fact": "1980-04-16T20:54:41Z → 1980-04-17T18:07:30Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:26–10:44 on the 17th, 06:25–10:43 on the 18th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pūrvāhṇa. It covers 257 of 257 minutes on the 17th and 0 of 258 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one forenoon qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 5493 s" }, { "step": "ruling", "text": "Akṣaya Tṛtīyā, Zunyi, 1980: Thursday 17 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": "1980-04-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-17", "confidence": "determinate" } ], "quote": "In Zunyi, Akṣaya Tṛtīyā 1980 falls on Thursday 17 April. Tṛtīyā runs from 04:55 on Thu 17 Apr to 02:07 on Fri 18 Apr and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/parashurama-jayanti", "festival": "parashurama-jayanti", "name": "Paraśurāma Jayantī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19228, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-04-17T04:54:41+08:00", "utc": "1980-04-16T20:54:41Z", "ms": 324766480929.6328 }, "end": { "local": "1980-04-18T02:07:30+08:00", "utc": "1980-04-17T18:07:30Z", "ms": 324842849535.372 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-17T04:54:41+08:00", "utc": "1980-04-16T20:54:41Z", "ms": 324766480929.6328 }, "end": { "local": "1980-04-18T02:07:30+08:00", "utc": "1980-04-17T18:07:30Z", "ms": 324842849535.372 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-04-16", "window": { "start": { "local": "1980-04-16T19:17:32+08:00", "utc": "1980-04-16T11:17:32Z", "ms": 324731851950.9442 }, "end": { "local": "1980-04-16T20:46:42+08:00", "utc": "1980-04-16T12:46:42Z", "ms": 324737201549.07184 } }, "covered_min": 0, "window_min": 89, "qualifies": false }, { "local_date": "1980-04-17", "window": { "start": { "local": "1980-04-17T19:18:05+08:00", "utc": "1980-04-17T11:18:05Z", "ms": 324818284509.7248 }, "end": { "local": "1980-04-17T20:47:02+08:00", "utc": "1980-04-17T12:47:02Z", "ms": 324823621778.36743 } }, "covered_min": 89, "window_min": 89, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 04:55 on Thu 17 Apr to 02:07 on Fri 18 Apr.", "fact": "1980-04-16T20:54:41Z → 1980-04-17T18:07:30Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:18–20:47 on the 16th, 19:18–20:47 on the 17th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pradoṣa. It covers 0 of 89 minutes on the 16th and 89 of 89 on the 17th.", "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 19228 s" }, { "step": "ruling", "text": "Paraśurāma Jayantī, Zunyi, 1980: Thursday 17 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": "1980-04-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-17", "confidence": "determinate" } ], "quote": "In Zunyi, Paraśurāma Jayantī 1980 falls on Thursday 17 April. Tṛtīyā runs from 04:55 on Thu 17 Apr to 02:07 on Fri 18 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-04-18", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37226, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-04-18T02:07:30+08:00", "utc": "1980-04-17T18:07:30Z", "ms": 324842849535.372 }, "end": { "local": "1980-04-18T23:59:13+08:00", "utc": "1980-04-18T15:59:13Z", "ms": 324921553023.0044 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-18T02:07:30+08:00", "utc": "1980-04-17T18:07:30Z", "ms": 324842849535.372 }, "end": { "local": "1980-04-18T23:59:13+08:00", "utc": "1980-04-18T15:59:13Z", "ms": 324921553023.0044 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-04-18", "window": { "start": { "local": "1980-04-18T12:27:56+08:00", "utc": "1980-04-18T04:27:56Z", "ms": 324880075607.923 }, "end": { "local": "1980-04-18T13:15:56+08:00", "utc": "1980-04-18T05:15:56Z", "ms": 324882955607.923 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-04-19", "window": { "start": { "local": "1980-04-19T12:27:42+08:00", "utc": "1980-04-19T04:27:42Z", "ms": 324966462372.8009 }, "end": { "local": "1980-04-19T13:15:42+08:00", "utc": "1980-04-19T05:15:42Z", "ms": 324969342372.8009 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:07 on Fri 18 Apr to 23:59 on Fri 18 Apr.", "fact": "1980-04-17T18:07:30Z → 1980-04-18T15:59:13Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:28–13:16 on the 18th, 12:28–13:16 on the 19th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 18th and 0 of 48 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 37226 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Friday 18 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-04-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-18", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Friday 18 April. Caturthī runs from 02:07 on Fri 18 Apr to 23:59 on Fri 18 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-04-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shankara-jayanti", "festival": "shankara-jayanti", "name": "Śaṅkara Jayantī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33714, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-04-18T23:59:13+08:00", "utc": "1980-04-18T15:59:13Z", "ms": 324921553023.0044 }, "end": { "local": "1980-04-19T22:37:37+08:00", "utc": "1980-04-19T14:37:37Z", "ms": 325003056545.2144 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-18T23:59:13+08:00", "utc": "1980-04-18T15:59:13Z", "ms": 324921553023.0044 }, "end": { "local": "1980-04-19T22:37:37+08:00", "utc": "1980-04-19T14:37:37Z", "ms": 325003056545.2144 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-04-18", "window": { "start": { "local": "1980-04-18T12:27:56+08:00", "utc": "1980-04-18T04:27:56Z", "ms": 324880075607.923 }, "end": { "local": "1980-04-18T13:15:56+08:00", "utc": "1980-04-18T05:15:56Z", "ms": 324882955607.923 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-04-19", "window": { "start": { "local": "1980-04-19T12:27:42+08:00", "utc": "1980-04-19T04:27:42Z", "ms": 324966462372.8009 }, "end": { "local": "1980-04-19T13:15:42+08:00", "utc": "1980-04-19T05:15:42Z", "ms": 324969342372.8009 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 23:59 on Fri 18 Apr to 22:38 on Sat 19 Apr.", "fact": "1980-04-18T15:59:13Z → 1980-04-19T14:37:37Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:28–13:16 on the 18th, 12:28–13:16 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. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33714 s" }, { "step": "ruling", "text": "Śaṅkara Jayantī, Zunyi, 1980: Saturday 19 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shankara-jayanti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Sankara jayanti." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-04-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-19", "confidence": "determinate" } ], "quote": "In Zunyi, Śaṅkara Jayantī 1980 falls on Saturday 19 April. Pañcamī runs from 23:59 on Fri 18 Apr to 22:38 on Sat 19 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/gangotpatti", "festival": "gangotpatti", "name": "Gaṅgotpatti", "everyday": "Ganga Saptami", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31919, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1980-04-20T22:07:29+08:00", "utc": "1980-04-20T14:07:29Z", "ms": 325087648784.8353 }, "end": { "local": "1980-04-21T22:29:41+08:00", "utc": "1980-04-21T14:29:41Z", "ms": 325175380764.8324 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-20T22:07:29+08:00", "utc": "1980-04-20T14:07:29Z", "ms": 325087648784.8353 }, "end": { "local": "1980-04-21T22:29:41+08:00", "utc": "1980-04-21T14:29:41Z", "ms": 325175380764.8324 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-04-20", "window": { "start": { "local": "1980-04-20T12:27:30+08:00", "utc": "1980-04-20T04:27:30Z", "ms": 325052849529.12103 }, "end": { "local": "1980-04-20T13:15:30+08:00", "utc": "1980-04-20T05:15:30Z", "ms": 325055729529.12103 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-04-21", "window": { "start": { "local": "1980-04-21T12:27:17+08:00", "utc": "1980-04-21T04:27:17Z", "ms": 325139237088.70966 }, "end": { "local": "1980-04-21T13:15:17+08:00", "utc": "1980-04-21T05:15:17Z", "ms": 325142117088.70966 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 22:07 on Sun 20 Apr to 22:30 on Mon 21 Apr.", "fact": "1980-04-20T14:07:29Z → 1980-04-21T14:29:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:27–13:15 on the 20th, 12:27–13:15 on the 21st.", "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 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 31919 s" }, { "step": "ruling", "text": "Gaṅgotpatti, Zunyi, 1980: Monday 21 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": "1980-04-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-21", "confidence": "determinate" } ], "quote": "In Zunyi, Gaṅgotpatti (Ganga Saptami) 1980 falls on Monday 21 April. Saptamī runs from 22:07 on Sun 20 Apr to 22:30 on Mon 21 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-04-26", "festival": "ekadashi", "name": "Mohinī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 472, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-04-25T03:50:57+08:00", "utc": "1980-04-24T19:50:57Z", "ms": 325453856608.87366 }, "end": { "local": "1980-04-26T06:25:32+08:00", "utc": "1980-04-25T22:25:32Z", "ms": 325549531947.2226 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-25T03:50:57+08:00", "utc": "1980-04-24T19:50:57Z", "ms": 325453856608.87366 }, "end": { "local": "1980-04-26T06:25:32+08:00", "utc": "1980-04-25T22:25:32Z", "ms": 325549531947.2226 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-04-25", "window": { "start": { "local": "1980-04-25T06:18:34+08:00", "utc": "1980-04-24T22:18:34Z", "ms": 325462713866.5062 }, "end": { "local": "1980-04-25T06:18:34+08:00", "utc": "1980-04-24T22:18:34Z", "ms": 325462713866.5062 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-04-26", "window": { "start": { "local": "1980-04-26T06:17:40+08:00", "utc": "1980-04-25T22:17:40Z", "ms": 325549059743.7782 }, "end": { "local": "1980-04-26T06:17:40+08:00", "utc": "1980-04-25T22:17:40Z", "ms": 325549059743.7782 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:51 on Fri 25 Apr to 06:26 on Sat 26 Apr.", "fact": "1980-04-24T19:50:57Z → 1980-04-25T22:25:32Z" }, { "step": "kaala", "text": "Sunrise is at 06:19 on the 25th and 06:18 on the 26th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 25th and is on the 26th.", "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 472 s" }, { "step": "ruling", "text": "Mohinī Ekādaśī, Zunyi, 1980: Saturday 26 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": "1980-04-26", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-26", "confidence": "determinate" } ], "quote": "In Zunyi, Mohinī Ekādaśī 1980 falls on Saturday 26 April. Ekādaśī runs from 03:51 on Fri 25 Apr to 06:26 on Sat 26 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-04-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/parashurama-dvadashi", "festival": "parashurama-dvadashi", "name": "Paraśurāma Dvādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12230, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-04-26T06:25:32+08:00", "utc": "1980-04-25T22:25:32Z", "ms": 325549531947.2226 }, "end": { "local": "1980-04-27T09:02:21+08:00", "utc": "1980-04-27T01:02:21Z", "ms": 325645341409.3875 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-26T06:25:32+08:00", "utc": "1980-04-25T22:25:32Z", "ms": 325549531947.2226 }, "end": { "local": "1980-04-27T09:02:21+08:00", "utc": "1980-04-27T01:02:21Z", "ms": 325645341409.3875 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-04-26", "window": { "start": { "local": "1980-04-26T12:26:21+08:00", "utc": "1980-04-26T04:26:21Z", "ms": 325571181373.02856 }, "end": { "local": "1980-04-26T13:14:21+08:00", "utc": "1980-04-26T05:14:21Z", "ms": 325574061373.02856 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-04-27", "window": { "start": { "local": "1980-04-27T12:26:12+08:00", "utc": "1980-04-27T04:26:12Z", "ms": 325657571615.47327 }, "end": { "local": "1980-04-27T13:14:12+08:00", "utc": "1980-04-27T05:14:12Z", "ms": 325660451615.47327 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 06:26 on Sat 26 Apr to 09:02 on Sun 27 Apr.", "fact": "1980-04-25T22:25:32Z → 1980-04-27T01:02:21Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:26–13:14 on the 26th, 12:26–13:14 on the 27th.", "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 26th and 0 of 48 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 12230 s" }, { "step": "ruling", "text": "Paraśurāma Dvādaśī, Zunyi, 1980: Saturday 26 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": "1980-04-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-26", "confidence": "determinate" } ], "quote": "In Zunyi, Paraśurāma Dvādaśī 1980 falls on Saturday 26 April. Dvādaśī runs from 06:26 on Sat 26 Apr to 09:02 on Sun 27 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/rukmini-dvadashi", "festival": "rukmini-dvadashi", "name": "Rukmiṇī Dvādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12230, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-04-26T06:25:32+08:00", "utc": "1980-04-25T22:25:32Z", "ms": 325549531947.2226 }, "end": { "local": "1980-04-27T09:02:21+08:00", "utc": "1980-04-27T01:02:21Z", "ms": 325645341409.3875 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-26T06:25:32+08:00", "utc": "1980-04-25T22:25:32Z", "ms": 325549531947.2226 }, "end": { "local": "1980-04-27T09:02:21+08:00", "utc": "1980-04-27T01:02:21Z", "ms": 325645341409.3875 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-04-26", "window": { "start": { "local": "1980-04-26T12:26:21+08:00", "utc": "1980-04-26T04:26:21Z", "ms": 325571181373.02856 }, "end": { "local": "1980-04-26T13:14:21+08:00", "utc": "1980-04-26T05:14:21Z", "ms": 325574061373.02856 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-04-27", "window": { "start": { "local": "1980-04-27T12:26:12+08:00", "utc": "1980-04-27T04:26:12Z", "ms": 325657571615.47327 }, "end": { "local": "1980-04-27T13:14:12+08:00", "utc": "1980-04-27T05:14:12Z", "ms": 325660451615.47327 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 06:26 on Sat 26 Apr to 09:02 on Sun 27 Apr.", "fact": "1980-04-25T22:25:32Z → 1980-04-27T01:02:21Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:26–13:14 on the 26th, 12:26–13:14 on the 27th.", "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 26th and 0 of 48 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 12230 s" }, { "step": "ruling", "text": "Rukmiṇī Dvādaśī, Zunyi, 1980: Saturday 26 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": "1980-04-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-26", "confidence": "determinate" } ], "quote": "In Zunyi, Rukmiṇī Dvādaśī 1980 falls on Saturday 26 April. Dvādaśī runs from 06:26 on Sat 26 Apr to 09:02 on Sun 27 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-04-27", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28404, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-04-27T09:02:21+08:00", "utc": "1980-04-27T01:02:21Z", "ms": 325645341409.3875 }, "end": { "local": "1980-04-28T11:30:47+08:00", "utc": "1980-04-28T03:30:47Z", "ms": 325740646932.72833 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-27T09:02:21+08:00", "utc": "1980-04-27T01:02:21Z", "ms": 325645341409.3875 }, "end": { "local": "1980-04-28T11:30:47+08:00", "utc": "1980-04-28T03:30:47Z", "ms": 325740646932.72833 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-04-27", "window": { "start": { "local": "1980-04-27T19:23:37+08:00", "utc": "1980-04-27T11:23:37Z", "ms": 325682616773.6209 }, "end": { "local": "1980-04-27T20:50:35+08:00", "utc": "1980-04-27T12:50:35Z", "ms": 325687835074.7901 } }, "covered_min": 87, "window_min": 87, "qualifies": true }, { "local_date": "1980-04-28", "window": { "start": { "local": "1980-04-28T19:24:11+08:00", "utc": "1980-04-28T11:24:11Z", "ms": 325769050664.9246 }, "end": { "local": "1980-04-28T20:50:58+08:00", "utc": "1980-04-28T12:50:58Z", "ms": 325774257575.48413 } }, "covered_min": 0, "window_min": 87, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 09:02 on Sun 27 Apr to 11:31 on Mon 28 Apr.", "fact": "1980-04-27T01:02:21Z → 1980-04-28T03:30:47Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:24–20:51 on the 27th, 19:24–20:51 on the 28th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 87 of 87 minutes on the 27th and 0 of 87 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 28404 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Sunday 27 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": "1980-04-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-27", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Sunday 27 April. Trayodaśī runs from 09:02 on Sun 27 Apr to 11:31 on Mon 28 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-04-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/nrisimha-chaturdashi", "festival": "nrisimha-chaturdashi", "name": "Nṛsiṃha Caturdaśī", "everyday": "Narasimha Jayanti", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20489, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-04-28T11:30:47+08:00", "utc": "1980-04-28T03:30:47Z", "ms": 325740646932.72833 }, "end": { "local": "1980-04-29T13:43:15+08:00", "utc": "1980-04-29T05:43:15Z", "ms": 325834995379.6414 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-28T11:30:47+08:00", "utc": "1980-04-28T03:30:47Z", "ms": 325740646932.72833 }, "end": { "local": "1980-04-29T13:43:15+08:00", "utc": "1980-04-29T05:43:15Z", "ms": 325834995379.6414 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-04-28", "window": { "start": { "local": "1980-04-28T19:24:11+08:00", "utc": "1980-04-28T11:24:11Z", "ms": 325769050664.9246 }, "end": { "local": "1980-04-28T20:50:58+08:00", "utc": "1980-04-28T12:50:58Z", "ms": 325774257575.48413 } }, "covered_min": 87, "window_min": 87, "qualifies": true }, { "local_date": "1980-04-29", "window": { "start": { "local": "1980-04-29T19:24:45+08:00", "utc": "1980-04-29T11:24:45Z", "ms": 325855484674.8582 }, "end": { "local": "1980-04-29T20:51:20+08:00", "utc": "1980-04-29T12:51:20Z", "ms": 325860680300.54877 } }, "covered_min": 0, "window_min": 87, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 11:31 on Mon 28 Apr to 13:43 on Tue 29 Apr.", "fact": "1980-04-28T03:30:47Z → 1980-04-29T05:43:15Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:24–20:51 on the 28th, 19:25–20:51 on the 29th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 87 of 87 minutes on the 28th and 0 of 87 on the 29th.", "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 20489 s" }, { "step": "ruling", "text": "Nṛsiṃha Caturdaśī, Zunyi, 1980: Monday 28 April.", "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": "1980-04-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-28", "confidence": "determinate" } ], "quote": "In Zunyi, Nṛsiṃha Caturdaśī (Narasimha Jayanti) 1980 falls on Monday 28 April. Caturdaśī runs from 11:31 on Mon 28 Apr to 13:43 on Tue 29 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/buddha-purnima", "festival": "buddha-purnima", "name": "Buddha Pūrṇimā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1762, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-04-29T13:43:15+08:00", "utc": "1980-04-29T05:43:15Z", "ms": 325834995379.6414 }, "end": { "local": "1980-04-30T15:35:16+08:00", "utc": "1980-04-30T07:35:16Z", "ms": 325928116339.8103 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-29T13:43:15+08:00", "utc": "1980-04-29T05:43:15Z", "ms": 325834995379.6414 }, "end": { "local": "1980-04-30T15:35:16+08:00", "utc": "1980-04-30T07:35:16Z", "ms": 325928116339.8103 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-04-29", "window": { "start": { "local": "1980-04-29T12:25:54+08:00", "utc": "1980-04-29T04:25:54Z", "ms": 325830353584.4895 }, "end": { "local": "1980-04-29T13:13:54+08:00", "utc": "1980-04-29T05:13:54Z", "ms": 325833233584.4895 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-04-30", "window": { "start": { "local": "1980-04-30T12:25:45+08:00", "utc": "1980-04-30T04:25:45Z", "ms": 325916745334.54346 }, "end": { "local": "1980-04-30T13:13:45+08:00", "utc": "1980-04-30T05:13:45Z", "ms": 325919625334.54346 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 13:43 on Tue 29 Apr to 15:35 on Wed 30 Apr.", "fact": "1980-04-29T05:43:15Z → 1980-04-30T07:35:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:26–13:14 on the 29th, 12:26–13:14 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: unstated → only-day · margin 1762 s" }, { "step": "ruling", "text": "Buddha Pūrṇimā, Zunyi, 1980: Wednesday 30 April.", "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": "1980-04-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-30", "confidence": "boundary" } ], "quote": "In Zunyi, Buddha Pūrṇimā 1980 falls on Wednesday 30 April. Pūrṇimā runs from 13:43 on Tue 29 Apr to 15:35 on Wed 30 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sampat-gauri-vrata", "festival": "sampat-gauri-vrata", "name": "Sampat Gaurī Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-04-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1762, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-04-29T13:43:15+08:00", "utc": "1980-04-29T05:43:15Z", "ms": 325834995379.6414 }, "end": { "local": "1980-04-30T15:35:16+08:00", "utc": "1980-04-30T07:35:16Z", "ms": 325928116339.8103 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1980-04-29T13:43:15+08:00", "utc": "1980-04-29T05:43:15Z", "ms": 325834995379.6414 }, "end": { "local": "1980-04-30T15:35:16+08:00", "utc": "1980-04-30T07:35:16Z", "ms": 325928116339.8103 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-04-29", "window": { "start": { "local": "1980-04-29T12:25:54+08:00", "utc": "1980-04-29T04:25:54Z", "ms": 325830353584.4895 }, "end": { "local": "1980-04-29T13:13:54+08:00", "utc": "1980-04-29T05:13:54Z", "ms": 325833233584.4895 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-04-30", "window": { "start": { "local": "1980-04-30T12:25:45+08:00", "utc": "1980-04-30T04:25:45Z", "ms": 325916745334.54346 }, "end": { "local": "1980-04-30T13:13:45+08:00", "utc": "1980-04-30T05:13:45Z", "ms": 325919625334.54346 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 13:43 on Tue 29 Apr to 15:35 on Wed 30 Apr.", "fact": "1980-04-29T05:43:15Z → 1980-04-30T07:35:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:26–13:14 on the 29th, 12:26–13:14 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 1762 s" }, { "step": "ruling", "text": "Sampat Gaurī Vrata, Zunyi, 1980: Wednesday 30 April.", "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": "1980-04-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-04-30", "confidence": "determinate" } ], "quote": "In Zunyi, Sampat Gaurī Vrata 1980 falls on Wednesday 30 April. Pūrṇimā runs from 13:43 on Tue 29 Apr to 15:35 on Wed 30 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-05-03", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-05-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11808, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-05-03T18:53:24+08:00", "utc": "1980-05-03T10:53:24Z", "ms": 326199203540.33655 }, "end": { "local": "1980-05-04T19:11:59+08:00", "utc": "1980-05-04T11:11:59Z", "ms": 326286719321.3617 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-05-03T18:53:24+08:00", "utc": "1980-05-03T10:53:24Z", "ms": 326199203540.33655 }, "end": { "local": "1980-05-04T19:11:59+08:00", "utc": "1980-05-04T11:11:59Z", "ms": 326286719321.3617 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-05-03", "window": { "start": { "local": "1980-05-03T22:10:11+08:00", "utc": "1980-05-03T14:10:11Z", "ms": 326211011366.47723 }, "end": { "local": "1980-05-03T22:10:11+08:00", "utc": "1980-05-03T14:10:11Z", "ms": 326211011366.47723 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-05-04", "window": { "start": { "local": "1980-05-04T23:04:23+08:00", "utc": "1980-05-04T15:04:23Z", "ms": 326300663472.14923 }, "end": { "local": "1980-05-04T23:04:23+08:00", "utc": "1980-05-04T15:04:23Z", "ms": 326300663472.14923 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:53 on Sat 3 May to 19:12 on Sun 4 May.", "fact": "1980-05-03T10:53:24Z → 1980-05-04T11:11:59Z" }, { "step": "kaala", "text": "Moonrise is at 22:10 on the 3rd and 23:04 on the 4th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī 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. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11808 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Saturday 3 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": "1980-05-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-05-03", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Saturday 3 May. Caturthī runs from 18:53 on Sat 3 May to 19:12 on Sun 4 May and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-05-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-05-11", "festival": "ekadashi", "name": "Aparā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-05-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9748, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-05-10T11:37:26+08:00", "utc": "1980-05-10T03:37:26Z", "ms": 326777846190.9315 }, "end": { "local": "1980-05-11T08:48:30+08:00", "utc": "1980-05-11T00:48:30Z", "ms": 326854109570.3837 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-05-10T11:37:26+08:00", "utc": "1980-05-10T03:37:26Z", "ms": 326777846190.9315 }, "end": { "local": "1980-05-11T08:48:30+08:00", "utc": "1980-05-11T00:48:30Z", "ms": 326854109570.3837 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-05-10", "window": { "start": { "local": "1980-05-10T06:06:41+08:00", "utc": "1980-05-09T22:06:41Z", "ms": 326758001009.68585 }, "end": { "local": "1980-05-10T06:06:41+08:00", "utc": "1980-05-09T22:06:41Z", "ms": 326758001009.68585 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-05-11", "window": { "start": { "local": "1980-05-11T06:06:02+08:00", "utc": "1980-05-10T22:06:02Z", "ms": 326844361946.18195 }, "end": { "local": "1980-05-11T06:06:02+08:00", "utc": "1980-05-10T22:06:02Z", "ms": 326844361946.18195 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:37 on Sat 10 May to 08:48 on Sun 11 May.", "fact": "1980-05-10T03:37:26Z → 1980-05-11T00:48:30Z" }, { "step": "kaala", "text": "Sunrise is at 06:07 on the 10th and 06:06 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 9748 s" }, { "step": "ruling", "text": "Aparā Ekādaśī, Zunyi, 1980: Sunday 11 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": "1980-05-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-05-11", "confidence": "determinate" } ], "quote": "In Zunyi, Aparā Ekādaśī 1980 falls on Sunday 11 May. Ekādaśī runs from 11:37 on Sat 10 May to 08:48 on Sun 11 May and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-05-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-05-12", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-05-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19759, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-05-12T05:42:09+08:00", "utc": "1980-05-11T21:42:09Z", "ms": 326929328942.96826 }, "end": { "local": "1980-05-13T02:25:54+08:00", "utc": "1980-05-12T18:25:54Z", "ms": 327003954234.607 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-05-12T05:42:09+08:00", "utc": "1980-05-11T21:42:09Z", "ms": 326929328942.96826 }, "end": { "local": "1980-05-13T02:25:54+08:00", "utc": "1980-05-12T18:25:54Z", "ms": 327003954234.607 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-05-11", "window": { "start": { "local": "1980-05-11T19:31:40+08:00", "utc": "1980-05-11T11:31:40Z", "ms": 326892700405.4794 }, "end": { "local": "1980-05-11T20:56:10+08:00", "utc": "1980-05-11T12:56:10Z", "ms": 326897770224.86176 } }, "covered_min": 0, "window_min": 84, "qualifies": false }, { "local_date": "1980-05-12", "window": { "start": { "local": "1980-05-12T19:32:15+08:00", "utc": "1980-05-12T11:32:15Z", "ms": 326979135394.9385 }, "end": { "local": "1980-05-12T20:56:36+08:00", "utc": "1980-05-12T12:56:36Z", "ms": 326984195653.83966 } }, "covered_min": 84, "window_min": 84, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 05:42 on Mon 12 May to 02:26 on Tue 13 May.", "fact": "1980-05-11T21:42:09Z → 1980-05-12T18:25:54Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:32–20:56 on the 11th, 19:32–20:57 on the 12th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 84 minutes on the 11th and 84 of 84 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 19759 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Monday 12 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": "1980-05-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-05-12", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Monday 12 May. Trayodaśī runs from 05:42 on Mon 12 May to 02:26 on Tue 13 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-05-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-05-12", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-05-12", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 4403, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-05-13T02:25:54+08:00", "utc": "1980-05-12T18:25:54Z", "ms": 327003954234.607 }, "end": { "local": "1980-05-13T23:08:38+08:00", "utc": "1980-05-13T15:08:38Z", "ms": 327078518324.8398 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-05-13T02:25:54+08:00", "utc": "1980-05-12T18:25:54Z", "ms": 327003954234.607 }, "end": { "local": "1980-05-13T23:08:38+08:00", "utc": "1980-05-13T15:08:38Z", "ms": 327078518324.8398 } }, "kaala": "nishita", "days": [ { "local_date": "1980-05-12", "window": { "start": { "local": "1980-05-13T00:24:31+08:00", "utc": "1980-05-12T16:24:31Z", "ms": 326996671365.8179 }, "end": { "local": "1980-05-13T01:12:31+08:00", "utc": "1980-05-12T17:12:31Z", "ms": 326999551365.8179 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-05-13", "window": { "start": { "local": "1980-05-14T00:24:31+08:00", "utc": "1980-05-13T16:24:31Z", "ms": 327083071088.25085 }, "end": { "local": "1980-05-14T01:12:31+08:00", "utc": "1980-05-13T17:12:31Z", "ms": 327085951088.25085 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 02:26 on Tue 13 May to 23:09 on Tue 13 May.", "fact": "1980-05-12T18:25:54Z → 1980-05-13T15:08:38Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:25–01:13 on the 12th, 00:25–01:13 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 0 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither night qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 4403 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Monday 12 May.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-05-12", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-05-12", "confidence": "boundary" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Monday 12 May. Caturdaśī runs from 02:26 on Tue 13 May to 23:09 on Tue 13 May, and reaches niśītha on neither day.