{ "id": "/chengdu/festivals/1963", "place": { "id": "1815286", "slug": "chengdu", "name": "Chengdu", "region": "Sichuan, China", "country": "CN", "lat": 30.66667, "lon": 104.06667, "elevation_m": 499, "tz": "Asia/Shanghai" }, "year": 1963, "tradition": "smarta", "method": "pac-rp@2026.1", "ruleset": "2026.3-draft", "rulings": [ { "id": "/chengdu/festivals/1963/ekadashi?on=1963-01-06", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19416, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-01-05T15:34:42+08:00", "utc": "1963-01-05T07:34:42Z", "ms": -220551918202.79712 }, "end": { "local": "1963-01-06T13:25:54+08:00", "utc": "1963-01-06T05:25:54Z", "ms": -220473245701.04218 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-01-05T15:34:42+08:00", "utc": "1963-01-05T07:34:42Z", "ms": -220551918202.79712 }, "end": { "local": "1963-01-06T13:25:54+08:00", "utc": "1963-01-06T05:25:54Z", "ms": -220473245701.04218 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-01-05", "window": { "start": { "local": "1963-01-05T08:02:10+08:00", "utc": "1963-01-05T00:02:10Z", "ms": -220579070110.2087 }, "end": { "local": "1963-01-05T08:02:10+08:00", "utc": "1963-01-05T00:02:10Z", "ms": -220579070110.2087 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-01-06", "window": { "start": { "local": "1963-01-06T08:02:18+08:00", "utc": "1963-01-06T00:02:18Z", "ms": -220492661773.08292 }, "end": { "local": "1963-01-06T08:02:18+08:00", "utc": "1963-01-06T00:02:18Z", "ms": -220492661773.08292 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 15:35 on Sat 5 Jan to 13:26 on Sun 6 Jan.", "fact": "1963-01-05T07:34:42Z → 1963-01-06T05:25:54Z" }, { "step": "kaala", "text": "Sunrise is at 08:02 on the 5th and 08:02 on the 6th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 5th and is on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 19416 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Chengdu, 1963: Sunday 6 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": "1963-01-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-06", "confidence": "determinate" } ], "quote": "In Chengdu, Putradā Ekādaśī 1963 falls on Sunday 6 January. Ekādaśī runs from 15:35 on Sat 5 Jan to 13:26 on Sun 6 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-01-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-01-07", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24719, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-01-07T11:25:10+08:00", "utc": "1963-01-07T03:25:10Z", "ms": -220394089669.4662 }, "end": { "local": "1963-01-08T09:38:01+08:00", "utc": "1963-01-08T01:38:01Z", "ms": -220314118874.0296 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-01-07T11:25:10+08:00", "utc": "1963-01-07T03:25:10Z", "ms": -220394089669.4662 }, "end": { "local": "1963-01-08T09:38:01+08:00", "utc": "1963-01-08T01:38:01Z", "ms": -220314118874.0296 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-01-07", "window": { "start": { "local": "1963-01-07T18:17:09+08:00", "utc": "1963-01-07T10:17:09Z", "ms": -220369370515.95978 }, "end": { "local": "1963-01-07T20:07:12+08:00", "utc": "1963-01-07T12:07:12Z", "ms": -220362767802.26013 } }, "covered_min": 110, "window_min": 110, "qualifies": true }, { "local_date": "1963-01-08", "window": { "start": { "local": "1963-01-08T18:17:57+08:00", "utc": "1963-01-08T10:17:57Z", "ms": -220282923128.0045 }, "end": { "local": "1963-01-08T20:07:54+08:00", "utc": "1963-01-08T12:07:54Z", "ms": -220276326297.7039 } }, "covered_min": 0, "window_min": 110, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:25 on Mon 7 Jan to 09:38 on Tue 8 Jan.", "fact": "1963-01-07T03:25:10Z → 1963-01-08T01:38:01Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:17–20:07 on the 7th, 18:18–20:08 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 110 of 110 minutes on the 7th and 0 of 110 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 24719 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Monday 7 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": "1963-01-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-07", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Monday 7 January. Trayodaśī runs from 11:25 on Mon 7 Jan to 09:38 on Tue 8 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-01-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/bhogi", "festival": "bhogi", "name": "Bhogi", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16321, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-02-13T02:48:22+08:00", "utc": "1963-02-12T18:48:22Z", "ms": -217228297558.52316 } }, "span": { "of": "transit", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 } }, "kaala": "sunset-day", "days": [ { "local_date": "1963-01-14", "window": { "start": { "local": "1963-01-13T18:22:03+08:00", "utc": "1963-01-13T10:22:03Z", "ms": -219850676880.80377 }, "end": { "local": "1963-01-14T18:22:54+08:00", "utc": "1963-01-14T10:22:54Z", "ms": -219764226045.54364 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1963-01-15", "window": { "start": { "local": "1963-01-14T18:22:54+08:00", "utc": "1963-01-14T10:22:54Z", "ms": -219764226045.54364 }, "end": { "local": "1963-01-15T18:23:45+08:00", "utc": "1963-01-15T10:23:45Z", "ms": -219677774773.6165 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1963-01-14", "days": -1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 13:51 on Mon 14 Jan.", "fact": "1963-01-14T05:50:52Z · 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 18:23, and the day of the 15th ends at 18:24.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 16321 s" }, { "step": "counted", "text": "Bhogi is kept the day before Pongal: Monday 14 January is the day taken above.", "fact": "follows: pongal − 1 d" }, { "step": "ruling", "text": "Bhogi, Chengdu, 1963: Sunday 13 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "bhogi", "follows": { "festival": "pongal", "days": -1 }, "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } ], "rashi": "Makara", "day_from": "sunset" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-01-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-13", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1963-01-13", "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": "1963-01-13", "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 Chengdu, Bhogi 1963 falls on Sunday 13 January. It is kept the day before Pongal, which falls on Monday 14 January. The Sun enters Makara at 13:51 on Mon 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-01-13", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38292, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-01-13T07:21:46+08:00", "utc": "1963-01-12T23:21:46Z", "ms": -219890293834.51978 }, "end": { "local": "1963-01-14T08:40:04+08:00", "utc": "1963-01-14T00:40:04Z", "ms": -219799196247.66696 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-13T07:21:46+08:00", "utc": "1963-01-12T23:21:46Z", "ms": -219890293834.51978 }, "end": { "local": "1963-01-14T08:40:04+08:00", "utc": "1963-01-14T00:40:04Z", "ms": -219799196247.66696 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-01-12", "window": { "start": { "local": "1963-01-12T20:43:34+08:00", "utc": "1963-01-12T12:43:34Z", "ms": -219928586089.57187 }, "end": { "local": "1963-01-12T20:43:34+08:00", "utc": "1963-01-12T12:43:34Z", "ms": -219928586089.57187 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-01-13", "window": { "start": { "local": "1963-01-13T21:40:16+08:00", "utc": "1963-01-13T13:40:16Z", "ms": -219838784022.26028 }, "end": { "local": "1963-01-13T21:40:16+08:00", "utc": "1963-01-13T13:40:16Z", "ms": -219838784022.26028 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 07:22 on Sun 13 Jan to 08:40 on Mon 14 Jan.", "fact": "1963-01-12T23:21:46Z → 1963-01-14T00:40:04Z" }, { "step": "kaala", "text": "Moonrise is at 20:44 on the 12th and 21:40 on the 13th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 12th and is on the 13th.", "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 38292 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Sunday 13 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-01-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-13", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Sunday 13 January. Caturthī runs from 07:22 on Sun 13 Jan to 08:40 on Mon 14 Jan and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-01-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pongal", "festival": "pongal", "name": "Pongal", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16321, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-02-13T02:48:22+08:00", "utc": "1963-02-12T18:48:22Z", "ms": -217228297558.52316 } }, "span": { "of": "transit", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 } }, "kaala": "sunset-day", "days": [ { "local_date": "1963-01-14", "window": { "start": { "local": "1963-01-13T18:22:03+08:00", "utc": "1963-01-13T10:22:03Z", "ms": -219850676880.80377 }, "end": { "local": "1963-01-14T18:22:54+08:00", "utc": "1963-01-14T10:22:54Z", "ms": -219764226045.54364 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1963-01-15", "window": { "start": { "local": "1963-01-14T18:22:54+08:00", "utc": "1963-01-14T10:22:54Z", "ms": -219764226045.54364 }, "end": { "local": "1963-01-15T18:23:45+08:00", "utc": "1963-01-15T10:23:45Z", "ms": -219677774773.6165 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 13:51 on Mon 14 Jan.", "fact": "1963-01-14T05:50:52Z · 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 18:23, and the day of the 15th ends at 18:24.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 16321 s" }, { "step": "ruling", "text": "Pongal, Chengdu, 1963: Monday 14 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "pongal", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } ], "not_evaluated": "The rule that heads the solar festivals, the day \"taken to begin from midnight\" (p. 106), is not applied to Pongal. It is kept on the first day of the month of Makara as the Tamil districts count it, a transit after sunset going to the next day (p. 244); the Rashtriya Panchang prints Pongal so.", "rashi": "Makara", "day_from": "sunset" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1963-01-14", "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": "1963-01-14", "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 Chengdu, Pongal 1963 falls on Monday 14 January. The Sun enters Makara at 13:51 on Mon 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/makara-sankranti", "festival": "makara-sankranti", "name": "Makara Saṅkrānti", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36548, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-02-13T02:48:22+08:00", "utc": "1963-02-12T18:48:22Z", "ms": -217228297558.52316 } }, "span": { "of": "transit", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 } }, "kaala": "civil-day", "days": [ { "local_date": "1963-01-14", "window": { "start": { "local": "1963-01-14T00:00:00+08:00", "utc": "1963-01-13T16:00:00Z", "ms": -219830400000 }, "end": { "local": "1963-01-15T00:00:00+08:00", "utc": "1963-01-14T16:00:00Z", "ms": -219744000000 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "1963-01-15", "window": { "start": { "local": "1963-01-15T00:00:00+08:00", "utc": "1963-01-14T16:00:00Z", "ms": -219744000000 }, "end": { "local": "1963-01-16T00:00:00+08:00", "utc": "1963-01-15T16:00:00Z", "ms": -219657600000 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 13:51 on Mon 14 Jan.", "fact": "1963-01-14T05:50:52Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from midnight to midnight, on the clock of Chengdu.", "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 36548 s" }, { "step": "ruling", "text": "Makara Saṅkrānti, Chengdu, 1963: 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": "1963-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1963-01-14", "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": "1963-01-14", "statement": "Past sunset, the next day (the Tamil rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } } ], "quote": "In Chengdu, Makara Saṅkrānti 1963 falls on Monday 14 January. The Sun enters Makara at 13:51 on Mon 14 Jan, and the rule counts the day from midnight.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/mattu-pongal", "festival": "mattu-pongal", "name": "Mattu Pongal", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16321, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-02-13T02:48:22+08:00", "utc": "1963-02-12T18:48:22Z", "ms": -217228297558.52316 } }, "span": { "of": "transit", "start": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 }, "end": { "local": "1963-01-14T13:50:52+08:00", "utc": "1963-01-14T05:50:52Z", "ms": -219780547537.6592 } }, "kaala": "sunset-day", "days": [ { "local_date": "1963-01-14", "window": { "start": { "local": "1963-01-13T18:22:03+08:00", "utc": "1963-01-13T10:22:03Z", "ms": -219850676880.80377 }, "end": { "local": "1963-01-14T18:22:54+08:00", "utc": "1963-01-14T10:22:54Z", "ms": -219764226045.54364 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1963-01-15", "window": { "start": { "local": "1963-01-14T18:22:54+08:00", "utc": "1963-01-14T10:22:54Z", "ms": -219764226045.54364 }, "end": { "local": "1963-01-15T18:23:45+08:00", "utc": "1963-01-15T10:23:45Z", "ms": -219677774773.6165 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1963-01-14", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 13:51 on Mon 14 Jan.", "fact": "1963-01-14T05:50:52Z · 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 18:23, and the day of the 15th ends at 18:24.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 16321 s" }, { "step": "counted", "text": "Mattu Pongal is kept the day after Pongal: Monday 14 January is the day taken above.", "fact": "follows: pongal + 1 d" }, { "step": "ruling", "text": "Mattu Pongal, Chengdu, 1963: Tuesday 15 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "mattu-pongal", "follows": { "festival": "pongal", "days": 1 }, "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Makaradi — Makaradi snana, Magh Bihu (Assam), Tila samkranti, Pongal (S. India), Bhogi (S. India — on the day before Pongal), Mattu Pongal (S. India — on the day after Pongal)." }, { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } ], "rashi": "Makara", "day_from": "sunset" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-15", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1963-01-15", "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": "1963-01-15", "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 Chengdu, Mattu Pongal 1963 falls on Tuesday 15 January. It is kept the day after Pongal, which falls on Monday 14 January. The Sun enters Makara at 13:51 on Mon 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-01-21", "festival": "ekadashi", "name": "Ṣaṭtilā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31740, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-01-20T21:55:46+08:00", "utc": "1963-01-20T13:55:46Z", "ms": -219233053798.39212 }, "end": { "local": "1963-01-21T23:11:41+08:00", "utc": "1963-01-21T15:11:41Z", "ms": -219142098601.7816 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-20T21:55:46+08:00", "utc": "1963-01-20T13:55:46Z", "ms": -219233053798.39212 }, "end": { "local": "1963-01-21T23:11:41+08:00", "utc": "1963-01-21T15:11:41Z", "ms": -219142098601.7816 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-01-21", "window": { "start": { "local": "1963-01-21T08:01:00+08:00", "utc": "1963-01-21T00:01:00Z", "ms": -219196739807.36194 }, "end": { "local": "1963-01-21T08:01:00+08:00", "utc": "1963-01-21T00:01:00Z", "ms": -219196739807.36194 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-01-22", "window": { "start": { "local": "1963-01-22T08:00:42+08:00", "utc": "1963-01-22T00:00:42Z", "ms": -219110358418.18155 }, "end": { "local": "1963-01-22T08:00:42+08:00", "utc": "1963-01-22T00:00:42Z", "ms": -219110358418.18155 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:56 on Sun 20 Jan to 23:12 on Mon 21 Jan.", "fact": "1963-01-20T13:55:46Z → 1963-01-21T15:11:41Z" }, { "step": "kaala", "text": "Sunrise is at 08:01 on the 21st and 08:01 on the 22nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 21st and is not on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 31740 s" }, { "step": "ruling", "text": "Ṣaṭtilā Ekādaśī, Chengdu, 1963: Monday 21 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": "1963-01-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-21", "confidence": "determinate" } ], "quote": "In Chengdu, Ṣaṭtilā Ekādaśī 1963 falls on Monday 21 January. Ekādaśī runs from 21:56 on Sun 20 Jan to 23:12 on Mon 21 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-01-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-01-23", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12260, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-01-22T23:47:48+08:00", "utc": "1963-01-22T15:47:48Z", "ms": -219053532463.14526 }, "end": { "local": "1963-01-23T23:43:00+08:00", "utc": "1963-01-23T15:43:00Z", "ms": -218967419637.04712 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-22T23:47:48+08:00", "utc": "1963-01-22T15:47:48Z", "ms": -219053532463.14526 }, "end": { "local": "1963-01-23T23:43:00+08:00", "utc": "1963-01-23T15:43:00Z", "ms": -218967419637.04712 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-01-22", "window": { "start": { "local": "1963-01-22T18:29:53+08:00", "utc": "1963-01-22T10:29:53Z", "ms": -219072606950.12497 }, "end": { "local": "1963-01-22T20:17:57+08:00", "utc": "1963-01-22T12:17:57Z", "ms": -219066123178.66208 } }, "covered_min": 0, "window_min": 108, "qualifies": false }, { "local_date": "1963-01-23", "window": { "start": { "local": "1963-01-23T18:30:46+08:00", "utc": "1963-01-23T10:30:46Z", "ms": -218986153596.53848 }, "end": { "local": "1963-01-23T20:18:40+08:00", "utc": "1963-01-23T12:18:40Z", "ms": -218979679854.95712 } }, "covered_min": 108, "window_min": 108, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 23:48 on Tue 22 Jan to 23:43 on Wed 23 Jan.", "fact": "1963-01-22T15:47:48Z → 1963-01-23T15:43:00Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:30–20:18 on the 22nd, 18:31–20:19 on the 23rd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 108 minutes on the 22nd and 108 of 108 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 12260 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Wednesday 23 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": "1963-01-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-23", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Wednesday 23 January. Trayodaśī runs from 23:48 on Tue 22 Jan to 23:43 on Wed 23 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-01-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-01-23", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4103, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-01-23T23:43:00+08:00", "utc": "1963-01-23T15:43:00Z", "ms": -218967419637.04712 }, "end": { "local": "1963-01-24T22:59:31+08:00", "utc": "1963-01-24T14:59:31Z", "ms": -218883629073.49225 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-23T23:43:00+08:00", "utc": "1963-01-23T15:43:00Z", "ms": -218967419637.04712 }, "end": { "local": "1963-01-24T22:59:31+08:00", "utc": "1963-01-24T14:59:31Z", "ms": -218883629073.49225 } }, "kaala": "nishita", "days": [ { "local_date": "1963-01-23", "window": { "start": { "local": "1963-01-24T00:51:23+08:00", "utc": "1963-01-23T16:51:23Z", "ms": -218963317065.6084 }, "end": { "local": "1963-01-24T01:39:23+08:00", "utc": "1963-01-23T17:39:23Z", "ms": -218960437065.6084 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-01-24", "window": { "start": { "local": "1963-01-25T00:51:38+08:00", "utc": "1963-01-24T16:51:38Z", "ms": -218876902087.57568 }, "end": { "local": "1963-01-25T01:39:38+08:00", "utc": "1963-01-24T17:39:38Z", "ms": -218874022087.57568 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:43 on Wed 23 Jan to 23:00 on Thu 24 Jan.", "fact": "1963-01-23T15:43:00Z → 1963-01-24T14:59:31Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:51–01:39 on the 23rd, 00:52–01:40 on the 24th.", "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 23rd and 0 of 48 on the 24th.", "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 4103 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Wednesday 23 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": "1963-01-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-23", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Wednesday 23 January. Caturdaśī runs from 23:43 on Wed 23 Jan to 23:00 on Thu 24 Jan and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-01-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/yama-tarpana", "festival": "yama-tarpana", "name": "Yama Tarpaṇa", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23345, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-01-23T23:43:00+08:00", "utc": "1963-01-23T15:43:00Z", "ms": -218967419637.04712 }, "end": { "local": "1963-01-24T22:59:31+08:00", "utc": "1963-01-24T14:59:31Z", "ms": -218883629073.49225 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-23T23:43:00+08:00", "utc": "1963-01-23T15:43:00Z", "ms": -218967419637.04712 }, "end": { "local": "1963-01-24T22:59:31+08:00", "utc": "1963-01-24T14:59:31Z", "ms": -218883629073.49225 } }, "kaala": "arunodaya", "days": [ { "local_date": "1963-01-24", "window": { "start": { "local": "1963-01-24T06:12:06+08:00", "utc": "1963-01-23T22:12:06Z", "ms": -218944074276.25967 }, "end": { "local": "1963-01-24T07:59:59+08:00", "utc": "1963-01-23T23:59:59Z", "ms": -218937600534.6783 } }, "covered_min": 108, "window_min": 108, "qualifies": true }, { "local_date": "1963-01-25", "window": { "start": { "local": "1963-01-25T06:11:52+08:00", "utc": "1963-01-24T22:11:52Z", "ms": -218857687503.791 }, "end": { "local": "1963-01-25T07:59:36+08:00", "utc": "1963-01-24T23:59:36Z", "ms": -218851224018.77838 } }, "covered_min": 0, "window_min": 108, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:43 on Wed 23 Jan to 23:00 on Thu 24 Jan.", "fact": "1963-01-23T15:43:00Z → 1963-01-24T14:59:31Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 06:12–08:00 on the 24th, 06:12–08:00 on the 25th.", "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 108 of 108 minutes on the 24th and 0 of 108 on the 25th.", "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 23345 s" }, { "step": "ruling", "text": "Yama Tarpaṇa, Chengdu, 1963: Thursday 24 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "yama-tarpana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Yama tarpana (covering a period of 4 ghatikas before sunrise)" } ], "kaala": "arunodaya", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-01-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-24", "confidence": "determinate" } ], "quote": "In Chengdu, Yama Tarpaṇa 1963 falls on Thursday 24 January. Caturdaśī runs from 23:43 on Wed 23 Jan to 23:00 on Thu 24 Jan and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/tila-chaturthi", "festival": "tila-chaturthi", "name": "Tila Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11205, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-01-28T15:28:29+08:00", "utc": "1963-01-28T07:28:29Z", "ms": -218565091342.54956 }, "end": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-28T15:28:29+08:00", "utc": "1963-01-28T07:28:29Z", "ms": -218565091342.54956 }, "end": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-01-28", "window": { "start": { "local": "1963-01-28T18:35:14+08:00", "utc": "1963-01-28T10:35:14Z", "ms": -218553886275.3498 }, "end": { "local": "1963-01-28T20:22:14+08:00", "utc": "1963-01-28T12:22:14Z", "ms": -218547465952.5754 } }, "covered_min": 107, "window_min": 107, "qualifies": true }, { "local_date": "1963-01-29", "window": { "start": { "local": "1963-01-29T18:36:07+08:00", "utc": "1963-01-29T10:36:07Z", "ms": -218467432951.7049 }, "end": { "local": "1963-01-29T20:22:56+08:00", "utc": "1963-01-29T12:22:56Z", "ms": -218461023920.95273 } }, "covered_min": 0, "window_min": 107, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 15:28 on Mon 28 Jan to 13:00 on Tue 29 Jan.", "fact": "1963-01-28T07:28:29Z → 1963-01-29T05:00:23Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:35–20:22 on the 28th, 18:36–20:23 on the 29th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during pradoṣa. It covers 107 of 107 minutes on the 28th and 0 of 107 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11205 s" }, { "step": "ruling", "text": "Tila Caturthī, Chengdu, 1963: Monday 28 January.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "tila-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 4 Tila caturthi and Kunda caturthi (pradosavyapini), Varada caturthi (Bengal & Orissa), Ganesa caturthi, Ganesa jayanti (madhyahnavyapini purvaviddha)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-01-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-28", "confidence": "determinate" } ], "quote": "In Chengdu, Tila Caturthī 1963 falls on Monday 28 January. Caturthī runs from 15:28 on Mon 28 Jan to 13:00 on Tue 29 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/shri-panchami", "festival": "shri-panchami", "name": "Śrī Pañcamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 447, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 }, "end": { "local": "1963-01-30T10:31:27+08:00", "utc": "1963-01-30T02:31:27Z", "ms": -218410112730.9369 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 }, "end": { "local": "1963-01-30T10:31:27+08:00", "utc": "1963-01-30T02:31:27Z", "ms": -218410112730.9369 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-01-29", "window": { "start": { "local": "1963-01-29T12:52:57+08:00", "utc": "1963-01-29T04:52:57Z", "ms": -218488023403.12335 }, "end": { "local": "1963-01-29T13:40:57+08:00", "utc": "1963-01-29T05:40:57Z", "ms": -218485143403.12335 } }, "covered_min": 41, "window_min": 48, "qualifies": true }, { "local_date": "1963-01-30", "window": { "start": { "local": "1963-01-30T12:53:08+08:00", "utc": "1963-01-30T04:53:08Z", "ms": -218401612486.14258 }, "end": { "local": "1963-01-30T13:41:08+08:00", "utc": "1963-01-30T05:41:08Z", "ms": -218398732486.14258 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 13:00 on Tue 29 Jan to 10:31 on Wed 30 Jan.", "fact": "1963-01-29T05:00:23Z → 1963-01-30T02:31:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:53–13:41 on the 29th, 12:53–13:41 on the 30th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 41 of 48 minutes on the 29th and 0 of 48 on the 30th.", "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 447 s" }, { "step": "ruling", "text": "Śrī Pañcamī, Chengdu, 1963: Tuesday 29 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": "1963-01-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-29", "confidence": "determinate" } ], "quote": "In Chengdu, Śrī Pañcamī 1963 falls on Tuesday 29 January. Pañcamī runs from 13:00 on Tue 29 Jan to 10:31 on Wed 30 Jan and covers 41 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vasanta-panchami", "festival": "vasanta-panchami", "name": "Vasanta Pañcamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 447, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 }, "end": { "local": "1963-01-30T10:31:27+08:00", "utc": "1963-01-30T02:31:27Z", "ms": -218410112730.9369 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 }, "end": { "local": "1963-01-30T10:31:27+08:00", "utc": "1963-01-30T02:31:27Z", "ms": -218410112730.9369 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-01-29", "window": { "start": { "local": "1963-01-29T12:52:57+08:00", "utc": "1963-01-29T04:52:57Z", "ms": -218488023403.12335 }, "end": { "local": "1963-01-29T13:40:57+08:00", "utc": "1963-01-29T05:40:57Z", "ms": -218485143403.12335 } }, "covered_min": 41, "window_min": 48, "qualifies": true }, { "local_date": "1963-01-30", "window": { "start": { "local": "1963-01-30T12:53:08+08:00", "utc": "1963-01-30T04:53:08Z", "ms": -218401612486.14258 }, "end": { "local": "1963-01-30T13:41:08+08:00", "utc": "1963-01-30T05:41:08Z", "ms": -218398732486.14258 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 13:00 on Tue 29 Jan to 10:31 on Wed 30 Jan.", "fact": "1963-01-29T05:00:23Z → 1963-01-30T02:31:27Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:53–13:41 on the 29th, 12:53–13:41 on the 30th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 41 of 48 minutes on the 29th and 0 of 48 on the 30th.", "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 447 s" }, { "step": "ruling", "text": "Vasanta Pañcamī, Chengdu, 1963: Tuesday 29 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": "1963-01-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-29", "confidence": "determinate" } ], "quote": "In Chengdu, Vasanta Pañcamī 1963 falls on Tuesday 29 January. Pañcamī runs from 13:00 on Tue 29 Jan to 10:31 on Wed 30 Jan and covers 41 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ganesha-jayanti", "festival": "ganesha-jayanti", "name": "Gaṇeśa Jayantī", "everyday": "Maghi Ganesh Jayanti", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 447, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-01-28T15:28:29+08:00", "utc": "1963-01-28T07:28:29Z", "ms": -218565091342.54956 }, "end": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-28T15:28:29+08:00", "utc": "1963-01-28T07:28:29Z", "ms": -218565091342.54956 }, "end": { "local": "1963-01-29T13:00:23+08:00", "utc": "1963-01-29T05:00:23Z", "ms": -218487576768.20053 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-01-28", "window": { "start": { "local": "1963-01-28T12:52:45+08:00", "utc": "1963-01-28T04:52:45Z", "ms": -218574435155.8086 }, "end": { "local": "1963-01-28T13:40:45+08:00", "utc": "1963-01-28T05:40:45Z", "ms": -218571555155.8086 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-01-29", "window": { "start": { "local": "1963-01-29T12:52:57+08:00", "utc": "1963-01-29T04:52:57Z", "ms": -218488023403.12335 }, "end": { "local": "1963-01-29T13:40:57+08:00", "utc": "1963-01-29T05:40:57Z", "ms": -218485143403.12335 } }, "covered_min": 7, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 15:28 on Mon 28 Jan to 13:00 on Tue 29 Jan.", "fact": "1963-01-28T07:28:29Z → 1963-01-29T05:00:23Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:53–13:41 on the 28th, 12:53–13:41 on the 29th.", "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 28th and 7 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 447 s" }, { "step": "ruling", "text": "Gaṇeśa Jayantī, Chengdu, 1963: Tuesday 29 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": "1963-01-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-29", "confidence": "determinate" } ], "quote": "In