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-05-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-05-17", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-05-17", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 237, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-05-17T13:08:54+08:00", "utc": "1980-05-17T05:08:54Z", "ms": 327388133818.4049 }, "end": { "local": "1980-05-18T12:12:43+08:00", "utc": "1980-05-18T04:12:43Z", "ms": 327471163086.04517 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": true, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-05-17T13:08:54+08:00", "utc": "1980-05-17T05:08:54Z", "ms": 327388133818.4049 }, "end": { "local": "1980-05-18T12:12:43+08:00", "utc": "1980-05-18T04:12:43Z", "ms": 327471163086.04517 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-05-17", "window": { "start": { "local": "1980-05-17T12:24:51+08:00", "utc": "1980-05-17T04:24:51Z", "ms": 327385491003.86096 }, "end": { "local": "1980-05-17T13:12:51+08:00", "utc": "1980-05-17T05:12:51Z", "ms": 327388371003.86096 } }, "covered_min": 4, "window_min": 48, "qualifies": true }, { "local_date": "1980-05-18", "window": { "start": { "local": "1980-05-18T12:24:53+08:00", "utc": "1980-05-18T04:24:53Z", "ms": 327471892913.80493 }, "end": { "local": "1980-05-18T13:12:53+08:00", "utc": "1980-05-18T05:12:53Z", "ms": 327474772913.80493 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 13:09 on Sat 17 May to 12:13 on Sun 18 May.", "fact": "1980-05-17T05:08:54Z → 1980-05-18T04:12:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 17th, 12:25–13:13 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 4 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 midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 237 s < 300 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Saturday 17 May.", "fact": "confidence: boundary (margin)" } ], "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": "1980-05-17", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-05-17", "confidence": "boundary" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Saturday 17 May. Caturthī runs from 13:09 on Sat 17 May to 12:13 on Sun 18 May and covers 4 of 48 minutes of madhyāhna that midday. It is 3 min 57 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-05-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-05-25", "festival": "ekadashi", "name": "Śukla Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-05-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22526, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-05-24T21:18:21+08:00", "utc": "1980-05-24T13:18:21Z", "ms": 328022301308.9366 }, "end": { "local": "1980-05-25T23:43:17+08:00", "utc": "1980-05-25T15:43:17Z", "ms": 328117396510.1284 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": true, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-05-24T21:18:21+08:00", "utc": "1980-05-24T13:18:21Z", "ms": 328022301308.9366 }, "end": { "local": "1980-05-25T23:43:17+08:00", "utc": "1980-05-25T15:43:17Z", "ms": 328117396510.1284 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-05-25", "window": { "start": { "local": "1980-05-25T05:59:03+08:00", "utc": "1980-05-24T21:59:03Z", "ms": 328053542526.32214 }, "end": { "local": "1980-05-25T05:59:03+08:00", "utc": "1980-05-24T21:59:03Z", "ms": 328053542526.32214 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-05-26", "window": { "start": { "local": "1980-05-26T05:58:42+08:00", "utc": "1980-05-25T21:58:42Z", "ms": 328139922050.9821 }, "end": { "local": "1980-05-26T05:58:42+08:00", "utc": "1980-05-25T21:58:42Z", "ms": 328139922050.9821 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:18 on Sat 24 May to 23:43 on Sun 25 May.", "fact": "1980-05-24T13:18:21Z → 1980-05-25T15:43:17Z" }, { "step": "kaala", "text": "Sunrise is at 05:59 on the 25th and 05:59 on the 26th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 25th and is not on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 22526 s" }, { "step": "ruling", "text": "Śukla Ekādaśī, Zunyi, 1980: Sunday 25 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": "1980-05-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-05-25", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Ekādaśī 1980 falls on Sunday 25 May. Ekādaśī runs from 21:18 on Sat 24 May to 23:43 on Sun 25 May and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-05-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-05-27", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-05-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17245, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-05-27T01:50:02+08:00", "utc": "1980-05-26T17:50:02Z", "ms": 328211401850.63513 }, "end": { "local": "1980-05-28T03:31:25+08:00", "utc": "1980-05-27T19:31:25Z", "ms": 328303884603.3432 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": true, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-05-27T01:50:02+08:00", "utc": "1980-05-26T17:50:02Z", "ms": 328211401850.63513 }, "end": { "local": "1980-05-28T03:31:25+08:00", "utc": "1980-05-27T19:31:25Z", "ms": 328303884603.3432 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-05-26", "window": { "start": { "local": "1980-05-26T19:40:11+08:00", "utc": "1980-05-26T11:40:11Z", "ms": 328189211281.1974 }, "end": { "local": "1980-05-26T21:02:37+08:00", "utc": "1980-05-26T13:02:37Z", "ms": 328194156828.1741 } }, "covered_min": 0, "window_min": 82, "qualifies": false }, { "local_date": "1980-05-27", "window": { "start": { "local": "1980-05-27T19:40:43+08:00", "utc": "1980-05-27T11:40:43Z", "ms": 328275643254.6492 }, "end": { "local": "1980-05-27T21:03:02+08:00", "utc": "1980-05-27T13:03:02Z", "ms": 328280582157.99805 } }, "covered_min": 82, "window_min": 82, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:50 on Tue 27 May to 03:31 on Wed 28 May.", "fact": "1980-05-26T17:50:02Z → 1980-05-27T19:31:25Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:40–21:03 on the 26th, 19:41–21:03 on the 27th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 82 minutes on the 26th and 82 of 82 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 17245 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Tuesday 27 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": "1980-05-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-05-27", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Tuesday 27 May. Trayodaśī runs from 01:50 on Tue 27 May to 03:31 on Wed 28 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-05-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-06-02", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19650, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-06-02T05:04:24+08:00", "utc": "1980-06-01T21:04:24Z", "ms": 328741463853.75037 }, "end": { "local": "1980-06-03T04:13:38+08:00", "utc": "1980-06-02T20:13:38Z", "ms": 328824817576.30597 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": true, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-02T05:04:24+08:00", "utc": "1980-06-01T21:04:24Z", "ms": 328741463853.75037 }, "end": { "local": "1980-06-03T04:13:38+08:00", "utc": "1980-06-02T20:13:38Z", "ms": 328824817576.30597 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-06-01", "window": { "start": { "local": "1980-06-01T21:54:06+08:00", "utc": "1980-06-01T13:54:06Z", "ms": 328715645647.40356 }, "end": { "local": "1980-06-01T21:54:06+08:00", "utc": "1980-06-01T13:54:06Z", "ms": 328715645647.40356 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-06-02", "window": { "start": { "local": "1980-06-02T22:46:07+08:00", "utc": "1980-06-02T14:46:07Z", "ms": 328805167174.6624 }, "end": { "local": "1980-06-02T22:46:07+08:00", "utc": "1980-06-02T14:46:07Z", "ms": 328805167174.6624 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:04 on Mon 2 Jun to 04:14 on Tue 3 Jun.", "fact": "1980-06-01T21:04:24Z → 1980-06-02T20:13:38Z" }, { "step": "kaala", "text": "Moonrise is at 21:54 on the 1st and 22:46 on the 2nd.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 1st and is on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 19650 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Monday 2 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": "1980-06-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-02", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Monday 2 June. Caturthī runs from 05:04 on Mon 2 Jun to 04:14 on Tue 3 Jun and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-06-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-06-09", "festival": "ekadashi", "name": "Kṛṣṇa Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30553, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-06-08T17:03:37+08:00", "utc": "1980-06-08T09:03:37Z", "ms": 329303016670.1853 }, "end": { "local": "1980-06-09T14:25:28+08:00", "utc": "1980-06-09T06:25:28Z", "ms": 329379927530.9351 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": true, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-08T17:03:37+08:00", "utc": "1980-06-08T09:03:37Z", "ms": 329303016670.1853 }, "end": { "local": "1980-06-09T14:25:28+08:00", "utc": "1980-06-09T06:25:28Z", "ms": 329379927530.9351 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-06-08", "window": { "start": { "local": "1980-06-08T05:56:16+08:00", "utc": "1980-06-07T21:56:16Z", "ms": 329262976160.81274 }, "end": { "local": "1980-06-08T05:56:16+08:00", "utc": "1980-06-07T21:56:16Z", "ms": 329262976160.81274 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-06-09", "window": { "start": { "local": "1980-06-09T05:56:14+08:00", "utc": "1980-06-08T21:56:14Z", "ms": 329349374183.7004 }, "end": { "local": "1980-06-09T05:56:14+08:00", "utc": "1980-06-08T21:56:14Z", "ms": 329349374183.7004 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 17:04 on Sun 8 Jun to 14:25 on Mon 9 Jun.", "fact": "1980-06-08T09:03:37Z → 1980-06-09T06:25:28Z" }, { "step": "kaala", "text": "Sunrise is at 05:56 on the 8th and 05:56 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 30553 s" }, { "step": "ruling", "text": "Kṛṣṇa Ekādaśī, Zunyi, 1980: Monday 9 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": "1980-06-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-09", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Ekādaśī 1980 falls on Monday 9 June. Ekādaśī runs from 17:04 on Sun 8 Jun to 14:25 on Mon 9 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-06-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-06-10", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28969, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-06-10T11:44:28+08:00", "utc": "1980-06-10T03:44:28Z", "ms": 329456667949.20905 }, "end": { "local": "1980-06-11T09:07:35+08:00", "utc": "1980-06-11T01:07:35Z", "ms": 329533654794.7379 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": true, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-10T11:44:28+08:00", "utc": "1980-06-10T03:44:28Z", "ms": 329456667949.20905 }, "end": { "local": "1980-06-11T09:07:35+08:00", "utc": "1980-06-11T01:07:35Z", "ms": 329533654794.7379 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-06-10", "window": { "start": { "local": "1980-06-10T19:47:17+08:00", "utc": "1980-06-10T11:47:17Z", "ms": 329485636701.9099 }, "end": { "local": "1980-06-10T21:08:28+08:00", "utc": "1980-06-10T13:08:28Z", "ms": 329490508351.3513 } }, "covered_min": 81, "window_min": 81, "qualifies": true }, { "local_date": "1980-06-11", "window": { "start": { "local": "1980-06-11T19:47:40+08:00", "utc": "1980-06-11T11:47:40Z", "ms": 329572059807.3923 }, "end": { "local": "1980-06-11T21:08:49+08:00", "utc": "1980-06-11T13:08:49Z", "ms": 329576928620.40063 } }, "covered_min": 0, "window_min": 81, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:44 on Tue 10 Jun to 09:08 on Wed 11 Jun.", "fact": "1980-06-10T03:44:28Z → 1980-06-11T01:07:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:47–21:08 on the 10th, 19:48–21:09 on the 11th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 81 of 81 minutes on the 10th and 0 of 81 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 28969 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Tuesday 10 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": "1980-06-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-10", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Tuesday 10 June. Trayodaśī runs from 11:44 on Tue 10 Jun to 09:08 on Wed 11 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-06-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-06-11", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19605, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-06-11T09:07:35+08:00", "utc": "1980-06-11T01:07:35Z", "ms": 329533654794.7379 }, "end": { "local": "1980-06-12T06:42:43+08:00", "utc": "1980-06-11T22:42:43Z", "ms": 329611363155.6585 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": true, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-11T09:07:35+08:00", "utc": "1980-06-11T01:07:35Z", "ms": 329533654794.7379 }, "end": { "local": "1980-06-12T06:42:43+08:00", "utc": "1980-06-11T22:42:43Z", "ms": 329611363155.6585 } }, "kaala": "nishita", "days": [ { "local_date": "1980-06-10", "window": { "start": { "local": "1980-06-11T00:27:45+08:00", "utc": "1980-06-10T16:27:45Z", "ms": 329502465387.3151 }, "end": { "local": "1980-06-11T01:15:45+08:00", "utc": "1980-06-10T17:15:45Z", "ms": 329505345387.3151 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-06-11", "window": { "start": { "local": "1980-06-12T00:27:58+08:00", "utc": "1980-06-11T16:27:58Z", "ms": 329588877856.1737 }, "end": { "local": "1980-06-12T01:15:58+08:00", "utc": "1980-06-11T17:15:58Z", "ms": 329591757856.1737 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 09:08 on Wed 11 Jun to 06:43 on Thu 12 Jun.", "fact": "1980-06-11T01:07:35Z → 1980-06-11T22:42:43Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:28–01:16 on the 10th, 00:28–01:16 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 19605 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Wednesday 11 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": "1980-06-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-11", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Wednesday 11 June. Caturdaśī runs from 09:08 on Wed 11 Jun to 06:43 on Thu 12 Jun and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-06-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/rambha-tritiya", "festival": "rambha-tritiya", "name": "Rambhā Tṛtīyā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37543, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-06-15T02:03:03+08:00", "utc": "1980-06-14T18:03:03Z", "ms": 329853782965.682 }, "end": { "local": "1980-06-16T01:45:08+08:00", "utc": "1980-06-15T17:45:08Z", "ms": 329939108311.50433 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-15T02:03:03+08:00", "utc": "1980-06-14T18:03:03Z", "ms": 329853782965.682 }, "end": { "local": "1980-06-16T01:45:08+08:00", "utc": "1980-06-15T17:45:08Z", "ms": 329939108311.50433 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-06-15", "window": { "start": { "local": "1980-06-15T12:28:46+08:00", "utc": "1980-06-15T04:28:46Z", "ms": 329891326118.2867 }, "end": { "local": "1980-06-15T13:16:46+08:00", "utc": "1980-06-15T05:16:46Z", "ms": 329894206118.2867 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-06-16", "window": { "start": { "local": "1980-06-16T12:28:59+08:00", "utc": "1980-06-16T04:28:59Z", "ms": 329977738728.5853 }, "end": { "local": "1980-06-16T13:16:59+08:00", "utc": "1980-06-16T05:16:59Z", "ms": 329980618728.5853 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 02:03 on Sun 15 Jun to 01:45 on Mon 16 Jun.", "fact": "1980-06-14T18:03:03Z → 1980-06-15T17:45:08Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:29–13:17 on the 15th, 12:29–13:17 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. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 37543 s" }, { "step": "ruling", "text": "Rambhā Tṛtīyā, Zunyi, 1980: Sunday 15 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rambha-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Rambha trtiya (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-06-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-15", "confidence": "determinate" } ], "quote": "In Zunyi, Rambhā Tṛtīyā 1980 falls on Sunday 15 June. Tṛtīyā runs from 02:03 on Sun 15 Jun to 01:45 on Mon 16 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-06-16", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37063, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-06-16T01:45:08+08:00", "utc": "1980-06-15T17:45:08Z", "ms": 329939108311.50433 }, "end": { "local": "1980-06-17T02:11:28+08:00", "utc": "1980-06-16T18:11:28Z", "ms": 330027088306.247 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-16T01:45:08+08:00", "utc": "1980-06-15T17:45:08Z", "ms": 329939108311.50433 }, "end": { "local": "1980-06-17T02:11:28+08:00", "utc": "1980-06-16T18:11:28Z", "ms": 330027088306.247 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-06-16", "window": { "start": { "local": "1980-06-16T12:28:59+08:00", "utc": "1980-06-16T04:28:59Z", "ms": 329977738728.5853 }, "end": { "local": "1980-06-16T13:16:59+08:00", "utc": "1980-06-16T05:16:59Z", "ms": 329980618728.5853 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-06-17", "window": { "start": { "local": "1980-06-17T12:29:11+08:00", "utc": "1980-06-17T04:29:11Z", "ms": 330064151411.94525 }, "end": { "local": "1980-06-17T13:17:11+08:00", "utc": "1980-06-17T05:17:11Z", "ms": 330067031411.94525 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 01:45 on Mon 16 Jun to 02:11 on Tue 17 Jun.", "fact": "1980-06-15T17:45:08Z → 1980-06-16T18:11:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:29–13:17 on the 16th, 12:29–13:17 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. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 37063 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Monday 16 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": "1980-06-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-16", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Monday 16 June. Caturthī runs from 01:45 on Mon 16 Jun to 02:11 on Tue 17 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-06-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/aranya-gauri-vrata", "festival": "aranya-gauri-vrata", "name": "Araṇya Gaurī Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26565, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-06-18T03:20:42+08:00", "utc": "1980-06-17T19:20:42Z", "ms": 330117641540.44025 }, "end": { "local": "1980-06-19T05:06:52+08:00", "utc": "1980-06-18T21:06:52Z", "ms": 330210411805.2238 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-18T03:20:42+08:00", "utc": "1980-06-17T19:20:42Z", "ms": 330117641540.44025 }, "end": { "local": "1980-06-19T05:06:52+08:00", "utc": "1980-06-18T21:06:52Z", "ms": 330210411805.2238 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-06-18", "window": { "start": { "local": "1980-06-18T12:29:24+08:00", "utc": "1980-06-18T04:29:24Z", "ms": 330150564142.8973 }, "end": { "local": "1980-06-18T13:17:24+08:00", "utc": "1980-06-18T05:17:24Z", "ms": 330153444142.8973 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-06-19", "window": { "start": { "local": "1980-06-19T12:29:37+08:00", "utc": "1980-06-19T04:29:37Z", "ms": 330236976896.6368 }, "end": { "local": "1980-06-19T13:17:37+08:00", "utc": "1980-06-19T05:17:37Z", "ms": 330239856896.6368 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 03:21 on Wed 18 Jun to 05:07 on Thu 19 Jun.", "fact": "1980-06-17T19:20:42Z → 1980-06-18T21:06:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:29–13:17 on the 18th, 12:30–13:18 on the 19th.", "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 18th and 0 of 48 on the 19th.", "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 26565 s" }, { "step": "ruling", "text": "Araṇya Gaurī Vrata, Zunyi, 1980: Wednesday 18 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "aranya-gauri-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Aranya sasthi, Aranya gauri vrata, (paraviddha), Skanda sasthi, (purvaviddha), Sitala sasthi yatra (Orissa)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-06-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-18", "confidence": "determinate" } ], "quote": "In Zunyi, Araṇya Gaurī Vrata 1980 falls on Wednesday 18 June. Ṣaṣṭhī runs from 03:21 on Wed 18 Jun to 05:07 on Thu 19 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/skanda-shashthi-jyaishtha", "festival": "skanda-shashthi-jyaishtha", "name": "Skanda Ṣaṣṭhī (Jyaiṣṭha)", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26565, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-06-18T03:20:42+08:00", "utc": "1980-06-17T19:20:42Z", "ms": 330117641540.44025 }, "end": { "local": "1980-06-19T05:06:52+08:00", "utc": "1980-06-18T21:06:52Z", "ms": 330210411805.2238 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-18T03:20:42+08:00", "utc": "1980-06-17T19:20:42Z", "ms": 330117641540.44025 }, "end": { "local": "1980-06-19T05:06:52+08:00", "utc": "1980-06-18T21:06:52Z", "ms": 330210411805.2238 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-06-18", "window": { "start": { "local": "1980-06-18T12:29:24+08:00", "utc": "1980-06-18T04:29:24Z", "ms": 330150564142.8973 }, "end": { "local": "1980-06-18T13:17:24+08:00", "utc": "1980-06-18T05:17:24Z", "ms": 330153444142.8973 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-06-19", "window": { "start": { "local": "1980-06-19T12:29:37+08:00", "utc": "1980-06-19T04:29:37Z", "ms": 330236976896.6368 }, "end": { "local": "1980-06-19T13:17:37+08:00", "utc": "1980-06-19T05:17:37Z", "ms": 330239856896.6368 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 03:21 on Wed 18 Jun to 05:07 on Thu 19 Jun.", "fact": "1980-06-17T19:20:42Z → 1980-06-18T21:06:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:29–13:17 on the 18th, 12:30–13:18 on the 19th.", "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 18th and 0 of 48 on the 19th.", "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 26565 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī (Jyaiṣṭha), Zunyi, 1980: Wednesday 18 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "skanda-shashthi-jyaishtha", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Aranya sasthi, Aranya gauri vrata, (paraviddha), Skanda sasthi, (purvaviddha), Sitala sasthi yatra (Orissa)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-06-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-18", "confidence": "determinate" } ], "quote": "In Zunyi, Skanda Ṣaṣṭhī (Jyaiṣṭha) 1980 falls on Wednesday 18 June. Ṣaṣṭhī runs from 03:21 on Wed 18 Jun to 05:07 on Thu 19 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-06-24", "festival": "ekadashi", "name": "Nirjalā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29935, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-06-23T14:16:48+08:00", "utc": "1980-06-23T06:16:48Z", "ms": 330589008020.67706 }, "end": { "local": "1980-06-24T15:58:10+08:00", "utc": "1980-06-24T07:58:10Z", "ms": 330681489840.1746 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-23T14:16:48+08:00", "utc": "1980-06-23T06:16:48Z", "ms": 330589008020.67706 }, "end": { "local": "1980-06-24T15:58:10+08:00", "utc": "1980-06-24T07:58:10Z", "ms": 330681489840.1746 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-06-23", "window": { "start": { "local": "1980-06-23T05:57:53+08:00", "utc": "1980-06-22T21:57:53Z", "ms": 330559072717.0961 }, "end": { "local": "1980-06-23T05:57:53+08:00", "utc": "1980-06-22T21:57:53Z", "ms": 330559072717.0961 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-06-24", "window": { "start": { "local": "1980-06-24T05:58:08+08:00", "utc": "1980-06-23T21:58:08Z", "ms": 330645487908.0406 }, "end": { "local": "1980-06-24T05:58:08+08:00", "utc": "1980-06-23T21:58:08Z", "ms": 330645487908.0406 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 14:17 on Mon 23 Jun to 15:58 on Tue 24 Jun.", "fact": "1980-06-23T06:16:48Z → 1980-06-24T07:58:10Z" }, { "step": "kaala", "text": "Sunrise is at 05:58 on the 23rd and 05:58 on the 24th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 23rd and is on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 29935 s" }, { "step": "ruling", "text": "Nirjalā Ekādaśī, Zunyi, 1980: Tuesday 24 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": "1980-06-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-24", "confidence": "determinate" } ], "quote": "In Zunyi, Nirjalā Ekādaśī 1980 falls on Tuesday 24 June. Ekādaśī runs from 14:17 on Mon 23 Jun to 15:58 on Tue 24 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-06-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shri-rama-dvadashi", "festival": "shri-rama-dvadashi", "name": "Śrī Rāma Dvādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9570, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-06-24T15:58:10+08:00", "utc": "1980-06-24T07:58:10Z", "ms": 330681489840.1746 }, "end": { "local": "1980-06-25T17:06:21+08:00", "utc": "1980-06-25T09:06:21Z", "ms": 330771981266.6475 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-24T15:58:10+08:00", "utc": "1980-06-24T07:58:10Z", "ms": 330681489840.1746 }, "end": { "local": "1980-06-25T17:06:21+08:00", "utc": "1980-06-25T09:06:21Z", "ms": 330771981266.6475 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-06-24", "window": { "start": { "local": "1980-06-24T12:30:40+08:00", "utc": "1980-06-24T04:30:40Z", "ms": 330669040179.61584 }, "end": { "local": "1980-06-24T13:18:40+08:00", "utc": "1980-06-24T05:18:40Z", "ms": 330671920179.61584 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-06-25", "window": { "start": { "local": "1980-06-25T12:30:53+08:00", "utc": "1980-06-25T04:30:53Z", "ms": 330755452581.5805 }, "end": { "local": "1980-06-25T13:18:53+08:00", "utc": "1980-06-25T05:18:53Z", "ms": 330758332581.5805 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 15:58 on Tue 24 Jun to 17:06 on Wed 25 Jun.", "fact": "1980-06-24T07:58:10Z → 1980-06-25T09:06:21Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:31–13:19 on the 24th, 12:31–13:19 on the 25th.", "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 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 9570 s" }, { "step": "ruling", "text": "Śrī Rāma Dvādaśī, Zunyi, 1980: Wednesday 25 June.", "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": "1980-06-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-25", "confidence": "determinate" } ], "quote": "In Zunyi, Śrī Rāma Dvādaśī 1980 falls on Wednesday 25 June. Dvādaśī runs from 15:58 on Tue 24 Jun to 17:06 on Wed 25 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-06-25", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7961, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-06-25T17:06:21+08:00", "utc": "1980-06-25T09:06:21Z", "ms": 330771981266.6475 }, "end": { "local": "1980-06-26T17:38:48+08:00", "utc": "1980-06-26T09:38:48Z", "ms": 330860327997.3 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-25T17:06:21+08:00", "utc": "1980-06-25T09:06:21Z", "ms": 330771981266.6475 }, "end": { "local": "1980-06-26T17:38:48+08:00", "utc": "1980-06-26T09:38:48Z", "ms": 330860327997.3 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-06-25", "window": { "start": { "local": "1980-06-25T19:51:21+08:00", "utc": "1980-06-25T11:51:21Z", "ms": 330781881100.6176 }, "end": { "local": "1980-06-25T21:12:20+08:00", "utc": "1980-06-25T13:12:20Z", "ms": 330786739774.701 } }, "covered_min": 81, "window_min": 81, "qualifies": true }, { "local_date": "1980-06-26", "window": { "start": { "local": "1980-06-26T19:51:29+08:00", "utc": "1980-06-26T11:51:29Z", "ms": 330868288542.0827 }, "end": { "local": "1980-06-26T21:12:29+08:00", "utc": "1980-06-26T13:12:29Z", "ms": 330873148625.099 } }, "covered_min": 0, "window_min": 81, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 17:06 on Wed 25 Jun to 17:39 on Thu 26 Jun.", "fact": "1980-06-25T09:06:21Z → 1980-06-26T09:38:48Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:51–21:12 on the 25th, 19:51–21:12 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 81 of 81 minutes on the 25th and 0 of 81 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 7961 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Wednesday 25 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": "1980-06-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-25", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Wednesday 25 June. Trayodaśī runs from 17:06 on Wed 25 Jun to 17:39 on Thu 26 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-06-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/vata-savitri-vrata", "festival": "vata-savitri-vrata", "name": "Vaṭa Sāvitrī Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-06-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8116, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-06-27T17:36:19+08:00", "utc": "1980-06-27T09:36:19Z", "ms": 330946579168.26556 }, "end": { "local": "1980-06-28T17:02:06+08:00", "utc": "1980-06-28T09:02:06Z", "ms": 331030926101.0561 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1980-06-27T17:36:19+08:00", "utc": "1980-06-27T09:36:19Z", "ms": 330946579168.26556 }, "end": { "local": "1980-06-28T17:02:06+08:00", "utc": "1980-06-28T09:02:06Z", "ms": 331030926101.0561 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-06-27", "window": { "start": { "local": "1980-06-27T19:51:35+08:00", "utc": "1980-06-27T11:51:35Z", "ms": 330954694760.5194 }, "end": { "local": "1980-06-27T21:12:37+08:00", "utc": "1980-06-27T13:12:37Z", "ms": 330959556534.2494 } }, "covered_min": 81, "window_min": 81, "qualifies": true }, { "local_date": "1980-06-28", "window": { "start": { "local": "1980-06-28T19:51:40+08:00", "utc": "1980-06-28T11:51:40Z", "ms": 331041099742.39417 }, "end": { "local": "1980-06-28T21:12:43+08:00", "utc": "1980-06-28T13:12:43Z", "ms": 331045963487.1707 } }, "covered_min": 0, "window_min": 81, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 17:36 on Fri 27 Jun to 17:02 on Sat 28 Jun.", "fact": "1980-06-27T09:36:19Z → 1980-06-28T09:02:06Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:52–21:13 on the 27th, 19:52–21:13 on the 28th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 81 of 81 minutes on the 27th and 0 of 81 on the 28th.", "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 8116 s" }, { "step": "ruling", "text": "Vaṭa Sāvitrī Vrata, Zunyi, 1980: Friday 27 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": "1980-06-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-06-27", "confidence": "determinate" } ], "quote": "In Zunyi, Vaṭa Sāvitrī Vrata 1980 falls on Friday 27 June. Pūrṇimā runs from 17:36 on Fri 27 Jun to 17:02 on Sat 28 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-07-01", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33845, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-07-01T12:56:02+08:00", "utc": "1980-07-01T04:56:02Z", "ms": 331275361739.30273 }, "end": { "local": "1980-07-02T11:01:58+08:00", "utc": "1980-07-02T03:01:58Z", "ms": 331354918161.8409 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-01T12:56:02+08:00", "utc": "1980-07-01T04:56:02Z", "ms": 331275361739.30273 }, "end": { "local": "1980-07-02T11:01:58+08:00", "utc": "1980-07-02T03:01:58Z", "ms": 331354918161.8409 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-07-01", "window": { "start": { "local": "1980-07-01T22:20:07+08:00", "utc": "1980-07-01T14:20:07Z", "ms": 331309206814.1324 }, "end": { "local": "1980-07-01T22:20:07+08:00", "utc": "1980-07-01T14:20:07Z", "ms": 331309206814.1324 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-07-02", "window": { "start": { "local": "1980-07-02T23:05:09+08:00", "utc": "1980-07-02T15:05:09Z", "ms": 331398308726.5801 }, "end": { "local": "1980-07-02T23:05:09+08:00", "utc": "1980-07-02T15:05:09Z", "ms": 331398308726.5801 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:56 on Tue 1 Jul to 11:02 on Wed 2 Jul.", "fact": "1980-07-01T04:56:02Z → 1980-07-02T03:01:58Z" }, { "step": "kaala", "text": "Moonrise is at 22:20 on the 1st and 23:05 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 33845 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Tuesday 1 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": "1980-07-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-01", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Tuesday 1 July. Caturthī runs from 12:56 on Tue 1 Jul to 11:02 on Wed 2 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-07-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-07-08", "festival": "ekadashi", "name": "Yoginī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29250, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-07-07T21:55:40+08:00", "utc": "1980-07-07T13:55:40Z", "ms": 331826140386.27515 }, "end": { "local": "1980-07-08T19:54:02+08:00", "utc": "1980-07-08T11:54:02Z", "ms": 331905242291.91974 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-07T21:55:40+08:00", "utc": "1980-07-07T13:55:40Z", "ms": 331826140386.27515 }, "end": { "local": "1980-07-08T19:54:02+08:00", "utc": "1980-07-08T11:54:02Z", "ms": 331905242291.91974 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-07-08", "window": { "start": { "local": "1980-07-08T06:03:11+08:00", "utc": "1980-07-07T22:03:11Z", "ms": 331855390511.8417 }, "end": { "local": "1980-07-08T06:03:11+08:00", "utc": "1980-07-07T22:03:11Z", "ms": 331855390511.8417 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-07-09", "window": { "start": { "local": "1980-07-09T06:03:37+08:00", "utc": "1980-07-08T22:03:37Z", "ms": 331941817498.72107 }, "end": { "local": "1980-07-09T06:03:37+08:00", "utc": "1980-07-08T22:03:37Z", "ms": 331941817498.72107 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:56 on Mon 7 Jul to 19:54 on Tue 8 Jul.", "fact": "1980-07-07T13:55:40Z → 1980-07-08T11:54:02Z" }, { "step": "kaala", "text": "Sunrise is at 06:03 on the 8th and 06:04 on the 9th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 8th and is not on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 29250 s" }, { "step": "ruling", "text": "Yoginī Ekādaśī, Zunyi, 1980: Tuesday 8 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": "1980-07-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-08", "confidence": "determinate" } ], "quote": "In Zunyi, Yoginī Ekādaśī 1980 falls on Tuesday 8 July. Ekādaśī runs from 21:56 on Mon 7 Jul to 19:54 on Tue 8 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-07-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-07-09", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6369, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-07-09T18:05:01+08:00", "utc": "1980-07-09T10:05:01Z", "ms": 331985101293.29565 }, "end": { "local": "1980-07-10T16:33:43+08:00", "utc": "1980-07-10T08:33:43Z", "ms": 332066022987.3302 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-09T18:05:01+08:00", "utc": "1980-07-09T10:05:01Z", "ms": 331985101293.29565 }, "end": { "local": "1980-07-10T16:33:43+08:00", "utc": "1980-07-10T08:33:43Z", "ms": 332066022987.3302 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-07-09", "window": { "start": { "local": "1980-07-09T19:51:10+08:00", "utc": "1980-07-09T11:51:10Z", "ms": 331991470012.8813 }, "end": { "local": "1980-07-09T21:12:53+08:00", "utc": "1980-07-09T13:12:53Z", "ms": 331996373349.8541 } }, "covered_min": 82, "window_min": 82, "qualifies": true }, { "local_date": "1980-07-10", "window": { "start": { "local": "1980-07-10T19:50:59+08:00", "utc": "1980-07-10T11:50:59Z", "ms": 332077859400.97626 }, "end": { "local": "1980-07-10T21:12:48+08:00", "utc": "1980-07-10T13:12:48Z", "ms": 332082767894.3529 } }, "covered_min": 0, "window_min": 82, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 18:05 on Wed 9 Jul to 16:34 on Thu 10 Jul.", "fact": "1980-07-09T10:05:01Z → 1980-07-10T08:33:43Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:51–21:13 on the 9th, 19:51–21:13 on the 10th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 82 of 82 minutes on the 9th and 0 of 82 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 6369 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Wednesday 9 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": "1980-07-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-09", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Wednesday 9 July. Trayodaśī runs from 18:05 on Wed 9 Jul to 16:34 on Thu 10 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-07-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-07-10", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28803, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-07-10T16:33:43+08:00", "utc": "1980-07-10T08:33:43Z", "ms": 332066022987.3302 }, "end": { "local": "1980-07-11T15:25:31+08:00", "utc": "1980-07-11T07:25:31Z", "ms": 332148330953.7462 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-10T16:33:43+08:00", "utc": "1980-07-10T08:33:43Z", "ms": 332066022987.3302 }, "end": { "local": "1980-07-11T15:25:31+08:00", "utc": "1980-07-11T07:25:31Z", "ms": 332148330953.7462 } }, "kaala": "nishita", "days": [ { "local_date": "1980-07-10", "window": { "start": { "local": "1980-07-11T00:33:46+08:00", "utc": "1980-07-10T16:33:46Z", "ms": 332094826251.1386 }, "end": { "local": "1980-07-11T01:21:46+08:00", "utc": "1980-07-10T17:21:46Z", "ms": 332097706251.1386 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-07-11", "window": { "start": { "local": "1980-07-12T00:33:55+08:00", "utc": "1980-07-11T16:33:55Z", "ms": 332181234541.8699 }, "end": { "local": "1980-07-12T01:21:55+08:00", "utc": "1980-07-11T17:21:55Z", "ms": 332184114541.8699 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 16:34 on Thu 10 Jul to 15:26 on Fri 11 Jul.", "fact": "1980-07-10T08:33:43Z → 1980-07-11T07:25:31Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:34–01:22 on the 10th, 00:34–01:22 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 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. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 28803 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Thursday 10 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": "1980-07-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-10", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Thursday 10 July. Caturdaśī runs from 16:34 on Thu 10 Jul to 15:26 on Fri 11 Jul and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-07-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/rathayatra", "festival": "rathayatra", "name": "Rathayātrā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4599, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1980-07-13T14:38:35+08:00", "utc": "1980-07-13T06:38:35Z", "ms": 332318314504.0119 }, "end": { "local": "1980-07-14T15:07:09+08:00", "utc": "1980-07-14T07:07:09Z", "ms": 332406429352.6004 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-13T14:38:35+08:00", "utc": "1980-07-13T06:38:35Z", "ms": 332318314504.0119 }, "end": { "local": "1980-07-14T15:07:09+08:00", "utc": "1980-07-14T07:07:09Z", "ms": 332406429352.6004 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-07-13", "window": { "start": { "local": "1980-07-13T12:33:55+08:00", "utc": "1980-07-13T04:33:55Z", "ms": 332310835034.5285 }, "end": { "local": "1980-07-13T13:21:55+08:00", "utc": "1980-07-13T05:21:55Z", "ms": 332313715034.5285 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-07-14", "window": { "start": { "local": "1980-07-14T12:34:02+08:00", "utc": "1980-07-14T04:34:02Z", "ms": 332397241712.6886 }, "end": { "local": "1980-07-14T13:22:02+08:00", "utc": "1980-07-14T05:22:02Z", "ms": 332400121712.6886 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 14:39 on Sun 13 Jul to 15:07 on Mon 14 Jul.", "fact": "1980-07-13T06:38:35Z → 1980-07-14T07:07:09Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:34–13:22 on the 13th, 12:34–13:22 on the 14th.", "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 13th and 48 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 4599 s" }, { "step": "ruling", "text": "Rathayātrā, Zunyi, 1980: Monday 14 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": "1980-07-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-14", "confidence": "determinate" } ], "quote": "In Zunyi, Rathayātrā 1980 falls on Monday 14 July. Dvitīyā runs from 14:39 on Sun 13 Jul to 15:07 on Mon 14 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-07-16", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10182, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-07-15T16:11:50+08:00", "utc": "1980-07-15T08:11:50Z", "ms": 332496710074.8929 }, "end": { "local": "1980-07-16T17:49:48+08:00", "utc": "1980-07-16T09:49:48Z", "ms": 332588988482.15216 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-15T16:11:50+08:00", "utc": "1980-07-15T08:11:50Z", "ms": 332496710074.8929 }, "end": { "local": "1980-07-16T17:49:48+08:00", "utc": "1980-07-16T09:49:48Z", "ms": 332588988482.15216 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-07-15", "window": { "start": { "local": "1980-07-15T12:34:08+08:00", "utc": "1980-07-15T04:34:08Z", "ms": 332483647897.1028 }, "end": { "local": "1980-07-15T13:22:08+08:00", "utc": "1980-07-15T05:22:08Z", "ms": 332486527897.1028 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-07-16", "window": { "start": { "local": "1980-07-16T12:34:14+08:00", "utc": "1980-07-16T04:34:14Z", "ms": 332570053571.47614 }, "end": { "local": "1980-07-16T13:22:14+08:00", "utc": "1980-07-16T05:22:14Z", "ms": 332572933571.47614 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 16:12 on Tue 15 Jul to 17:50 on Wed 16 Jul.", "fact": "1980-07-15T08:11:50Z → 1980-07-16T09:49:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:34–13:22 on the 15th, 12:34–13:22 on the 16th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 15th and 48 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 10182 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Wednesday 16 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": "1980-07-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-16", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Wednesday 16 July. Caturthī runs from 16:12 on Tue 15 Jul to 17:50 on Wed 16 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-07-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/skanda-panchami", "festival": "skanda-panchami", "name": "Skanda Pañcamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16055, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-07-16T17:49:48+08:00", "utc": "1980-07-16T09:49:48Z", "ms": 332588988482.15216 }, "end": { "local": "1980-07-17T19:54:32+08:00", "utc": "1980-07-17T11:54:32Z", "ms": 332682872305.6657 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-16T17:49:48+08:00", "utc": "1980-07-16T09:49:48Z", "ms": 332588988482.15216 }, "end": { "local": "1980-07-17T19:54:32+08:00", "utc": "1980-07-17T11:54:32Z", "ms": 332682872305.6657 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-07-16", "window": { "start": { "local": "1980-07-16T12:34:14+08:00", "utc": "1980-07-16T04:34:14Z", "ms": 332570053571.47614 }, "end": { "local": "1980-07-16T13:22:14+08:00", "utc": "1980-07-16T05:22:14Z", "ms": 332572933571.47614 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-07-17", "window": { "start": { "local": "1980-07-17T12:34:19+08:00", "utc": "1980-07-17T04:34:19Z", "ms": 332656458720.9391 }, "end": { "local": "1980-07-17T13:22:19+08:00", "utc": "1980-07-17T05:22:19Z", "ms": 332659338720.9391 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 17:50 on Wed 16 Jul to 19:55 on Thu 17 Jul.", "fact": "1980-07-16T09:49:48Z → 1980-07-17T11:54:32Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:34–13:22 on the 16th, 12:34–13:22 on the 17th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 16th and 48 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 16055 s" }, { "step": "ruling", "text": "Skanda Pañcamī, Zunyi, 1980: Thursday 17 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": "1980-07-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-17", "confidence": "determinate" } ], "quote": "In Zunyi, Skanda Pañcamī 1980 falls on Thursday 17 July. Pañcamī runs from 17:50 on Wed 16 Jul to 19:55 on Thu 17 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vivasvat-saptami", "festival": "vivasvat-saptami", "name": "Vivasvat Saptamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32009, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1980-07-18T22:15:52+08:00", "utc": "1980-07-18T14:15:52Z", "ms": 332777752133.54535 }, "end": { "local": "1980-07-20T00:40:57+08:00", "utc": "1980-07-19T16:40:57Z", "ms": 332872857151.4224 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-18T22:15:52+08:00", "utc": "1980-07-18T14:15:52Z", "ms": 332777752133.54535 }, "end": { "local": "1980-07-20T00:40:57+08:00", "utc": "1980-07-19T16:40:57Z", "ms": 332872857151.4224 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-07-18", "window": { "start": { "local": "1980-07-18T12:34:23+08:00", "utc": "1980-07-18T04:34:23Z", "ms": 332742863332.0282 }, "end": { "local": "1980-07-18T13:22:23+08:00", "utc": "1980-07-18T05:22:23Z", "ms": 332745743332.0282 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-07-19", "window": { "start": { "local": "1980-07-19T12:34:27+08:00", "utc": "1980-07-19T04:34:27Z", "ms": 332829267392.64636 }, "end": { "local": "1980-07-19T13:22:27+08:00", "utc": "1980-07-19T05:22:27Z", "ms": 332832147392.64636 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 22:16 on Fri 18 Jul to 00:41 on Sun 20 Jul.", "fact": "1980-07-18T14:15:52Z → 1980-07-19T16:40:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:34–13:22 on the 18th, 12:34–13:22 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. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 32009 s" }, { "step": "ruling", "text": "Vivasvat Saptamī, Zunyi, 1980: Saturday 19 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": "1980-07-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-19", "confidence": "determinate" } ], "quote": "In Zunyi, Vivasvat Saptamī 1980 falls on Saturday 19 July. Saptamī runs from 22:16 on Fri 18 Jul to 00:41 on Sun 20 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-07-24", "festival": "ekadashi", "name": "Hariśayanī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-24", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 225, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-07-23T06:06:53+08:00", "utc": "1980-07-22T22:06:53Z", "ms": 333151613394.8727 }, "end": { "local": "1980-07-24T06:46:30+08:00", "utc": "1980-07-23T22:46:30Z", "ms": 333240390352.01434 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-23T06:06:53+08:00", "utc": "1980-07-22T22:06:53Z", "ms": 333151613394.8727 }, "end": { "local": "1980-07-24T06:46:30+08:00", "utc": "1980-07-23T22:46:30Z", "ms": 333240390352.01434 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-07-23", "window": { "start": { "local": "1980-07-23T06:10:38+08:00", "utc": "1980-07-22T22:10:38Z", "ms": 333151838365.12354 }, "end": { "local": "1980-07-23T06:10:38+08:00", "utc": "1980-07-22T22:10:38Z", "ms": 333151838365.12354 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-07-24", "window": { "start": { "local": "1980-07-24T06:11:10+08:00", "utc": "1980-07-23T22:11:10Z", "ms": 333238270293.61066 }, "end": { "local": "1980-07-24T06:11:10+08:00", "utc": "1980-07-23T22:11:10Z", "ms": 333238270293.61066 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 06:07 on Wed 23 Jul to 06:47 on Thu 24 Jul.", "fact": "1980-07-22T22:06:53Z → 1980-07-23T22:46:30Z" }, { "step": "kaala", "text": "Sunrise is at 06:11 on the 23rd and 06:11 on the 24th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 23rd and is on the 24th.", "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 225 s < 300 s" }, { "step": "ruling", "text": "Hariśayanī Ekādaśī, Zunyi, 1980: Thursday 24 July.", "fact": "confidence: boundary (margin)" } ], "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": "1980-07-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-24", "confidence": "boundary" } ], "quote": "In Zunyi, Hariśayanī Ekādaśī 1980 falls on Thursday 24 July. Ekādaśī runs from 06:07 on Wed 23 Jul to 06:47 on Thu 24 Jul and is current at sunrise that day. It is 3 min 45 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-07-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-07-25", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31977, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-07-25T06:44:30+08:00", "utc": "1980-07-24T22:44:30Z", "ms": 333326670362.7639 }, "end": { "local": "1980-07-26T06:02:07+08:00", "utc": "1980-07-25T22:02:07Z", "ms": 333410527438.0029 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-25T06:44:30+08:00", "utc": "1980-07-24T22:44:30Z", "ms": 333326670362.7639 }, "end": { "local": "1980-07-26T06:02:07+08:00", "utc": "1980-07-25T22:02:07Z", "ms": 333410527438.0029 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-07-24", "window": { "start": { "local": "1980-07-24T19:46:08+08:00", "utc": "1980-07-24T11:46:08Z", "ms": 333287167923.3183 }, "end": { "local": "1980-07-24T21:09:33+08:00", "utc": "1980-07-24T13:09:33Z", "ms": 333292172511.5206 } }, "covered_min": 0, "window_min": 83, "qualifies": false }, { "local_date": "1980-07-25", "window": { "start": { "local": "1980-07-25T19:45:37+08:00", "utc": "1980-07-25T11:45:37Z", "ms": 333373537039.6003 }, "end": { "local": "1980-07-25T21:09:10+08:00", "utc": "1980-07-25T13:09:10Z", "ms": 333378550030.1714 } }, "covered_min": 84, "window_min": 84, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 06:45 on Fri 25 Jul to 06:02 on Sat 26 Jul.", "fact": "1980-07-24T22:44:30Z → 1980-07-25T22:02:07Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:46–21:10 on the 24th, 19:46–21:09 on the 25th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 83 minutes on the 24th and 84 of 84 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 31977 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Friday 25 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": "1980-07-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-25", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Friday 25 July. Trayodaśī runs from 06:45 on Fri 25 Jul to 06:02 on Sat 26 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-07-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/vyasa-puja", "festival": "vyasa-puja", "name": "Vyāsa Pūjā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5371, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 } }, "kaala": "udaya-3", "days": [ { "local_date": "1980-07-27", "window": { "start": { "local": "1980-07-27T06:12:47+08:00", "utc": "1980-07-26T22:12:47Z", "ms": 333497566677.4966 }, "end": { "local": "1980-07-27T08:55:08+08:00", "utc": "1980-07-27T00:55:08Z", "ms": 333507307627.60675 } }, "covered_min": 162, "window_min": 162, "qualifies": true }, { "local_date": "1980-07-28", "window": { "start": { "local": "1980-07-28T06:13:19+08:00", "utc": "1980-07-27T22:13:19Z", "ms": 333583998944.1107 }, "end": { "local": "1980-07-28T08:55:27+08:00", "utc": "1980-07-28T00:55:27Z", "ms": 333593726502.20966 } }, "covered_min": 0, "window_min": 162, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul.", "fact": "1980-07-26T20:43:16Z → 1980-07-27T18:53:38Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:13–08:55 on the 27th, 06:13–08:55 on the 28th.", "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 162 of 162 minutes on the 27th and 0 of 162 on the 28th.", "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 5371 s" }, { "step": "ruling", "text": "Vyāsa Pūjā, Zunyi, 1980: Sunday 27 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": "1980-07-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-27", "confidence": "determinate" } ], "quote": "In Zunyi, Vyāsa Pūjā 1980 falls on Sunday 27 July. Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/guru-purnima", "festival": "guru-purnima", "name": "Guru Pūrṇimā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28283, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-07-27", "window": { "start": { "local": "1980-07-27T12:34:39+08:00", "utc": "1980-07-27T04:34:39Z", "ms": 333520479052.7721 }, "end": { "local": "1980-07-27T13:22:39+08:00", "utc": "1980-07-27T05:22:39Z", "ms": 333523359052.7721 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-07-28", "window": { "start": { "local": "1980-07-28T12:34:38+08:00", "utc": "1980-07-28T04:34:38Z", "ms": 333606877839.35815 }, "end": { "local": "1980-07-28T13:22:38+08:00", "utc": "1980-07-28T05:22:38Z", "ms": 333609757839.35815 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul.", "fact": "1980-07-26T20:43:16Z → 1980-07-27T18:53:38Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:35–13:23 on the 27th, 12:35–13:23 on the 28th.", "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 27th and 0 of 48 on the 28th.", "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 28283 s" }, { "step": "ruling", "text": "Guru Pūrṇimā, Zunyi, 1980: Sunday 27 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": "1980-07-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-27", "confidence": "determinate" } ], "quote": "In Zunyi, Guru Pūrṇimā 1980 falls on Sunday 27 July. Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/kokila-vrata", "festival": "kokila-vrata", "name": "Kokilā Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25746, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 } }, "kaala": "sayahna", "days": [ { "local_date": "1980-07-26", "window": { "start": { "local": "1980-07-26T17:02:31+08:00", "utc": "1980-07-26T09:02:31Z", "ms": 333450150788.9516 }, "end": { "local": "1980-07-26T19:45:05+08:00", "utc": "1980-07-26T11:45:05Z", "ms": 333459904868.9686 } }, "covered_min": 0, "window_min": 163, "qualifies": false }, { "local_date": "1980-07-27", "window": { "start": { "local": "1980-07-27T17:02:10+08:00", "utc": "1980-07-27T09:02:10Z", "ms": 333536530477.9374 }, "end": { "local": "1980-07-27T19:44:31+08:00", "utc": "1980-07-27T11:44:31Z", "ms": 333546271428.04755 } }, "covered_min": 162, "window_min": 162, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul.", "fact": "1980-07-26T20:43:16Z → 1980-07-27T18:53:38Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 17:03–19:45 on the 26th, 17:02–19:45 on the 27th.", "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 163 minutes on the 26th and 162 of 162 on the 27th.", "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 25746 s" }, { "step": "ruling", "text": "Kokilā Vrata, Zunyi, 1980: Sunday 27 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": "1980-07-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-27", "confidence": "determinate" } ], "quote": "In Zunyi, Kokilā Vrata 1980 falls on Sunday 27 July. Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/shiva-shayanotsava", "festival": "shiva-shayanotsava", "name": "Śiva Śayanotsava", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20716, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1980-07-27T04:43:16+08:00", "utc": "1980-07-26T20:43:16Z", "ms": 333492196160.95435 }, "end": { "local": "1980-07-28T02:53:38+08:00", "utc": "1980-07-27T18:53:38Z", "ms": 333572017667.9672 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-07-26", "window": { "start": { "local": "1980-07-26T19:45:05+08:00", "utc": "1980-07-26T11:45:05Z", "ms": 333459904868.9686 }, "end": { "local": "1980-07-26T21:08:46+08:00", "utc": "1980-07-26T13:08:46Z", "ms": 333464926443.439 } }, "covered_min": 0, "window_min": 84, "qualifies": false }, { "local_date": "1980-07-27", "window": { "start": { "local": "1980-07-27T19:44:31+08:00", "utc": "1980-07-27T11:44:31Z", "ms": 333546271428.04755 }, "end": { "local": "1980-07-27T21:08:22+08:00", "utc": "1980-07-27T13:08:22Z", "ms": 333551301763.52264 } }, "covered_min": 84, "window_min": 84, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul.", "fact": "1980-07-26T20:43:16Z → 1980-07-27T18:53:38Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:45–21:09 on the 26th, 19:45–21:08 on the 27th.", "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 84 minutes on the 26th and 84 of 84 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 20716 s" }, { "step": "ruling", "text": "Śiva Śayanotsava, Zunyi, 1980: Sunday 27 July.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shiva-shayanotsava", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Guru purnima (paraviddha), Vyasa puja (paraviddha, 3 muhurtas after sunrise), Kokila vrata (sayahna vyapini). Siva sayanotsava (pradosavyapini)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-07-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-27", "confidence": "determinate" } ], "quote": "In Zunyi, Śiva Śayanotsava 1980 falls on Sunday 27 July. Pūrṇimā runs from 04:43 on Sun 27 Jul to 02:54 on Mon 28 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ashunya-shayana-vrata-ashadha", "festival": "ashunya-shayana-vrata-ashadha", "name": "Aśūnya Śayana Vrata (Āṣāḍha)", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4088, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1980-07-29T00:39:52+08:00", "utc": "1980-07-28T16:39:52Z", "ms": 333650392221.3109 }, "end": { "local": "1980-07-29T22:09:02+08:00", "utc": "1980-07-29T14:09:02Z", "ms": 333727742250.43243 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-07-29T00:39:52+08:00", "utc": "1980-07-28T16:39:52Z", "ms": 333650392221.3109 }, "end": { "local": "1980-07-29T22:09:02+08:00", "utc": "1980-07-29T14:09:02Z", "ms": 333727742250.43243 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-07-28", "window": { "start": { "local": "1980-07-28T20:13:17+08:00", "utc": "1980-07-28T12:13:17Z", "ms": 333634397358.8602 }, "end": { "local": "1980-07-28T20:13:17+08:00", "utc": "1980-07-28T12:13:17Z", "ms": 333634397358.8602 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-07-29", "window": { "start": { "local": "1980-07-29T21:00:54+08:00", "utc": "1980-07-29T13:00:54Z", "ms": 333723654441.7722 }, "end": { "local": "1980-07-29T21:00:54+08:00", "utc": "1980-07-29T13:00:54Z", "ms": 333723654441.7722 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 00:40 on Tue 29 Jul to 22:09 on Tue 29 Jul.", "fact": "1980-07-28T16:39:52Z → 1980-07-29T14:09:02Z" }, { "step": "kaala", "text": "Moonrise is at 20:13 on the 28th and 21:01 on the 29th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā 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. 102" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 4088 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata (Āṣāḍha), Zunyi, 1980: Tuesday 29 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": "1980-07-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-29", "confidence": "determinate" } ], "quote": "In Zunyi, Aśūnya Śayana Vrata (Āṣāḍha) 1980 falls on Tuesday 29 July. Dvitīyā runs from 00:40 on Tue 29 Jul to 22:09 on Tue 29 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-07-30", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-07-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8252, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-07-30T19:28:06+08:00", "utc": "1980-07-30T11:28:06Z", "ms": 333804485648.90326 }, "end": { "local": "1980-07-31T16:43:37+08:00", "utc": "1980-07-31T08:43:37Z", "ms": 333881017403.5505 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-07-30T19:28:06+08:00", "utc": "1980-07-30T11:28:06Z", "ms": 333804485648.90326 }, "end": { "local": "1980-07-31T16:43:37+08:00", "utc": "1980-07-31T08:43:37Z", "ms": 333881017403.5505 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-07-30", "window": { "start": { "local": "1980-07-30T21:45:38+08:00", "utc": "1980-07-30T13:45:38Z", "ms": 333812738094.8621 }, "end": { "local": "1980-07-30T21:45:38+08:00", "utc": "1980-07-30T13:45:38Z", "ms": 333812738094.8621 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-07-31", "window": { "start": { "local": "1980-07-31T22:28:14+08:00", "utc": "1980-07-31T14:28:14Z", "ms": 333901694208.96204 }, "end": { "local": "1980-07-31T22:28:14+08:00", "utc": "1980-07-31T14:28:14Z", "ms": 333901694208.96204 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 19:28 on Wed 30 Jul to 16:44 on Thu 31 Jul.", "fact": "1980-07-30T11:28:06Z → 1980-07-31T08:43:37Z" }, { "step": "kaala", "text": "Moonrise is at 21:46 on the 30th and 22:28 on the 31st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī 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. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8252 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Wednesday 30 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": "1980-07-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-07-30", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Wednesday 30 July. Caturthī runs from 19:28 on Wed 30 Jul to 16:44 on Thu 31 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-07-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-08-06", "festival": "ekadashi", "name": "Kāmikā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9019, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-08-06T03:47:50+08:00", "utc": "1980-08-05T19:47:50Z", "ms": 334352870383.53937 }, "end": { "local": "1980-08-07T02:46:33+08:00", "utc": "1980-08-06T18:46:33Z", "ms": 334435592905.7457 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-06T03:47:50+08:00", "utc": "1980-08-05T19:47:50Z", "ms": 334352870383.53937 }, "end": { "local": "1980-08-07T02:46:33+08:00", "utc": "1980-08-06T18:46:33Z", "ms": 334435592905.7457 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-08-06", "window": { "start": { "local": "1980-08-06T06:18:10+08:00", "utc": "1980-08-05T22:18:10Z", "ms": 334361889727.80804 }, "end": { "local": "1980-08-06T06:18:10+08:00", "utc": "1980-08-05T22:18:10Z", "ms": 334361889727.80804 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-08-07", "window": { "start": { "local": "1980-08-07T06:18:42+08:00", "utc": "1980-08-06T22:18:42Z", "ms": 334448321835.93976 }, "end": { "local": "1980-08-07T06:18:42+08:00", "utc": "1980-08-06T22:18:42Z", "ms": 334448321835.93976 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:48 on Wed 6 Aug to 02:47 on Thu 7 Aug.", "fact": "1980-08-05T19:47:50Z → 1980-08-06T18:46:33Z" }, { "step": "kaala", "text": "Sunrise is at 06:18 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 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: paraviddha → only-day · margin 9019 s" }, { "step": "ruling", "text": "Kāmikā Ekādaśī, Zunyi, 1980: Wednesday 6 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": "1980-08-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-06", "confidence": "determinate" } ], "quote": "In Zunyi, Kāmikā Ekādaśī 1980 falls on Wednesday 6 August. Ekādaśī runs from 03:48 on Wed 6 Aug to 02:47 on Thu 7 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-08-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-08-08", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17992, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-08-08T02:10:46+08:00", "utc": "1980-08-07T18:10:46Z", "ms": 334519845539.07904 }, "end": { "local": "1980-08-09T02:01:57+08:00", "utc": "1980-08-08T18:01:57Z", "ms": 334605717327.303 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-08T02:10:46+08:00", "utc": "1980-08-07T18:10:46Z", "ms": 334519845539.07904 }, "end": { "local": "1980-08-09T02:01:57+08:00", "utc": "1980-08-08T18:01:57Z", "ms": 334605717327.303 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-08-07", "window": { "start": { "local": "1980-08-07T19:37:05+08:00", "utc": "1980-08-07T11:37:05Z", "ms": 334496225101.15576 }, "end": { "local": "1980-08-07T21:02:42+08:00", "utc": "1980-08-07T13:02:42Z", "ms": 334501362267.827 } }, "covered_min": 0, "window_min": 86, "qualifies": false }, { "local_date": "1980-08-08", "window": { "start": { "local": "1980-08-08T19:36:18+08:00", "utc": "1980-08-08T11:36:18Z", "ms": 334582577876.5428 }, "end": { "local": "1980-08-08T21:02:06+08:00", "utc": "1980-08-08T13:02:06Z", "ms": 334587725594.2255 } }, "covered_min": 86, "window_min": 86, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:11 on Fri 8 Aug to 02:02 on Sat 9 Aug.", "fact": "1980-08-07T18:10:46Z → 1980-08-08T18:01:57Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:37–21:03 on the 7th, 19:36–21:02 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 86 minutes on the 7th and 86 of 86 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 17992 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Friday 8 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": "1980-08-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-08", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Friday 8 August. Trayodaśī runs from 02:11 on Fri 8 Aug to 02:02 on Sat 9 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-08-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-08-09", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2396, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-08-09T02:01:57+08:00", "utc": "1980-08-08T18:01:57Z", "ms": 334605717327.303 }, "end": { "local": "1980-08-10T02:21:17+08:00", "utc": "1980-08-09T18:21:17Z", "ms": 334693276709.1062 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-09T02:01:57+08:00", "utc": "1980-08-08T18:01:57Z", "ms": 334605717327.303 }, "end": { "local": "1980-08-10T02:21:17+08:00", "utc": "1980-08-09T18:21:17Z", "ms": 334693276709.1062 } }, "kaala": "nishita", "days": [ { "local_date": "1980-08-08", "window": { "start": { "local": "1980-08-09T00:34:02+08:00", "utc": "1980-08-08T16:34:02Z", "ms": 334600441817.853 }, "end": { "local": "1980-08-09T01:22:02+08:00", "utc": "1980-08-08T17:22:02Z", "ms": 334603321817.853 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-08-09", "window": { "start": { "local": "1980-08-10T00:33:54+08:00", "utc": "1980-08-09T16:33:54Z", "ms": 334686833583.2097 }, "end": { "local": "1980-08-10T01:21:54+08:00", "utc": "1980-08-09T17:21:54Z", "ms": 334689713583.2097 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 02:02 on Sat 9 Aug to 02:21 on Sun 10 Aug.", "fact": "1980-08-08T18:01:57Z → 1980-08-09T18:21:17Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:34–01:22 on the 8th, 00:34–01:22 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 48 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 2396 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Saturday 9 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": "1980-08-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-09", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Saturday 9 August. Caturdaśī runs from 02:02 on Sat 9 Aug to 02:21 on Sun 10 Aug and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-08-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/madhusrava-tritiya", "festival": "madhusrava-tritiya", "name": "Madhusravā Tṛtīyā", "everyday": "Hariyali Teej", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15563, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-08-13T06:08:18+08:00", "utc": "1980-08-12T22:08:18Z", "ms": 334966098281.51117 }, "end": { "local": "1980-08-14T08:13:25+08:00", "utc": "1980-08-14T00:13:25Z", "ms": 335060005381.3124 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-13T06:08:18+08:00", "utc": "1980-08-12T22:08:18Z", "ms": 334966098281.51117 }, "end": { "local": "1980-08-14T08:13:25+08:00", "utc": "1980-08-14T00:13:25Z", "ms": 335060005381.3124 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-13", "window": { "start": { "local": "1980-08-13T12:32:59+08:00", "utc": "1980-08-13T04:32:59Z", "ms": 334989179345.52466 }, "end": { "local": "1980-08-13T13:20:59+08:00", "utc": "1980-08-13T05:20:59Z", "ms": 334992059345.52466 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-08-14", "window": { "start": { "local": "1980-08-14T12:32:48+08:00", "utc": "1980-08-14T04:32:48Z", "ms": 335075568366.5714 }, "end": { "local": "1980-08-14T13:20:48+08:00", "utc": "1980-08-14T05:20:48Z", "ms": 335078448366.5714 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 06:08 on Wed 13 Aug to 08:13 on Thu 14 Aug.", "fact": "1980-08-12T22:08:18Z → 1980-08-14T00:13:25Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:33–13:21 on the 13th, 12:33–13:21 on the 14th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 13th and 0 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 15563 s" }, { "step": "ruling", "text": "Madhusravā Tṛtīyā, Zunyi, 1980: Wednesday 13 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": "1980-08-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-13", "confidence": "determinate" } ], "quote": "In Zunyi, Madhusravā Tṛtīyā (Hariyali Teej) 1980 falls on Wednesday 13 August. Tṛtīyā runs from 06:08 on Wed 13 Aug to 08:13 on Thu 14 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-08-14", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7087, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-08-14T08:13:25+08:00", "utc": "1980-08-14T00:13:25Z", "ms": 335060005381.3124 }, "end": { "local": "1980-08-15T10:34:30+08:00", "utc": "1980-08-15T02:34:30Z", "ms": 335154869620.4494 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-14T08:13:25+08:00", "utc": "1980-08-14T00:13:25Z", "ms": 335060005381.3124 }, "end": { "local": "1980-08-15T10:34:30+08:00", "utc": "1980-08-15T02:34:30Z", "ms": 335154869620.4494 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-14", "window": { "start": { "local": "1980-08-14T12:32:48+08:00", "utc": "1980-08-14T04:32:48Z", "ms": 335075568366.5714 }, "end": { "local": "1980-08-14T13:20:48+08:00", "utc": "1980-08-14T05:20:48Z", "ms": 335078448366.5714 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-08-15", "window": { "start": { "local": "1980-08-15T12:32:37+08:00", "utc": "1980-08-15T04:32:37Z", "ms": 335161956841.4756 }, "end": { "local": "1980-08-15T13:20:37+08:00", "utc": "1980-08-15T05:20:37Z", "ms": 335164836841.4756 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 08:13 on Thu 14 Aug to 10:34 on Fri 15 