Chengdu, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1963 falls on Tuesday 29 January. Caturthī runs from 15:28 on Mon 28 Jan to 13:00 on Tue 29 Jan and covers 7 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ratha-saptami", "festival": "ratha-saptami", "name": "Ratha Saptamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-01-31", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 634, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1963-01-31T08:07:16+08:00", "utc": "1963-01-31T00:07:16Z", "ms": -218332364255.61514 }, "end": { "local": "1963-02-01T05:52:30+08:00", "utc": "1963-01-31T21:52:30Z", "ms": -218254050253.0194 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-01-31T08:07:16+08:00", "utc": "1963-01-31T00:07:16Z", "ms": -218332364255.61514 }, "end": { "local": "1963-02-01T05:52:30+08:00", "utc": "1963-01-31T21:52:30Z", "ms": -218254050253.0194 } }, "kaala": "arunodaya", "days": [ { "local_date": "1963-01-31", "window": { "start": { "local": "1963-01-31T06:10:04+08:00", "utc": "1963-01-30T22:10:04Z", "ms": -218339395669.2831 }, "end": { "local": "1963-01-31T07:56:42+08:00", "utc": "1963-01-30T23:56:42Z", "ms": -218332998118.21567 } }, "covered_min": 0, "window_min": 107, "qualifies": false }, { "local_date": "1963-02-01", "window": { "start": { "local": "1963-02-01T06:09:42+08:00", "utc": "1963-01-31T22:09:42Z", "ms": -218253018416.33643 }, "end": { "local": "1963-02-01T07:56:07+08:00", "utc": "1963-01-31T23:56:07Z", "ms": -218246632526.19763 } }, "covered_min": 0, "window_min": 106, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 08:07 on Thu 31 Jan to 05:52 on Fri 1 Feb.", "fact": "1963-01-31T00:07:16Z → 1963-01-31T21:52:30Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 06:10–07:57 on the 31st, 06:10–07:56 on the 1st.", "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 31st and 0 of 106 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Neither dawn qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 634 s" }, { "step": "ruling", "text": "Ratha Saptamī, Chengdu, 1963: Thursday 31 January.", "fact": "confidence: boundary (absent-unstated)" } ], "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": "1963-01-31", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-01-31", "confidence": "boundary" } ], "quote": "In Chengdu, Ratha Saptamī 1963 falls on Thursday 31 January. Saptamī runs from 08:07 on Thu 31 Jan to 05:52 on Fri 1 Feb, and reaches aruṇodaya on neither day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-02-04", "festival": "ekadashi", "name": "Jayā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26173, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-02-04T00:38:03+08:00", "utc": "1963-02-03T16:38:03Z", "ms": -218013717201.6004 }, "end": { "local": "1963-02-04T23:30:41+08:00", "utc": "1963-02-04T15:30:41Z", "ms": -217931359057.50076 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-02-04T00:38:03+08:00", "utc": "1963-02-03T16:38:03Z", "ms": -218013717201.6004 }, "end": { "local": "1963-02-04T23:30:41+08:00", "utc": "1963-02-04T15:30:41Z", "ms": -217931359057.50076 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-02-04", "window": { "start": { "local": "1963-02-04T07:54:15+08:00", "utc": "1963-02-03T23:54:15Z", "ms": -217987544586.3728 }, "end": { "local": "1963-02-04T07:54:15+08:00", "utc": "1963-02-03T23:54:15Z", "ms": -217987544586.3728 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-02-05", "window": { "start": { "local": "1963-02-05T07:53:35+08:00", "utc": "1963-02-04T23:53:35Z", "ms": -217901184800.42966 }, "end": { "local": "1963-02-05T07:53:35+08:00", "utc": "1963-02-04T23:53:35Z", "ms": -217901184800.42966 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 00:38 on Mon 4 Feb to 23:31 on Mon 4 Feb.", "fact": "1963-02-03T16:38:03Z → 1963-02-04T15:30:41Z" }, { "step": "kaala", "text": "Sunrise is at 07:54 on the 4th and 07:54 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 26173 s" }, { "step": "ruling", "text": "Jayā Ekādaśī, Chengdu, 1963: Monday 4 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-02-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-04", "confidence": "determinate" } ], "quote": "In Chengdu, Jayā Ekādaśī 1963 falls on Monday 4 February. Ekādaśī runs from 00:38 on Mon 4 Feb to 23:31 on Mon 4 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-02-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/bhishma-dvadashi", "festival": "bhishma-dvadashi", "name": "Bhīṣma Dvādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32572, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1963-02-04T23:30:41+08:00", "utc": "1963-02-04T15:30:41Z", "ms": -217931359057.50076 }, "end": { "local": "1963-02-05T22:44:48+08:00", "utc": "1963-02-05T14:44:48Z", "ms": -217847712458.4717 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-02-04T23:30:41+08:00", "utc": "1963-02-04T15:30:41Z", "ms": -217931359057.50076 }, "end": { "local": "1963-02-05T22:44:48+08:00", "utc": "1963-02-05T14:44:48Z", "ms": -217847712458.4717 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-02-04", "window": { "start": { "local": "1963-02-04T12:53:49+08:00", "utc": "1963-02-04T04:53:49Z", "ms": -217969570544.45984 }, "end": { "local": "1963-02-04T13:41:49+08:00", "utc": "1963-02-04T05:41:49Z", "ms": -217966690544.45984 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-02-05", "window": { "start": { "local": "1963-02-05T12:53:55+08:00", "utc": "1963-02-05T04:53:55Z", "ms": -217883164675.7426 }, "end": { "local": "1963-02-05T13:41:55+08:00", "utc": "1963-02-05T05:41:55Z", "ms": -217880284675.7426 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 23:31 on Mon 4 Feb to 22:45 on Tue 5 Feb.", "fact": "1963-02-04T15:30:41Z → 1963-02-05T14:44:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:54–13:42 on the 4th, 12:54–13:42 on the 5th.", "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 4th and 48 of 48 on the 5th.", "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 32572 s" }, { "step": "ruling", "text": "Bhīṣma Dvādaśī, Chengdu, 1963: Tuesday 5 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bhishma-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Bhisma dvadasi (purvaviddha), Amalaki dvadasi, Santana dvadasi, Varaha dvadasi" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-02-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-05", "confidence": "determinate" } ], "quote": "In Chengdu, Bhīṣma Dvādaśī 1963 falls on Tuesday 5 February. Dvādaśī runs from 23:31 on Mon 4 Feb to 22:45 on Tue 5 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/pradosha-vrata?on=1963-02-06", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6815, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-02-05T22:44:48+08:00", "utc": "1963-02-05T14:44:48Z", "ms": -217847712458.4717 }, "end": { "local": "1963-02-06T22:21:55+08:00", "utc": "1963-02-06T14:21:55Z", "ms": -217762685219.2952 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-02-05T22:44:48+08:00", "utc": "1963-02-05T14:44:48Z", "ms": -217847712458.4717 }, "end": { "local": "1963-02-06T22:21:55+08:00", "utc": "1963-02-06T14:21:55Z", "ms": -217762685219.2952 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-02-05", "window": { "start": { "local": "1963-02-05T18:42:15+08:00", "utc": "1963-02-05T10:42:15Z", "ms": -217862264551.05557 }, "end": { "local": "1963-02-05T20:27:41+08:00", "utc": "1963-02-05T12:27:41Z", "ms": -217855939464.1498 } }, "covered_min": 0, "window_min": 105, "qualifies": false }, { "local_date": "1963-02-06", "window": { "start": { "local": "1963-02-06T18:43:07+08:00", "utc": "1963-02-06T10:43:07Z", "ms": -217775812870.81805 }, "end": { "local": "1963-02-06T20:28:20+08:00", "utc": "1963-02-06T12:28:20Z", "ms": -217769500401.94244 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 22:45 on Tue 5 Feb to 22:22 on Wed 6 Feb.", "fact": "1963-02-05T14:44:48Z → 1963-02-06T14:21:55Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:42–20:28 on the 5th, 18:43–20:28 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 105 minutes on the 5th and 105 of 105 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 6815 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Wednesday 6 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": "1963-02-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-06", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Wednesday 6 February. Trayodaśī runs from 22:45 on Tue 5 Feb to 22:22 on Wed 6 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-02-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/maghi-purnima", "festival": "maghi-purnima", "name": "Māghī Pūrṇimā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31295, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-02-07T22:23:40+08:00", "utc": "1963-02-07T14:23:40Z", "ms": -217676179979.53055 }, "end": { "local": "1963-02-08T22:51:39+08:00", "utc": "1963-02-08T14:51:39Z", "ms": -217588101459.28638 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1963-02-07T22:23:40+08:00", "utc": "1963-02-07T14:23:40Z", "ms": -217676179979.53055 }, "end": { "local": "1963-02-08T22:51:39+08:00", "utc": "1963-02-08T14:51:39Z", "ms": -217588101459.28638 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-02-07", "window": { "start": { "local": "1963-02-07T12:54:05+08:00", "utc": "1963-02-07T04:54:05Z", "ms": -217710355414.2603 }, "end": { "local": "1963-02-07T13:42:05+08:00", "utc": "1963-02-07T05:42:05Z", "ms": -217707475414.2603 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-02-08", "window": { "start": { "local": "1963-02-08T12:54:08+08:00", "utc": "1963-02-08T04:54:08Z", "ms": -217623952004.2353 }, "end": { "local": "1963-02-08T13:42:08+08:00", "utc": "1963-02-08T05:42:08Z", "ms": -217621072004.2353 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 22:24 on Thu 7 Feb to 22:52 on Fri 8 Feb.", "fact": "1963-02-07T14:23:40Z → 1963-02-08T14:51:39Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:54–13:42 on the 7th, 12:54–13:42 on the 8th.", "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 7th and 48 of 48 on the 8th.", "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 31295 s" }, { "step": "ruling", "text": "Māghī Pūrṇimā, Chengdu, 1963: Friday 8 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "maghi-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Maghi purnima (paraviddha)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-02-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-08", "confidence": "determinate" } ], "quote": "In Chengdu, Māghī Pūrṇimā 1963 falls on Friday 8 February. Pūrṇimā runs from 22:24 on Thu 7 Feb to 22:52 on Fri 8 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-02-12", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20442, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-02-12T02:59:16+08:00", "utc": "1963-02-11T18:59:16Z", "ms": -217314043679.28677 }, "end": { "local": "1963-02-13T05:10:37+08:00", "utc": "1963-02-12T21:10:37Z", "ms": -217219762560.2432 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-02-12T02:59:16+08:00", "utc": "1963-02-11T18:59:16Z", "ms": -217314043679.28677 }, "end": { "local": "1963-02-13T05:10:37+08:00", "utc": "1963-02-12T21:10:37Z", "ms": -217219762560.2432 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-02-11", "window": { "start": { "local": "1963-02-11T21:18:34+08:00", "utc": "1963-02-11T13:18:34Z", "ms": -217334486059.5772 }, "end": { "local": "1963-02-11T21:18:34+08:00", "utc": "1963-02-11T13:18:34Z", "ms": -217334486059.5772 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-02-12", "window": { "start": { "local": "1963-02-12T22:11:42+08:00", "utc": "1963-02-12T14:11:42Z", "ms": -217244897585.14948 }, "end": { "local": "1963-02-12T22:11:42+08:00", "utc": "1963-02-12T14:11:42Z", "ms": -217244897585.14948 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:59 on Tue 12 Feb to 05:11 on Wed 13 Feb.", "fact": "1963-02-11T18:59:16Z → 1963-02-12T21:10:37Z" }, { "step": "kaala", "text": "Moonrise is at 21:19 on the 11th and 22:12 on the 12th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 11th and is on the 12th.", "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 20442 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Tuesday 12 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": "1963-02-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-12", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Tuesday 12 February. Caturthī runs from 02:59 on Tue 12 Feb to 05:11 on Wed 13 Feb and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-02-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-02-20", "festival": "ekadashi", "name": "Vijayā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33446, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-02-19T16:59:26+08:00", "utc": "1963-02-19T08:59:26Z", "ms": -216658834156.6387 }, "end": { "local": "1963-02-20T17:03:20+08:00", "utc": "1963-02-20T09:03:20Z", "ms": -216572200259.16727 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-02-19T16:59:26+08:00", "utc": "1963-02-19T08:59:26Z", "ms": -216658834156.6387 }, "end": { "local": "1963-02-20T17:03:20+08:00", "utc": "1963-02-20T09:03:20Z", "ms": -216572200259.16727 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-02-19", "window": { "start": { "local": "1963-02-19T07:42:00+08:00", "utc": "1963-02-18T23:42:00Z", "ms": -216692279894.931 }, "end": { "local": "1963-02-19T07:42:00+08:00", "utc": "1963-02-18T23:42:00Z", "ms": -216692279894.931 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-02-20", "window": { "start": { "local": "1963-02-20T07:41:02+08:00", "utc": "1963-02-19T23:41:02Z", "ms": -216605937809.19565 }, "end": { "local": "1963-02-20T07:41:02+08:00", "utc": "1963-02-19T23:41:02Z", "ms": -216605937809.19565 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:59 on Tue 19 Feb to 17:03 on Wed 20 Feb.", "fact": "1963-02-19T08:59:26Z → 1963-02-20T09:03:20Z" }, { "step": "kaala", "text": "Sunrise is at 07:42 on the 19th and 07:41 on the 20th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 19th and is on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33446 s" }, { "step": "ruling", "text": "Vijayā Ekādaśī, Chengdu, 1963: Wednesday 20 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": "1963-02-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-20", "confidence": "determinate" } ], "quote": "In Chengdu, Vijayā Ekādaśī 1963 falls on Wednesday 20 February. Ekādaśī runs from 16:59 on Tue 19 Feb to 17:03 on Wed 20 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-02-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-02-21", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9342, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-02-21T16:19:42+08:00", "utc": "1963-02-21T08:19:42Z", "ms": -216488417731.35956 }, "end": { "local": "1963-02-22T14:51:21+08:00", "utc": "1963-02-22T06:51:21Z", "ms": -216407318953.18625 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-02-21T16:19:42+08:00", "utc": "1963-02-21T08:19:42Z", "ms": -216488417731.35956 }, "end": { "local": "1963-02-22T14:51:21+08:00", "utc": "1963-02-22T06:51:21Z", "ms": -216407318953.18625 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-02-21", "window": { "start": { "local": "1963-02-21T18:55:24+08:00", "utc": "1963-02-21T10:55:24Z", "ms": -216479075996.64493 }, "end": { "local": "1963-02-21T20:37:13+08:00", "utc": "1963-02-21T12:37:13Z", "ms": -216472966724.7887 } }, "covered_min": 102, "window_min": 102, "qualifies": true }, { "local_date": "1963-02-22", "window": { "start": { "local": "1963-02-22T18:56:10+08:00", "utc": "1963-02-22T10:56:10Z", "ms": -216392629666.46466 }, "end": { "local": "1963-02-22T20:37:45+08:00", "utc": "1963-02-22T12:37:45Z", "ms": -216386534662.74127 } }, "covered_min": 0, "window_min": 102, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 16:20 on Thu 21 Feb to 14:51 on Fri 22 Feb.", "fact": "1963-02-21T08:19:42Z → 1963-02-22T06:51:21Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:55–20:37 on the 21st, 18:56–20:38 on the 22nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 102 of 102 minutes on the 21st and 0 of 102 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 9342 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Thursday 21 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": "1963-02-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-21", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Thursday 21 February. Trayodaśī runs from 16:20 on Thu 21 Feb to 14:51 on Fri 22 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-02-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/maha-shivaratri", "festival": "maha-shivaratri", "name": "Mahāśivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36106, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-02-22T14:51:21+08:00", "utc": "1963-02-22T06:51:21Z", "ms": -216407318953.18625 }, "end": { "local": "1963-02-23T12:44:03+08:00", "utc": "1963-02-23T04:44:03Z", "ms": -216328557484.84363 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-02-22T14:51:21+08:00", "utc": "1963-02-22T06:51:21Z", "ms": -216407318953.18625 }, "end": { "local": "1963-02-23T12:44:03+08:00", "utc": "1963-02-23T04:44:03Z", "ms": -216328557484.84363 } }, "kaala": "nishita", "days": [ { "local_date": "1963-02-22", "window": { "start": { "local": "1963-02-23T00:53:07+08:00", "utc": "1963-02-22T16:53:07Z", "ms": -216371213402.50195 }, "end": { "local": "1963-02-23T01:41:07+08:00", "utc": "1963-02-22T17:41:07Z", "ms": -216368333402.50195 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-02-23", "window": { "start": { "local": "1963-02-24T00:52:59+08:00", "utc": "1963-02-23T16:52:59Z", "ms": -216284821198.2 }, "end": { "local": "1963-02-24T01:40:59+08:00", "utc": "1963-02-23T17:40:59Z", "ms": -216281941198.2 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 14:51 on Fri 22 Feb to 12:44 on Sat 23 Feb.", "fact": "1963-02-22T06:51:21Z → 1963-02-23T04:44:03Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:53–01:41 on the 22nd, 00:53–01:41 on the 23rd.", "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 22nd and 0 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 36106 s" }, { "step": "ruling", "text": "Mahāśivarātri, Chengdu, 1963: Friday 22 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": "1963-02-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-22", "confidence": "determinate" } ], "quote": "In Chengdu, Mahāśivarātri 1963 falls on Friday 22 February. Caturdaśī runs from 14:51 on Fri 22 Feb to 12:44 on Sat 23 Feb and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-02-27", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-02-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28144, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-02-27T00:37:53+08:00", "utc": "1963-02-26T16:37:53Z", "ms": -216026526891.72177 }, "end": { "local": "1963-02-27T21:29:58+08:00", "utc": "1963-02-27T13:29:58Z", "ms": -215951401503.4989 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-02-27T00:37:53+08:00", "utc": "1963-02-26T16:37:53Z", "ms": -216026526891.72177 }, "end": { "local": "1963-02-27T21:29:58+08:00", "utc": "1963-02-27T13:29:58Z", "ms": -215951401503.4989 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-02-26", "window": { "start": { "local": "1963-02-26T12:53:04+08:00", "utc": "1963-02-26T04:53:04Z", "ms": -216068816193.5332 }, "end": { "local": "1963-02-26T13:41:04+08:00", "utc": "1963-02-26T05:41:04Z", "ms": -216065936193.5332 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-02-27", "window": { "start": { "local": "1963-02-27T12:52:54+08:00", "utc": "1963-02-27T04:52:54Z", "ms": -215982425975.1494 }, "end": { "local": "1963-02-27T13:40:54+08:00", "utc": "1963-02-27T05:40:54Z", "ms": -215979545975.1494 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 00:38 on Wed 27 Feb to 21:30 on Wed 27 Feb.", "fact": "1963-02-26T16:37:53Z → 1963-02-27T13:29:58Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:53–13:41 on the 26th, 12:53–13:41 on the 27th.", "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 26th and 48 of 48 on the 27th.", "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 28144 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Wednesday 27 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": "1963-02-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-02-27", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Wednesday 27 February. Caturthī runs from 00:38 on Wed 27 Feb to 21:30 on Wed 27 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-02-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-03-06", "festival": "ekadashi", "name": "Āmalakī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13594, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-03-05T11:13:46+08:00", "utc": "1963-03-05T03:13:46Z", "ms": -215469973639.82892 }, "end": { "local": "1963-03-06T11:19:07+08:00", "utc": "1963-03-06T03:19:07Z", "ms": -215383252823.21802 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-03-05T11:13:46+08:00", "utc": "1963-03-05T03:13:46Z", "ms": -215469973639.82892 }, "end": { "local": "1963-03-06T11:19:07+08:00", "utc": "1963-03-06T03:19:07Z", "ms": -215383252823.21802 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-03-05", "window": { "start": { "local": "1963-03-05T07:27:12+08:00", "utc": "1963-03-04T23:27:12Z", "ms": -215483567535.6359 }, "end": { "local": "1963-03-05T07:27:12+08:00", "utc": "1963-03-04T23:27:12Z", "ms": -215483567535.6359 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-03-06", "window": { "start": { "local": "1963-03-06T07:26:04+08:00", "utc": "1963-03-05T23:26:04Z", "ms": -215397236321.31952 }, "end": { "local": "1963-03-06T07:26:04+08:00", "utc": "1963-03-05T23:26:04Z", "ms": -215397236321.31952 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:14 on Tue 5 Mar to 11:19 on Wed 6 Mar.", "fact": "1963-03-05T03:13:46Z → 1963-03-06T03:19:07Z" }, { "step": "kaala", "text": "Sunrise is at 07:27 on the 5th and 07:26 on the 6th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 5th and is on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 13594 s" }, { "step": "ruling", "text": "Āmalakī Ekādaśī, Chengdu, 1963: Wednesday 6 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": "1963-03-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-06", "confidence": "determinate" } ], "quote": "In Chengdu, Āmalakī Ekādaśī 1963 falls on Wednesday 6 March. Ekādaśī runs from 11:14 on Tue 5 Mar to 11:19 on Wed 6 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-03-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-03-07", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22612, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-03-07T11:51:59+08:00", "utc": "1963-03-07T03:51:59Z", "ms": -215294881227.85995 }, "end": { "local": "1963-03-08T12:49:28+08:00", "utc": "1963-03-08T04:49:28Z", "ms": -215205032163.821 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-03-07T11:51:59+08:00", "utc": "1963-03-07T03:51:59Z", "ms": -215294881227.85995 }, "end": { "local": "1963-03-08T12:49:28+08:00", "utc": "1963-03-08T04:49:28Z", "ms": -215205032163.821 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-03-07", "window": { "start": { "local": "1963-03-07T19:05:39+08:00", "utc": "1963-03-07T11:05:39Z", "ms": -215268861294.9524 }, "end": { "local": "1963-03-07T20:44:03+08:00", "utc": "1963-03-07T12:44:03Z", "ms": -215262956527.30634 } }, "covered_min": 98, "window_min": 98, "qualifies": true }, { "local_date": "1963-03-08", "window": { "start": { "local": "1963-03-08T19:06:20+08:00", "utc": "1963-03-08T11:06:20Z", "ms": -215182420030.35428 }, "end": { "local": "1963-03-08T20:44:30+08:00", "utc": "1963-03-08T12:44:30Z", "ms": -215176530146.8898 } }, "covered_min": 0, "window_min": 98, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:52 on Thu 7 Mar to 12:49 on Fri 8 Mar.", "fact": "1963-03-07T03:51:59Z → 1963-03-08T04:49:28Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:06–20:44 on the 7th, 19:06–20:44 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 98 of 98 minutes on the 7th and 0 of 98 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 22612 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Thursday 7 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": "1963-03-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-07", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Thursday 7 March. Trayodaśī runs from 11:52 on Thu 7 Mar to 12:49 on Fri 8 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-03-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/holika-dahana", "festival": "holika-dahana", "name": "Holikā Dahana", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3472, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-03-09T14:09:02+08:00", "utc": "1963-03-09T06:09:02Z", "ms": -215113858280.25327 }, "end": { "local": "1963-03-10T15:48:34+08:00", "utc": "1963-03-10T07:48:34Z", "ms": -215021485970.86963 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-03-09T14:09:02+08:00", "utc": "1963-03-09T06:09:02Z", "ms": -215113858280.25327 }, "end": { "local": "1963-03-10T15:48:34+08:00", "utc": "1963-03-10T07:48:34Z", "ms": -215021485970.86963 } }, "kaala": "sayahna", "days": [ { "local_date": "1963-03-09", "window": { "start": { "local": "1963-03-09T16:46:08+08:00", "utc": "1963-03-09T08:46:08Z", "ms": -215104432432.95062 }, "end": { "local": "1963-03-09T19:07:01+08:00", "utc": "1963-03-09T11:07:01Z", "ms": -215095979065.0956 } }, "covered_min": 141, "window_min": 141, "qualifies": true }, { "local_date": "1963-03-10", "window": { "start": { "local": "1963-03-10T16:46:26+08:00", "utc": "1963-03-10T08:46:26Z", "ms": -215018014054.97015 }, "end": { "local": "1963-03-10T19:07:42+08:00", "utc": "1963-03-10T11:07:42Z", "ms": -215009538385.22656 } }, "covered_min": 0, "window_min": 141, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:09 on Sat 9 Mar to 15:49 on Sun 10 Mar.", "fact": "1963-03-09T06:09:02Z → 1963-03-10T07:48:34Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:46–19:07 on the 9th, 16:46–19:08 on the 10th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 141 of 141 minutes on the 9th and 0 of 141 on the 10th.", "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 3472 s" }, { "step": "ruling", "text": "Holikā Dahana, Chengdu, 1963: Saturday 9 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": "1963-03-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-09", "confidence": "determinate" } ], "quote": "In Chengdu, Holikā Dahana 1963 falls on Saturday 9 March. Pūrṇimā runs from 14:09 on Sat 9 Mar to 15:49 on Sun 10 Mar and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/holi", "festival": "holi", "name": "Holī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3472, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-03-09T14:09:02+08:00", "utc": "1963-03-09T06:09:02Z", "ms": -215113858280.25327 }, "end": { "local": "1963-03-10T15:48:34+08:00", "utc": "1963-03-10T07:48:34Z", "ms": -215021485970.86963 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1963-03-09T14:09:02+08:00", "utc": "1963-03-09T06:09:02Z", "ms": -215113858280.25327 }, "end": { "local": "1963-03-10T15:48:34+08:00", "utc": "1963-03-10T07:48:34Z", "ms": -215021485970.86963 } }, "kaala": "sayahna", "days": [ { "local_date": "1963-03-09", "window": { "start": { "local": "1963-03-09T16:46:08+08:00", "utc": "1963-03-09T08:46:08Z", "ms": -215104432432.95062 }, "end": { "local": "1963-03-09T19:07:01+08:00", "utc": "1963-03-09T11:07:01Z", "ms": -215095979065.0956 } }, "covered_min": 141, "window_min": 141, "qualifies": true }, { "local_date": "1963-03-10", "window": { "start": { "local": "1963-03-10T16:46:26+08:00", "utc": "1963-03-10T08:46:26Z", "ms": -215018014054.97015 }, "end": { "local": "1963-03-10T19:07:42+08:00", "utc": "1963-03-10T11:07:42Z", "ms": -215009538385.22656 } }, "covered_min": 0, "window_min": 141, "qualifies": false } ], "follows": { "festival": "holika-dahana", "name": "Holikā Dahana", "local_date": "1963-03-09", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:09 on Sat 9 Mar to 15:49 on Sun 10 Mar.", "fact": "1963-03-09T06:09:02Z → 1963-03-10T07:48:34Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 16:46–19:07 on the 9th, 16:46–19:08 on the 10th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 141 of 141 minutes on the 9th and 0 of 141 on the 10th.", "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 3472 s" }, { "step": "counted", "text": "Holī is kept the day after Holikā Dahana: Saturday 9 March is the day taken above.", "fact": "follows: holika-dahana + 1 d" }, { "step": "ruling", "text": "Holī, Chengdu, 1963: Sunday 10 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": "1963-03-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-10", "confidence": "determinate" } ], "quote": "In Chengdu, Holī 1963 falls on Sunday 10 March. It is kept the day after Holikā Dahana, which falls on Saturday 9 March. Pūrṇimā runs from 14:09 on Sat 9 Mar to 15:49 on Sun 10 Mar and covers all of sāyāhna on the 9th.