Aug.", "fact": "1980-08-14T00:13:25Z → 1980-08-15T02:34:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:33–13:21 on the 14th, 12:33–13:21 on the 15th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 14th and 0 of 48 on the 15th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 7087 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Thursday 14 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": "1980-08-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-14", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Thursday 14 August. Caturthī runs from 08:13 on Thu 14 Aug to 10:34 on Fri 15 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-08-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/naga-panchami", "festival": "naga-panchami", "name": "Nāga Pañcamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1076, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-08-15T10:34:30+08:00", "utc": "1980-08-15T02:34:30Z", "ms": 335154869620.4494 }, "end": { "local": "1980-08-16T13:02:29+08:00", "utc": "1980-08-16T05:02:29Z", "ms": 335250149106.0879 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-15T10:34:30+08:00", "utc": "1980-08-15T02:34:30Z", "ms": 335154869620.4494 }, "end": { "local": "1980-08-16T13:02:29+08:00", "utc": "1980-08-16T05:02:29Z", "ms": 335250149106.0879 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-15", "window": { "start": { "local": "1980-08-15T12:32:37+08:00", "utc": "1980-08-15T04:32:37Z", "ms": 335161956841.4756 }, "end": { "local": "1980-08-15T13:20:37+08:00", "utc": "1980-08-15T05:20:37Z", "ms": 335164836841.4756 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-08-16", "window": { "start": { "local": "1980-08-16T12:32:25+08:00", "utc": "1980-08-16T04:32:25Z", "ms": 335248344777.5357 }, "end": { "local": "1980-08-16T13:20:25+08:00", "utc": "1980-08-16T05:20:25Z", "ms": 335251224777.5357 } }, "covered_min": 30, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 10:34 on Fri 15 Aug to 13:02 on Sat 16 Aug.", "fact": "1980-08-15T02:34:30Z → 1980-08-16T05:02:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:33–13:21 on the 15th, 12:32–13:20 on the 16th.", "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 15th and 30 of 48 on the 16th.", "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 1076 s" }, { "step": "ruling", "text": "Nāga Pañcamī, Zunyi, 1980: Saturday 16 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": "1980-08-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-16", "confidence": "determinate" } ], "quote": "In Zunyi, Nāga Pañcamī 1980 falls on Saturday 16 August. Pañcamī runs from 10:34 on Fri 15 Aug to 13:02 on Sat 16 Aug and covers 30 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/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-08-22", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35465, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-08-21T20:35:22+08:00", "utc": "1980-08-21T12:35:22Z", "ms": 335709321594.0537 }, "end": { "local": "1980-08-22T20:08:33+08:00", "utc": "1980-08-22T12:08:33Z", "ms": 335794113222.34845 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-21T20:35:22+08:00", "utc": "1980-08-21T12:35:22Z", "ms": 335709321594.0537 }, "end": { "local": "1980-08-22T20:08:33+08:00", "utc": "1980-08-22T12:08:33Z", "ms": 335794113222.34845 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-08-22", "window": { "start": { "local": "1980-08-22T06:26:26+08:00", "utc": "1980-08-21T22:26:26Z", "ms": 335744786111.21796 }, "end": { "local": "1980-08-22T06:26:26+08:00", "utc": "1980-08-21T22:26:26Z", "ms": 335744786111.21796 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-08-23", "window": { "start": { "local": "1980-08-23T06:26:56+08:00", "utc": "1980-08-22T22:26:56Z", "ms": 335831215609.292 }, "end": { "local": "1980-08-23T06:26:56+08:00", "utc": "1980-08-22T22:26:56Z", "ms": 335831215609.292 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 20:35 on Thu 21 Aug to 20:09 on Fri 22 Aug.", "fact": "1980-08-21T12:35:22Z → 1980-08-22T12:08:33Z" }, { "step": "kaala", "text": "Sunrise is at 06:26 on the 22nd and 06:27 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 not 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 35465 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Zunyi, 1980: Friday 22 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": "1980-08-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-22", "confidence": "determinate" } ], "quote": "In Zunyi, Putradā Ekādaśī 1980 falls on Friday 22 August. Ekādaśī runs from 20:35 on Thu 21 Aug to 20:09 on Fri 22 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-08-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/damodara-dvadashi", "festival": "damodara-dvadashi", "name": "Dāmodara Dvādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20282, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-08-22T20:08:33+08:00", "utc": "1980-08-22T12:08:33Z", "ms": 335794113222.34845 }, "end": { "local": "1980-08-23T18:56:48+08:00", "utc": "1980-08-23T10:56:48Z", "ms": 335876208146.3848 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-22T20:08:33+08:00", "utc": "1980-08-22T12:08:33Z", "ms": 335794113222.34845 }, "end": { "local": "1980-08-23T18:56:48+08:00", "utc": "1980-08-23T10:56:48Z", "ms": 335876208146.3848 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-22", "window": { "start": { "local": "1980-08-22T12:31:02+08:00", "utc": "1980-08-22T04:31:02Z", "ms": 335766661612.474 }, "end": { "local": "1980-08-22T13:19:02+08:00", "utc": "1980-08-22T05:19:02Z", "ms": 335769541612.474 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-08-23", "window": { "start": { "local": "1980-08-23T12:30:46+08:00", "utc": "1980-08-23T04:30:46Z", "ms": 335853046065.3314 }, "end": { "local": "1980-08-23T13:18:46+08:00", "utc": "1980-08-23T05:18:46Z", "ms": 335855926065.3314 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 20:09 on Fri 22 Aug to 18:57 on Sat 23 Aug.", "fact": "1980-08-22T12:08:33Z → 1980-08-23T10:56:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:31–13:19 on the 22nd, 12:31–13:19 on the 23rd.", "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 22nd and 48 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 20282 s" }, { "step": "ruling", "text": "Dāmodara Dvādaśī, Zunyi, 1980: Saturday 23 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": "1980-08-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-23", "confidence": "determinate" } ], "quote": "In Zunyi, Dāmodara Dvādaśī 1980 falls on Saturday 23 August. Dvādaśī runs from 20:09 on Fri 22 Aug to 18:57 on Sat 23 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-08-23", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1548, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-08-23T18:56:48+08:00", "utc": "1980-08-23T10:56:48Z", "ms": 335876208146.3848 }, "end": { "local": "1980-08-24T17:04:06+08:00", "utc": "1980-08-24T09:04:06Z", "ms": 335955845500.08484 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-23T18:56:48+08:00", "utc": "1980-08-23T10:56:48Z", "ms": 335876208146.3848 }, "end": { "local": "1980-08-24T17:04:06+08:00", "utc": "1980-08-24T09:04:06Z", "ms": 335955845500.08484 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-08-23", "window": { "start": { "local": "1980-08-23T19:22:37+08:00", "utc": "1980-08-23T11:22:37Z", "ms": 335877756521.3708 }, "end": { "local": "1980-08-23T20:51:15+08:00", "utc": "1980-08-23T12:51:15Z", "ms": 335883074974.78485 } }, "covered_min": 89, "window_min": 89, "qualifies": true }, { "local_date": "1980-08-24", "window": { "start": { "local": "1980-08-24T19:21:35+08:00", "utc": "1980-08-24T11:21:35Z", "ms": 335964095227.6862 }, "end": { "local": "1980-08-24T20:50:26+08:00", "utc": "1980-08-24T12:50:26Z", "ms": 335969425738.06726 } }, "covered_min": 0, "window_min": 89, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 18:57 on Sat 23 Aug to 17:04 on Sun 24 Aug.", "fact": "1980-08-23T10:56:48Z → 1980-08-24T09:04:06Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:23–20:51 on the 23rd, 19:22–20:50 on the 24th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 89 of 89 minutes on the 23rd and 0 of 89 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1548 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Saturday 23 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": "1980-08-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-23", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Saturday 23 August. Trayodaśī runs from 18:57 on Sat 23 Aug to 17:04 on Sun 24 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-08-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/raksha-bandhana", "festival": "raksha-bandhana", "name": "Rakṣā Bandhana", "everyday": "Rakhi", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-25", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 18829, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-08-25T14:36:39+08:00", "utc": "1980-08-25T06:36:39Z", "ms": 336033398680.9876 }, "end": { "local": "1980-08-26T11:42:12+08:00", "utc": "1980-08-26T03:42:12Z", "ms": 336109332177.553 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "second-half", "start": { "local": "1980-08-26T01:12:16+08:00", "utc": "1980-08-25T17:12:16Z", "ms": 336071536356.6171 }, "end": { "local": "1980-08-26T11:42:12+08:00", "utc": "1980-08-26T03:42:12Z", "ms": 336109332177.553 } }, "kaala": "day", "days": [ { "local_date": "1980-08-25", "window": { "start": { "local": "1980-08-25T06:27:54+08:00", "utc": "1980-08-24T22:27:54Z", "ms": 336004074055.54395 }, "end": { "local": "1980-08-26T06:28:23+08:00", "utc": "1980-08-25T22:28:23Z", "ms": 336090503018.1398 } }, "covered_min": 316, "window_min": 1440, "qualifies": true }, { "local_date": "1980-08-26", "window": { "start": { "local": "1980-08-26T06:28:23+08:00", "utc": "1980-08-25T22:28:23Z", "ms": 336090503018.1398 }, "end": { "local": "1980-08-27T06:28:52+08:00", "utc": "1980-08-26T22:28:52Z", "ms": 336176931819.6075 } }, "covered_min": 314, "window_min": 1440, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:37 on Mon 25 Aug to 11:42 on Tue 26 Aug. Its second half begins at 01:12 on Tue 26 Aug.", "fact": "1980-08-25T06:36:39Z → 1980-08-26T03:42:12Z · second half from 1980-08-25T17:12:16Z" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 06:28 on the 25th, and from 06:28 on the 26th.", "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 316 of 1440 minutes on the 25th and 314 of 1440 on the 26th.", "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 18829 s" }, { "step": "ruling", "text": "Rakṣā Bandhana, Zunyi, 1980: Monday 25 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": "1980-08-25", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-25", "confidence": "boundary" } ], "quote": "In Zunyi, Rakṣā Bandhana (Rakhi) 1980 falls on Monday 25 August. The second half of Pūrṇimā runs from 01:12 on Tue 26 Aug to 11:42 on Tue 26 Aug and falls on two days: 316 minutes of it on the 25th, 314 on the 26th; 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/zunyi/festivals/1980/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": "/zunyi/festivals/1980/rishi-tarpana", "festival": "rishi-tarpana", "name": "Ṛṣi Tarpaṇa", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2865, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-08-25T14:36:39+08:00", "utc": "1980-08-25T06:36:39Z", "ms": 336033398680.9876 }, "end": { "local": "1980-08-26T11:42:12+08:00", "utc": "1980-08-26T03:42:12Z", "ms": 336109332177.553 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1980-08-25T14:36:39+08:00", "utc": "1980-08-25T06:36:39Z", "ms": 336033398680.9876 }, "end": { "local": "1980-08-26T11:42:12+08:00", "utc": "1980-08-26T03:42:12Z", "ms": 336109332177.553 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-25", "window": { "start": { "local": "1980-08-25T12:30:14+08:00", "utc": "1980-08-25T04:30:14Z", "ms": 336025813658.24744 }, "end": { "local": "1980-08-25T13:18:14+08:00", "utc": "1980-08-25T05:18:14Z", "ms": 336028693658.24744 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-08-26", "window": { "start": { "local": "1980-08-26T12:29:57+08:00", "utc": "1980-08-26T04:29:57Z", "ms": 336112196834.09686 }, "end": { "local": "1980-08-26T13:17:57+08:00", "utc": "1980-08-26T05:17:57Z", "ms": 336115076834.09686 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:37 on Mon 25 Aug to 11:42 on Tue 26 Aug.", "fact": "1980-08-25T06:36:39Z → 1980-08-26T03:42:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:30–13:18 on the 25th, 12:30–13:18 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 0 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": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: unstated → second-day · margin 2865 s" }, { "step": "ruling", "text": "Ṛṣi Tarpaṇa, Zunyi, 1980: Tuesday 26 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": "1980-08-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-26", "confidence": "determinate" } ], "quote": "In Zunyi, Ṛṣi Tarpaṇa 1980 falls on Tuesday 26 August. Pūrṇimā runs from 14:37 on Mon 25 Aug to 11:42 on Tue 26 Aug, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ashunya-shayana-vrata", "festival": "ashunya-shayana-vrata", "name": "Aśūnya Śayana Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31514, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1980-08-27T08:29:25+08:00", "utc": "1980-08-27T00:29:25Z", "ms": 336184164900.56476 }, "end": { "local": "1980-08-28T05:07:21+08:00", "utc": "1980-08-27T21:07:21Z", "ms": 336258440868.8656 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-08-27T08:29:25+08:00", "utc": "1980-08-27T00:29:25Z", "ms": 336184164900.56476 }, "end": { "local": "1980-08-28T05:07:21+08:00", "utc": "1980-08-27T21:07:21Z", "ms": 336258440868.8656 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-08-26", "window": { "start": { "local": "1980-08-26T19:37:23+08:00", "utc": "1980-08-26T11:37:23Z", "ms": 336137842749.5057 }, "end": { "local": "1980-08-26T19:37:23+08:00", "utc": "1980-08-26T11:37:23Z", "ms": 336137842749.5057 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-08-27", "window": { "start": { "local": "1980-08-27T20:22:07+08:00", "utc": "1980-08-27T12:22:07Z", "ms": 336226927184.8876 }, "end": { "local": "1980-08-27T20:22:07+08:00", "utc": "1980-08-27T12:22:07Z", "ms": 336226927184.8876 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 08:29 on Wed 27 Aug to 05:07 on Thu 28 Aug.", "fact": "1980-08-27T00:29:25Z → 1980-08-27T21:07:21Z" }, { "step": "kaala", "text": "Moonrise is at 19:37 on the 26th and 20:22 on the 27th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā must be current at moonrise. It is not on the 26th and is on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 31514 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata, Zunyi, 1980: Wednesday 27 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": "1980-08-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-27", "confidence": "determinate" } ], "quote": "In Zunyi, Aśūnya Śayana Vrata 1980 falls on Wednesday 27 August. Dvitīyā runs from 08:29 on Wed 27 Aug to 05:07 on Thu 28 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/kajjali-tritiya", "festival": "kajjali-tritiya", "name": "Kajjalī Tṛtīyā", "everyday": "Kajari Teej", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26521, "anga": { "type": "tithi", "index": 17, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-08-28T05:07:21+08:00", "utc": "1980-08-27T21:07:21Z", "ms": 336258440868.8656 }, "end": { "local": "1980-08-29T01:45:05+08:00", "utc": "1980-08-28T17:45:05Z", "ms": 336332705432.5961 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-08-28T05:07:21+08:00", "utc": "1980-08-27T21:07:21Z", "ms": 336258440868.8656 }, "end": { "local": "1980-08-29T01:45:05+08:00", "utc": "1980-08-28T17:45:05Z", "ms": 336332705432.5961 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-28", "window": { "start": { "local": "1980-08-28T12:29:22+08:00", "utc": "1980-08-28T04:29:22Z", "ms": 336284962041.9237 }, "end": { "local": "1980-08-28T13:17:22+08:00", "utc": "1980-08-28T05:17:22Z", "ms": 336287842041.9237 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-08-29", "window": { "start": { "local": "1980-08-29T12:29:04+08:00", "utc": "1980-08-29T04:29:04Z", "ms": 336371344114.45984 }, "end": { "local": "1980-08-29T13:17:04+08:00", "utc": "1980-08-29T05:17:04Z", "ms": 336374224114.45984 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 05:07 on Thu 28 Aug to 01:45 on Fri 29 Aug.", "fact": "1980-08-27T21:07:21Z → 1980-08-28T17:45:05Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:29–13:17 on the 28th, 12:29–13:17 on the 29th.", "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 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: paraviddha → only-day · margin 26521 s" }, { "step": "ruling", "text": "Kajjalī Tṛtīyā, Zunyi, 1980: Thursday 28 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "kajjali-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 3 Kajjali trtiya, (paraviddha), Angaveta trtiya (Orissa)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-08-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-28", "confidence": "determinate" } ], "quote": "In Zunyi, Kajjalī Tṛtīyā (Kajari Teej) 1980 falls on Thursday 28 August. Tṛtīyā runs from 05:07 on Thu 28 Aug to 01:45 on Fri 29 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/bahula-chaturthi", "festival": "bahula-chaturthi", "name": "Bahulā Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11705, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-08-29T01:45:05+08:00", "utc": "1980-08-28T17:45:05Z", "ms": 336332705432.5961 }, "end": { "local": "1980-08-29T22:31:24+08:00", "utc": "1980-08-29T14:31:24Z", "ms": 336407484288.9575 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-08-29T01:45:05+08:00", "utc": "1980-08-28T17:45:05Z", "ms": 336332705432.5961 }, "end": { "local": "1980-08-29T22:31:24+08:00", "utc": "1980-08-29T14:31:24Z", "ms": 336407484288.9575 } }, "kaala": "sayahna", "days": [ { "local_date": "1980-08-28", "window": { "start": { "local": "1980-08-28T16:43:47+08:00", "utc": "1980-08-28T08:43:47Z", "ms": 336300226984.449 }, "end": { "local": "1980-08-28T19:17:24+08:00", "utc": "1980-08-28T11:17:24Z", "ms": 336309443612.79913 } }, "covered_min": 0, "window_min": 154, "qualifies": false }, { "local_date": "1980-08-29", "window": { "start": { "local": "1980-08-29T16:43:01+08:00", "utc": "1980-08-29T08:43:01Z", "ms": 336386581192.6468 }, "end": { "local": "1980-08-29T19:16:19+08:00", "utc": "1980-08-29T11:16:19Z", "ms": 336395779244.7715 } }, "covered_min": 153, "window_min": 153, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 01:45 on Fri 29 Aug to 22:31 on Fri 29 Aug.", "fact": "1980-08-28T17:45:05Z → 1980-08-29T14:31:24Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:44–19:17 on the 28th, 16:43–19:16 on the 29th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during sāyāhna. It covers 0 of 154 minutes on the 28th and 153 of 153 on the 29th.", "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 11705 s" }, { "step": "ruling", "text": "Bahulā Caturthī, Zunyi, 1980: Friday 29 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bahula-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 4 Bahula caturthi (Madhyadesa) (Sayahnavyapini: if occurs on two successive days, it is to be observed on the 1st day)." } ], "kaala": "sayahna", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-08-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-29", "confidence": "determinate" } ], "quote": "In Zunyi, Bahulā Caturthī 1980 falls on Friday 29 August. Caturthī runs from 01:45 on Fri 29 Aug to 22:31 on Fri 29 Aug and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-08-29", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2589, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-08-29T01:45:05+08:00", "utc": "1980-08-28T17:45:05Z", "ms": 336332705432.5961 }, "end": { "local": "1980-08-29T22:31:24+08:00", "utc": "1980-08-29T14:31:24Z", "ms": 336407484288.9575 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-08-29T01:45:05+08:00", "utc": "1980-08-28T17:45:05Z", "ms": 336332705432.5961 }, "end": { "local": "1980-08-29T22:31:24+08:00", "utc": "1980-08-29T14:31:24Z", "ms": 336407484288.9575 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-08-28", "window": { "start": { "local": "1980-08-28T21:05:25+08:00", "utc": "1980-08-28T13:05:25Z", "ms": 336315924938.2725 }, "end": { "local": "1980-08-28T21:05:25+08:00", "utc": "1980-08-28T13:05:25Z", "ms": 336315924938.2725 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-08-29", "window": { "start": { "local": "1980-08-29T21:48:15+08:00", "utc": "1980-08-29T13:48:15Z", "ms": 336404895468.21106 }, "end": { "local": "1980-08-29T21:48:15+08:00", "utc": "1980-08-29T13:48:15Z", "ms": 336404895468.21106 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 01:45 on Fri 29 Aug to 22:31 on Fri 29 Aug.", "fact": "1980-08-28T17:45:05Z → 1980-08-29T14:31:24Z" }, { "step": "kaala", "text": "Moonrise is at 21:05 on the 28th and 21:48 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 2589 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Friday 29 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-08-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-29", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Friday 29 August. Caturthī runs from 01:45 on Fri 29 Aug to 22:31 on Fri 29 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-08-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/hala-shashthi", "festival": "hala-shashthi", "name": "Hala Ṣaṣṭhī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-08-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13478, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-08-30T19:34:23+08:00", "utc": "1980-08-30T11:34:23Z", "ms": 336483262860.43823 }, "end": { "local": "1980-08-31T17:01:05+08:00", "utc": "1980-08-31T09:01:05Z", "ms": 336560464812.03156 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-08-30T19:34:23+08:00", "utc": "1980-08-30T11:34:23Z", "ms": 336483262860.43823 }, "end": { "local": "1980-08-31T17:01:05+08:00", "utc": "1980-08-31T09:01:05Z", "ms": 336560464812.03156 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-30", "window": { "start": { "local": "1980-08-30T12:28:46+08:00", "utc": "1980-08-30T04:28:46Z", "ms": 336457725859.5559 }, "end": { "local": "1980-08-30T13:16:46+08:00", "utc": "1980-08-30T05:16:46Z", "ms": 336460605859.5559 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-08-31", "window": { "start": { "local": "1980-08-31T12:28:27+08:00", "utc": "1980-08-31T04:28:27Z", "ms": 336544107296.49963 }, "end": { "local": "1980-08-31T13:16:27+08:00", "utc": "1980-08-31T05:16:27Z", "ms": 336546987296.49963 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 19:34 on Sat 30 Aug to 17:01 on Sun 31 Aug.", "fact": "1980-08-30T11:34:23Z → 1980-08-31T09:01:05Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:29–13:17 on the 30th, 12:28–13:16 on the 31st.", "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 30th and 48 of 48 on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 13478 s" }, { "step": "ruling", "text": "Hala Ṣaṣṭhī, Zunyi, 1980: Sunday 31 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "hala-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 6 Hala sasthi (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-08-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-08-31", "confidence": "determinate" } ], "quote": "In Zunyi, Hala Ṣaṣṭhī 1980 falls on Sunday 31 August. Ṣaṣṭhī runs from 19:34 on Sat 30 Aug to 17:01 on Sun 31 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/janmashtami", "festival": "janmashtami", "name": "Janmāṣṭamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34272, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-09-01T14:57:10+08:00", "utc": "1980-09-01T06:57:10Z", "ms": 336639430354.6088 }, "end": { "local": "1980-09-02T13:26:37+08:00", "utc": "1980-09-02T05:26:37Z", "ms": 336720397156.5269 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-01T14:57:10+08:00", "utc": "1980-09-01T06:57:10Z", "ms": 336639430354.6088 }, "end": { "local": "1980-09-02T13:26:37+08:00", "utc": "1980-09-02T05:26:37Z", "ms": 336720397156.5269 } }, "kaala": "nishita", "days": [ { "local_date": "1980-09-01", "window": { "start": { "local": "1980-09-02T00:28:22+08:00", "utc": "1980-09-01T16:28:22Z", "ms": 336673702477.0639 }, "end": { "local": "1980-09-02T01:16:22+08:00", "utc": "1980-09-01T17:16:22Z", "ms": 336676582477.0639 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-02", "window": { "start": { "local": "1980-09-03T00:28:03+08:00", "utc": "1980-09-02T16:28:03Z", "ms": 336760083307.2081 }, "end": { "local": "1980-09-03T01:16:03+08:00", "utc": "1980-09-02T17:16:03Z", "ms": 336762963307.2081 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 14:57 on Mon 1 Sep to 13:27 on Tue 2 Sep.", "fact": "1980-09-01T06:57:10Z → 1980-09-02T05:26:37Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:28–01:16 on the 1st, 00:28–01:16 on the 2nd.", "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 1st and 0 of 48 on the 2nd.", "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 34272 s" }, { "step": "ruling", "text": "Janmāṣṭamī, Zunyi, 1980: Monday 1 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": "1980-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-01", "confidence": "determinate" } ], "quote": "In Zunyi, Janmāṣṭamī 1980 falls on Monday 1 September. Aṣṭamī runs from 14:57 on Mon 1 Sep to 13:27 on Tue 2 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/shitala-saptami", "festival": "shitala-saptami", "name": "Śītalā Saptamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6062, "anga": { "type": "tithi", "index": 21, "key": "saptami", "name": "Saptamī", "start": { "local": "1980-08-31T17:01:05+08:00", "utc": "1980-08-31T09:01:05Z", "ms": 336560464812.03156 }, "end": { "local": "1980-09-01T14:57:10+08:00", "utc": "1980-09-01T06:57:10Z", "ms": 336639430354.6088 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-08-31T17:01:05+08:00", "utc": "1980-08-31T09:01:05Z", "ms": 336560464812.03156 }, "end": { "local": "1980-09-01T14:57:10+08:00", "utc": "1980-09-01T06:57:10Z", "ms": 336639430354.6088 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-08-31", "window": { "start": { "local": "1980-08-31T12:28:27+08:00", "utc": "1980-08-31T04:28:27Z", "ms": 336544107296.49963 }, "end": { "local": "1980-08-31T13:16:27+08:00", "utc": "1980-08-31T05:16:27Z", "ms": 336546987296.49963 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-09-01", "window": { "start": { "local": "1980-09-01T12:28:08+08:00", "utc": "1980-09-01T04:28:08Z", "ms": 336630488443.7418 }, "end": { "local": "1980-09-01T13:16:08+08:00", "utc": "1980-09-01T05:16:08Z", "ms": 336633368443.7418 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 17:01 on Sun 31 Aug to 14:57 on Mon 1 Sep.", "fact": "1980-08-31T09:01:05Z → 1980-09-01T06:57:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:28–13:16 on the 31st, 12:28–13:16 on the 1st.", "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 31st and 48 of 48 on the 1st.", "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 6062 s" }, { "step": "ruling", "text": "Śītalā Saptamī, Zunyi, 1980: Monday 1 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": "1980-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-01", "confidence": "determinate" } ], "quote": "In Zunyi, Śītalā Saptamī 1980 falls on Monday 1 September. Saptamī runs from 17:01 on Sun 31 Aug to 14:57 on Mon 1 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-09-05", "festival": "ekadashi", "name": "Ajā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20355, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-09-04T12:11:53+08:00", "utc": "1980-09-04T04:11:53Z", "ms": 336888712721.61456 }, "end": { "local": "1980-09-05T12:26:18+08:00", "utc": "1980-09-05T04:26:18Z", "ms": 336975978219.9596 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-04T12:11:53+08:00", "utc": "1980-09-04T04:11:53Z", "ms": 336888712721.61456 }, "end": { "local": "1980-09-05T12:26:18+08:00", "utc": "1980-09-05T04:26:18Z", "ms": 336975978219.9596 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-09-04", "window": { "start": { "local": "1980-09-04T06:32:38+08:00", "utc": "1980-09-03T22:32:38Z", "ms": 336868357741.5291 }, "end": { "local": "1980-09-04T06:32:38+08:00", "utc": "1980-09-03T22:32:38Z", "ms": 336868357741.5291 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-09-05", "window": { "start": { "local": "1980-09-05T06:33:06+08:00", "utc": "1980-09-04T22:33:06Z", "ms": 336954785558.866 }, "end": { "local": "1980-09-05T06:33:06+08:00", "utc": "1980-09-04T22:33:06Z", "ms": 336954785558.866 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 12:12 on Thu 4 Sep to 12:26 on Fri 5 Sep.", "fact": "1980-09-04T04:11:53Z → 1980-09-05T04:26:18Z" }, { "step": "kaala", "text": "Sunrise is at 06:33 on the 4th and 06:33 on the 5th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 4th and is on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 20355 s" }, { "step": "ruling", "text": "Ajā Ekādaśī, Zunyi, 1980: Friday 5 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": "1980-09-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-05", "confidence": "determinate" } ], "quote": "In Zunyi, Ajā Ekādaśī 1980 falls on Friday 5 September. Ekādaśī runs from 12:12 on Thu 4 Sep to 12:26 on Fri 5 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-09-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-09-06", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16856, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-09-06T13:11:59+08:00", "utc": "1980-09-06T05:11:59Z", "ms": 337065118558.9413 }, "end": { "local": "1980-09-07T14:25:24+08:00", "utc": "1980-09-07T06:25:24Z", "ms": 337155923733.89075 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-06T13:11:59+08:00", "utc": "1980-09-06T05:11:59Z", "ms": 337065118558.9413 }, "end": { "local": "1980-09-07T14:25:24+08:00", "utc": "1980-09-07T06:25:24Z", "ms": 337155923733.89075 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-09-06", "window": { "start": { "local": "1980-09-06T19:07:28+08:00", "utc": "1980-09-06T11:07:28Z", "ms": 337086447526.5283 }, "end": { "local": "1980-09-06T20:39:00+08:00", "utc": "1980-09-06T12:39:00Z", "ms": 337091939988.42145 } }, "covered_min": 92, "window_min": 92, "qualifies": true }, { "local_date": "1980-09-07", "window": { "start": { "local": "1980-09-07T19:06:19+08:00", "utc": "1980-09-07T11:06:19Z", "ms": 337172779342.7516 }, "end": { "local": "1980-09-07T20:38:05+08:00", "utc": "1980-09-07T12:38:05Z", "ms": 337178284579.5306 } }, "covered_min": 0, "window_min": 92, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:12 on Sat 6 Sep to 14:25 on Sun 7 Sep.", "fact": "1980-09-06T05:11:59Z → 1980-09-07T06:25:24Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:07–20:39 on the 6th, 19:06–20:38 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 92 of 92 minutes on the 6th and 0 of 92 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 16856 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Saturday 6 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": "1980-09-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-06", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Saturday 6 September. Trayodaśī runs from 13:12 on Sat 6 Sep to 14:25 on Sun 7 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-09-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/aghora-chaturdashi", "festival": "aghora-chaturdashi", "name": "Aghora Caturdaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10945, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-09-07T14:25:24+08:00", "utc": "1980-09-07T06:25:24Z", "ms": 337155923733.89075 }, "end": { "local": "1980-09-08T16:02:46+08:00", "utc": "1980-09-08T08:02:46Z", "ms": 337248165803.0106 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-07T14:25:24+08:00", "utc": "1980-09-07T06:25:24Z", "ms": 337155923733.89075 }, "end": { "local": "1980-09-08T16:02:46+08:00", "utc": "1980-09-08T08:02:46Z", "ms": 337248165803.0106 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-09-07", "window": { "start": { "local": "1980-09-07T19:06:19+08:00", "utc": "1980-09-07T11:06:19Z", "ms": 337172779342.7516 }, "end": { "local": "1980-09-07T20:38:05+08:00", "utc": "1980-09-07T12:38:05Z", "ms": 337178284579.5306 } }, "covered_min": 92, "window_min": 92, "qualifies": true }, { "local_date": "1980-09-08", "window": { "start": { "local": "1980-09-08T19:05:11+08:00", "utc": "1980-09-08T11:05:11Z", "ms": 337259110856.4941 }, "end": { "local": "1980-09-08T20:37:09+08:00", "utc": "1980-09-08T12:37:09Z", "ms": 337264628901.8932 } }, "covered_min": 0, "window_min": 92, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 14:25 on Sun 7 Sep to 16:03 on Mon 8 Sep.", "fact": "1980-09-07T06:25:24Z → 1980-09-08T08:02:46Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:06–20:38 on the 7th, 19:05–20:37 on the 8th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 92 of 92 minutes on the 7th and 0 of 92 on the 8th.", "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 10945 s" }, { "step": "ruling", "text": "Aghora Caturdaśī, Zunyi, 1980: Sunday 7 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": "1980-09-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-07", "confidence": "determinate" } ], "quote": "In Zunyi, Aghora Caturdaśī 1980 falls on Sunday 7 September. Caturdaśī runs from 14:25 on Sun 7 Sep to 16:03 on Mon 8 