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vasantotsava", "festival": "vasantotsava", "name": "Vasantotsava", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30431, "anga": { "type": "tithi", "index": 15, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1963-03-10T15:48:34+08:00", "utc": "1963-03-10T07:48:34Z", "ms": -215021485970.86963 }, "end": { "local": "1963-03-11T17:46:06+08:00", "utc": "1963-03-11T09:46:06Z", "ms": -214928034057.31876 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-10T15:48:34+08:00", "utc": "1963-03-10T07:48:34Z", "ms": -215021485970.86963 }, "end": { "local": "1963-03-11T17:46:06+08:00", "utc": "1963-03-11T09:46:06Z", "ms": -214928034057.31876 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-03-10", "window": { "start": { "local": "1963-03-10T07:21:23+08:00", "utc": "1963-03-09T23:21:23Z", "ms": -215051916733.94455 }, "end": { "local": "1963-03-10T07:21:23+08:00", "utc": "1963-03-09T23:21:23Z", "ms": -215051916733.94455 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-03-11", "window": { "start": { "local": "1963-03-11T07:20:12+08:00", "utc": "1963-03-10T23:20:12Z", "ms": -214965587995.69543 }, "end": { "local": "1963-03-11T07:20:12+08:00", "utc": "1963-03-10T23:20:12Z", "ms": -214965587995.69543 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 15:49 on Sun 10 Mar to 17:46 on Mon 11 Mar.", "fact": "1963-03-10T07:48:34Z → 1963-03-11T09:46:06Z" }, { "step": "kaala", "text": "Sunrise is at 07:21 on the 10th and 07:20 on the 11th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā 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: purvaviddha → only-day · margin 30431 s" }, { "step": "ruling", "text": "Vasantotsava, Chengdu, 1963: Monday 11 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": "1963-03-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-11", "confidence": "determinate" } ], "quote": "In Chengdu, Vasantotsava 1963 falls on Monday 11 March. Pratipadā runs from 15:49 on Sun 10 Mar to 17:46 on Mon 11 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-03-14", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2069, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-03-13T22:23:47+08:00", "utc": "1963-03-13T14:23:47Z", "ms": -214738573457.82602 }, "end": { "local": "1963-03-15T00:54:07+08:00", "utc": "1963-03-14T16:54:07Z", "ms": -214643152800.74896 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-13T22:23:47+08:00", "utc": "1963-03-13T14:23:47Z", "ms": -214738573457.82602 }, "end": { "local": "1963-03-15T00:54:07+08:00", "utc": "1963-03-14T16:54:07Z", "ms": -214643152800.74896 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-03-13", "window": { "start": { "local": "1963-03-13T21:49:18+08:00", "utc": "1963-03-13T13:49:18Z", "ms": -214740642188.84082 }, "end": { "local": "1963-03-13T21:49:18+08:00", "utc": "1963-03-13T13:49:18Z", "ms": -214740642188.84082 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-03-14", "window": { "start": { "local": "1963-03-14T22:41:56+08:00", "utc": "1963-03-14T14:41:56Z", "ms": -214651084370.78336 }, "end": { "local": "1963-03-14T22:41:56+08:00", "utc": "1963-03-14T14:41:56Z", "ms": -214651084370.78336 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:24 on Wed 13 Mar to 00:54 on Fri 15 Mar.", "fact": "1963-03-13T14:23:47Z → 1963-03-14T16:54:07Z" }, { "step": "kaala", "text": "Moonrise is at 21:49 on the 13th and 22:42 on the 14th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 13th and is on the 14th.", "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 2069 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Thursday 14 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": "1963-03-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-14", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Thursday 14 March. Caturthī runs from 22:24 on Wed 13 Mar to 00:54 on Fri 15 Mar and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-03-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shitalashtami", "festival": "shitalashtami", "name": "Śītalāṣṭamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14928, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-03-18T07:25:39+08:00", "utc": "1963-03-17T23:25:39Z", "ms": -214360461209.93906 }, "end": { "local": "1963-03-19T08:39:16+08:00", "utc": "1963-03-19T00:39:16Z", "ms": -214269643880.51398 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-18T07:25:39+08:00", "utc": "1963-03-17T23:25:39Z", "ms": -214360461209.93906 }, "end": { "local": "1963-03-19T08:39:16+08:00", "utc": "1963-03-19T00:39:16Z", "ms": -214269643880.51398 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-03-18", "window": { "start": { "local": "1963-03-18T12:48:21+08:00", "utc": "1963-03-18T04:48:21Z", "ms": -214341098865.53674 }, "end": { "local": "1963-03-18T13:36:21+08:00", "utc": "1963-03-18T05:36:21Z", "ms": -214338218865.53674 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-03-19", "window": { "start": { "local": "1963-03-19T12:48:04+08:00", "utc": "1963-03-19T04:48:04Z", "ms": -214254716281.306 }, "end": { "local": "1963-03-19T13:36:04+08:00", "utc": "1963-03-19T05:36:04Z", "ms": -214251836281.306 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 07:26 on Mon 18 Mar to 08:39 on Tue 19 Mar.", "fact": "1963-03-17T23:25:39Z → 1963-03-19T00:39:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:48–13:36 on the 18th, 12:48–13:36 on the 19th.", "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 18th and 0 of 48 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 14928 s" }, { "step": "ruling", "text": "Śītalāṣṭamī, Chengdu, 1963: Monday 18 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": "1963-03-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-18", "confidence": "determinate" } ], "quote": "In Chengdu, Śītalāṣṭamī 1963 falls on Monday 18 March. Aṣṭamī runs from 07:26 on Mon 18 Mar to 08:39 on Tue 19 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-03-22", "festival": "ekadashi", "name": "Pāpamocanī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1772, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-03-21T08:47:37+08:00", "utc": "1963-03-21T00:47:37Z", "ms": -214096342628.6061 }, "end": { "local": "1963-03-22T07:36:20+08:00", "utc": "1963-03-21T23:36:20Z", "ms": -214014219692.1195 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-21T08:47:37+08:00", "utc": "1963-03-21T00:47:37Z", "ms": -214096342628.6061 }, "end": { "local": "1963-03-22T07:36:20+08:00", "utc": "1963-03-21T23:36:20Z", "ms": -214014219692.1195 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-03-21", "window": { "start": { "local": "1963-03-21T07:08:02+08:00", "utc": "1963-03-20T23:08:02Z", "ms": -214102317587.69138 }, "end": { "local": "1963-03-21T07:08:02+08:00", "utc": "1963-03-20T23:08:02Z", "ms": -214102317587.69138 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-03-22", "window": { "start": { "local": "1963-03-22T07:06:48+08:00", "utc": "1963-03-21T23:06:48Z", "ms": -214015991591.6553 }, "end": { "local": "1963-03-22T07:06:48+08:00", "utc": "1963-03-21T23:06:48Z", "ms": -214015991591.6553 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 08:48 on Thu 21 Mar to 07:36 on Fri 22 Mar.", "fact": "1963-03-21T00:47:37Z → 1963-03-21T23:36:20Z" }, { "step": "kaala", "text": "Sunrise is at 07:08 on the 21st and 07:07 on the 22nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 21st and is on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 1772 s" }, { "step": "ruling", "text": "Pāpamocanī Ekādaśī, Chengdu, 1963: Friday 22 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": "1963-03-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-22", "confidence": "determinate" } ], "quote": "In Chengdu, Pāpamocanī Ekādaśī 1963 falls on Friday 22 March. Ekādaśī runs from 08:48 on Thu 21 Mar to 07:36 on Fri 22 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-03-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-03-23", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22004, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-03-23T05:37:28+08:00", "utc": "1963-03-22T21:37:28Z", "ms": -213934951692.44376 }, "end": { "local": "1963-03-24T02:57:20+08:00", "utc": "1963-03-23T18:57:20Z", "ms": -213858160055.6756 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-23T05:37:28+08:00", "utc": "1963-03-22T21:37:28Z", "ms": -213934951692.44376 }, "end": { "local": "1963-03-24T02:57:20+08:00", "utc": "1963-03-23T18:57:20Z", "ms": -213858160055.6756 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-03-22", "window": { "start": { "local": "1963-03-22T19:15:33+08:00", "utc": "1963-03-22T11:15:33Z", "ms": -213972267125.63876 }, "end": { "local": "1963-03-22T20:50:13+08:00", "utc": "1963-03-22T12:50:13Z", "ms": -213966586931.93896 } }, "covered_min": 0, "window_min": 95, "qualifies": false }, { "local_date": "1963-03-23", "window": { "start": { "local": "1963-03-23T19:16:11+08:00", "utc": "1963-03-23T11:16:11Z", "ms": -213885828856.0775 }, "end": { "local": "1963-03-23T20:50:36+08:00", "utc": "1963-03-23T12:50:36Z", "ms": -213880163649.3405 } }, "covered_min": 94, "window_min": 94, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 05:37 on Sat 23 Mar to 02:57 on Sun 24 Mar.", "fact": "1963-03-22T21:37:28Z → 1963-03-23T18:57:20Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:16–20:50 on the 22nd, 19:16–20:51 on the 23rd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 95 minutes on the 22nd and 94 of 94 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 22004 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Saturday 23 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": "1963-03-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-23", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Saturday 23 March. Trayodaśī runs from 05:37 on Sat 23 Mar to 02:57 on Sun 24 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-03-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-03-23", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-23", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 3680, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-03-24T02:57:20+08:00", "utc": "1963-03-23T18:57:20Z", "ms": -213858160055.6756 }, "end": { "local": "1963-03-24T23:44:38+08:00", "utc": "1963-03-24T15:44:38Z", "ms": -213783322150.45624 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-24T02:57:20+08:00", "utc": "1963-03-23T18:57:20Z", "ms": -213858160055.6756 }, "end": { "local": "1963-03-24T23:44:38+08:00", "utc": "1963-03-24T15:44:38Z", "ms": -213783322150.45624 } }, "kaala": "nishita", "days": [ { "local_date": "1963-03-23", "window": { "start": { "local": "1963-03-24T00:46:16+08:00", "utc": "1963-03-23T16:46:16Z", "ms": -213866024330.81372 }, "end": { "local": "1963-03-24T01:34:16+08:00", "utc": "1963-03-23T17:34:16Z", "ms": -213863144330.81372 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-03-24", "window": { "start": { "local": "1963-03-25T00:45:58+08:00", "utc": "1963-03-24T16:45:58Z", "ms": -213779642327.4437 }, "end": { "local": "1963-03-25T01:33:58+08:00", "utc": "1963-03-24T17:33:58Z", "ms": -213776762327.4437 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 02:57 on Sun 24 Mar to 23:45 on Sun 24 Mar.", "fact": "1963-03-23T18:57:20Z → 1963-03-24T15:44:38Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:46–01:34 on the 23rd, 00:46–01:34 on the 24th.", "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 23rd and 0 of 48 on the 24th.", "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 3680 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Saturday 23 March.", "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": "1963-03-23", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-23", "confidence": "boundary" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Saturday 23 March. Caturdaśī runs from 02:57 on Sun 24 Mar to 23:45 on Sun 24 Mar, and reaches niśītha on neither day.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-03-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/navaratra-arambha-caitra", "festival": "navaratra-arambha-caitra", "name": "Navarātrārambha (Caitra)", "everyday": "Chaitra Navratri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10169, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1963-03-25T20:09:38+08:00", "utc": "1963-03-25T12:09:38Z", "ms": -213709821834.232 }, "end": { "local": "1963-03-26T16:23:28+08:00", "utc": "1963-03-26T08:23:28Z", "ms": -213636992341.05646 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-25T20:09:38+08:00", "utc": "1963-03-25T12:09:38Z", "ms": -213709821834.232 }, "end": { "local": "1963-03-26T16:23:28+08:00", "utc": "1963-03-26T08:23:28Z", "ms": -213636992341.05646 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-03-25", "window": { "start": { "local": "1963-03-25T12:46:17+08:00", "utc": "1963-03-25T04:46:17Z", "ms": -213736423292.70847 }, "end": { "local": "1963-03-25T13:34:17+08:00", "utc": "1963-03-25T05:34:17Z", "ms": -213733543292.70847 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-03-26", "window": { "start": { "local": "1963-03-26T12:45:59+08:00", "utc": "1963-03-26T04:45:59Z", "ms": -213650041383.84952 }, "end": { "local": "1963-03-26T13:33:59+08:00", "utc": "1963-03-26T05:33:59Z", "ms": -213647161383.84952 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 20:10 on Mon 25 Mar to 16:23 on Tue 26 Mar.", "fact": "1963-03-25T12:09:38Z → 1963-03-26T08:23:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 25th, 12:46–13:34 on the 26th.", "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 25th and 48 of 48 on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 10169 s" }, { "step": "ruling", "text": "Navarātrārambha (Caitra), Chengdu, 1963: Tuesday 26 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": "1963-03-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-26", "confidence": "determinate" } ], "quote": "In Chengdu, Navarātrārambha (Caitra) (Chaitra Navratri) 1963 falls on Tuesday 26 March. Pratipadā runs from 20:10 on Mon 25 Mar to 16:23 on Tue 26 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/gauri-tritiya", "festival": "gauri-tritiya", "name": "Gaurī Tṛtīyā", "everyday": "Gangaur", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 492, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-03-27T12:37:28+08:00", "utc": "1963-03-27T04:37:28Z", "ms": -213564151590.10245 }, "end": { "local": "1963-03-28T09:02:47+08:00", "utc": "1963-03-28T01:02:47Z", "ms": -213490633232.77277 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-27T12:37:28+08:00", "utc": "1963-03-27T04:37:28Z", "ms": -213564151590.10245 }, "end": { "local": "1963-03-28T09:02:47+08:00", "utc": "1963-03-28T01:02:47Z", "ms": -213490633232.77277 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-03-27", "window": { "start": { "local": "1963-03-27T12:45:40+08:00", "utc": "1963-03-27T04:45:40Z", "ms": -213563659506.3517 }, "end": { "local": "1963-03-27T13:33:40+08:00", "utc": "1963-03-27T05:33:40Z", "ms": -213560779506.3517 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-03-28", "window": { "start": { "local": "1963-03-28T12:45:22+08:00", "utc": "1963-03-28T04:45:22Z", "ms": -213477277645.13174 }, "end": { "local": "1963-03-28T13:33:22+08:00", "utc": "1963-03-28T05:33:22Z", "ms": -213474397645.13174 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 12:37 on Wed 27 Mar to 09:03 on Thu 28 Mar.", "fact": "1963-03-27T04:37:28Z → 1963-03-28T01:02:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 27th, 12:45–13:33 on the 28th.", "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 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: unstated → only-day · margin 492 s" }, { "step": "ruling", "text": "Gaurī Tṛtīyā, Chengdu, 1963: Wednesday 27 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": "1963-03-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-27", "confidence": "determinate" } ], "quote": "In Chengdu, Gaurī Tṛtīyā (Gangaur) 1963 falls on Wednesday 27 March. Tṛtīyā runs from 12:37 on Wed 27 Mar to 09:03 on Thu 28 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/saubhagya-shayana-vrata", "festival": "saubhagya-shayana-vrata", "name": "Saubhāgya Śayana Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 492, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-03-27T12:37:28+08:00", "utc": "1963-03-27T04:37:28Z", "ms": -213564151590.10245 }, "end": { "local": "1963-03-28T09:02:47+08:00", "utc": "1963-03-28T01:02:47Z", "ms": -213490633232.77277 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-27T12:37:28+08:00", "utc": "1963-03-27T04:37:28Z", "ms": -213564151590.10245 }, "end": { "local": "1963-03-28T09:02:47+08:00", "utc": "1963-03-28T01:02:47Z", "ms": -213490633232.77277 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-03-27", "window": { "start": { "local": "1963-03-27T12:45:40+08:00", "utc": "1963-03-27T04:45:40Z", "ms": -213563659506.3517 }, "end": { "local": "1963-03-27T13:33:40+08:00", "utc": "1963-03-27T05:33:40Z", "ms": -213560779506.3517 