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/shivaratri?on=1980-09-07", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30198, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-09-07T14:25:24+08:00", "utc": "1980-09-07T06:25:24Z", "ms": 337155923733.89075 }, "end": { "local": "1980-09-08T16:02:46+08:00", "utc": "1980-09-08T08:02:46Z", "ms": 337248165803.0106 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-07T14:25:24+08:00", "utc": "1980-09-07T06:25:24Z", "ms": 337155923733.89075 }, "end": { "local": "1980-09-08T16:02:46+08:00", "utc": "1980-09-08T08:02:46Z", "ms": 337248165803.0106 } }, "kaala": "nishita", "days": [ { "local_date": "1980-09-07", "window": { "start": { "local": "1980-09-08T00:26:24+08:00", "utc": "1980-09-07T16:26:24Z", "ms": 337191983980.67285 }, "end": { "local": "1980-09-08T01:14:24+08:00", "utc": "1980-09-07T17:14:24Z", "ms": 337194863980.67285 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-08", "window": { "start": { "local": "1980-09-09T00:26:04+08:00", "utc": "1980-09-08T16:26:04Z", "ms": 337278363526.74084 }, "end": { "local": "1980-09-09T01:14:04+08:00", "utc": "1980-09-08T17:14:04Z", "ms": 337281243526.74084 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 14:25 on Sun 7 Sep to 16:03 on Mon 8 Sep.", "fact": "1980-09-07T06:25:24Z → 1980-09-08T08:02:46Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:26–01:14 on the 7th, 00:26–01:14 on the 8th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 7th and 0 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 30198 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Sunday 7 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": "1980-09-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-07", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Sunday 7 September. Caturdaśī runs from 14:25 on Sun 7 Sep to 16:03 on Mon 8 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-09-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/rudra-vrata", "festival": "rudra-vrata", "name": "Rudra Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17202, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1980-09-09T18:00:11+08:00", "utc": "1980-09-09T10:00:11Z", "ms": 337341610837.48444 }, "end": { "local": "1980-09-10T20:13:33+08:00", "utc": "1980-09-10T12:13:33Z", "ms": 337436013005.872 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-09T18:00:11+08:00", "utc": "1980-09-09T10:00:11Z", "ms": 337341610837.48444 }, "end": { "local": "1980-09-10T20:13:33+08:00", "utc": "1980-09-10T12:13:33Z", "ms": 337436013005.872 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-09", "window": { "start": { "local": "1980-09-09T12:25:29+08:00", "utc": "1980-09-09T04:25:29Z", "ms": 337321529144.06104 }, "end": { "local": "1980-09-09T13:13:29+08:00", "utc": "1980-09-09T05:13:29Z", "ms": 337324409144.06104 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-09-10", "window": { "start": { "local": "1980-09-10T12:25:08+08:00", "utc": "1980-09-10T04:25:08Z", "ms": 337407908401.745 }, "end": { "local": "1980-09-10T13:13:08+08:00", "utc": "1980-09-10T05:13:08Z", "ms": 337410788401.745 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 18:00 on Tue 9 Sep to 20:14 on Wed 10 Sep.", "fact": "1980-09-09T10:00:11Z → 1980-09-10T12:13:33Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 9th, 12:25–13:13 on the 10th.", "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 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 17202 s" }, { "step": "ruling", "text": "Rudra Vrata, Zunyi, 1980: Wednesday 10 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": "1980-09-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-10", "confidence": "determinate" } ], "quote": "In Zunyi, Rudra Vrata 1980 falls on Wednesday 10 September. Pratipadā runs from 18:00 on Tue 9 Sep to 20:14 on Wed 10 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/haritalika-vrata", "festival": "haritalika-vrata", "name": "Haritālikā Vrata", "everyday": "Hartalika Teej", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33925, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1980-09-11T22:38:13+08:00", "utc": "1980-09-11T14:38:13Z", "ms": 337531092974.1743 }, "end": { "local": "1980-09-13T01:08:29+08:00", "utc": "1980-09-12T17:08:29Z", "ms": 337626508927.3021 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-11T22:38:13+08:00", "utc": "1980-09-11T14:38:13Z", "ms": 337531092974.1743 }, "end": { "local": "1980-09-13T01:08:29+08:00", "utc": "1980-09-12T17:08:29Z", "ms": 337626508927.3021 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-11", "window": { "start": { "local": "1980-09-11T12:24:48+08:00", "utc": "1980-09-11T04:24:48Z", "ms": 337494287526.6262 }, "end": { "local": "1980-09-11T13:12:48+08:00", "utc": "1980-09-11T05:12:48Z", "ms": 337497167526.6262 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-09-12", "window": { "start": { "local": "1980-09-12T12:24:27+08:00", "utc": "1980-09-12T04:24:27Z", "ms": 337580666534.1156 }, "end": { "local": "1980-09-12T13:12:27+08:00", "utc": "1980-09-12T05:12:27Z", "ms": 337583546534.1156 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 22:38 on Thu 11 Sep to 01:08 on Sat 13 Sep.", "fact": "1980-09-11T14:38:13Z → 1980-09-12T17:08:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 11th, 12:24–13:12 on the 12th.", "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 11th and 48 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33925 s" }, { "step": "ruling", "text": "Haritālikā Vrata, Zunyi, 1980: Friday 12 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": "1980-09-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-12", "confidence": "determinate" } ], "quote": "In Zunyi, Haritālikā Vrata (Hartalika Teej) 1980 falls on Friday 12 September. Tṛtīyā runs from 22:38 on Thu 11 Sep to 01:08 on Sat 13 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ganesha-chaturthi", "festival": "ganesha-chaturthi", "name": "Gaṇeśa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31591, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-09-13T01:08:29+08:00", "utc": "1980-09-12T17:08:29Z", "ms": 337626508927.3021 }, "end": { "local": "1980-09-14T03:37:13+08:00", "utc": "1980-09-13T19:37:13Z", "ms": 337721833071.68964 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-13T01:08:29+08:00", "utc": "1980-09-12T17:08:29Z", "ms": 337626508927.3021 }, "end": { "local": "1980-09-14T03:37:13+08:00", "utc": "1980-09-13T19:37:13Z", "ms": 337721833071.68964 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-13", "window": { "start": { "local": "1980-09-13T12:24:05+08:00", "utc": "1980-09-13T04:24:05Z", "ms": 337667045441.54517 }, "end": { "local": "1980-09-13T13:12:05+08:00", "utc": "1980-09-13T05:12:05Z", "ms": 337669925441.54517 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-14", "window": { "start": { "local": "1980-09-14T12:23:44+08:00", "utc": "1980-09-14T04:23:44Z", "ms": 337753424265.6931 }, "end": { "local": "1980-09-14T13:11:44+08:00", "utc": "1980-09-14T05:11:44Z", "ms": 337756304265.6931 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 01:08 on Sat 13 Sep to 03:37 on Sun 14 Sep.", "fact": "1980-09-12T17:08:29Z → 1980-09-13T19:37:13Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:24–13:12 on the 13th, 12:24–13:12 on the 14th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 13th and 0 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 31591 s" }, { "step": "ruling", "text": "Gaṇeśa Caturthī, Zunyi, 1980: Saturday 13 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": "1980-09-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-13", "confidence": "determinate" } ], "quote": "In Zunyi, Gaṇeśa Caturthī 1980 falls on Saturday 13 September. Caturthī runs from 01:08 on Sat 13 Sep to 03:37 on Sun 14 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/rishi-panchami", "festival": "rishi-panchami", "name": "Ṛṣi Pañcamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23255, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-09-14T03:37:13+08:00", "utc": "1980-09-13T19:37:13Z", "ms": 337721833071.68964 }, "end": { "local": "1980-09-15T05:55:48+08:00", "utc": "1980-09-14T21:55:48Z", "ms": 337816547846.6931 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-14T03:37:13+08:00", "utc": "1980-09-13T19:37:13Z", "ms": 337721833071.68964 }, "end": { "local": "1980-09-15T05:55:48+08:00", "utc": "1980-09-14T21:55:48Z", "ms": 337816547846.6931 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-14", "window": { "start": { "local": "1980-09-14T12:23:44+08:00", "utc": "1980-09-14T04:23:44Z", "ms": 337753424265.6931 }, "end": { "local": "1980-09-14T13:11:44+08:00", "utc": "1980-09-14T05:11:44Z", "ms": 337756304265.6931 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-15", "window": { "start": { "local": "1980-09-15T12:23:23+08:00", "utc": "1980-09-15T04:23:23Z", "ms": 337839803024.0531 }, "end": { "local": "1980-09-15T13:11:23+08:00", "utc": "1980-09-15T05:11:23Z", "ms": 337842683024.0531 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 03:37 on Sun 14 Sep to 05:56 on Mon 15 Sep.", "fact": "1980-09-13T19:37:13Z → 1980-09-14T21:55:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:24–13:12 on the 14th, 12:23–13:11 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 23255 s" }, { "step": "ruling", "text": "Ṛṣi Pañcamī, Zunyi, 1980: Sunday 14 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": "1980-09-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-14", "confidence": "determinate" } ], "quote": "In Zunyi, Ṛṣi Pañcamī 1980 falls on Sunday 14 September. Pañcamī runs from 03:37 on Sun 14 Sep to 05:56 on Mon 15 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/surya-shashthi-bhadrapada", "festival": "surya-shashthi-bhadrapada", "name": "Sūrya Ṣaṣṭhī (Bhādrapada)", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16110, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-09-15T05:55:48+08:00", "utc": "1980-09-14T21:55:48Z", "ms": 337816547846.6931 }, "end": { "local": "1980-09-16T07:54:32+08:00", "utc": "1980-09-15T23:54:32Z", "ms": 337910072232.0292 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-15T05:55:48+08:00", "utc": "1980-09-14T21:55:48Z", "ms": 337816547846.6931 }, "end": { "local": "1980-09-16T07:54:32+08:00", "utc": "1980-09-15T23:54:32Z", "ms": 337910072232.0292 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-15", "window": { "start": { "local": "1980-09-15T12:23:23+08:00", "utc": "1980-09-15T04:23:23Z", "ms": 337839803024.0531 }, "end": { "local": "1980-09-15T13:11:23+08:00", "utc": "1980-09-15T05:11:23Z", "ms": 337842683024.0531 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-16", "window": { "start": { "local": "1980-09-16T12:23:02+08:00", "utc": "1980-09-16T04:23:02Z", "ms": 337926181734.59827 }, "end": { "local": "1980-09-16T13:11:02+08:00", "utc": "1980-09-16T05:11:02Z", "ms": 337929061734.59827 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 05:56 on Mon 15 Sep to 07:55 on Tue 16 Sep.", "fact": "1980-09-14T21:55:48Z → 1980-09-15T23:54:32Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:23–13:11 on the 15th, 12:23–13:11 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 16110 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī (Bhādrapada), Zunyi, 1980: Monday 15 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": "1980-09-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-15", "confidence": "determinate" } ], "quote": "In Zunyi, Sūrya Ṣaṣṭhī (Bhādrapada) 1980 falls on Monday 15 September. Ṣaṣṭhī runs from 05:56 on Mon 15 Sep to 07:55 on Tue 16 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/muktabharana-vrata", "festival": "muktabharana-vrata", "name": "Muktābharaṇa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10742, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1980-09-16T07:54:32+08:00", "utc": "1980-09-15T23:54:32Z", "ms": 337910072232.0292 }, "end": { "local": "1980-09-17T09:23:39+08:00", "utc": "1980-09-17T01:23:39Z", "ms": 338001818677.2136 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-16T07:54:32+08:00", "utc": "1980-09-15T23:54:32Z", "ms": 337910072232.0292 }, "end": { "local": "1980-09-17T09:23:39+08:00", "utc": "1980-09-17T01:23:39Z", "ms": 338001818677.2136 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-16", "window": { "start": { "local": "1980-09-16T12:23:02+08:00", "utc": "1980-09-16T04:23:02Z", "ms": 337926181734.59827 }, "end": { "local": "1980-09-16T13:11:02+08:00", "utc": "1980-09-16T05:11:02Z", "ms": 337929061734.59827 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-17", "window": { "start": { "local": "1980-09-17T12:22:40+08:00", "utc": "1980-09-17T04:22:40Z", "ms": 338012560415.81177 }, "end": { "local": "1980-09-17T13:10:40+08:00", "utc": "1980-09-17T05:10:40Z", "ms": 338015440415.81177 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 07:55 on Tue 16 Sep to 09:24 on Wed 17 Sep.", "fact": "1980-09-15T23:54:32Z → 1980-09-17T01:23:39Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:23–13:11 on the 16th, 12:23–13:11 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. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 10742 s" }, { "step": "ruling", "text": "Muktābharaṇa Vrata, Zunyi, 1980: Tuesday 16 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": "1980-09-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-16", "confidence": "determinate" } ], "quote": "In Zunyi, Muktābharaṇa Vrata 1980 falls on Tuesday 16 September. Saptamī runs from 07:55 on Tue 16 Sep to 09:24 on Wed 17 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/radhashtami", "festival": "radhashtami", "name": "Rādhāṣṭamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7671, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-09-17T09:23:39+08:00", "utc": "1980-09-17T01:23:39Z", "ms": 338001818677.2136 }, "end": { "local": "1980-09-18T10:14:28+08:00", "utc": "1980-09-18T02:14:28Z", "ms": 338091268327.4177 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-17T09:23:39+08:00", "utc": "1980-09-17T01:23:39Z", "ms": 338001818677.2136 }, "end": { "local": "1980-09-18T10:14:28+08:00", "utc": "1980-09-18T02:14:28Z", "ms": 338091268327.4177 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-17", "window": { "start": { "local": "1980-09-17T12:22:40+08:00", "utc": "1980-09-17T04:22:40Z", "ms": 338012560415.81177 }, "end": { "local": "1980-09-17T13:10:40+08:00", "utc": "1980-09-17T05:10:40Z", "ms": 338015440415.81177 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-18", "window": { "start": { "local": "1980-09-18T12:22:19+08:00", "utc": "1980-09-18T04:22:19Z", "ms": 338098939086.74243 }, "end": { "local": "1980-09-18T13:10:19+08:00", "utc": "1980-09-18T05:10:19Z", "ms": 338101819086.74243 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 09:24 on Wed 17 Sep to 10:14 on Thu 18 Sep.", "fact": "1980-09-17T01:23:39Z → 1980-09-18T02:14:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:23–13:11 on the 17th, 12:22–13:10 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 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: unstated → only-day · margin 7671 s" }, { "step": "ruling", "text": "Rādhāṣṭamī, Zunyi, 1980: Wednesday 17 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": "1980-09-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-17", "confidence": "determinate" } ], "quote": "In Zunyi, Rādhāṣṭamī 1980 falls on Wednesday 17 September. Aṣṭamī runs from 09:24 on Wed 17 Sep to 10:14 on Thu 18 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-09-21", "festival": "ekadashi", "name": "Parivartanī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5398, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-09-20T09:39:16+08:00", "utc": "1980-09-20T01:39:16Z", "ms": 338261955919.14197 }, "end": { "local": "1980-09-21T08:10:25+08:00", "utc": "1980-09-21T00:10:25Z", "ms": 338343024854.27075 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-20T09:39:16+08:00", "utc": "1980-09-20T01:39:16Z", "ms": 338261955919.14197 }, "end": { "local": "1980-09-21T08:10:25+08:00", "utc": "1980-09-21T00:10:25Z", "ms": 338343024854.27075 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-09-20", "window": { "start": { "local": "1980-09-20T06:39:59+08:00", "utc": "1980-09-19T22:39:59Z", "ms": 338251198768.994 }, "end": { "local": "1980-09-20T06:39:59+08:00", "utc": "1980-09-19T22:39:59Z", "ms": 338251198768.994 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-09-21", "window": { "start": { "local": "1980-09-21T06:40:26+08:00", "utc": "1980-09-20T22:40:26Z", "ms": 338337626479.40295 }, "end": { "local": "1980-09-21T06:40:26+08:00", "utc": "1980-09-20T22:40:26Z", "ms": 338337626479.40295 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 09:39 on Sat 20 Sep to 08:10 on Sun 21 Sep.", "fact": "1980-09-20T01:39:16Z → 1980-09-21T00:10:25Z" }, { "step": "kaala", "text": "Sunrise is at 06:40 on the 20th and 06:40 on the 21st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 20th and is on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 5398 s" }, { "step": "ruling", "text": "Parivartanī Ekādaśī, Zunyi, 1980: Sunday 21 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": "1980-09-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-21", "confidence": "determinate" } ], "quote": "In Zunyi, Parivartanī Ekādaśī 1980 falls on Sunday 21 September. Ekādaśī runs from 09:39 on Sat 20 Sep to 08:10 on Sun 21 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-09-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/vamana-jayanti", "festival": "vamana-jayanti", "name": "Vāmana Jayantī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15050, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-09-21T08:10:25+08:00", "utc": "1980-09-21T00:10:25Z", "ms": 338343024854.27075 }, "end": { "local": "1980-09-22T05:57:42+08:00", "utc": "1980-09-21T21:57:42Z", "ms": 338421461602.8888 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-21T08:10:25+08:00", "utc": "1980-09-21T00:10:25Z", "ms": 338343024854.27075 }, "end": { "local": "1980-09-22T05:57:42+08:00", "utc": "1980-09-21T21:57:42Z", "ms": 338421461602.8888 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-09-21", "window": { "start": { "local": "1980-09-21T12:21:15+08:00", "utc": "1980-09-21T04:21:15Z", "ms": 338358075238.9862 }, "end": { "local": "1980-09-21T13:09:15+08:00", "utc": "1980-09-21T05:09:15Z", "ms": 338360955238.9862 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-09-22", "window": { "start": { "local": "1980-09-22T12:20:54+08:00", "utc": "1980-09-22T04:20:54Z", "ms": 338444454074.4402 }, "end": { "local": "1980-09-22T13:08:54+08:00", "utc": "1980-09-22T05:08:54Z", "ms": 338447334074.4402 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 08:10 on Sun 21 Sep to 05:58 on Mon 22 Sep.", "fact": "1980-09-21T00:10:25Z → 1980-09-21T21:57:42Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:21–13:09 on the 21st, 12:21–13:09 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 48 of 48 minutes on the 21st and 0 of 48 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15050 s" }, { "step": "ruling", "text": "Vāmana Jayantī, Zunyi, 1980: Sunday 21 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": "1980-09-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-21", "confidence": "determinate" } ], "quote": "In Zunyi, Vāmana Jayantī 1980 falls on Sunday 21 September. Dvādaśī runs from 08:10 on Sun 21 Sep to 05:58 on Mon 22 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-09-22", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24204, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-09-22T05:57:42+08:00", "utc": "1980-09-21T21:57:42Z", "ms": 338421461602.8888 }, "end": { "local": "1980-09-23T03:07:18+08:00", "utc": "1980-09-22T19:07:18Z", "ms": 338497637877.7006 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-22T05:57:42+08:00", "utc": "1980-09-21T21:57:42Z", "ms": 338421461602.8888 }, "end": { "local": "1980-09-23T03:07:18+08:00", "utc": "1980-09-22T19:07:18Z", "ms": 338497637877.7006 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-09-21", "window": { "start": { "local": "1980-09-21T18:50:04+08:00", "utc": "1980-09-21T10:50:04Z", "ms": 338381403998.5695 }, "end": { "local": "1980-09-21T20:24:51+08:00", "utc": "1980-09-21T12:24:51Z", "ms": 338387090702.8482 } }, "covered_min": 0, "window_min": 95, "qualifies": false }, { "local_date": "1980-09-22", "window": { "start": { "local": "1980-09-22T18:48:54+08:00", "utc": "1980-09-22T10:48:54Z", "ms": 338467733868.2205 }, "end": { "local": "1980-09-22T20:23:54+08:00", "utc": "1980-09-22T12:23:54Z", "ms": 338473433644.429 } }, "covered_min": 95, "window_min": 95, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 05:58 on Mon 22 Sep to 03:07 on Tue 23 Sep.", "fact": "1980-09-21T21:57:42Z → 1980-09-22T19:07:18Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:50–20:25 on the 21st, 18:49–20:24 on the 22nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 95 minutes on the 21st and 95 of 95 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 24204 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Monday 22 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": "1980-09-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-22", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Monday 22 September. Trayodaśī runs from 05:58 on Mon 22 Sep to 03:07 on Tue 23 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-09-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ananta-chaturdashi", "festival": "ananta-chaturdashi", "name": "Ananta Caturdaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12844, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-09-23T03:07:18+08:00", "utc": "1980-09-22T19:07:18Z", "ms": 338497637877.7006 }, "end": { "local": "1980-09-23T23:47:26+08:00", "utc": "1980-09-23T15:47:26Z", "ms": 338572046238.6867 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1980-09-23T03:07:18+08:00", "utc": "1980-09-22T19:07:18Z", "ms": 338497637877.7006 }, "end": { "local": "1980-09-23T23:47:26+08:00", "utc": "1980-09-23T15:47:26Z", "ms": 338572046238.6867 } }, "kaala": "udaya-3", "days": [ { "local_date": "1980-09-23", "window": { "start": { "local": "1980-09-23T06:41:22+08:00", "utc": "1980-09-22T22:41:22Z", "ms": 338510482189.7844 }, "end": { "local": "1980-09-23T09:06:39+08:00", "utc": "1980-09-23T01:06:39Z", "ms": 338519198516.8181 } }, "covered_min": 145, "window_min": 145, "qualifies": true }, { "local_date": "1980-09-24", "window": { "start": { "local": "1980-09-24T06:41:50+08:00", "utc": "1980-09-23T22:41:50Z", "ms": 338596910225.3175 }, "end": { "local": "1980-09-24T09:06:47+08:00", "utc": "1980-09-24T01:06:47Z", "ms": 338605606960.1822 } }, "covered_min": 0, "window_min": 145, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 03:07 on Tue 23 Sep to 23:47 on Tue 23 Sep.", "fact": "1980-09-22T19:07:18Z → 1980-09-23T15:47:26Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:41–09:07 on the 23rd, 06:42–09:07 on the 24th.", "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 23rd and 0 of 145 on the 24th.", "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 12844 s" }, { "step": "ruling", "text": "Ananta Caturdaśī, Zunyi, 1980: Tuesday 23 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": "1980-09-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-23", "confidence": "determinate" } ], "quote": "In Zunyi, Ananta Caturdaśī 1980 falls on Tuesday 23 September. Caturdaśī runs from 03:07 on Tue 23 Sep to 23:47 on Tue 23 Sep and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-09-27", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30743, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-09-27T08:55:07+08:00", "utc": "1980-09-27T00:55:07Z", "ms": 338864106962.4855 }, "end": { "local": "1980-09-28T05:41:53+08:00", "utc": "1980-09-27T21:41:53Z", "ms": 338938912987.2614 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-09-27T08:55:07+08:00", "utc": "1980-09-27T00:55:07Z", "ms": 338864106962.4855 }, "end": { "local": "1980-09-28T05:41:53+08:00", "utc": "1980-09-27T21:41:53Z", "ms": 338938912987.2614 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-09-26", "window": { "start": { "local": "1980-09-26T20:23:40+08:00", "utc": "1980-09-26T12:23:40Z", "ms": 338819019942.12244 }, "end": { "local": "1980-09-26T20:23:40+08:00", "utc": "1980-09-26T12:23:40Z", "ms": 338819019942.12244 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-09-27", "window": { "start": { "local": "1980-09-27T21:09:30+08:00", "utc": "1980-09-27T13:09:30Z", "ms": 338908169559.5229 }, "end": { "local": "1980-09-27T21:09:30+08:00", "utc": "1980-09-27T13:09:30Z", "ms": 338908169559.5229 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 08:55 on Sat 27 Sep to 05:42 on Sun 28 Sep.", "fact": "1980-09-27T00:55:07Z → 1980-09-27T21:41:53Z" }, { "step": "kaala", "text": "Moonrise is at 20:24 on the 26th and 21:09 on the 27th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 26th and is on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 30743 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Saturday 27 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": "1980-09-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-27", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Saturday 27 September. Caturthī runs from 08:55 on Sat 27 Sep to 05:42 on Sun 28 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-09-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/chandra-shashthi", "festival": "chandra-shashthi", "name": "Candra Ṣaṣṭhī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7807, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-09-29T03:00:16+08:00", "utc": "1980-09-28T19:00:16Z", "ms": 339015615920.32355 }, "end": { "local": "1980-09-30T00:57:47+08:00", "utc": "1980-09-29T16:57:47Z", "ms": 339094667158.69916 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-09-29T03:00:16+08:00", "utc": "1980-09-28T19:00:16Z", "ms": 339015615920.32355 }, "end": { "local": "1980-09-30T00:57:47+08:00", "utc": "1980-09-29T16:57:47Z", "ms": 339094667158.69916 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-09-28", "window": { "start": { "local": "1980-09-28T21:57:23+08:00", "utc": "1980-09-28T13:57:23Z", "ms": 338997443305.9635 }, "end": { "local": "1980-09-28T21:57:23+08:00", "utc": "1980-09-28T13:57:23Z", "ms": 338997443305.9635 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-09-29", "window": { "start": { "local": "1980-09-29T22:47:40+08:00", "utc": "1980-09-29T14:47:40Z", "ms": 339086859668.75476 }, "end": { "local": "1980-09-29T22:47:40+08:00", "utc": "1980-09-29T14:47:40Z", "ms": 339086859668.75476 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 03:00 on Mon 29 Sep to 00:58 on Tue 30 Sep.", "fact": "1980-09-28T19:00:16Z → 1980-09-29T16:57:47Z" }, { "step": "kaala", "text": "Moonrise is at 21:57 on the 28th and 22:48 on the 29th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Ṣaṣṭhī 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. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 7807 s" }, { "step": "ruling", "text": "Candra Ṣaṣṭhī, Zunyi, 1980: Monday 29 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "chandra-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 6 Candra sasthi (Sasthi current at moon-rise, if occurs on two successive days, it is to be observed on the first day)." } ], "kaala": "moonrise", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-09-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-29", "confidence": "determinate" } ], "quote": "In Zunyi, Candra Ṣaṣṭhī 1980 falls on Monday 29 September. Ṣaṣṭhī runs from 03:00 on Mon 29 Sep to 00:58 on Tue 30 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/mahalakshmi-vrata-samapana", "festival": "mahalakshmi-vrata-samapana", "name": "Mahālakṣmī Vrata Samāpana", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-09-30", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 33, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-09-30T23:39:35+08:00", "utc": "1980-09-30T15:39:35Z", "ms": 339176375483.0235 }, "end": { "local": "1980-10-01T23:07:51+08:00", "utc": "1980-10-01T15:07:51Z", "ms": 339260870638.37726 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-09-30T23:39:35+08:00", "utc": "1980-09-30T15:39:35Z", "ms": 339176375483.0235 }, "end": { "local": "1980-10-01T23:07:51+08:00", "utc": "1980-10-01T15:07:51Z", "ms": 339260870638.37726 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-09-30", "window": { "start": { "local": "1980-09-30T23:40:08+08:00", "utc": "1980-09-30T15:40:08Z", "ms": 339176408420.5927 }, "end": { "local": "1980-09-30T23:40:08+08:00", "utc": "1980-09-30T15:40:08Z", "ms": 339176408420.5927 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-10-01", "window": { "start": { "local": "1980-10-02T00:34:13+08:00", "utc": "1980-10-01T16:34:13Z", "ms": 339266052585.73737 }, "end": { "local": "1980-10-02T00:34:13+08:00", "utc": "1980-10-01T16:34:13Z", "ms": 339266052585.73737 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 23:40 on Tue 30 Sep to 23:08 on Wed 1 Oct.", "fact": "1980-09-30T15:39:35Z → 1980-10-01T15:07:51Z" }, { "step": "kaala", "text": "Moonrise is at 23:40 on the 30th and 00:34 on the 1st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is on the 30th and is not on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33 s < 300 s" }, { "step": "ruling", "text": "Mahālakṣmī Vrata Samāpana, Zunyi, 1980: Tuesday 30 September.", "fact": "confidence: boundary (margin)" } ], "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": "1980-09-30", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-09-30", "confidence": "boundary" } ], "quote": "In Zunyi, Mahālakṣmī Vrata Samāpana 1980 falls on Tuesday 30 September. Aṣṭamī runs from 23:40 on Tue 30 Sep to 23:08 on Wed 1 Oct and is current at moonrise that day. It is 0 min 33 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/jitashtami", "festival": "jitashtami", "name": "Jitāṣṭamī", "everyday": "Jitiya", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10343, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-09-30T23:39:35+08:00", "utc": "1980-09-30T15:39:35Z", "ms": 339176375483.0235 }, "end": { "local": "1980-10-01T23:07:51+08:00", "utc": "1980-10-01T15:07:51Z", "ms": 339260870638.37726 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-09-30T23:39:35+08:00", "utc": "1980-09-30T15:39:35Z", "ms": 339176375483.0235 }, "end": { "local": "1980-10-01T23:07:51+08:00", "utc": "1980-10-01T15:07:51Z", "ms": 339260870638.37726 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-09-30", "window": { "start": { "local": "1980-09-30T18:39:39+08:00", "utc": "1980-09-30T10:39:39Z", "ms": 339158378558.50323 }, "end": { "local": "1980-09-30T20:16:23+08:00", "utc": "1980-09-30T12:16:23Z", "ms": 339164182971.8181 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "1980-10-01", "window": { "start": { "local": "1980-10-01T18:38:30+08:00", "utc": "1980-10-01T10:38:30Z", "ms": 339244710315.58075 }, "end": { "local": "1980-10-01T20:15:28+08:00", "utc": "1980-10-01T12:15:28Z", "ms": 339250527791.22327 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 23:40 on Tue 30 Sep to 23:08 on Wed 1 Oct.", "fact": "1980-09-30T15:39:35Z → 1980-10-01T15:07:51Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:40–20:16 on the 30th, 18:39–20:15 on the 1st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during pradoṣa. It covers 0 of 97 minutes on the 30th and 97 of 97 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 10343 s" }, { "step": "ruling", "text": "Jitāṣṭamī, Zunyi, 1980: Wednesday 1 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": "1980-10-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-01", "confidence": "determinate" } ], "quote": "In Zunyi, Jitāṣṭamī (Jitiya) 1980 falls on Wednesday 1 October. Aṣṭamī runs from 23:40 on Tue 30 Sep to 23:08 on Wed 1 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-10-04", "festival": "ekadashi", "name": "Indirā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18135, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-10-04T00:16:00+08:00", "utc": "1980-10-03T16:16:00Z", "ms": 339437759848.77203 }, "end": { "local": "1980-10-05T01:44:57+08:00", "utc": "1980-10-04T17:44:57Z", "ms": 339529496890.92804 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-04T00:16:00+08:00", "utc": "1980-10-03T16:16:00Z", "ms": 339437759848.77203 }, "end": { "local": "1980-10-05T01:44:57+08:00", "utc": "1980-10-04T17:44:57Z", "ms": 339529496890.92804 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-10-04", "window": { "start": { "local": "1980-10-04T06:46:42+08:00", "utc": "1980-10-03T22:46:42Z", "ms": 339461201677.6286 }, "end": { "local": "1980-10-04T06:46:42+08:00", "utc": "1980-10-03T22:46:42Z", "ms": 339461201677.6286 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-10-05", "window": { "start": { "local": "1980-10-05T06:47:12+08:00", "utc": "1980-10-04T22:47:12Z", "ms": 339547632268.712 }, "end": { "local": "1980-10-05T06:47:12+08:00", "utc": "1980-10-04T22:47:12Z", "ms": 339547632268.712 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 00:16 on Sat 4 Oct to 01:45 on Sun 5 Oct.", "fact": "1980-10-03T16:16:00Z → 1980-10-04T17:44:57Z" }, { "step": "kaala", "text": "Sunrise is at 06:47 on the 4th and 06:47 on the 5th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 4th and is not on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 18135 s" }, { "step": "ruling", "text": "Indirā Ekādaśī, Zunyi, 1980: Saturday 4 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": "1980-10-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-04", "confidence": "determinate" } ], "quote": "In Zunyi, Indirā Ekādaśī 1980 falls on Saturday 4 October. Ekādaśī runs from 00:16 on Sat 4 Oct to 01:45 on Sun 5 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-10-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-10-06", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26908, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-10-06T03:40:19+08:00", "utc": "1980-10-05T19:40:19Z", "ms": 339622818873.43475 }, "end": { "local": "1980-10-07T05:54:06+08:00", "utc": "1980-10-06T21:54:06Z", "ms": 339717246202.8446 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-06T03:40:19+08:00", "utc": "1980-10-05T19:40:19Z", "ms": 339622818873.43475 }, "end": { "local": "1980-10-07T05:54:06+08:00", "utc": "1980-10-06T21:54:06Z", "ms": 339717246202.8446 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-10-05", "window": { "start": { "local": "1980-10-05T18:34:01+08:00", "utc": "1980-10-05T10:34:01Z", "ms": 339590041162.4603 }, "end": { "local": "1980-10-05T20:11:51+08:00", "utc": "1980-10-05T12:11:51Z", "ms": 339595910763.2497 } }, "covered_min": 0, "window_min": 98, "qualifies": false }, { "local_date": "1980-10-06", "window": { "start": { "local": "1980-10-06T18:32:55+08:00", "utc": "1980-10-06T10:32:55Z", "ms": 339676374959.1642 }, "end": { "local": "1980-10-06T20:10:58+08:00", "utc": "1980-10-06T12:10:58Z", "ms": 339682257549.3386 } }, "covered_min": 98, "window_min": 98, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 03:40 on Mon 6 Oct to 05:54 on Tue 7 Oct.", "fact": "1980-10-05T19:40:19Z → 1980-10-06T21:54:06Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:34–20:12 on the 5th, 18:33–20:11 on the 6th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 98 minutes on the 5th and 98 of 98 on the 6th.", "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 26908 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Monday 6 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": "1980-10-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-06", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Monday 6 October. Trayodaśī runs from 03:40 on Mon 6 Oct to 05:54 on Tue 7 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-10-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-10-07", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17372, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-10-07T05:54:06+08:00", "utc": "1980-10-06T21:54:06Z", "ms": 339717246202.8446 }, "end": { "local": "1980-10-08T08:19:11+08:00", "utc": "1980-10-08T00:19:11Z", "ms": 339812350664.28735 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-07T05:54:06+08:00", "utc": "1980-10-06T21:54:06Z", "ms": 339717246202.8446 }, "end": { "local": "1980-10-08T08:19:11+08:00", "utc": "1980-10-08T00:19:11Z", "ms": 339812350664.28735 } }, "kaala": "nishita", "days": [ { "local_date": "1980-10-06", "window": { "start": { "local": "1980-10-07T00:16:35+08:00", "utc": "1980-10-06T16:16:35Z", "ms": 339696994672.3183 }, "end": { "local": "1980-10-07T01:04:35+08:00", "utc": "1980-10-06T17:04:35Z", "ms": 339699874672.3183 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-10-07", "window": { "start": { "local": "1980-10-08T00:16:18+08:00", "utc": "1980-10-07T16:16:18Z", "ms": 339783377584.6819 }, "end": { "local": "1980-10-08T01:04:18+08:00", "utc": "1980-10-07T17:04:18Z", "ms": 339786257584.6819 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 05:54 on Tue 7 Oct to 08:19 on Wed 8 Oct.", "fact": "1980-10-06T21:54:06Z → 1980-10-08T00:19:11Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:17–01:05 on the 6th, 00:16–01:04 on the 7th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 6th and 48 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 17372 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Tuesday 7 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": "1980-10-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-07", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Tuesday 7 October. Caturdaśī runs from 05:54 on Tue 7 Oct to 08:19 on Wed 8 Oct and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-10-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/mahalaya-amavasya", "festival": "mahalaya-amavasya", "name": "Mahālaya Amāvāsyā", "everyday": "Sarvapitṛ Amāvāsyā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10793, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1980-10-08T08:19:11+08:00", "utc": "1980-10-08T00:19:11Z", "ms": 339812350664.28735 }, "end": { "local": "1980-10-09T10:49:37+08:00", "utc": "1980-10-09T02:49:37Z", "ms": 339907777358.135 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-08T08:19:11+08:00", "utc": "1980-10-08T00:19:11Z", "ms": 339812350664.28735 }, "end": { "local": "1980-10-09T10:49:37+08:00", "utc": "1980-10-09T02:49:37Z", "ms": 339907777358.135 } }, "kaala": "aparahna", "days": [ { "local_date": "1980-10-08", "window": { "start": { "local": "1980-10-08T13:49:57+08:00", "utc": "1980-10-08T05:49:57Z", "ms": 339832196791.434 }, "end": { "local": "1980-10-08T16:10:20+08:00", "utc": "1980-10-08T08:10:20Z", "ms": 339840620412.4825 } }, "covered_min": 140, "window_min": 140, "qualifies": true }, { "local_date": "1980-10-09", "window": { "start": { "local": "1980-10-09T13:49:31+08:00", "utc": "1980-10-09T05:49:31Z", "ms": 339918570738.94653 }, "end": { "local": "1980-10-09T16:09:35+08:00", "utc": "1980-10-09T08:09:35Z", "ms": 339926975050.38727 } }, "covered_min": 0, "window_min": 140, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 08:19 on Wed 8 Oct to 10:50 on Thu 9 Oct.", "fact": "1980-10-08T00:19:11Z → 1980-10-09T02:49:37Z" }, { "step": "kaala", "text": "Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:50–16:10 on the 8th, 13:50–16:10 on the 9th.", "fact": "aparahna: day-muhurta-10-12 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during aparāhṇa. It covers 140 of 140 minutes on the 8th and 0 of 140 on the 9th.", "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 10793 s" }, { "step": "ruling", "text": "Mahālaya Amāvāsyā, Zunyi, 1980: Wednesday 8 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": "1980-10-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-08", "confidence": "determinate" } ], "quote": "In Zunyi, Mahālaya Amāvāsyā 1980 falls on Wednesday 8 October. Amāvasyā runs from 08:19 on Wed 8 Oct to 10:50 on Thu 9 Oct and covers all of aparāhṇa that afternoon.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/navaratra-arambha", "festival": "navaratra-arambha", "name": "Navarātrārambha", "everyday": "Navratri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1040, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1980-10-09T10:49:37+08:00", "utc": "1980-10-09T02:49:37Z", "ms": 339907777358.135 }, "end": { "local": "1980-10-10T13:20:33+08:00", "utc": "1980-10-10T05:20:33Z", "ms": 340003232767.0565 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-09T10:49:37+08:00", "utc": "1980-10-09T02:49:37Z", "ms": 339907777358.135 }, "end": { "local": "1980-10-10T13:20:33+08:00", "utc": "1980-10-10T05:20:33Z", "ms": 340003232767.0565 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-10-09", "window": { "start": { "local": "1980-10-09T12:15:29+08:00", "utc": "1980-10-09T04:15:29Z", "ms": 339912928583.22614 }, "end": { "local": "1980-10-09T13:03:29+08:00", "utc": "1980-10-09T05:03:29Z", "ms": 339915808583.22614 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-10-10", "window": { "start": { "local": "1980-10-10T12:15:13+08:00", "utc": "1980-10-10T04:15:13Z", "ms": 339999312636.542 }, "end": { "local": "1980-10-10T13:03:13+08:00", "utc": "1980-10-10T05:03:13Z", "ms": 340002192636.542 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 10:50 on Thu 9 Oct to 13:21 on Fri 10 Oct.", "fact": "1980-10-09T02:49:37Z → 1980-10-10T05:20:33Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:15–13:03 on the 9th, 12:15–13:03 on the 10th.", "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 9th and 48 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Both middays qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 1040 s" }, { "step": "ruling", "text": "Navarātrārambha, Zunyi, 1980: Friday 10 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": "1980-10-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-10", "confidence": "determinate" } ], "quote": "In Zunyi, Navarātrārambha (Navratri) 1980 falls on Friday 10 October. Pratipadā runs from 10:50 on Thu 9 Oct to 13:21 on Fri 10 Oct 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/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-10-13", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18176, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-10-12T18:05:38+08:00", "utc": "1980-10-12T10:05:38Z", "ms": 340193138257.8528 }, "end": { "local": "1980-10-13T20:09:21+08:00", "utc": "1980-10-13T12:09:21Z", "ms": 340286960592.91583 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-12T18:05:38+08:00", "utc": "1980-10-12T10:05:38Z", "ms": 340193138257.8528 }, "end": { "local": "1980-10-13T20:09:21+08:00", "utc": "1980-10-13T12:09:21Z", "ms": 340286960592.91583 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-10-12", "window": { "start": { "local": "1980-10-12T12:14:42+08:00", "utc": "1980-10-12T04:14:42Z", "ms": 340172082160.5851 }, "end": { "local": "1980-10-12T13:02:42+08:00", "utc": "1980-10-12T05:02:42Z", "ms": 340174962160.5851 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-10-13", "window": { "start": { "local": "1980-10-13T12:14:28+08:00", "utc": "1980-10-13T04:14:28Z", "ms": 340258467663.22095 }, "end": { "local": "1980-10-13T13:02:28+08:00", "utc": "1980-10-13T05:02:28Z", "ms": 340261347663.22095 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:06 on Sun 12 Oct to 20:09 on Mon 13 Oct.", "fact": "1980-10-12T10:05:38Z → 1980-10-13T12:09:21Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:15–13:03 on the 12th, 12:14–13:02 on the 13th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 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 midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18176 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Monday 13 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": "1980-10-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-13", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Monday 13 October. Caturthī runs from 18:06 on Sun 12 Oct to 20:09 on Mon 13 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-10-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/durga-saptami", "festival": "durga-saptami", "name": "Durgā Saptamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25808, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1980-10-15T23:05:42+08:00", "utc": "1980-10-15T15:05:42Z", "ms": 340470341784.02826 }, "end": { "local": "1980-10-16T23:43:38+08:00", "utc": "1980-10-16T15:43:38Z", "ms": 340559017585.4461 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-15T23:05:42+08:00", "utc": "1980-10-15T15:05:42Z", "ms": 340470341784.02826 }, "end": { "local": "1980-10-16T23:43:38+08:00", "utc": "1980-10-16T15:43:38Z", "ms": 340559017585.4461 } }, "kaala": "udaya-1", "days": [ { "local_date": "1980-10-16", "window": { "start": { "local": "1980-10-16T06:53:11+08:00", "utc": "1980-10-15T22:53:11Z", "ms": 340498390840.3676 }, "end": { "local": "1980-10-16T07:39:08+08:00", "utc": "1980-10-15T23:39:08Z", "ms": 340501147704.85284 } }, "covered_min": 46, "window_min": 46, "qualifies": true }, { "local_date": "1980-10-17", "window": { "start": { "local": "1980-10-17T06:53:46+08:00", "utc": "1980-10-16T22:53:46Z", "ms": 340584825615.19855 }, "end": { "local": "1980-10-17T07:39:36+08:00", "utc": "1980-10-16T23:39:36Z", "ms": 340587576197.3969 } }, "covered_min": 0, "window_min": 46, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 23:06 on Wed 15 Oct to 23:44 on Thu 16 Oct.", "fact": "1980-10-15T15:05:42Z → 1980-10-16T15:43:38Z" }, { "step": "kaala", "text": "The first muhūrta after sunrise is 1st of 15 day muhūrtas: 06:53–07:39 on the 16th, 06:54–07:40 on the 17th.", "fact": "udaya-1: day-muhurta-1-1 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must hold through the first muhūrta after sunrise. It covers 46 of 46 minutes on the 16th and 0 of 46 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one morning qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 25808 s" }, { "step": "ruling", "text": "Durgā Saptamī, Zunyi, 1980: Thursday 16 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "durga-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Durga saptami (paraviddha) — covering one muhurta from sunrise" } ], "kaala": "udaya-1", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-16", "confidence": "determinate" } ], "quote": "In Zunyi, Durgā Saptamī 1980 falls on Thursday 16 October. Saptamī runs from 23:06 on Wed 15 Oct to 23:44 on Thu 16 Oct and covers all of the first muhūrta after sunrise that morning.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/mahashtami", "festival": "mahashtami", "name": "Mahāṣṭamī", "everyday": "Durga Ashtami", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38286, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-10-16T23:43:38+08:00", "utc": "1980-10-16T15:43:38Z", "ms": 340559017585.4461 }, "end": { "local": "1980-10-17T23:39:41+08:00", "utc": "1980-10-17T15:39:41Z", "ms": 340645181265.48254 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-16T23:43:38+08:00", "utc": "1980-10-16T15:43:38Z", "ms": 340559017585.4461 }, "end": { "local": "1980-10-17T23:39:41+08:00", "utc": "1980-10-17T15:39:41Z", "ms": 340645181265.48254 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-10-16", "window": { "start": { "local": "1980-10-16T12:13:47+08:00", "utc": "1980-10-16T04:13:47Z", "ms": 340517627324.00684 }, "end": { "local": "1980-10-16T13:01:47+08:00", "utc": "1980-10-16T05:01:47Z", "ms": 340520507324.00684 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-10-17", "window": { "start": { "local": "1980-10-17T12:13:35+08:00", "utc": "1980-10-17T04:13:35Z", "ms": 340604014981.68646 }, "end": { "local": "1980-10-17T13:01:35+08:00", "utc": "1980-10-17T05:01:35Z", "ms": 340606894981.68646 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 23:44 on Thu 16 Oct to 23:40 on Fri 17 Oct.", "fact": "1980-10-16T15:43:38Z → 1980-10-17T15:39:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:14–13:02 on the 16th, 12:14–13:02 on the 17th.", "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 16th and 48 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 38286 s" }, { "step": "ruling", "text": "Mahāṣṭamī, Zunyi, 1980: Friday 17 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": "1980-10-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-17", "confidence": "determinate" } ], "quote": "In Zunyi, Mahāṣṭamī (Durga Ashtami) 1980 falls on Friday 17 October. Aṣṭamī runs from 23:44 on Thu 16 Oct to 23:40 on Fri 17 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/mahanavami", "festival": "mahanavami", "name": "Mahānavamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35335, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1980-10-17T23:39:41+08:00", "utc": "1980-10-17T15:39:41Z", "ms": 340645181265.48254 }, "end": { "local": "1980-10-18T22:50:18+08:00", "utc": "1980-10-18T14:50:18Z", "ms": 340728618452.6427 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-17T23:39:41+08:00", "utc": "1980-10-17T15:39:41Z", "ms": 340645181265.48254 }, "end": { "local": "1980-10-18T22:50:18+08:00", "utc": "1980-10-18T14:50:18Z", "ms": 340728618452.6427 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-10-17", "window": { "start": { "local": "1980-10-17T12:13:35+08:00", "utc": "1980-10-17T04:13:35Z", "ms": 340604014981.68646 }, "end": { "local": "1980-10-17T13:01:35+08:00", "utc": "1980-10-17T05:01:35Z", "ms": 340606894981.68646 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-10-18", "window": { "start": { "local": "1980-10-18T12:13:23+08:00", "utc": "1980-10-18T04:13:23Z", "ms": 340690403218.4158 }, "end": { "local": "1980-10-18T13:01:23+08:00", "utc": "1980-10-18T05:01:23Z", "ms": 340693283218.4158 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 23:40 on Fri 17 Oct to 22:50 on Sat 18 Oct.", "fact": "1980-10-17T15:39:41Z → 1980-10-18T14:50:18Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:14–13:02 on the 17th, 12:13–13:01 on the 18th.", "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 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: purvaviddha → only-day · margin 35335 s" }, { "step": "ruling", "text": "Mahānavamī, Zunyi, 1980: Saturday 18 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": "1980-10-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-18", "confidence": "determinate" } ], "quote": "In Zunyi, Mahānavamī 1980 falls on Saturday 18 October. Navamī runs from 23:40 on Fri 17 Oct to 22:50 on Sat 18 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vijaya-dashami", "festival": "vijaya-dashami", "name": "Vijayā Daśamī", "everyday": "Dussehra", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6756, "anga": { "type": "tithi", "index": 9, "key": "dashami", "name": "Daśamī", "start": { "local": "1980-10-18T22:50:18+08:00", "utc": "1980-10-18T14:50:18Z", "ms": 340728618452.6427 }, "end": { "local": "1980-10-19T21:14:57+08:00", "utc": "1980-10-19T13:14:57Z", "ms": 340809297157.7681 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-18T22:50:18+08:00", "utc": "1980-10-18T14:50:18Z", "ms": 340728618452.6427 }, "end": { "local": "1980-10-19T21:14:57+08:00", "utc": "1980-10-19T13:14:57Z", "ms": 340809297157.7681 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-10-18", "window": { "start": { "local": "1980-10-18T12:13:23+08:00", "utc": "1980-10-18T04:13:23Z", "ms": 340690403218.4158 }, "end": { "local": "1980-10-18T13:01:23+08:00", "utc": "1980-10-18T05:01:23Z", "ms": 340693283218.4158 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-10-19", "window": { "start": { "local": "1980-10-19T12:13:12+08:00", "utc": "1980-10-19T04:13:12Z", "ms": 340776792050.95105 }, "end": { "local": "1980-10-19T13:01:12+08:00", "utc": "1980-10-19T05:01:12Z", "ms": 340779672050.95105 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Daśamī runs from 22:50 on Sat 18 Oct to 21:15 on Sun 19 Oct.", "fact": "1980-10-18T14:50:18Z → 1980-10-19T13:14:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 18th, 12:13–13:01 on the 19th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Daśamī touches Śravaṇa in the day time on neither day, so the rest of the rule applies. Daśamī 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: unstated → only-day · margin 6756 s" }, { "step": "ruling", "text": "Vijayā Daśamī, Zunyi, 1980: Sunday 19 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": "1980-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-19", "confidence": "determinate" } ], "quote": "In Zunyi, Vijayā Daśamī (Dussehra) 1980 falls on Sunday 19 October. Daśamī touches Śravaṇa in the day time on neither day, so madhyāhna decides. Daśamī runs from 22:50 on Sat 18 Oct to 21:15 on Sun 19 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-10-20", "festival": "ekadashi", "name": "Pāśāṅkuśā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34835, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-10-19T21:14:57+08:00", "utc": "1980-10-19T13:14:57Z", "ms": 340809297157.7681 }, "end": { "local": "1980-10-20T18:56:17+08:00", "utc": "1980-10-20T10:56:17Z", "ms": 340887377054.70746 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-19T21:14:57+08:00", "utc": "1980-10-19T13:14:57Z", "ms": 340809297157.7681 }, "end": { "local": "1980-10-20T18:56:17+08:00", "utc": "1980-10-20T10:56:17Z", "ms": 340887377054.70746 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-10-20", "window": { "start": { "local": "1980-10-20T06:55:32+08:00", "utc": "1980-10-19T22:55:32Z", "ms": 340844132279.7761 }, "end": { "local": "1980-10-20T06:55:32+08:00", "utc": "1980-10-19T22:55:32Z", "ms": 340844132279.7761 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-10-21", "window": { "start": { "local": "1980-10-21T06:56:09+08:00", "utc": "1980-10-20T22:56:09Z", "ms": 340930568633.50354 }, "end": { "local": "1980-10-21T06:56:09+08:00", "utc": "1980-10-20T22:56:09Z", "ms": 340930568633.50354 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:15 on Sun 19 Oct to 18:56 on Mon 20 Oct.", "fact": "1980-10-19T13:14:57Z → 1980-10-20T10:56:17Z" }, { "step": "kaala", "text": "Sunrise is at 06:56 on the 20th and 06:56 on the 21st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 20th and is not on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 34835 s" }, { "step": "ruling", "text": "Pāśāṅkuśā Ekādaśī, Zunyi, 1980: Monday 20 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": "1980-10-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-20", "confidence": "determinate" } ], "quote": "In Zunyi, Pāśāṅkuśā Ekādaśī 1980 falls on Monday 20 October. Ekādaśī runs from 21:15 on Sun 19 Oct to 18:56 on Mon 20 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-10-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-10-21", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8262, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-10-21T15:59:53+08:00", "utc": "1980-10-21T07:59:53Z", "ms": 340963192554.9122 }, "end": { "local": "1980-10-22T12:33:40+08:00", "utc": "1980-10-22T04:33:40Z", "ms": 341037220461.9815 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1980-10-21T15:59:53+08:00", "utc": "1980-10-21T07:59:53Z", "ms": 340963192554.9122 }, "end": { "local": "1980-10-22T12:33:40+08:00", "utc": "1980-10-22T04:33:40Z", "ms": 341037220461.9815 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-10-21", "window": { "start": { "local": "1980-10-21T18:17:35+08:00", "utc": "1980-10-21T10:17:35Z", "ms": 340971454513.86633 }, "end": { "local": "1980-10-21T19:58:48+08:00", "utc": "1980-10-21T11:58:48Z", "ms": 340977527965.0783 } }, "covered_min": 101, "window_min": 101, "qualifies": true }, { "local_date": "1980-10-22", "window": { "start": { "local": "1980-10-22T18:16:39+08:00", "utc": "1980-10-22T10:16:39Z", "ms": 341057799204.03894 }, "end": { "local": "1980-10-22T19:58:05+08:00", "utc": "1980-10-22T11:58:05Z", "ms": 341063884987.6669 } }, "covered_min": 0, "window_min": 101, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 16:00 on Tue 21 Oct to 12:34 on Wed 22 Oct.", "fact": "1980-10-21T07:59:53Z → 1980-10-22T04:33:40Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:18–19:59 on the 21st, 18:17–19:58 on the 22nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 101 of 101 minutes on the 21st and 0 of 101 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8262 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Tuesday 21 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": "1980-10-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-21", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Tuesday 21 October. Trayodaśī runs from 16:00 on Tue 21 Oct to 12:34 on Wed 22 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-10-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/karaka-chaturthi", "festival": "karaka-chaturthi", "name": "Karaka Caturthī", "everyday": "Karwa Chauth", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8991, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-10-26T18:05:40+08:00", "utc": "1980-10-26T10:05:40Z", "ms": 341402740360.5211 }, "end": { "local": "1980-10-27T15:27:35+08:00", "utc": "1980-10-27T07:27:35Z", "ms": 341479654575.923 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-10-26T18:05:40+08:00", "utc": "1980-10-26T10:05:40Z", "ms": 341402740360.5211 }, "end": { "local": "1980-10-27T15:27:35+08:00", "utc": "1980-10-27T07:27:35Z", "ms": 341479654575.923 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-10-26", "window": { "start": { "local": "1980-10-26T20:35:32+08:00", "utc": "1980-10-26T12:35:32Z", "ms": 341411731620.18665 }, "end": { "local": "1980-10-26T20:35:32+08:00", "utc": "1980-10-26T12:35:32Z", "ms": 341411731620.18665 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-10-27", "window": { "start": { "local": "1980-10-27T21:29:05+08:00", "utc": "1980-10-27T13:29:05Z", "ms": 341501344951.5895 }, "end": { "local": "1980-10-27T21:29:05+08:00", "utc": "1980-10-27T13:29:05Z", "ms": 341501344951.5895 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:06 on Sun 26 Oct to 15:28 on Mon 27 Oct.", "fact": "1980-10-26T10:05:40Z → 1980-10-27T07:27:35Z" }, { "step": "kaala", "text": "Moonrise is at 20:36 on the 26th and 21:29 on the 27th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 26th and is not on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 8991 s" }, { "step": "ruling", "text": "Karaka Caturthī, Zunyi, 1980: Sunday 26 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": "1980-10-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-26", "confidence": "determinate" } ], "quote": "In Zunyi, Karaka Caturthī (Karwa Chauth) 1980 falls on Sunday 26 October. Caturthī runs from 18:06 on Sun 26 Oct to 15:28 on Mon 27 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-10-26", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8991, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-10-26T18:05:40+08:00", "utc": "1980-10-26T10:05:40Z", "ms": 341402740360.5211 }, "end": { "local": "1980-10-27T15:27:35+08:00", "utc": "1980-10-27T07:27:35Z", "ms": 341479654575.923 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-10-26T18:05:40+08:00", "utc": "1980-10-26T10:05:40Z", "ms": 341402740360.5211 }, "end": { "local": "1980-10-27T15:27:35+08:00", "utc": "1980-10-27T07:27:35Z", "ms": 341479654575.923 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-10-26", "window": { "start": { "local": "1980-10-26T20:35:32+08:00", "utc": "1980-10-26T12:35:32Z", "ms": 341411731620.18665 }, "end": { "local": "1980-10-26T20:35:32+08:00", "utc": "1980-10-26T12:35:32Z", "ms": 341411731620.18665 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-10-27", "window": { "start": { "local": "1980-10-27T21:29:05+08:00", "utc": "1980-10-27T13:29:05Z", "ms": 341501344951.5895 }, "end": { "local": "1980-10-27T21:29:05+08:00", "utc": "1980-10-27T13:29:05Z", "ms": 341501344951.5895 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:06 on Sun 26 Oct to 15:28 on Mon 27 Oct.", "fact": "1980-10-26T10:05:40Z → 1980-10-27T07:27:35Z" }, { "step": "kaala", "text": "Moonrise is at 20:36 on the 26th and 21:29 on the 27th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 26th and is not on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8991 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Sunday 26 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": "1980-10-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-26", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Sunday 26 October. Caturthī runs from 18:06 on Sun 26 Oct to 15:28 on Mon 27 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-10-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ahoyi-ashtami", "festival": "ahoyi-ashtami", "name": "Ahoyī Aṣṭamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-10-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 43086, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-10-30T12:19:07+08:00", "utc": "1980-10-30T04:19:07Z", "ms": 341727547178.166 }, "end": { "local": "1980-10-31T12:58:30+08:00", "utc": "1980-10-31T04:58:30Z", "ms": 341816309671.7041 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-10-30T12:19:07+08:00", "utc": "1980-10-30T04:19:07Z", "ms": 341727547178.166 }, "end": { "local": "1980-10-31T12:58:30+08:00", "utc": "1980-10-31T04:58:30Z", "ms": 341816309671.7041 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-10-30", "window": { "start": { "local": "1980-10-31T00:17:14+08:00", "utc": "1980-10-30T16:17:14Z", "ms": 341770633616.11945 }, "end": { "local": "1980-10-31T00:17:14+08:00", "utc": "1980-10-30T16:17:14Z", "ms": 341770633616.11945 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1980-10-31", "window": { "start": { "local": "1980-11-01T01:12:20+08:00", "utc": "1980-10-31T17:12:20Z", "ms": 341860339569.3138 }, "end": { "local": "1980-11-01T01:12:20+08:00", "utc": "1980-10-31T17:12:20Z", "ms": 341860339569.3138 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 12:19 on Thu 30 Oct to 12:58 on Fri 31 Oct.", "fact": "1980-10-30T04:19:07Z → 1980-10-31T04:58:30Z" }, { "step": "kaala", "text": "Moonrise is at 00:17 on the 30th and 01:12 on the 31st.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī 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. 104" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 43086 s" }, { "step": "ruling", "text": "Ahoyī Aṣṭamī, Zunyi, 1980: Thursday 30 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ahoyi-ashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Ahoyi astami (Gujerat) (current at moonrise), Karastami (Maharashtra). If occurs on two successive days, it is to be observed on the second day." } ], "kaala": "moonrise", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1980-10-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-10-30", "confidence": "determinate" } ], "quote": "In Zunyi, Ahoyī Aṣṭamī 1980 falls on Thursday 30 October. Aṣṭamī runs from 12:19 on Thu 30 Oct to 12:58 on Fri 31 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-11-03", "festival": "ekadashi", "name": "Ramā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33385, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-11-02T16:20:23+08:00", "utc": "1980-11-02T08:20:23Z", "ms": 342001223382.6768 }, "end": { "local": "1980-11-03T18:41:54+08:00", "utc": "1980-11-03T10:41:54Z", "ms": 342096114275.67395 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-02T16:20:23+08:00", "utc": "1980-11-02T08:20:23Z", "ms": 342001223382.6768 }, "end": { "local": "1980-11-03T18:41:54+08:00", "utc": "1980-11-03T10:41:54Z", "ms": 342096114275.67395 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-11-02", "window": { "start": { "local": "1980-11-02T07:03:59+08:00", "utc": "1980-11-01T23:03:59Z", "ms": 341967838707.9417 }, "end": { "local": "1980-11-02T07:03:59+08:00", "utc": "1980-11-01T23:03:59Z", "ms": 341967838707.9417 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-11-03", "window": { "start": { "local": "1980-11-03T07:04:41+08:00", "utc": "1980-11-02T23:04:41Z", "ms": 342054280741.1252 }, "end": { "local": "1980-11-03T07:04:41+08:00", "utc": "1980-11-02T23:04:41Z", "ms": 342054280741.1252 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:20 on Sun 2 Nov to 18:42 on Mon 3 Nov.", "fact": "1980-11-02T08:20:23Z → 1980-11-03T10:41:54Z" }, { "step": "kaala", "text": "Sunrise is at 07:04 on the 2nd and 07:05 on the 3rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 2nd and is on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33385 s" }, { "step": "ruling", "text": "Ramā Ekādaśī, Zunyi, 1980: Monday 3 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": "1980-11-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-03", "confidence": "determinate" } ], "quote": "In Zunyi, Ramā Ekādaśī 1980 falls on Monday 3 November. Ekādaśī runs from 16:20 on Sun 2 Nov to 18:42 on Mon 3 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-11-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/govatsa-dvadashi", "festival": "govatsa-dvadashi", "name": "Govatsa Dvādaśī", "everyday": "Vasu Baras", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2098, "anga": { "type": "tithi", "index": 26, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-11-03T18:41:54+08:00", "utc": "1980-11-03T10:41:54Z", "ms": 342096114275.67395 }, "end": { "local": "1980-11-04T21:15:21+08:00", "utc": "1980-11-04T13:15:21Z", "ms": 342191721407.2549 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-03T18:41:54+08:00", "utc": "1980-11-03T10:41:54Z", "ms": 342096114275.67395 }, "end": { "local": "1980-11-04T21:15:21+08:00", "utc": "1980-11-04T13:15:21Z", "ms": 342191721407.2549 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-11-03", "window": { "start": { "local": "1980-11-03T18:06:56+08:00", "utc": "1980-11-03T10:06:56Z", "ms": 342094015951.0246 }, "end": { "local": "1980-11-03T19:50:44+08:00", "utc": "1980-11-03T11:50:44Z", "ms": 342100243582.53815 } }, "covered_min": 69, "window_min": 104, "qualifies": true }, { "local_date": "1980-11-04", "window": { "start": { "local": "1980-11-04T18:06:15+08:00", "utc": "1980-11-04T10:06:15Z", "ms": 342180374890.7054 }, "end": { "local": "1980-11-04T19:50:14+08:00", "utc": "1980-11-04T11:50:14Z", "ms": 342186613709.88116 } }, "covered_min": 104, "window_min": 104, "qualifies": true } ], "decided_by": "purvaviddha", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 18:42 on Mon 3 Nov to 21:15 on Tue 4 Nov.", "fact": "1980-11-03T10:41:54Z → 1980-11-04T13:15:21Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:07–19:51 on the 3rd, 18:06–19:50 on the 4th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during pradoṣa. It covers 69 of 104 minutes on the 3rd and 104 of 104 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Both evenings qualify. Pūrvaviddhā: the first is taken.", "fact": "priority: purvaviddha → purvaviddha · margin 2098 s" }, { "step": "ruling", "text": "Govatsa Dvādaśī, Zunyi, 1980: Monday 3 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": "1980-11-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-03", "confidence": "determinate" } ], "quote": "In Zunyi, Govatsa Dvādaśī (Vasu Baras) 1980 falls on Monday 3 November. Dvādaśī runs from 18:42 on Mon 3 Nov to 21:15 on Tue 4 Nov and covers 69 of 104 minutes of pradoṣa that evening. It also reaches the next evening for 104 minutes; by the rule the first evening is taken.