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-03-28", "window": { "start": { "local": "1963-03-28T12:45:22+08:00", "utc": "1963-03-28T04:45:22Z", "ms": -213477277645.13174 }, "end": { "local": "1963-03-28T13:33:22+08:00", "utc": "1963-03-28T05:33:22Z", "ms": -213474397645.13174 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 12:37 on Wed 27 Mar to 09:03 on Thu 28 Mar.", "fact": "1963-03-27T04:37:28Z → 1963-03-28T01:02:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 27th, 12:45–13:33 on the 28th.", "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 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 492 s" }, { "step": "ruling", "text": "Saubhāgya Śayana Vrata, Chengdu, 1963: Wednesday 27 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": "1963-03-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-27", "confidence": "determinate" } ], "quote": "In Chengdu, Saubhāgya Śayana Vrata 1963 falls on Wednesday 27 March. Tṛtīyā runs from 12:37 on Wed 27 Mar to 09:03 on Thu 28 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-03-28", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13356, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-03-28T09:02:47+08:00", "utc": "1963-03-28T01:02:47Z", "ms": -213490633232.77277 }, "end": { "local": "1963-03-29T05:49:42+08:00", "utc": "1963-03-28T21:49:42Z", "ms": -213415817626.1196 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-28T09:02:47+08:00", "utc": "1963-03-28T01:02:47Z", "ms": -213490633232.77277 }, "end": { "local": "1963-03-29T05:49:42+08:00", "utc": "1963-03-28T21:49:42Z", "ms": -213415817626.1196 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-03-28", "window": { "start": { "local": "1963-03-28T12:45:22+08:00", "utc": "1963-03-28T04:45:22Z", "ms": -213477277645.13174 }, "end": { "local": "1963-03-28T13:33:22+08:00", "utc": "1963-03-28T05:33:22Z", "ms": -213474397645.13174 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-03-29", "window": { "start": { "local": "1963-03-29T12:45:04+08:00", "utc": "1963-03-29T04:45:04Z", "ms": -213390895784.44916 }, "end": { "local": "1963-03-29T13:33:04+08:00", "utc": "1963-03-29T05:33:04Z", "ms": -213388015784.44916 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 09:03 on Thu 28 Mar to 05:50 on Fri 29 Mar.", "fact": "1963-03-28T01:02:47Z → 1963-03-28T21:49:42Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:45–13:33 on the 28th, 12:45–13:33 on the 29th.", "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 28th and 0 of 48 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 13356 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Thursday 28 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": "1963-03-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-28", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Thursday 28 March. Caturthī runs from 09:03 on Thu 28 Mar to 05:50 on Fri 29 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-03-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/lakshmi-panchami", "festival": "lakshmi-panchami", "name": "Lakṣmī Pañcamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-03-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24922, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1963-03-29T05:49:42+08:00", "utc": "1963-03-28T21:49:42Z", "ms": -213415817626.1196 }, "end": { "local": "1963-03-30T03:07:14+08:00", "utc": "1963-03-29T19:07:14Z", "ms": -213339165815.3554 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-29T05:49:42+08:00", "utc": "1963-03-28T21:49:42Z", "ms": -213415817626.1196 }, "end": { "local": "1963-03-30T03:07:14+08:00", "utc": "1963-03-29T19:07:14Z", "ms": -213339165815.3554 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-03-29", "window": { "start": { "local": "1963-03-29T12:45:04+08:00", "utc": "1963-03-29T04:45:04Z", "ms": -213390895784.44916 }, "end": { "local": "1963-03-29T13:33:04+08:00", "utc": "1963-03-29T05:33:04Z", "ms": -213388015784.44916 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-03-30", "window": { "start": { "local": "1963-03-30T12:44:46+08:00", "utc": "1963-03-30T04:44:46Z", "ms": -213304513907.57596 }, "end": { "local": "1963-03-30T13:32:46+08:00", "utc": "1963-03-30T05:32:46Z", "ms": -213301633907.57596 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 05:50 on Fri 29 Mar to 03:07 on Sat 30 Mar.", "fact": "1963-03-28T21:49:42Z → 1963-03-29T19:07:14Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:45–13:33 on the 29th, 12:45–13:33 on the 30th.", "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 29th and 0 of 48 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 24922 s" }, { "step": "ruling", "text": "Lakṣmī Pañcamī, Chengdu, 1963: Friday 29 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": "1963-03-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-03-29", "confidence": "determinate" } ], "quote": "In Chengdu, Lakṣmī Pañcamī 1963 falls on Friday 29 March. Pañcamī runs from 05:50 on Fri 29 Mar to 03:07 on Sat 30 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/bhavani-utpatti", "festival": "bhavani-utpatti", "name": "Bhavānī Utpatti", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34093, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-03-31T23:39:37+08:00", "utc": "1963-03-31T15:39:37Z", "ms": -213178822983.05185 }, "end": { "local": "1963-04-01T23:00:23+08:00", "utc": "1963-04-01T15:00:23Z", "ms": -213094777174.76443 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-03-31T23:39:37+08:00", "utc": "1963-03-31T15:39:37Z", "ms": -213178822983.05185 }, "end": { "local": "1963-04-01T23:00:23+08:00", "utc": "1963-04-01T15:00:23Z", "ms": -213094777174.76443 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-03-31", "window": { "start": { "local": "1963-03-31T12:44:28+08:00", "utc": "1963-03-31T04:44:28Z", "ms": -213218131996.67877 }, "end": { "local": "1963-03-31T13:32:28+08:00", "utc": "1963-03-31T05:32:28Z", "ms": -213215251996.67877 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-04-01", "window": { "start": { "local": "1963-04-01T12:44:10+08:00", "utc": "1963-04-01T04:44:10Z", "ms": -213131750032.886 }, "end": { "local": "1963-04-01T13:32:10+08:00", "utc": "1963-04-01T05:32:10Z", "ms": -213128870032.886 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 23:40 on Sun 31 Mar to 23:00 on Mon 1 Apr.", "fact": "1963-03-31T15:39:37Z → 1963-04-01T15:00:23Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:44–13:32 on the 31st, 12:44–13:32 on the 1st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 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. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 34093 s" }, { "step": "ruling", "text": "Bhavānī Utpatti, Chengdu, 1963: Monday 1 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "bhavani-utpatti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 8 Annapurna puja (Beng.) (paraviddha), Bhavani-utpatti (paraviddha), Asokastami (Special when combined with naks. Punarvasu and Wednesday, after mid-day)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-04-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-01", "confidence": "determinate" } ], "quote": "In Chengdu, Bhavānī Utpatti 1963 falls on Monday 1 April. Aṣṭamī runs from 23:40 on Sun 31 Mar to 23:00 on Mon 1 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/rama-navami", "festival": "rama-navami", "name": "Rāma Navamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34093, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1963-04-01T23:00:23+08:00", "utc": "1963-04-01T15:00:23Z", "ms": -213094777174.76443 }, "end": { "local": "1963-04-02T23:03:04+08:00", "utc": "1963-04-02T15:03:04Z", "ms": -213008215734.6366 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-04-01T23:00:23+08:00", "utc": "1963-04-01T15:00:23Z", "ms": -213094777174.76443 }, "end": { "local": "1963-04-02T23:03:04+08:00", "utc": "1963-04-02T15:03:04Z", "ms": -213008215734.6366 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-04-01", "window": { "start": { "local": "1963-04-01T12:44:10+08:00", "utc": "1963-04-01T04:44:10Z", "ms": -213131750032.886 }, "end": { "local": "1963-04-01T13:32:10+08:00", "utc": "1963-04-01T05:32:10Z", "ms": -213128870032.886 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-04-02", "window": { "start": { "local": "1963-04-02T12:43:52+08:00", "utc": "1963-04-02T04:43:52Z", "ms": -213045367996.47028 }, "end": { "local": "1963-04-02T13:31:52+08:00", "utc": "1963-04-02T05:31:52Z", "ms": -213042487996.47028 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 23:00 on Mon 1 Apr to 23:03 on Tue 2 Apr.", "fact": "1963-04-01T15:00:23Z → 1963-04-02T15:03:04Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:44–13:32 on the 1st, 12:44–13:32 on the 2nd.", "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 1st and 48 of 48 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 34093 s" }, { "step": "ruling", "text": "Rāma Navamī, Chengdu, 1963: Tuesday 2 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rama-navami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 9 Ramanavami (madhyahnavyapini, special with Punarvasu naks.), Rama jayanti." } ], "not_evaluated": "The row calls the day special when it falls with Punarvasu nakṣatra; the nakṣatra is not tested.", "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-04-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-02", "confidence": "determinate" } ], "quote": "In Chengdu, Rāma Navamī 1963 falls on Tuesday 2 April. Navamī runs from 23:00 on Mon 1 Apr to 23:03 on Tue 2 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-04-04", "festival": "ekadashi", "name": "Kāmadā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21247, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-04-03T23:43:26+08:00", "utc": "1963-04-03T15:43:26Z", "ms": -212919393776.95474 }, "end": { "local": "1963-04-05T00:55:28+08:00", "utc": "1963-04-04T16:55:28Z", "ms": -212828671641.51132 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-04-03T23:43:26+08:00", "utc": "1963-04-03T15:43:26Z", "ms": -212919393776.95474 }, "end": { "local": "1963-04-05T00:55:28+08:00", "utc": "1963-04-04T16:55:28Z", "ms": -212828671641.51132 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-04-04", "window": { "start": { "local": "1963-04-04T06:50:48+08:00", "utc": "1963-04-03T22:50:48Z", "ms": -212893751572.91437 }, "end": { "local": "1963-04-04T06:50:48+08:00", "utc": "1963-04-03T22:50:48Z", "ms": -212893751572.91437 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-04-05", "window": { "start": { "local": "1963-04-05T06:49:36+08:00", "utc": "1963-04-04T22:49:36Z", "ms": -212807424342.21097 }, "end": { "local": "1963-04-05T06:49:36+08:00", "utc": "1963-04-04T22:49:36Z", "ms": -212807424342.21097 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 23:43 on Wed 3 Apr to 00:55 on Fri 5 Apr.", "fact": "1963-04-03T15:43:26Z → 1963-04-04T16:55:28Z" }, { "step": "kaala", "text": "Sunrise is at 06:51 on the 4th and 06:50 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 21247 s" }, { "step": "ruling", "text": "Kāmadā Ekādaśī, Chengdu, 1963: Thursday 4 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": "1963-04-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-04", "confidence": "determinate" } ], "quote": "In Chengdu, Kāmadā Ekādaśī 1963 falls on Thursday 4 April. Ekādaśī runs from 23:43 on Wed 3 Apr to 00:55 on Fri 5 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-04-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ananga-trayodashi", "festival": "ananga-trayodashi", "name": "Anaṅga Trayodaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29638, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-04-06T02:32:33+08:00", "utc": "1963-04-05T18:32:33Z", "ms": -212736447140.72552 }, "end": { "local": "1963-04-07T04:28:26+08:00", "utc": "1963-04-06T20:28:26Z", "ms": -212643094356.7477 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-04-06T02:32:33+08:00", "utc": "1963-04-05T18:32:33Z", "ms": -212736447140.72552 }, "end": { "local": "1963-04-07T04:28:26+08:00", "utc": "1963-04-06T20:28:26Z", "ms": -212643094356.7477 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-04-06", "window": { "start": { "local": "1963-04-06T12:42:41+08:00", "utc": "1963-04-06T04:42:41Z", "ms": -212699838711.79474 }, "end": { "local": "1963-04-06T13:30:41+08:00", "utc": "1963-04-06T05:30:41Z", "ms": -212696958711.79474 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-04-07", "window": { "start": { "local": "1963-04-07T12:42:24+08:00", "utc": "1963-04-07T04:42:24Z", "ms": -212613456000.51025 }, "end": { "local": "1963-04-07T13:30:24+08:00", "utc": "1963-04-07T05:30:24Z", "ms": -212610576000.51025 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:33 on Sat 6 Apr to 04:28 on Sun 7 Apr.", "fact": "1963-04-05T18:32:33Z → 1963-04-06T20:28:26Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:43–13:31 on the 6th, 12:42–13:30 on the 7th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 6th and 0 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 29638 s" }, { "step": "ruling", "text": "Anaṅga Trayodaśī, Chengdu, 1963: Saturday 6 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ananga-trayodashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 13 Ananga trayodasi (purvaviddha), Mahavira jayanti (Jain)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-04-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-06", "confidence": "determinate" } ], "quote": "In Chengdu, Anaṅga Trayodaśī 1963 falls on Saturday 6 April. Trayodaśī runs from 02:33 on Sat 6 Apr to 04:28 on Sun 7 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/pradosha-vrata?on=1963-04-06", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20219, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-04-06T02:32:33+08:00", "utc": "1963-04-05T18:32:33Z", "ms": -212736447140.72552 }, "end": { "local": "1963-04-07T04:28:26+08:00", "utc": "1963-04-06T20:28:26Z", "ms": -212643094356.7477 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-04-06T02:32:33+08:00", "utc": "1963-04-05T18:32:33Z", "ms": -212736447140.72552 }, "end": { "local": "1963-04-07T04:28:26+08:00", "utc": "1963-04-06T20:28:26Z", "ms": -212643094356.7477 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-04-05", "window": { "start": { "local": "1963-04-05T19:24:22+08:00", "utc": "1963-04-05T11:24:22Z", "ms": -212762138149.4993 }, "end": { "local": "1963-04-05T20:55:34+08:00", "utc": "1963-04-05T12:55:34Z", "ms": -212756665971.6242 } }, "covered_min": 0, "window_min": 91, "qualifies": false }, { "local_date": "1963-04-06", "window": { "start": { "local": "1963-04-06T19:24:59+08:00", "utc": "1963-04-06T11:24:59Z", "ms": -212675700608.15332 }, "end": { "local": "1963-04-06T20:55:57+08:00", "utc": "1963-04-06T12:55:57Z", "ms": -212670243055.44824 } }, "covered_min": 91, "window_min": 91, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:33 on Sat 6 Apr to 04:28 on Sun 7 Apr.", "fact": "1963-04-05T18:32:33Z → 1963-04-06T20:28:26Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:24–20:56 on the 5th, 19:25–20:56 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 91 minutes on the 5th and 91 of 91 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 20219 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Saturday 6 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": "1963-04-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-06", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Saturday 