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/yama-dipadana", "festival": "yama-dipadana", "name": "Yama Dīpadāna", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5108, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-11-04T21:15:21+08:00", "utc": "1980-11-04T13:15:21Z", "ms": 342191721407.2549 }, "end": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-04T21:15:21+08:00", "utc": "1980-11-04T13:15:21Z", "ms": 342191721407.2549 }, "end": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-11-04", "window": { "start": { "local": "1980-11-04T18:06:15+08:00", "utc": "1980-11-04T10:06:15Z", "ms": 342180374890.7054 }, "end": { "local": "1980-11-04T19:50:14+08:00", "utc": "1980-11-04T11:50:14Z", "ms": 342186613709.88116 } }, "covered_min": 0, "window_min": 104, "qualifies": false }, { "local_date": "1980-11-05", "window": { "start": { "local": "1980-11-05T18:05:35+08:00", "utc": "1980-11-05T10:05:35Z", "ms": 342266735104.6469 }, "end": { "local": "1980-11-05T19:49:45+08:00", "utc": "1980-11-05T11:49:45Z", "ms": 342272984993.2124 } }, "covered_min": 104, "window_min": 104, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 21:15 on Tue 4 Nov to 23:51 on Wed 5 Nov.", "fact": "1980-11-04T13:15:21Z → 1980-11-05T15:51:04Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:06–19:50 on the 4th, 18:06–19:50 on the 5th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 104 minutes on the 4th and 104 of 104 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5108 s" }, { "step": "ruling", "text": "Yama Dīpadāna, Zunyi, 1980: Wednesday 5 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": "1980-11-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-05", "confidence": "determinate" } ], "quote": "In Zunyi, Yama Dīpadāna 1980 falls on Wednesday 5 November. Trayodaśī runs from 21:15 on Tue 4 Nov to 23:51 on Wed 5 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-11-05", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5108, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-11-04T21:15:21+08:00", "utc": "1980-11-04T13:15:21Z", "ms": 342191721407.2549 }, "end": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-04T21:15:21+08:00", "utc": "1980-11-04T13:15:21Z", "ms": 342191721407.2549 }, "end": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-11-04", "window": { "start": { "local": "1980-11-04T18:06:15+08:00", "utc": "1980-11-04T10:06:15Z", "ms": 342180374890.7054 }, "end": { "local": "1980-11-04T19:50:14+08:00", "utc": "1980-11-04T11:50:14Z", "ms": 342186613709.88116 } }, "covered_min": 0, "window_min": 104, "qualifies": false }, { "local_date": "1980-11-05", "window": { "start": { "local": "1980-11-05T18:05:35+08:00", "utc": "1980-11-05T10:05:35Z", "ms": 342266735104.6469 }, "end": { "local": "1980-11-05T19:49:45+08:00", "utc": "1980-11-05T11:49:45Z", "ms": 342272984993.2124 } }, "covered_min": 104, "window_min": 104, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 21:15 on Tue 4 Nov to 23:51 on Wed 5 Nov.", "fact": "1980-11-04T13:15:21Z → 1980-11-05T15:51:04Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:06–19:50 on the 4th, 18:06–19:50 on the 5th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 104 minutes on the 4th and 104 of 104 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5108 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Wednesday 5 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": "1980-11-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-05", "confidence": "determinate" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Wednesday 5 November. Trayodaśī runs from 21:15 on Tue 4 Nov to 23:51 on Wed 5 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-11-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-11-05", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-05", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 1268, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 }, "end": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 }, "end": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 } }, "kaala": "nishita", "days": [ { "local_date": "1980-11-05", "window": { "start": { "local": "1980-11-06T00:12:12+08:00", "utc": "1980-11-05T16:12:12Z", "ms": 342288732186.7675 }, "end": { "local": "1980-11-06T01:00:12+08:00", "utc": "1980-11-05T17:00:12Z", "ms": 342291612186.7675 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-06", "window": { "start": { "local": "1980-11-07T00:12:15+08:00", "utc": "1980-11-06T16:12:15Z", "ms": 342375134744.7464 }, "end": { "local": "1980-11-07T01:00:15+08:00", "utc": "1980-11-06T17:00:15Z", "ms": 342378014744.7464 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:51 on Wed 5 Nov to 02:22 on Fri 7 Nov.", "fact": "1980-11-05T15:51:04Z → 1980-11-06T18:21:45Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:12–01:00 on the 5th, 00:12–01:00 on the 6th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 5th and 48 of 48 on the 6th.", "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 1268 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Wednesday 5 November.", "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": "1980-11-05", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-06", "confidence": "boundary" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Wednesday 5 November. Caturdaśī runs from 23:51 on Wed 5 Nov to 02:22 on Fri 7 Nov 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/zunyi/festivals/1980/shivaratri?on=1980-11-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/naraka-chaturdashi", "festival": "naraka-chaturdashi", "name": "Naraka Caturdaśī", "everyday": "Choti Diwali", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10887, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 }, "end": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-05T23:51:04+08:00", "utc": "1980-11-05T15:51:04Z", "ms": 342287463802.45636 }, "end": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 } }, "kaala": "arunodaya", "days": [ { "local_date": "1980-11-06", "window": { "start": { "local": "1980-11-06T05:22:39+08:00", "utc": "1980-11-05T21:22:39Z", "ms": 342307359380.32263 }, "end": { "local": "1980-11-06T07:06:49+08:00", "utc": "1980-11-05T23:06:49Z", "ms": 342313609268.8881 } }, "covered_min": 104, "window_min": 104, "qualifies": true }, { "local_date": "1980-11-07", "window": { "start": { "local": "1980-11-07T05:23:12+08:00", "utc": "1980-11-06T21:23:12Z", "ms": 342393792040.4721 }, "end": { "local": "1980-11-07T07:07:33+08:00", "utc": "1980-11-06T23:07:33Z", "ms": 342400052875.28143 } }, "covered_min": 0, "window_min": 104, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:51 on Wed 5 Nov to 02:22 on Fri 7 Nov.", "fact": "1980-11-05T15:51:04Z → 1980-11-06T18:21:45Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:23–07:07 on the 6th, 05:23–07:08 on the 7th.", "fact": "arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during aruṇodaya. It covers 104 of 104 minutes on the 6th and 0 of 104 on the 7th.", "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 10887 s" }, { "step": "ruling", "text": "Naraka Caturdaśī, Zunyi, 1980: Thursday 6 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": "1980-11-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-06", "confidence": "determinate" } ], "quote": "In Zunyi, Naraka Caturdaśī (Choti Diwali) 1980 falls on Thursday 6 November. Caturdaśī runs from 23:51 on Wed 5 Nov to 02:22 on Fri 7 Nov and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/diwali-lakshmi-puja", "festival": "diwali-lakshmi-puja", "name": "Lakṣmī Pūjā", "everyday": "Diwali", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23548, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 }, "end": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 }, "end": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-11-06", "window": { "start": { "local": "1980-11-06T18:04:57+08:00", "utc": "1980-11-06T10:04:57Z", "ms": 342353096614.21136 }, "end": { "local": "1980-11-06T19:49:17+08:00", "utc": "1980-11-06T11:49:17Z", "ms": 342359357449.0207 } }, "covered_min": 0, "window_min": 104, "qualifies": false }, { "local_date": "1980-11-07", "window": { "start": { "local": "1980-11-07T18:04:19+08:00", "utc": "1980-11-07T10:04:19Z", "ms": 342439459440.02856 }, "end": { "local": "1980-11-07T19:48:51+08:00", "utc": "1980-11-07T11:48:51Z", "ms": 342445731092.9622 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 02:22 on Fri 7 Nov to 04:43 on Sat 8 Nov.", "fact": "1980-11-06T18:21:45Z → 1980-11-07T20:42:32Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:05–19:49 on the 6th, 18:04–19:49 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during pradoṣa. It covers 0 of 104 minutes on the 6th and 105 of 105 on the 7th.", "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 23548 s" }, { "step": "ruling", "text": "Lakṣmī Pūjā, Zunyi, 1980: Friday 7 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": "1980-11-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-07", "confidence": "determinate" } ], "quote": "In Zunyi, Lakṣmī Pūjā (Diwali) 1980 falls on Friday 7 November. Amāvasyā runs from 02:22 on Fri 7 Nov to 04:43 on Sat 8 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/kali-puja", "festival": "kali-puja", "name": "Kālī Pūjā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4891, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 }, "end": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-07T02:21:45+08:00", "utc": "1980-11-06T18:21:45Z", "ms": 342382905273.72797 }, "end": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 } }, "kaala": "nishita", "days": [ { "local_date": "1980-11-06", "window": { "start": { "local": "1980-11-07T00:12:15+08:00", "utc": "1980-11-06T16:12:15Z", "ms": 342375134744.7464 }, "end": { "local": "1980-11-07T01:00:15+08:00", "utc": "1980-11-06T17:00:15Z", "ms": 342378014744.7464 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-11-07", "window": { "start": { "local": "1980-11-08T00:12:18+08:00", "utc": "1980-11-07T16:12:18Z", "ms": 342461538138.5299 }, "end": { "local": "1980-11-08T01:00:18+08:00", "utc": "1980-11-07T17:00:18Z", "ms": 342464418138.5299 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 02:22 on Fri 7 Nov to 04:43 on Sat 8 Nov.", "fact": "1980-11-06T18:21:45Z → 1980-11-07T20:42:32Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:12–01:00 on the 6th, 00:12–01:00 on the 7th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during niśītha. It covers 0 of 48 minutes on the 6th and 48 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 4891 s" }, { "step": "ruling", "text": "Kālī Pūjā, Zunyi, 1980: Friday 7 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": "1980-11-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-07", "confidence": "determinate" } ], "quote": "In Zunyi, Kālī Pūjā 1980 falls on Friday 7 November. Amāvasyā runs from 02:22 on Fri 7 Nov to 04:43 on Sat 8 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/govardhana-puja", "festival": "govardhana-puja", "name": "Govardhana Pūjā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19314, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "end": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "end": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-08", "window": { "start": { "local": "1980-11-08T12:12:00+08:00", "utc": "1980-11-08T04:12:00Z", "ms": 342504720219.5216 }, "end": { "local": "1980-11-08T13:00:00+08:00", "utc": "1980-11-08T05:00:00Z", "ms": 342507600219.5216 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-09", "window": { "start": { "local": "1980-11-09T12:12:05+08:00", "utc": "1980-11-09T04:12:05Z", "ms": 342591125127.7008 }, "end": { "local": "1980-11-09T13:00:05+08:00", "utc": "1980-11-09T05:00:05Z", "ms": 342594005127.7008 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov.", "fact": "1980-11-07T20:42:32Z → 1980-11-08T22:50:11Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:12–13:00 on the 8th, 12:12–13:00 on the 9th.", "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 8th and 0 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 19314 s" }, { "step": "ruling", "text": "Govardhana Pūjā, Zunyi, 1980: Saturday 8 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": "1980-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-08", "confidence": "determinate" } ], "quote": "In Zunyi, Govardhana Pūjā 1980 falls on Saturday 8 November. Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/bali-puja", "festival": "bali-puja", "name": "Bali Pūjā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32021, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "end": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "end": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-11-07", "window": { "start": { "local": "1980-11-07T18:04:19+08:00", "utc": "1980-11-07T10:04:19Z", "ms": 342439459440.02856 }, "end": { "local": "1980-11-07T19:48:51+08:00", "utc": "1980-11-07T11:48:51Z", "ms": 342445731092.9622 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1980-11-08", "window": { "start": { "local": "1980-11-08T18:03:44+08:00", "utc": "1980-11-08T10:03:44Z", "ms": 342525823602.0121 }, "end": { "local": "1980-11-08T19:48:26+08:00", "utc": "1980-11-08T11:48:26Z", "ms": 342532105939.8789 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov.", "fact": "1980-11-07T20:42:32Z → 1980-11-08T22:50:11Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:04–19:49 on the 7th, 18:04–19:48 on the 8th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pradoṣa. It covers 0 of 105 minutes on the 7th and 105 of 105 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: unstated → only-day · margin 32021 s" }, { "step": "ruling", "text": "Bali Pūjā, Zunyi, 1980: Saturday 8 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": "1980-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-08", "confidence": "determinate" } ], "quote": "In Zunyi, Bali Pūjā 1980 falls on Saturday 8 November. Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/dyuta-pratipad", "festival": "dyuta-pratipad", "name": "Dyūta Pratipad", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1130, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "end": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-08T04:42:32+08:00", "utc": "1980-11-07T20:42:32Z", "ms": 342477751675.205 }, "end": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 } }, "kaala": "purvahna", "days": [ { "local_date": "1980-11-08", "window": { "start": { "local": "1980-11-08T07:08:17+08:00", "utc": "1980-11-07T23:08:17Z", "ms": 342486496837.0312 }, "end": { "local": "1980-11-08T10:46:46+08:00", "utc": "1980-11-08T02:46:46Z", "ms": 342499605758.69147 } }, "covered_min": 218, "window_min": 218, "qualifies": true }, { "local_date": "1980-11-09", "window": { "start": { "local": "1980-11-09T07:09:01+08:00", "utc": "1980-11-08T23:09:01Z", "ms": 342572941136.0132 }, "end": { "local": "1980-11-09T10:47:04+08:00", "utc": "1980-11-09T02:47:04Z", "ms": 342586023797.13824 } }, "covered_min": 0, "window_min": 218, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov.", "fact": "1980-11-07T20:42:32Z → 1980-11-08T22:50:11Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 07:08–10:47 on the 8th, 07:09–10:47 on the 9th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pūrvāhṇa. It covers 218 of 218 minutes on the 8th and 0 of 218 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one forenoon qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1130 s" }, { "step": "ruling", "text": "Dyūta Pratipad, Zunyi, 1980: Saturday 8 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": "1980-11-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-08", "confidence": "determinate" } ], "quote": "In Zunyi, Dyūta Pratipad 1980 falls on Saturday 8 November. Pratipadā runs from 04:43 on Sat 8 Nov to 06:50 on Sun 9 Nov and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/yama-dvitiya", "festival": "yama-dvitiya", "name": "Yama Dvitīyā", "everyday": "Bhai Dooj", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12596, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 }, "end": { "local": "1980-11-10T08:42:15+08:00", "utc": "1980-11-10T00:42:15Z", "ms": 342664934897.88477 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-09T06:50:11+08:00", "utc": "1980-11-08T22:50:11Z", "ms": 342571810779.9059 }, "end": { "local": "1980-11-10T08:42:15+08:00", "utc": "1980-11-10T00:42:15Z", "ms": 342664934897.88477 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-09", "window": { "start": { "local": "1980-11-09T12:12:05+08:00", "utc": "1980-11-09T04:12:05Z", "ms": 342591125127.7008 }, "end": { "local": "1980-11-09T13:00:05+08:00", "utc": "1980-11-09T05:00:05Z", "ms": 342594005127.7008 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-10", "window": { "start": { "local": "1980-11-10T12:12:11+08:00", "utc": "1980-11-10T04:12:11Z", "ms": 342677530881.7243 }, "end": { "local": "1980-11-10T13:00:11+08:00", "utc": "1980-11-10T05:00:11Z", "ms": 342680410881.7243 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 06:50 on Sun 9 Nov to 08:42 on Mon 10 Nov.", "fact": "1980-11-08T22:50:11Z → 1980-11-10T00:42:15Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:12–13:00 on the 9th, 12:12–13:00 on the 10th.", "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 9th and 0 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 12596 s" }, { "step": "ruling", "text": "Yama Dvitīyā, Zunyi, 1980: Sunday 9 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": "1980-11-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-09", "confidence": "determinate" } ], "quote": "In Zunyi, Yama Dvitīyā (Bhai Dooj) 1980 falls on Sunday 9 November. Dvitīyā runs from 06:50 on Sun 9 Nov to 08:42 on Mon 10 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/naga-chaturthi", "festival": "naga-chaturthi", "name": "Nāga Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2645, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-11-11T10:16:06+08:00", "utc": "1980-11-11T02:16:06Z", "ms": 342756966087.80054 }, "end": { "local": "1980-11-12T11:28:20+08:00", "utc": "1980-11-12T03:28:20Z", "ms": 342847699976.27484 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-11T10:16:06+08:00", "utc": "1980-11-11T02:16:06Z", "ms": 342756966087.80054 }, "end": { "local": "1980-11-12T11:28:20+08:00", "utc": "1980-11-12T03:28:20Z", "ms": 342847699976.27484 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-11", "window": { "start": { "local": "1980-11-11T12:12:17+08:00", "utc": "1980-11-11T04:12:17Z", "ms": 342763937480.17175 }, "end": { "local": "1980-11-11T13:00:17+08:00", "utc": "1980-11-11T05:00:17Z", "ms": 342766817480.17175 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-12", "window": { "start": { "local": "1980-11-12T12:12:25+08:00", "utc": "1980-11-12T04:12:25Z", "ms": 342850344920.75464 }, "end": { "local": "1980-11-12T13:00:25+08:00", "utc": "1980-11-12T05:00:25Z", "ms": 342853224920.75464 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:16 on Tue 11 Nov to 11:28 on Wed 12 Nov.", "fact": "1980-11-11T02:16:06Z → 1980-11-12T03:28:20Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:12–13:00 on the 11th, 12:12–13:00 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 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: paraviddha → only-day · margin 2645 s" }, { "step": "ruling", "text": "Nāga Caturthī, Zunyi, 1980: Tuesday 11 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": "1980-11-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-11", "confidence": "boundary" } ], "quote": "In Zunyi, Nāga Caturthī 1980 falls on Tuesday 11 November. Caturthī runs from 10:16 on Tue 11 Nov to 11:28 on Wed 12 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-11-11", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2645, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-11-11T10:16:06+08:00", "utc": "1980-11-11T02:16:06Z", "ms": 342756966087.80054 }, "end": { "local": "1980-11-12T11:28:20+08:00", "utc": "1980-11-12T03:28:20Z", "ms": 342847699976.27484 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-11T10:16:06+08:00", "utc": "1980-11-11T02:16:06Z", "ms": 342756966087.80054 }, "end": { "local": "1980-11-12T11:28:20+08:00", "utc": "1980-11-12T03:28:20Z", "ms": 342847699976.27484 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-11", "window": { "start": { "local": "1980-11-11T12:12:17+08:00", "utc": "1980-11-11T04:12:17Z", "ms": 342763937480.17175 }, "end": { "local": "1980-11-11T13:00:17+08:00", "utc": "1980-11-11T05:00:17Z", "ms": 342766817480.17175 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-12", "window": { "start": { "local": "1980-11-12T12:12:25+08:00", "utc": "1980-11-12T04:12:25Z", "ms": 342850344920.75464 }, "end": { "local": "1980-11-12T13:00:25+08:00", "utc": "1980-11-12T05:00:25Z", "ms": 342853224920.75464 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:16 on Tue 11 Nov to 11:28 on Wed 12 Nov.", "fact": "1980-11-11T02:16:06Z → 1980-11-12T03:28:20Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:12–13:00 on the 11th, 12:12–13:00 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 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 midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 2645 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Tuesday 11 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": "1980-11-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-11", "confidence": "boundary" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Tuesday 11 November. Caturthī runs from 10:16 on Tue 11 Nov to 11:28 on Wed 12 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-11-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/surya-shashthi", "festival": "surya-shashthi", "name": "Sūrya Ṣaṣṭhī", "everyday": "Chhath", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-13", "confidence": "boundary", "boundary_reasons": [ "margin", "tie-break-unstated" ], "boundary_margin_s": 125, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-11-13T12:14:39+08:00", "utc": "1980-11-13T04:14:39Z", "ms": 342936878661.13184 }, "end": { "local": "1980-11-14T12:30:15+08:00", "utc": "1980-11-14T04:30:15Z", "ms": 343024215488.3899 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-13T12:14:39+08:00", "utc": "1980-11-13T04:14:39Z", "ms": 342936878661.13184 }, "end": { "local": "1980-11-14T12:30:15+08:00", "utc": "1980-11-14T04:30:15Z", "ms": 343024215488.3899 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-13", "window": { "start": { "local": "1980-11-13T12:12:33+08:00", "utc": "1980-11-13T04:12:33Z", "ms": 342936753200.41797 }, "end": { "local": "1980-11-13T13:00:33+08:00", "utc": "1980-11-13T05:00:33Z", "ms": 342939633200.41797 } }, "covered_min": 46, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-14", "window": { "start": { "local": "1980-11-14T12:12:42+08:00", "utc": "1980-11-14T04:12:42Z", "ms": 343023162315.4581 }, "end": { "local": "1980-11-14T13:00:42+08:00", "utc": "1980-11-14T05:00:42Z", "ms": 343026042315.4581 } }, "covered_min": 18, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 12:15 on Thu 13 Nov to 12:30 on Fri 14 Nov.", "fact": "1980-11-13T04:14:39Z → 1980-11-14T04:30:15Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 13th, 12:13–13:01 on the 14th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 46 of 48 minutes on the 13th and 18 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 125 s < 300 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī, Zunyi, 1980: Thursday 13 November.", "fact": "confidence: boundary (margin, tie-break-unstated)" } ], "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": "1980-11-13", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-13", "confidence": "boundary" } ], "quote": "In Zunyi, Sūrya Ṣaṣṭhī (Chhath) 1980 falls on Thursday 13 November. Ṣaṣṭhī runs from 12:15 on Thu 13 Nov to 12:30 on Fri 14 Nov and covers 46 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 18 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 2 min 05 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/gopashtami", "festival": "gopashtami", "name": "Gopāṣṭamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-15", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 127, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1980-11-15T12:10:45+08:00", "utc": "1980-11-15T04:10:45Z", "ms": 343109444817.9929 }, "end": { "local": "1980-11-16T11:13:01+08:00", "utc": "1980-11-16T03:13:01Z", "ms": 343192381289.85535 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-15T12:10:45+08:00", "utc": "1980-11-15T04:10:45Z", "ms": 343109444817.9929 }, "end": { "local": "1980-11-16T11:13:01+08:00", "utc": "1980-11-16T03:13:01Z", "ms": 343192381289.85535 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-15", "window": { "start": { "local": "1980-11-15T12:12:52+08:00", "utc": "1980-11-15T04:12:52Z", "ms": 343109572261.6631 }, "end": { "local": "1980-11-15T13:00:52+08:00", "utc": "1980-11-15T05:00:52Z", "ms": 343112452261.6631 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-16", "window": { "start": { "local": "1980-11-16T12:13:03+08:00", "utc": "1980-11-16T04:13:03Z", "ms": 343195983034.48145 }, "end": { "local": "1980-11-16T13:01:03+08:00", "utc": "1980-11-16T05:01:03Z", "ms": 343198863034.48145 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 12:11 on Sat 15 Nov to 11:13 on Sun 16 Nov.", "fact": "1980-11-15T04:10:45Z → 1980-11-16T03:13:01Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 15th, 12:13–13:01 on the 16th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 15th and 0 of 48 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 127 s < 300 s" }, { "step": "ruling", "text": "Gopāṣṭamī, Zunyi, 1980: Saturday 15 November.", "fact": "confidence: boundary (margin)" } ], "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": "1980-11-15", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-15", "confidence": "determinate" } ], "quote": "In Zunyi, Gopāṣṭamī 1980 falls on Saturday 15 November. Aṣṭamī runs from 12:11 on Sat 15 Nov to 11:13 on Sun 16 Nov and covers all of madhyāhna that midday. It is 2 min 07 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/durga-navami", "festival": "durga-navami", "name": "Durgā Navamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3602, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1980-11-16T11:13:01+08:00", "utc": "1980-11-16T03:13:01Z", "ms": 343192381289.85535 }, "end": { "local": "1980-11-17T09:36:10+08:00", "utc": "1980-11-17T01:36:10Z", "ms": 343272970264.5726 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-16T11:13:01+08:00", "utc": "1980-11-16T03:13:01Z", "ms": 343192381289.85535 }, "end": { "local": "1980-11-17T09:36:10+08:00", "utc": "1980-11-17T01:36:10Z", "ms": 343272970264.5726 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-16", "window": { "start": { "local": "1980-11-16T12:13:03+08:00", "utc": "1980-11-16T04:13:03Z", "ms": 343195983034.48145 }, "end": { "local": "1980-11-16T13:01:03+08:00", "utc": "1980-11-16T05:01:03Z", "ms": 343198863034.48145 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-17", "window": { "start": { "local": "1980-11-17T12:13:15+08:00", "utc": "1980-11-17T04:13:15Z", "ms": 343282394629.2168 }, "end": { "local": "1980-11-17T13:01:15+08:00", "utc": "1980-11-17T05:01:15Z", "ms": 343285274629.2168 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 11:13 on Sun 16 Nov to 09:36 on Mon 17 Nov.", "fact": "1980-11-16T03:13:01Z → 1980-11-17T01:36:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 16th, 12:13–13:01 on the 17th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 16th and 0 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 3602 s" }, { "step": "ruling", "text": "Durgā Navamī, Zunyi, 1980: Sunday 16 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": "1980-11-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-16", "confidence": "determinate" } ], "quote": "In Zunyi, Durgā Navamī 1980 falls on Sunday 16 November. Navamī runs from 11:13 on Sun 16 Nov to 09:36 on Mon 17 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/akshaya-navami", "festival": "akshaya-navami", "name": "Akṣaya Navamī", "everyday": "Amla Navami", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1413, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1980-11-16T11:13:01+08:00", "utc": "1980-11-16T03:13:01Z", "ms": 343192381289.85535 }, "end": { "local": "1980-11-17T09:36:10+08:00", "utc": "1980-11-17T01:36:10Z", "ms": 343272970264.5726 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-16T11:13:01+08:00", "utc": "1980-11-16T03:13:01Z", "ms": 343192381289.85535 }, "end": { "local": "1980-11-17T09:36:10+08:00", "utc": "1980-11-17T01:36:10Z", "ms": 343272970264.5726 } }, "kaala": "purvahna", "days": [ { "local_date": "1980-11-16", "window": { "start": { "local": "1980-11-16T07:14:19+08:00", "utc": "1980-11-15T23:14:19Z", "ms": 343178058878.63776 }, "end": { "local": "1980-11-16T10:49:28+08:00", "utc": "1980-11-16T02:49:28Z", "ms": 343190968315.8669 } }, "covered_min": 0, "window_min": 215, "qualifies": false }, { "local_date": "1980-11-17", "window": { "start": { "local": "1980-11-17T07:15:05+08:00", "utc": "1980-11-16T23:15:05Z", "ms": 343264505077.07477 }, "end": { "local": "1980-11-17T10:49:51+08:00", "utc": "1980-11-17T02:49:51Z", "ms": 343277391445.16943 } }, "covered_min": 141, "window_min": 215, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 11:13 on Sun 16 Nov to 09:36 on Mon 17 Nov.", "fact": "1980-11-16T03:13:01Z → 1980-11-17T01:36:10Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 07:14–10:49 on the 16th, 07:15–10:50 on the 17th.", "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 215 minutes on the 16th and 141 of 215 on the 17th.", "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 1413 s" }, { "step": "ruling", "text": "Akṣaya Navamī, Zunyi, 1980: Monday 17 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": "1980-11-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-17", "confidence": "determinate" } ], "quote": "In Zunyi, Akṣaya Navamī (Amla Navami) 1980 falls on Monday 17 November. Navamī runs from 11:13 on Sun 16 Nov to 09:36 on Mon 17 Nov and covers 141 of 215 minutes of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-11-18", "festival": "ekadashi", "name": "Prabodhinī Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 365, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-11-18T07:21:56+08:00", "utc": "1980-11-17T23:21:56Z", "ms": 343351316137.24194 }, "end": { "local": "1980-11-19T04:34:45+08:00", "utc": "1980-11-18T20:34:45Z", "ms": 343427685038.9486 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-18T07:21:56+08:00", "utc": "1980-11-17T23:21:56Z", "ms": 343351316137.24194 }, "end": { "local": "1980-11-19T04:34:45+08:00", "utc": "1980-11-18T20:34:45Z", "ms": 343427685038.9486 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-11-18", "window": { "start": { "local": "1980-11-18T07:15:51+08:00", "utc": "1980-11-17T23:15:51Z", "ms": 343350951401.4368 }, "end": { "local": "1980-11-18T07:15:51+08:00", "utc": "1980-11-17T23:15:51Z", "ms": 343350951401.4368 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-11-19", "window": { "start": { "local": "1980-11-19T07:16:38+08:00", "utc": "1980-11-18T23:16:38Z", "ms": 343437397826.60614 }, "end": { "local": "1980-11-19T07:16:38+08:00", "utc": "1980-11-18T23:16:38Z", "ms": 343437397826.60614 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 07:22 on Tue 18 Nov to 04:35 on Wed 19 Nov.", "fact": "1980-11-17T23:21:56Z → 1980-11-18T20:34:45Z" }, { "step": "kaala", "text": "Sunrise is at 07:16 on the 18th and 07:17 on the 19th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 18th and is not on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Neither sunrise qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 365 s" }, { "step": "ruling", "text": "Prabodhinī Ekādaśī, Zunyi, 1980: Tuesday 18 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": "1980-11-18", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-18", "confidence": "determinate" } ], "quote": "In Zunyi, Prabodhinī Ekādaśī 1980 falls on Tuesday 18 November. Ekādaśī runs from 07:22 on Tue 18 Nov to 04:35 on Wed 19 Nov, and is current at sunrise on neither day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-11-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-11-20", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7546, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-11-20T01:21:27+08:00", "utc": "1980-11-19T17:21:27Z", "ms": 343502487211.1504 }, "end": { "local": "1980-11-20T21:50:48+08:00", "utc": "1980-11-20T13:50:48Z", "ms": 343576248122.83093 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-20T01:21:27+08:00", "utc": "1980-11-19T17:21:27Z", "ms": 343502487211.1504 }, "end": { "local": "1980-11-20T21:50:48+08:00", "utc": "1980-11-20T13:50:48Z", "ms": 343576248122.83093 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-11-19", "window": { "start": { "local": "1980-11-19T17:58:43+08:00", "utc": "1980-11-19T09:58:43Z", "ms": 343475922705.4848 }, "end": { "local": "1980-11-19T19:45:12+08:00", "utc": "1980-11-19T11:45:12Z", "ms": 343482312255.1601 } }, "covered_min": 0, "window_min": 106, "qualifies": false }, { "local_date": "1980-11-20", "window": { "start": { "local": "1980-11-20T17:58:24+08:00", "utc": "1980-11-20T09:58:24Z", "ms": 343562304270.8465 }, "end": { "local": "1980-11-20T19:45:02+08:00", "utc": "1980-11-20T11:45:02Z", "ms": 343568702485.6275 } }, "covered_min": 107, "window_min": 107, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:21 on Thu 20 Nov to 21:51 on Thu 20 Nov.", "fact": "1980-11-19T17:21:27Z → 1980-11-20T13:50:48Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:59–19:45 on the 19th, 17:58–19:45 on the 20th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 106 minutes on the 19th and 107 of 107 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 7546 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Thursday 20 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": "1980-11-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-20", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Thursday 20 November. Trayodaśī runs from 01:21 on Thu 20 Nov to 21:51 on Thu 20 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-11-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/rasayatra", "festival": "rasayatra", "name": "Rāsayātrā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21696, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-11-21T18:12:56+08:00", "utc": "1980-11-21T10:12:56Z", "ms": 343649576183.1584 }, "end": { "local": "1980-11-22T14:38:51+08:00", "utc": "1980-11-22T06:38:51Z", "ms": 343723131058.0938 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-21T18:12:56+08:00", "utc": "1980-11-21T10:12:56Z", "ms": 343649576183.1584 }, "end": { "local": "1980-11-22T14:38:51+08:00", "utc": "1980-11-22T06:38:51Z", "ms": 343723131058.0938 } }, "kaala": "nishita", "days": [ { "local_date": "1980-11-21", "window": { "start": { "local": "1980-11-22T00:14:32+08:00", "utc": "1980-11-21T16:14:32Z", "ms": 343671272428.16724 }, "end": { "local": "1980-11-22T01:02:32+08:00", "utc": "1980-11-21T17:02:32Z", "ms": 343674152428.16724 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-11-22", "window": { "start": { "local": "1980-11-23T00:14:48+08:00", "utc": "1980-11-22T16:14:48Z", "ms": 343757688067.6399 }, "end": { "local": "1980-11-23T01:02:48+08:00", "utc": "1980-11-22T17:02:48Z", "ms": 343760568067.6399 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 18:13 on Fri 21 Nov to 14:39 on Sat 22 Nov.", "fact": "1980-11-21T10:12:56Z → 1980-11-22T06:38:51Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:15–01:03 on the 21st, 00:15–01:03 on the 22nd.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during niśītha. It covers 48 of 48 minutes on the 21st and 0 of 48 on the 22nd.", "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 21696 s" }, { "step": "ruling", "text": "Rāsayātrā, Zunyi, 1980: Friday 21 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": "1980-11-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-21", "confidence": "determinate" } ], "quote": "In Zunyi, Rāsayātrā 1980 falls on Friday 21 November. Pūrṇimā runs from 18:13 on Fri 21 Nov to 14:39 on Sat 22 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/kartiki-purnima", "festival": "kartiki-purnima", "name": "Kārtikī Pūrṇimā", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5786, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-11-21T18:12:56+08:00", "utc": "1980-11-21T10:12:56Z", "ms": 343649576183.1584 }, "end": { "local": "1980-11-22T14:38:51+08:00", "utc": "1980-11-22T06:38:51Z", "ms": 343723131058.0938 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1980-11-21T18:12:56+08:00", "utc": "1980-11-21T10:12:56Z", "ms": 343649576183.1584 }, "end": { "local": "1980-11-22T14:38:51+08:00", "utc": "1980-11-22T06:38:51Z", "ms": 343723131058.0938 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-11-21", "window": { "start": { "local": "1980-11-21T12:14:09+08:00", "utc": "1980-11-21T04:14:09Z", "ms": 343628049137.2501 }, "end": { "local": "1980-11-21T13:02:09+08:00", "utc": "1980-11-21T05:02:09Z", "ms": 343630929137.2501 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-11-22", "window": { "start": { "local": "1980-11-22T12:14:25+08:00", "utc": "1980-11-22T04:14:25Z", "ms": 343714464774.97314 }, "end": { "local": "1980-11-22T13:02:25+08:00", "utc": "1980-11-22T05:02:25Z", "ms": 343717344774.97314 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 18:13 on Fri 21 Nov to 14:39 on Sat 22 Nov.", "fact": "1980-11-21T10:12:56Z → 1980-11-22T06:38:51Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:14–13:02 on the 21st, 12:14–13:02 on the 22nd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 0 of 48 minutes on the 21st and 48 of 48 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5786 s" }, { "step": "ruling", "text": "Kārtikī Pūrṇimā, Zunyi, 1980: Saturday 22 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": "1980-11-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-22", "confidence": "determinate" } ], "quote": "In Zunyi, Kārtikī Pūrṇimā 1980 falls on Saturday 22 November. Pūrṇimā runs from 18:13 on Fri 21 Nov to 14:39 on Sat 22 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-11-25", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-11-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27183, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-11-25T06:10:46+08:00", "utc": "1980-11-24T22:10:46Z", "ms": 343951845923.5693 }, "end": { "local": "1980-11-26T04:39:17+08:00", "utc": "1980-11-25T20:39:17Z", "ms": 344032757264.2234 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-11-25T06:10:46+08:00", "utc": "1980-11-24T22:10:46Z", "ms": 343951845923.5693 }, "end": { "local": "1980-11-26T04:39:17+08:00", "utc": "1980-11-25T20:39:17Z", "ms": 344032757264.2234 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-11-24", "window": { "start": { "local": "1980-11-24T20:08:11+08:00", "utc": "1980-11-24T12:08:11Z", "ms": 343915691376.2883 }, "end": { "local": "1980-11-24T20:08:11+08:00", "utc": "1980-11-24T12:08:11Z", "ms": 343915691376.2883 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-11-25", "window": { "start": { "local": "1980-11-25T21:06:14+08:00", "utc": "1980-11-25T13:06:14Z", "ms": 344005573867.8113 }, "end": { "local": "1980-11-25T21:06:14+08:00", "utc": "1980-11-25T13:06:14Z", "ms": 344005573867.8113 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 06:11 on Tue 25 Nov to 04:39 on Wed 26 Nov.", "fact": "1980-11-24T22:10:46Z → 1980-11-25T20:39:17Z" }, { "step": "kaala", "text": "Moonrise is at 20:08 on the 24th and 21:06 on the 25th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 24th and is on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 27183 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Tuesday 25 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": "1980-11-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-11-25", "confidence": "determinate" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Tuesday 25 November. Caturthī runs from 06:11 on Tue 25 Nov to 04:39 on Wed 26 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-11-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/ekadashi?on=1980-12-03", "festival": "ekadashi", "name": "Utpannā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15381, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-12-02T11:43:00+08:00", "utc": "1980-12-02T03:43:00Z", "ms": 344576579879.9952 }, "end": { "local": "1980-12-03T14:20:21+08:00", "utc": "1980-12-03T06:20:21Z", "ms": 344672420810.9168 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-02T11:43:00+08:00", "utc": "1980-12-02T03:43:00Z", "ms": 344576579879.9952 }, "end": { "local": "1980-12-03T14:20:21+08:00", "utc": "1980-12-03T06:20:21Z", "ms": 344672420810.9168 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-12-02", "window": { "start": { "local": "1980-12-02T07:26:39+08:00", "utc": "1980-12-01T23:26:39Z", "ms": 344561198511.7491 }, "end": { "local": "1980-12-02T07:26:39+08:00", "utc": "1980-12-01T23:26:39Z", "ms": 344561198511.7491 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-12-03", "window": { "start": { "local": "1980-12-03T07:27:23+08:00", "utc": "1980-12-02T23:27:23Z", "ms": 344647643374.8977 }, "end": { "local": "1980-12-03T07:27:23+08:00", "utc": "1980-12-02T23:27:23Z", "ms": 344647643374.8977 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:43 on Tue 2 Dec to 14:20 on Wed 3 Dec.", "fact": "1980-12-02T03:43:00Z → 1980-12-03T06:20:21Z" }, { "step": "kaala", "text": "Sunrise is at 07:27 on the 2nd and 07:27 on the 3rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 2nd and is on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 15381 s" }, { "step": "ruling", "text": "Utpannā Ekādaśī, Zunyi, 1980: Wednesday 3 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": "1980-12-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-03", "confidence": "determinate" } ], "quote": "In Zunyi, Utpannā Ekādaśī 1980 falls on Wednesday 3 December. Ekādaśī runs from 11:43 on Tue 2 Dec to 14:20 on Wed 3 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-12-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/pradosha-vrata?on=1980-12-04", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-04", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 2340, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-12-04T16:50:52+08:00", "utc": "1980-12-04T08:50:52Z", "ms": 344767852168.5697 }, "end": { "local": "1980-12-05T19:06:21+08:00", "utc": "1980-12-05T11:06:21Z", "ms": 344862380755.5448 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-04T16:50:52+08:00", "utc": "1980-12-04T08:50:52Z", "ms": 344767852168.5697 }, "end": { "local": "1980-12-05T19:06:21+08:00", "utc": "1980-12-05T11:06:21Z", "ms": 344862380755.5448 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-12-04", "window": { "start": { "local": "1980-12-04T17:56:54+08:00", "utc": "1980-12-04T09:56:54Z", "ms": 344771814367.3084 }, "end": { "local": "1980-12-04T19:45:10+08:00", "utc": "1980-12-04T11:45:10Z", "ms": 344778310038.7927 } }, "covered_min": 108, "window_min": 108, "qualifies": true }, { "local_date": "1980-12-05", "window": { "start": { "local": "1980-12-05T17:57:00+08:00", "utc": "1980-12-05T09:57:00Z", "ms": 344858220105.0323 }, "end": { "local": "1980-12-05T19:45:21+08:00", "utc": "1980-12-05T11:45:21Z", "ms": 344864720821.844 } }, "covered_min": 69, "window_min": 108, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 16:51 on Thu 4 Dec to 19:06 on Fri 5 Dec.", "fact": "1980-12-04T08:50:52Z → 1980-12-05T11:06:21Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:57–19:45 on the 4th, 17:57–19:45 on the 5th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 108 of 108 minutes on the 4th and 69 of 108 on the 5th.", "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 2340 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Zunyi, 1980: Thursday 4 December.", "fact": "confidence: boundary (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": "1980-12-04", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-04", "confidence": "boundary" } ], "quote": "In Zunyi, Kṛṣṇa Pradoṣa Vrata 1980 falls on Thursday 4 December. Trayodaśī runs from 16:51 on Thu 4 Dec to 19:06 on Fri 5 Dec and covers all of pradoṣa that evening. It also reaches the next evening for 69 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/zunyi/festivals/1980/pradosha-vrata?on=1980-12-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/shivaratri?on=1980-12-05", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11873, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1980-12-05T19:06:21+08:00", "utc": "1980-12-05T11:06:21Z", "ms": 344862380755.5448 }, "end": { "local": "1980-12-06T21:01:50+08:00", "utc": "1980-12-06T13:01:50Z", "ms": 344955709623.0124 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-05T19:06:21+08:00", "utc": "1980-12-05T11:06:21Z", "ms": 344862380755.5448 }, "end": { "local": "1980-12-06T21:01:50+08:00", "utc": "1980-12-06T13:01:50Z", "ms": 344955709623.0124 } }, "kaala": "nishita", "days": [ { "local_date": "1980-12-05", "window": { "start": { "local": "1980-12-06T00:19:18+08:00", "utc": "1980-12-05T16:19:18Z", "ms": 344881157793.0762 }, "end": { "local": "1980-12-06T01:07:18+08:00", "utc": "1980-12-05T17:07:18Z", "ms": 344884037793.0762 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-12-06", "window": { "start": { "local": "1980-12-07T00:19:43+08:00", "utc": "1980-12-06T16:19:43Z", "ms": 344967582989.05743 }, "end": { "local": "1980-12-07T01:07:43+08:00", "utc": "1980-12-06T17:07:43Z", "ms": 344970462989.05743 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 19:06 on Fri 5 Dec to 21:02 on Sat 6 Dec.", "fact": "1980-12-05T11:06:21Z → 1980-12-06T13:01:50Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:19–01:07 on the 5th, 00:20–01:08 on the 6th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 5th and 0 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11873 s" }, { "step": "ruling", "text": "Śivarātri, Zunyi, 1980: Friday 5 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": "1980-12-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-05", "confidence": "determinate" } ], "quote": "In Zunyi, Śivarātri 1980 falls on Friday 5 December. Caturdaśī runs from 19:06 on Fri 5 Dec to 21:02 on Sat 6 Dec and covers all of niśītha that night.", "cite": "https://ahargana.org/zunyi/festivals/1980/shivaratri?on=1980-12-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-12-11", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 40926, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-12-11T00:58:08+08:00", "utc": "1980-12-10T16:58:08Z", "ms": 345315488450.3106 }, "end": { "local": "1980-12-12T00:59:58+08:00", "utc": "1980-12-11T16:59:58Z", "ms": 345401998149.9781 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-11T00:58:08+08:00", "utc": "1980-12-10T16:58:08Z", "ms": 345315488450.3106 }, "end": { "local": "1980-12-12T00:59:58+08:00", "utc": "1980-12-11T16:59:58Z", "ms": 345401998149.9781 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-12-11", "window": { "start": { "local": "1980-12-11T12:21:36+08:00", "utc": "1980-12-11T04:21:36Z", "ms": 345356496074.8895 }, "end": { "local": "1980-12-11T13:09:36+08:00", "utc": "1980-12-11T05:09:36Z", "ms": 345359376074.8895 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-12-12", "window": { "start": { "local": "1980-12-12T12:22:04+08:00", "utc": "1980-12-12T04:22:04Z", "ms": 345442924237.4407 }, "end": { "local": "1980-12-12T13:10:04+08:00", "utc": "1980-12-12T05:10:04Z", "ms": 345445804237.4407 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 00:58 on Thu 11 Dec to 01:00 on Fri 12 Dec.", "fact": "1980-12-10T16:58:08Z → 1980-12-11T16:59:58Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:22–13:10 on the 11th, 12:22–13:10 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 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 midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 40926 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Zunyi, 1980: Thursday 11 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": "1980-12-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-11", "confidence": "determinate" } ], "quote": "In Zunyi, Vināyaka Caturthī 1980 falls on Thursday 11 December. Caturthī runs from 00:58 on Thu 11 Dec to 01:00 on Fri 12 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/vinayaka-chaturthi?on=1980-12-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/naga-panchami-margashirsha", "festival": "naga-panchami-margashirsha", "name": "Nāga Pañcamī (Mārgaśīrṣa)", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 40926, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1980-12-12T00:59:58+08:00", "utc": "1980-12-11T16:59:58Z", "ms": 345401998149.9781 }, "end": { "local": "1980-12-13T00:37:29+08:00", "utc": "1980-12-12T16:37:29Z", "ms": 345487049259.8473 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-12T00:59:58+08:00", "utc": "1980-12-11T16:59:58Z", "ms": 345401998149.9781 }, "end": { "local": "1980-12-13T00:37:29+08:00", "utc": "1980-12-12T16:37:29Z", "ms": 345487049259.8473 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-12-12", "window": { "start": { "local": "1980-12-12T12:22:04+08:00", "utc": "1980-12-12T04:22:04Z", "ms": 345442924237.4407 }, "end": { "local": "1980-12-12T13:10:04+08:00", "utc": "1980-12-12T05:10:04Z", "ms": 345445804237.4407 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1980-12-13", "window": { "start": { "local": "1980-12-13T12:22:33+08:00", "utc": "1980-12-13T04:22:33Z", "ms": 345529352733.75476 }, "end": { "local": "1980-12-13T13:10:33+08:00", "utc": "1980-12-13T05:10:33Z", "ms": 345532232733.75476 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 01:00 on Fri 12 Dec to 00:37 on Sat 13 Dec.", "fact": "1980-12-11T16:59:58Z → 1980-12-12T16:37:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:22–13:10 on the 12th, 12:23–13:11 on the 13th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 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: paraviddha → only-day · margin 40926 s" }, { "step": "ruling", "text": "Nāga Pañcamī (Mārgaśīrṣa), Zunyi, 1980: Friday 12 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": "1980-12-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-12", "confidence": "determinate" } ], "quote": "In Zunyi, Nāga Pañcamī (Mārgaśīrṣa) 1980 falls on Friday 12 December. Pañcamī runs from 01:00 on Fri 12 Dec to 00:37 on Sat 13 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/champa-shashthi", "festival": "champa-shashthi", "name": "Campā Ṣaṣṭhī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38326, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-12-13T00:37:29+08:00", "utc": "1980-12-12T16:37:29Z", "ms": 345487049259.8473 }, "end": { "local": "1980-12-13T23:49:19+08:00", "utc": "1980-12-13T15:49:19Z", "ms": 345570559179.1764 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-13T00:37:29+08:00", "utc": "1980-12-12T16:37:29Z", "ms": 345487049259.8473 }, "end": { "local": "1980-12-13T23:49:19+08:00", "utc": "1980-12-13T15:49:19Z", "ms": 345570559179.1764 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-12-12", "window": { "start": { "local": "1980-12-12T12:22:04+08:00", "utc": "1980-12-12T04:22:04Z", "ms": 345442924237.4407 }, "end": { "local": "1980-12-12T13:10:04+08:00", "utc": "1980-12-12T05:10:04Z", "ms": 345445804237.4407 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-12-13", "window": { "start": { "local": "1980-12-13T12:22:33+08:00", "utc": "1980-12-13T04:22:33Z", "ms": 345529352733.75476 }, "end": { "local": "1980-12-13T13:10:33+08:00", "utc": "1980-12-13T05:10:33Z", "ms": 345532232733.75476 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 00:37 on Sat 13 Dec to 23:49 on Sat 13 Dec.", "fact": "1980-12-12T16:37:29Z → 1980-12-13T15:49:19Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:22–13:10 on the 12th, 12:23–13:11 on the 13th.", "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 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 38326 s" }, { "step": "ruling", "text": "Campā Ṣaṣṭhī, Zunyi, 1980: Saturday 13 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": "1980-12-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-13", "confidence": "determinate" } ], "quote": "In Zunyi, Campā Ṣaṣṭhī 1980 falls on Saturday 13 December. Ṣaṣṭhī runs from 00:37 on Sat 13 Dec to 23:49 on Sat 13 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/skanda-shashthi", "festival": "skanda-shashthi", "name": "Skanda Ṣaṣṭhī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38326, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1980-12-13T00:37:29+08:00", "utc": "1980-12-12T16:37:29Z", "ms": 345487049259.8473 }, "end": { "local": "1980-12-13T23:49:19+08:00", "utc": "1980-12-13T15:49:19Z", "ms": 345570559179.1764 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-13T00:37:29+08:00", "utc": "1980-12-12T16:37:29Z", "ms": 345487049259.8473 }, "end": { "local": "1980-12-13T23:49:19+08:00", "utc": "1980-12-13T15:49:19Z", "ms": 345570559179.1764 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-12-12", "window": { "start": { "local": "1980-12-12T12:22:04+08:00", "utc": "1980-12-12T04:22:04Z", "ms": 345442924237.4407 }, "end": { "local": "1980-12-12T13:10:04+08:00", "utc": "1980-12-12T05:10:04Z", "ms": 345445804237.4407 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-12-13", "window": { "start": { "local": "1980-12-13T12:22:33+08:00", "utc": "1980-12-13T04:22:33Z", "ms": 345529352733.75476 }, "end": { "local": "1980-12-13T13:10:33+08:00", "utc": "1980-12-13T05:10:33Z", "ms": 345532232733.75476 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 00:37 on Sat 13 Dec to 23:49 on Sat 13 Dec.", "fact": "1980-12-12T16:37:29Z → 1980-12-13T15:49:19Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:22–13:10 on the 12th, 12:23–13:11 on the 13th.", "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 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: purvaviddha → only-day · margin 38326 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī, Zunyi, 1980: Saturday 13 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": "1980-12-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-13", "confidence": "determinate" } ], "quote": "In Zunyi, Skanda Ṣaṣṭhī 1980 falls on Saturday 13 December. Ṣaṣṭhī runs from 00:37 on Sat 13 Dec to 23:49 on Sat 13 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/mitra-saptami", "festival": "mitra-saptami", "name": "Mitra Saptamī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33803, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1980-12-13T23:49:19+08:00", "utc": "1980-12-13T15:49:19Z", "ms": 345570559179.1764 }, "end": { "local": "1980-12-14T22:34:25+08:00", "utc": "1980-12-14T14:34:25Z", "ms": 345652464770.2034 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-13T23:49:19+08:00", "utc": "1980-12-13T15:49:19Z", "ms": 345570559179.1764 }, "end": { "local": "1980-12-14T22:34:25+08:00", "utc": "1980-12-14T14:34:25Z", "ms": 345652464770.2034 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-12-13", "window": { "start": { "local": "1980-12-13T12:22:33+08:00", "utc": "1980-12-13T04:22:33Z", "ms": 345529352733.75476 }, "end": { "local": "1980-12-13T13:10:33+08:00", "utc": "1980-12-13T05:10:33Z", "ms": 345532232733.75476 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-12-14", "window": { "start": { "local": "1980-12-14T12:23:02+08:00", "utc": "1980-12-14T04:23:02Z", "ms": 345615781529.4629 }, "end": { "local": "1980-12-14T13:11:02+08:00", "utc": "1980-12-14T05:11:02Z", "ms": 345618661529.4629 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 23:49 on Sat 13 Dec to 22:34 on Sun 14 Dec.", "fact": "1980-12-13T15:49:19Z → 1980-12-14T14:34:25Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:23–13:11 on the 13th, 12:23–13:11 on the 14th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 13th and 48 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 33803 s" }, { "step": "ruling", "text": "Mitra Saptamī, Zunyi, 1980: Sunday 14 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": "1980-12-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-14", "confidence": "determinate" } ], "quote": "In Zunyi, Mitra Saptamī 1980 falls on Sunday 14 December. Saptamī runs from 23:49 on Sat 13 Dec to 22:34 on Sun 14 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/ekadashi?on=1980-12-18", "festival": "ekadashi", "name": "Mokṣadā Ekādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21165, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1980-12-17T16:16:23+08:00", "utc": "1980-12-17T08:16:23Z", "ms": 345888983136.4353 }, "end": { "local": "1980-12-18T13:30:10+08:00", "utc": "1980-12-18T05:30:10Z", "ms": 345965409677.8375 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-17T16:16:23+08:00", "utc": "1980-12-17T08:16:23Z", "ms": 345888983136.4353 }, "end": { "local": "1980-12-18T13:30:10+08:00", "utc": "1980-12-18T05:30:10Z", "ms": 345965409677.8375 } }, "kaala": "sunrise", "days": [ { "local_date": "1980-12-17", "window": { "start": { "local": "1980-12-17T07:36:51+08:00", "utc": "1980-12-16T23:36:51Z", "ms": 345857810557.20734 }, "end": { "local": "1980-12-17T07:36:51+08:00", "utc": "1980-12-16T23:36:51Z", "ms": 345857810557.20734 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-12-18", "window": { "start": { "local": "1980-12-18T07:37:25+08:00", "utc": "1980-12-17T23:37:25Z", "ms": 345944244923.8456 }, "end": { "local": "1980-12-18T07:37:25+08:00", "utc": "1980-12-17T23:37:25Z", "ms": 345944244923.8456 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:16 on Wed 17 Dec to 13:30 on Thu 18 Dec.", "fact": "1980-12-17T08:16:23Z → 1980-12-18T05:30:10Z" }, { "step": "kaala", "text": "Sunrise is at 07:37 on the 17th and 07:37 on the 18th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 17th and is on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 21165 s" }, { "step": "ruling", "text": "Mokṣadā Ekādaśī, Zunyi, 1980: Thursday 18 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": "1980-12-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-18", "confidence": "determinate" } ], "quote": "In Zunyi, Mokṣadā Ekādaśī 1980 falls on Thursday 18 December. Ekādaśī runs from 16:16 on Wed 17 Dec to 13:30 on Thu 18 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/zunyi/festivals/1980/ekadashi?on=1980-12-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/akhanda-dvadashi", "festival": "akhanda-dvadashi", "name": "Akhaṇḍa Dvādaśī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1031, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1980-12-18T13:30:10+08:00", "utc": "1980-12-18T05:30:10Z", "ms": 345965409677.8375 }, "end": { "local": "1980-12-19T10:33:42+08:00", "utc": "1980-12-19T02:33:42Z", "ms": 346041221695.1441 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-18T13:30:10+08:00", "utc": "1980-12-18T05:30:10Z", "ms": 345965409677.8375 }, "end": { "local": "1980-12-19T10:33:42+08:00", "utc": "1980-12-19T02:33:42Z", "ms": 346041221695.1441 } }, "kaala": "madhyahna", "days": [ { "local_date": "1980-12-18", "window": { "start": { "local": "1980-12-18T12:24:59+08:00", "utc": "1980-12-18T04:24:59Z", "ms": 345961499035.168 }, "end": { "local": "1980-12-18T13:12:59+08:00", "utc": "1980-12-18T05:12:59Z", "ms": 345964379035.168 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1980-12-19", "window": { "start": { "local": "1980-12-19T12:25:29+08:00", "utc": "1980-12-19T04:25:29Z", "ms": 346047928831.4169 }, "end": { "local": "1980-12-19T13:13:29+08:00", "utc": "1980-12-19T05:13:29Z", "ms": 346050808831.4169 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 13:30 on Thu 18 Dec to 10:34 on Fri 19 Dec.", "fact": "1980-12-18T05:30:10Z → 1980-12-19T02:33:42Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 18th, 12:25–13:13 on the 19th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 18th and 0 of 48 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: paraviddha → second-day · margin 1031 s" }, { "step": "ruling", "text": "Akhaṇḍa Dvādaśī, Zunyi, 1980: Friday 19 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": "1980-12-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-18", "confidence": "determinate" } ], "quote": "In Zunyi, Akhaṇḍa Dvādaśī 1980 falls on Friday 19 December. Dvādaśī runs from 13:30 on Thu 18 Dec to 10:34 on Fri 19 Dec, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/pradosha-vrata?on=1980-12-19", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26838, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1980-12-19T10:33:42+08:00", "utc": "1980-12-19T02:33:42Z", "ms": 346041221695.1441 }, "end": { "local": "1980-12-20T07:35:05+08:00", "utc": "1980-12-19T23:35:05Z", "ms": 346116905385.1378 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-19T10:33:42+08:00", "utc": "1980-12-19T02:33:42Z", "ms": 346041221695.1441 }, "end": { "local": "1980-12-20T07:35:05+08:00", "utc": "1980-12-19T23:35:05Z", "ms": 346116905385.1378 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-12-19", "window": { "start": { "local": "1980-12-19T18:00:59+08:00", "utc": "1980-12-19T10:00:59Z", "ms": 346068059410.5825 }, "end": { "local": "1980-12-19T19:50:00+08:00", "utc": "1980-12-19T11:50:00Z", "ms": 346074599557.0738 } }, "covered_min": 109, "window_min": 109, "qualifies": true }, { "local_date": "1980-12-20", "window": { "start": { "local": "1980-12-20T18:01:27+08:00", "utc": "1980-12-20T10:01:27Z", "ms": 346154486959.45917 }, "end": { "local": "1980-12-20T19:50:28+08:00", "utc": "1980-12-20T11:50:28Z", "ms": 346161027586.66223 } }, "covered_min": 0, "window_min": 109, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 10:34 on Fri 19 Dec to 07:35 on Sat 20 Dec.", "fact": "1980-12-19T02:33:42Z → 1980-12-19T23:35:05Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:01–19:50 on the 19th, 18:01–19:50 on the 20th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 109 of 109 minutes on the 19th and 0 of 109 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 26838 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Zunyi, 1980: Friday 19 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": "1980-12-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-19", "confidence": "determinate" } ], "quote": "In Zunyi, Śukla Pradoṣa Vrata 1980 falls on Friday 19 December. Trayodaśī runs from 10:34 on Fri 19 Dec to 07:35 on Sat 20 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/pradosha-vrata?on=1980-12-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/zunyi/festivals/1980/dattatreyotpatti", "festival": "dattatreyotpatti", "name": "Dattātreyotpatti", "everyday": "Datta Jayanti", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22624, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1980-12-21T04:43:22+08:00", "utc": "1980-12-20T20:43:22Z", "ms": 346193002135.94055 }, "end": { "local": "1980-12-22T02:08:00+08:00", "utc": "1980-12-21T18:08:00Z", "ms": 346270080227.51855 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-21T04:43:22+08:00", "utc": "1980-12-20T20:43:22Z", "ms": 346193002135.94055 }, "end": { "local": "1980-12-22T02:08:00+08:00", "utc": "1980-12-21T18:08:00Z", "ms": 346270080227.51855 } }, "kaala": "pradosha", "days": [ { "local_date": "1980-12-20", "window": { "start": { "local": "1980-12-20T18:01:27+08:00", "utc": "1980-12-20T10:01:27Z", "ms": 346154486959.45917 }, "end": { "local": "1980-12-20T19:50:28+08:00", "utc": "1980-12-20T11:50:28Z", "ms": 346161027586.66223 } }, "covered_min": 0, "window_min": 109, "qualifies": false }, { "local_date": "1980-12-21", "window": { "start": { "local": "1980-12-21T18:01:56+08:00", "utc": "1980-12-21T10:01:56Z", "ms": 346240915765.7609 }, "end": { "local": "1980-12-21T19:50:57+08:00", "utc": "1980-12-21T11:50:57Z", "ms": 346247456554.95807 } }, "covered_min": 109, "window_min": 109, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 04:43 on Sun 21 Dec to 02:08 on Mon 22 Dec.", "fact": "1980-12-20T20:43:22Z → 1980-12-21T18:08:00Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:01–19:50 on the 20th, 18:02–19:51 on the 21st.", "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 109 minutes on the 20th and 109 of 109 on the 21st.", "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 22624 s" }, { "step": "ruling", "text": "Dattātreyotpatti, Zunyi, 1980: Sunday 21 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": "1980-12-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-21", "confidence": "determinate" } ], "quote": "In Zunyi, Dattātreyotpatti (Datta Jayanti) 1980 falls on Sunday 21 December. Pūrṇimā runs from 04:43 on Sun 21 Dec to 02:08 on Mon 22 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/zunyi/festivals/1980/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": "/zunyi/festivals/1980/sankashta-chaturthi?on=1980-12-24", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1783621", "year": 1980, "local_date": "1980-12-24", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 1380, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1980-12-24T21:29:13+08:00", "utc": "1980-12-24T13:29:13Z", "ms": 346512553093.9368 }, "end": { "local": "1980-12-25T21:21:19+08:00", "utc": "1980-12-25T13:21:19Z", "ms": 346598479032.2077 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1980-12-24T21:29:13+08:00", "utc": "1980-12-24T13:29:13Z", "ms": 346512553093.9368 }, "end": { "local": "1980-12-25T21:21:19+08:00", "utc": "1980-12-25T13:21:19Z", "ms": 346598479032.2077 } }, "kaala": "moonrise", "days": [ { "local_date": "1980-12-24", "window": { "start": { "local": "1980-12-24T20:46:10+08:00", "utc": "1980-12-24T12:46:10Z", "ms": 346509970142.8066 }, "end": { "local": "1980-12-24T20:46:10+08:00", "utc": "1980-12-24T12:46:10Z", "ms": 346509970142.8066 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1980-12-25", "window": { "start": { "local": "1980-12-25T21:44:19+08:00", "utc": "1980-12-25T13:44:19Z", "ms": 346599858612.0334 }, "end": { "local": "1980-12-25T21:44:19+08:00", "utc": "1980-12-25T13:44:19Z", "ms": 346599858612.0334 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:29 on Wed 24 Dec to 21:21 on Thu 25 Dec.", "fact": "1980-12-24T13:29:13Z → 1980-12-25T13:21:19Z" }, { "step": "kaala", "text": "Moonrise is at 20:46 on the 24th and 21:44 on the 25th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 24th and is not on the 25th.", "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 1380 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Zunyi, 1980: Wednesday 24 December.", "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": "1980-12-24", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1980-12-24", "confidence": "boundary" } ], "quote": "In Zunyi, Saṅkaṣṭa Caturthī 1980 falls on Wednesday 24 December. Caturthī runs from 21:29 on Wed 24 Dec to 21:21 on Thu 25 Dec, and is current at moonrise on neither day.", "cite": "https://ahargana.org/zunyi/festivals/1980/sankashta-chaturthi?on=1980-12-24", "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" } }