6 April. Trayodaśī runs from 02:33 on Sat 6 Apr to 04:28 on Sun 7 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-04-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/vishnu-damanaka-chaturdashi", "festival": "vishnu-damanaka-chaturdashi", "name": "Viṣṇudamanaka Caturdaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21854, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-04-07T04:28:26+08:00", "utc": "1963-04-06T20:28:26Z", "ms": -212643094356.7477 }, "end": { "local": "1963-04-08T06:37:52+08:00", "utc": "1963-04-07T22:37:52Z", "ms": -212548927536.6803 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-04-07T04:28:26+08:00", "utc": "1963-04-06T20:28:26Z", "ms": -212643094356.7477 }, "end": { "local": "1963-04-08T06:37:52+08:00", "utc": "1963-04-07T22:37:52Z", "ms": -212548927536.6803 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-04-07", "window": { "start": { "local": "1963-04-07T12:42:24+08:00", "utc": "1963-04-07T04:42:24Z", "ms": -212613456000.51025 }, "end": { "local": "1963-04-07T13:30:24+08:00", "utc": "1963-04-07T05:30:24Z", "ms": -212610576000.51025 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-04-08", "window": { "start": { "local": "1963-04-08T12:42:07+08:00", "utc": "1963-04-08T04:42:07Z", "ms": -212527073090.91125 }, "end": { "local": "1963-04-08T13:30:07+08:00", "utc": "1963-04-08T05:30:07Z", "ms": -212524193090.91125 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 04:28 on Sun 7 Apr to 06:38 on Mon 8 Apr.", "fact": "1963-04-06T20:28:26Z → 1963-04-07T22:37:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 7th, 12:42–13:30 on the 8th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 7th and 0 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 21854 s" }, { "step": "ruling", "text": "Viṣṇudamanaka Caturdaśī, Chengdu, 1963: Sunday 7 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vishnu-damanaka-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 14 Madanabhanji, (Bengal & Orissa) (paraviddha), Sivadamanaka caturdasi, Visnudamanaka caturdasi (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-04-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-07", "confidence": "determinate" } ], "quote": "In Chengdu, Viṣṇudamanaka Caturdaśī 1963 falls on Sunday 7 April. Caturdaśī runs from 04:28 on Sun 7 Apr to 06:38 on Mon 8 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/chaitri-purnima", "festival": "chaitri-purnima", "name": "Caitrī Pūrṇimā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13509, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-04-08T06:37:52+08:00", "utc": "1963-04-07T22:37:52Z", "ms": -212548927536.6803 }, "end": { "local": "1963-04-09T08:56:41+08:00", "utc": "1963-04-09T00:56:41Z", "ms": -212454198690.75565 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1963-04-08T06:37:52+08:00", "utc": "1963-04-07T22:37:52Z", "ms": -212548927536.6803 }, "end": { "local": "1963-04-09T08:56:41+08:00", "utc": "1963-04-09T00:56:41Z", "ms": -212454198690.75565 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-04-08", "window": { "start": { "local": "1963-04-08T12:42:07+08:00", "utc": "1963-04-08T04:42:07Z", "ms": -212527073090.91125 }, "end": { "local": "1963-04-08T13:30:07+08:00", "utc": "1963-04-08T05:30:07Z", "ms": -212524193090.91125 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-04-09", "window": { "start": { "local": "1963-04-09T12:41:50+08:00", "utc": "1963-04-09T04:41:50Z", "ms": -212440689962.1045 }, "end": { "local": "1963-04-09T13:29:50+08:00", "utc": "1963-04-09T05:29:50Z", "ms": -212437809962.1045 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 06:38 on Mon 8 Apr to 08:57 on Tue 9 Apr.", "fact": "1963-04-07T22:37:52Z → 1963-04-09T00:56:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 8th, 12:42–13:30 on the 9th.", "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 8th and 0 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 13509 s" }, { "step": "ruling", "text": "Caitrī Pūrṇimā, Chengdu, 1963: Monday 8 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "chaitri-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Caitri purnima (paraviddha), Hanumat jayanti, Oli ending (Jain)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-04-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-08", "confidence": "determinate" } ], "quote": "In Chengdu, Caitrī Pūrṇimā 1963 falls on Monday 8 April. Pūrṇimā runs from 06:38 on Mon 8 Apr to 08:57 on Tue 9 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-04-12", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17574, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-04-12T16:11:01+08:00", "utc": "1963-04-12T08:11:01Z", "ms": -212168938877.99545 }, "end": { "local": "1963-04-13T18:24:47+08:00", "utc": "1963-04-13T10:24:47Z", "ms": -212074513361.62445 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-12T16:11:01+08:00", "utc": "1963-04-12T08:11:01Z", "ms": -212168938877.99545 }, "end": { "local": "1963-04-13T18:24:47+08:00", "utc": "1963-04-13T10:24:47Z", "ms": -212074513361.62445 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-04-12", "window": { "start": { "local": "1963-04-12T22:23:30+08:00", "utc": "1963-04-12T14:23:30Z", "ms": -212146590196.0848 }, "end": { "local": "1963-04-12T22:23:30+08:00", "utc": "1963-04-12T14:23:30Z", "ms": -212146590196.0848 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-04-13", "window": { "start": { "local": "1963-04-13T23:17:40+08:00", "utc": "1963-04-13T15:17:40Z", "ms": -212056939516.22998 }, "end": { "local": "1963-04-13T23:17:40+08:00", "utc": "1963-04-13T15:17:40Z", "ms": -212056939516.22998 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 16:11 on Fri 12 Apr to 18:25 on Sat 13 Apr.", "fact": "1963-04-12T08:11:01Z → 1963-04-13T10:24:47Z" }, { "step": "kaala", "text": "Moonrise is at 22:23 on the 12th and 23:18 on the 13th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 12th and is not on the 13th.", "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 17574 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Friday 12 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": "1963-04-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-12", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Friday 12 April. Caturthī runs from 16:11 on Fri 12 Apr to 18:25 on Sat 13 Apr and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-04-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/vaishakhi", "festival": "vaishakhi", "name": "Vaiśākhī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5434, "anga": { "type": "sankranti", "index": 0, "key": "mesha", "name": "Meṣa", "start": { "local": "1963-04-14T08:09:32+08:00", "utc": "1963-04-14T00:09:32Z", "ms": -212025028195.565 }, "end": { "local": "1963-05-15T05:03:32+08:00", "utc": "1963-05-14T21:03:32Z", "ms": -209357787607.53253 } }, "span": { "of": "transit", "start": { "local": "1963-04-14T08:09:32+08:00", "utc": "1963-04-14T00:09:32Z", "ms": -212025028195.565 }, "end": { "local": "1963-04-14T08:09:32+08:00", "utc": "1963-04-14T00:09:32Z", "ms": -212025028195.565 } }, "kaala": "day", "days": [ { "local_date": "1963-04-13", "window": { "start": { "local": "1963-04-13T06:40:07+08:00", "utc": "1963-04-12T22:40:07Z", "ms": -212116793348.08044 }, "end": { "local": "1963-04-14T06:38:58+08:00", "utc": "1963-04-13T22:38:58Z", "ms": -212030462388.75815 } }, "covered_min": 0, "window_min": 1439, "qualifies": false }, { "local_date": "1963-04-14", "window": { "start": { "local": "1963-04-14T06:38:58+08:00", "utc": "1963-04-13T22:38:58Z", "ms": -212030462388.75815 }, "end": { "local": "1963-04-15T06:37:49+08:00", "utc": "1963-04-14T22:37:49Z", "ms": -211944130869.47165 } }, "covered_min": 1, "window_min": 1439, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Meṣa at 08:10 on Sun 14 Apr.", "fact": "1963-04-14T00:09:32Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 06:40 on the 13th, and from 06:39 on the 14th.", "fact": "day: sunrise-to-sunrise · sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from sunrise. The transit falls on the 14th, not the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunrise → only-day · margin 5434 s" }, { "step": "ruling", "text": "Vaiśākhī, Chengdu, 1963: Sunday 14 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "vaishakhi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Mesadi — Cadaka puja (Bengal), Bahag Bihu (Assam), Cheiraoba (Manipur), Visu (T. C. State), Vaisakhi (on the samkramana day commencing from sunrise)." }, { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } ], "not_evaluated": "The other names in the row (Cadaka puja, Bahag Bihu, Cheiraoba, Visu) are regional observances and wait with the regional rows.", "rashi": "Meṣa", "day_from": "sunrise" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-04-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1963-04-14", "statement": "Counted from midnight", "reference": { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } }, { "kind": "reckoning", "id": "sunset-rule", "local_date": "1963-04-14", "statement": "Past sunset, the next day (the Tamil rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } } ], "quote": "In Chengdu, Vaiśākhī 1963 falls on Sunday 14 April. The Sun enters Meṣa at 08:10 on Sun 14 Apr, and the rule counts the day from sunrise.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-04-20", "festival": "ekadashi", "name": "Varūthinī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35283, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-04-19T20:44:13+08:00", "utc": "1963-04-19T12:44:13Z", "ms": -211547746789.94705 }, "end": { "local": "1963-04-20T18:30:22+08:00", "utc": "1963-04-20T10:30:22Z", "ms": -211469377913.4364 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-19T20:44:13+08:00", "utc": "1963-04-19T12:44:13Z", "ms": -211547746789.94705 }, "end": { "local": "1963-04-20T18:30:22+08:00", "utc": "1963-04-20T10:30:22Z", "ms": -211469377913.4364 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-04-20", "window": { "start": { "local": "1963-04-20T06:32:16+08:00", "utc": "1963-04-19T22:32:16Z", "ms": -211512463896.4978 }, "end": { "local": "1963-04-20T06:32:16+08:00", "utc": "1963-04-19T22:32:16Z", "ms": -211512463896.4978 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-04-21", "window": { "start": { "local": "1963-04-21T06:31:12+08:00", "utc": "1963-04-20T22:31:12Z", "ms": -211426128438.71817 }, "end": { "local": "1963-04-21T06:31:12+08:00", "utc": "1963-04-20T22:31:12Z", "ms": -211426128438.71817 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 20:44 on Fri 19 Apr to 18:30 on Sat 20 Apr.", "fact": "1963-04-19T12:44:13Z → 1963-04-20T10:30:22Z" }, { "step": "kaala", "text": "Sunrise is at 06:32 on the 20th and 06:31 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 35283 s" }, { "step": "ruling", "text": "Varūthinī Ekādaśī, Chengdu, 1963: Saturday 20 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": "1963-04-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-20", "confidence": "determinate" } ], "quote": "In Chengdu, Varūthinī Ekādaśī 1963 falls on Saturday 20 April. Ekādaśī runs from 20:44 on Fri 19 Apr to 18:30 on Sat 20 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-04-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-04-21", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14276, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-04-21T15:36:36+08:00", "utc": "1963-04-21T07:36:36Z", "ms": -211393403906.2874 }, "end": { "local": "1963-04-22T12:11:26+08:00", "utc": "1963-04-22T04:11:26Z", "ms": -211319313863.2465 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-21T15:36:36+08:00", "utc": "1963-04-21T07:36:36Z", "ms": -211393403906.2874 }, "end": { "local": "1963-04-22T12:11:26+08:00", "utc": "1963-04-22T04:11:26Z", "ms": -211319313863.2465 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-04-21", "window": { "start": { "local": "1963-04-21T19:34:32+08:00", "utc": "1963-04-21T11:34:32Z", "ms": -211379128227.4931 }, "end": { "local": "1963-04-21T21:01:57+08:00", "utc": "1963-04-21T13:01:57Z", "ms": -211373883428.42368 } }, "covered_min": 87, "window_min": 87, "qualifies": true }, { "local_date": "1963-04-22", "window": { "start": { "local": "1963-04-22T19:35:11+08:00", "utc": "1963-04-22T11:35:11Z", "ms": -211292689146.83206 }, "end": { "local": "1963-04-22T21:02:22+08:00", "utc": "1963-04-22T13:02:22Z", "ms": -211287457962.03754 } }, "covered_min": 0, "window_min": 87, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 15:37 on Sun 21 Apr to 12:11 on Mon 22 Apr.", "fact": "1963-04-21T07:36:36Z → 1963-04-22T04:11:26Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:35–21:02 on the 21st, 19:35–21:02 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 87 of 87 minutes on the 21st and 0 of 87 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 14276 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Sunday 21 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": "1963-04-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-21", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Sunday 21 April. Trayodaśī runs from 15:37 on Sun 21 Apr to 12:11 on Mon 22 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-04-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-04-22", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25136, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-04-22T12:11:26+08:00", "utc": "1963-04-22T04:11:26Z", "ms": -211319313863.2465 }, "end": { "local": "1963-04-23T08:25:04+08:00", "utc": "1963-04-23T00:25:04Z", "ms": -211246496286.47748 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-22T12:11:26+08:00", "utc": "1963-04-22T04:11:26Z", "ms": -211319313863.2465 }, "end": { "local": "1963-04-23T08:25:04+08:00", "utc": "1963-04-23T00:25:04Z", "ms": -211246496286.47748 } }, "kaala": "nishita", "days": [ { "local_date": "1963-04-21", "window": { "start": { "local": "1963-04-22T00:38:20+08:00", "utc": "1963-04-21T16:38:20Z", "ms": -211360900230.9828 }, "end": { "local": "1963-04-22T01:26:20+08:00", "utc": "1963-04-21T17:26:20Z", "ms": -211358020230.9828 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-04-22", "window": { "start": { "local": "1963-04-23T00:38:08+08:00", "utc": "1963-04-22T16:38:08Z", "ms": -211274512203.85254 }, "end": { "local": "1963-04-23T01:26:08+08:00", "utc": "1963-04-22T17:26:08Z", "ms": -211271632203.85254 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 12:11 on Mon 22 Apr to 08:25 on Tue 23 Apr.", "fact": "1963-04-22T04:11:26Z → 1963-04-23T00:25:04Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:38–01:26 on the 21st, 00:38–01:26 on the 22nd.", "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 21st and 48 of 48 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25136 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Monday 22 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": "1963-04-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-22", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Monday 22 April. Caturdaśī runs from 12:11 on Mon 22 Apr to 08:25 on Tue 23 Apr and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-04-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/parashurama-jayanti", "festival": "parashurama-jayanti", "name": "Paraśurāma Jayantī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 696, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-04-25T20:52:03+08:00", "utc": "1963-04-25T12:52:03Z", "ms": -211028876788.75095 }, "end": { "local": "1963-04-26T17:34:14+08:00", "utc": "1963-04-26T09:34:14Z", "ms": -210954346473.64264 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-25T20:52:03+08:00", "utc": "1963-04-25T12:52:03Z", "ms": -211028876788.75095 }, "end": { "local": "1963-04-26T17:34:14+08:00", "utc": "1963-04-26T09:34:14Z", "ms": -210954346473.64264 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-04-25", "window": { "start": { "local": "1963-04-25T19:37:09+08:00", "utc": "1963-04-25T11:37:09Z", "ms": -211033371229.1642 }, "end": { "local": "1963-04-25T21:03:40+08:00", "utc": "1963-04-25T13:03:40Z", "ms": -211028180333.09302 } }, "covered_min": 12, "window_min": 87, "qualifies": true }, { "local_date": "1963-04-26", "window": { "start": { "local": "1963-04-26T19:37:48+08:00", "utc": "1963-04-26T11:37:48Z", "ms": -210946931726.70523 }, "end": { "local": "1963-04-26T21:04:06+08:00", "utc": "1963-04-26T13:04:06Z", "ms": -210941754062.22458 } }, "covered_min": 0, "window_min": 86, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 20:52 on Thu 25 Apr to 17:34 on Fri 26 Apr.", "fact": "1963-04-25T12:52:03Z → 1963-04-26T09:34:14Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:37–21:04 on the 25th, 19:38–21:04 on the 26th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pradoṣa. It covers 12 of 87 minutes on the 25th and 0 of 86 on the 26th.", "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 696 s" }, { "step": "ruling", "text": "Paraśurāma Jayantī, Chengdu, 1963: Thursday 25 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": "1963-04-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-25", "confidence": "determinate" } ], "quote": "In Chengdu, Paraśurāma Jayantī 1963 falls on Thursday 25 April. Tṛtīyā runs from 20:52 on Thu 25 Apr to 17:34 on Fri 26 Apr and covers 12 of 87 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/akshaya-tritiya", "festival": "akshaya-tritiya", "name": "Akṣaya Tṛtīyā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24257, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-04-25T20:52:03+08:00", "utc": "1963-04-25T12:52:03Z", "ms": -211028876788.75095 }, "end": { "local": "1963-04-26T17:34:14+08:00", "utc": "1963-04-26T09:34:14Z", "ms": -210954346473.64264 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-25T20:52:03+08:00", "utc": "1963-04-25T12:52:03Z", "ms": -211028876788.75095 }, "end": { "local": "1963-04-26T17:34:14+08:00", "utc": "1963-04-26T09:34:14Z", "ms": -210954346473.64264 } }, "kaala": "purvahna", "days": [ { "local_date": "1963-04-25", "window": { "start": { "local": "1963-04-25T06:27:01+08:00", "utc": "1963-04-24T22:27:01Z", "ms": -211080778919.084 }, "end": { "local": "1963-04-25T10:50:24+08:00", "utc": "1963-04-25T02:50:24Z", "ms": -211064976355.7774 } }, "covered_min": 0, "window_min": 263, "qualifies": false }, { "local_date": "1963-04-26", "window": { "start": { "local": "1963-04-26T06:26:00+08:00", "utc": "1963-04-25T22:26:00Z", "ms": -210994439508.63022 }, "end": { "local": "1963-04-26T10:49:56+08:00", "utc": "1963-04-26T02:49:56Z", "ms": -210978603581.3219 } }, "covered_min": 264, "window_min": 264, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 20:52 on Thu 25 Apr to 17:34 on Fri 26 Apr.", "fact": "1963-04-25T12:52:03Z → 1963-04-26T09:34:14Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:27–10:50 on the 25th, 06:26–10:50 on the 26th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pūrvāhṇa. It covers 0 of 263 minutes on the 25th and 264 of 264 on the 26th.", "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 24257 s" }, { "step": "ruling", "text": "Akṣaya Tṛtīyā, Chengdu, 1963: Friday 26 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": "1963-04-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-26", "confidence": "determinate" } ], "quote": "In Chengdu, Akṣaya Tṛtīyā 1963 falls on Friday 26 April. Tṛtīyā runs from 20:52 on Thu 25 Apr to 17:34 on Fri 26 Apr and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-04-27", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5057, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-04-26T17:34:14+08:00", "utc": "1963-04-26T09:34:14Z", "ms": -210954346473.64264 }, "end": { "local": "1963-04-27T14:50:02+08:00", "utc": "1963-04-27T06:50:02Z", "ms": -210877798245.2884 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-26T17:34:14+08:00", "utc": "1963-04-26T09:34:14Z", "ms": -210954346473.64264 }, "end": { "local": "1963-04-27T14:50:02+08:00", "utc": "1963-04-27T06:50:02Z", "ms": -210877798245.2884 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-04-26", "window": { "start": { "local": "1963-04-26T12:37:54+08:00", "utc": "1963-04-26T04:37:54Z", "ms": -210972125617.66772 }, "end": { "local": "1963-04-26T13:25:54+08:00", "utc": "1963-04-26T05:25:54Z", "ms": -210969245617.66772 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-04-27", "window": { "start": { "local": "1963-04-27T12:37:44+08:00", "utc": "1963-04-27T04:37:44Z", "ms": -210885735692.4861 }, "end": { "local": "1963-04-27T13:25:44+08:00", "utc": "1963-04-27T05:25:44Z", "ms": -210882855692.4861 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:34 on Fri 26 Apr to 14:50 on Sat 27 Apr.", "fact": "1963-04-26T09:34:14Z → 1963-04-27T06:50:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:38–13:26 on the 26th, 12:38–13:26 on the 27th.", "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 26th and 48 of 48 on the 27th.", "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 5057 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Saturday 27 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": "1963-04-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-27", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Saturday 27 April. Caturthī runs from 17:34 on Fri 26 Apr to 14:50 on Sat 27 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-04-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shankara-jayanti", "festival": "shankara-jayanti", "name": "Śaṅkara Jayantī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 582, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1963-04-27T14:50:02+08:00", "utc": "1963-04-27T06:50:02Z", "ms": -210877798245.2884 }, "end": { "local": "1963-04-28T12:47:16+08:00", "utc": "1963-04-28T04:47:16Z", "ms": -210798763752.62686 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-27T14:50:02+08:00", "utc": "1963-04-27T06:50:02Z", "ms": -210877798245.2884 }, "end": { "local": "1963-04-28T12:47:16+08:00", "utc": "1963-04-28T04:47:16Z", "ms": -210798763752.62686 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-04-27", "window": { "start": { "local": "1963-04-27T12:37:44+08:00", "utc": "1963-04-27T04:37:44Z", "ms": -210885735692.4861 }, "end": { "local": "1963-04-27T13:25:44+08:00", "utc": "1963-04-27T05:25:44Z", "ms": -210882855692.4861 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-04-28", "window": { "start": { "local": "1963-04-28T12:37:35+08:00", "utc": "1963-04-28T04:37:35Z", "ms": -210799345292.00055 }, "end": { "local": "1963-04-28T13:25:35+08:00", "utc": "1963-04-28T05:25:35Z", "ms": -210796465292.00055 } }, "covered_min": 10, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 14:50 on Sat 27 Apr to 12:47 on Sun 28 Apr.", "fact": "1963-04-27T06:50:02Z → 1963-04-28T04:47:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:38–13:26 on the 27th, 12:38–13:26 on the 28th.", "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 27th and 10 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: unstated → only-day · margin 582 s" }, { "step": "ruling", "text": "Śaṅkara Jayantī, Chengdu, 1963: Sunday 28 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": "1963-04-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-28", "confidence": "determinate" } ], "quote": "In Chengdu, Śaṅkara Jayantī 1963 falls on Sunday 28 April. Pañcamī runs from 14:50 on Sat 27 Apr to 12:47 on Sun 28 Apr and covers 10 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/gangotpatti", "festival": "gangotpatti", "name": "Gaṅgotpatti", "everyday": "Ganga Saptami", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-04-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3977, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1963-04-29T11:31:08+08:00", "utc": "1963-04-29T03:31:08Z", "ms": -210716931893.40088 }, "end": { "local": "1963-04-30T11:03:32+08:00", "utc": "1963-04-30T03:03:32Z", "ms": -210632188094.01862 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-04-29T11:31:08+08:00", "utc": "1963-04-29T03:31:08Z", "ms": -210716931893.40088 }, "end": { "local": "1963-04-30T11:03:32+08:00", "utc": "1963-04-30T03:03:32Z", "ms": -210632188094.01862 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-04-29", "window": { "start": { "local": "1963-04-29T12:37:26+08:00", "utc": "1963-04-29T04:37:26Z", "ms": -210712954408.90085 }, "end": { "local": "1963-04-29T13:25:26+08:00", "utc": "1963-04-29T05:25:26Z", "ms": -210710074408.90085 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-04-30", "window": { "start": { "local": "1963-04-30T12:37:17+08:00", "utc": "1963-04-30T04:37:17Z", "ms": -210626563035.2348 }, "end": { "local": "1963-04-30T13:25:17+08:00", "utc": "1963-04-30T05:25:17Z", "ms": -210623683035.2348 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 11:31 on Mon 29 Apr to 11:04 on Tue 30 Apr.", "fact": "1963-04-29T03:31:08Z → 1963-04-30T03:03:32Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 29th, 12:37–13:25 on the 30th.", "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 29th and 0 of 48 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 3977 s" }, { "step": "ruling", "text": "Gaṅgotpatti, Chengdu, 1963: Monday 29 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": "1963-04-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-04-29", "confidence": "determinate" } ], "quote": "In Chengdu, Gaṅgotpatti (Ganga Saptami) 1963 falls on Monday 29 April. Saptamī runs from 11:31 on Mon 29 Apr to 11:04 on Tue 30 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-05-04", "festival": "ekadashi", "name": "Mohinī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27546, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-05-03T13:58:28+08:00", "utc": "1963-05-03T05:58:28Z", "ms": -210362492364.68433 }, "end": { "local": "1963-05-04T15:58:06+08:00", "utc": "1963-05-04T07:58:06Z", "ms": -210268913601.45578 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-03T13:58:28+08:00", "utc": "1963-05-03T05:58:28Z", "ms": -210362492364.68433 }, "end": { "local": "1963-05-04T15:58:06+08:00", "utc": "1963-05-04T07:58:06Z", "ms": -210268913601.45578 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-05-03", "window": { "start": { "local": "1963-05-03T06:19:22+08:00", "utc": "1963-05-02T22:19:22Z", "ms": -210390038377.58035 }, "end": { "local": "1963-05-03T06:19:22+08:00", "utc": "1963-05-02T22:19:22Z", "ms": -210390038377.58035 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-05-04", "window": { "start": { "local": "1963-05-04T06:18:29+08:00", "utc": "1963-05-03T22:18:29Z", "ms": -210303691458.07907 }, "end": { "local": "1963-05-04T06:18:29+08:00", "utc": "1963-05-03T22:18:29Z", "ms": -210303691458.07907 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:58 on Fri 3 May to 15:58 on Sat 4 May.", "fact": "1963-05-03T05:58:28Z → 1963-05-04T07:58:06Z" }, { "step": "kaala", "text": "Sunrise is at 06:19 on the 3rd and 06:18 on the 4th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 3rd and is on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 27546 s" }, { "step": "ruling", "text": "Mohinī Ekādaśī, Chengdu, 1963: Saturday 4 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": "1963-05-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-04", "confidence": "determinate" } ], "quote": "In Chengdu, Mohinī Ekādaśī 1963 falls on Saturday 4 May. Ekādaśī runs from 13:58 on Fri 3 May to 15:58 on Sat 4 May and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-05-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/parashurama-dvadashi", "festival": "parashurama-dvadashi", "name": "Paraśurāma Dvādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9199, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1963-05-04T15:58:06+08:00", "utc": "1963-05-04T07:58:06Z", "ms": -210268913601.45578 }, "end": { "local": "1963-05-05T18:13:33+08:00", "utc": "1963-05-05T10:13:33Z", "ms": -210174387100.50317 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-04T15:58:06+08:00", "utc": "1963-05-04T07:58:06Z", "ms": -210268913601.45578 }, "end": { "local": "1963-05-05T18:13:33+08:00", "utc": "1963-05-05T10:13:33Z", "ms": -210174387100.50317 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-04", "window": { "start": { "local": "1963-05-04T12:36:48+08:00", "utc": "1963-05-04T04:36:48Z", "ms": -210280992465.6062 }, "end": { "local": "1963-05-04T13:24:48+08:00", "utc": "1963-05-04T05:24:48Z", "ms": -210278112465.6062 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-05-05", "window": { "start": { "local": "1963-05-05T12:36:41+08:00", "utc": "1963-05-05T04:36:41Z", "ms": -210194598512.33868 }, "end": { "local": "1963-05-05T13:24:41+08:00", "utc": "1963-05-05T05:24:41Z", "ms": -210191718512.33868 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 15:58 on Sat 4 May to 18:14 on Sun 5 May.", "fact": "1963-05-04T07:58:06Z → 1963-05-05T10:13:33Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 4th, 12:37–13:25 on the 5th.", "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 4th and 48 of 48 on the 5th.", "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 9199 s" }, { "step": "ruling", "text": "Paraśurāma Dvādaśī, Chengdu, 1963: Sunday 5 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "parashurama-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Parasurama dvadasi (purvaviddha), Rukmini dvadasi (purvaviddha)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-05", "confidence": "determinate" } ], "quote": "In Chengdu, Paraśurāma Dvādaśī 1963 falls on Sunday 5 May. Dvādaśī runs from 15:58 on Sat 4 May to 18:14 on Sun 5 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/rukmini-dvadashi", "festival": "rukmini-dvadashi", "name": "Rukmiṇī Dvādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9199, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1963-05-04T15:58:06+08:00", "utc": "1963-05-04T07:58:06Z", "ms": -210268913601.45578 }, "end": { "local": "1963-05-05T18:13:33+08:00", "utc": "1963-05-05T10:13:33Z", "ms": -210174387100.50317 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-04T15:58:06+08:00", "utc": "1963-05-04T07:58:06Z", "ms": -210268913601.45578 }, "end": { "local": "1963-05-05T18:13:33+08:00", "utc": "1963-05-05T10:13:33Z", "ms": -210174387100.50317 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-04", "window": { "start": { "local": "1963-05-04T12:36:48+08:00", "utc": "1963-05-04T04:36:48Z", "ms": -210280992465.6062 }, "end": { "local": "1963-05-04T13:24:48+08:00", "utc": "1963-05-04T05:24:48Z", "ms": -210278112465.6062 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-05-05", "window": { "start": { "local": "1963-05-05T12:36:41+08:00", "utc": "1963-05-05T04:36:41Z", "ms": -210194598512.33868 }, "end": { "local": "1963-05-05T13:24:41+08:00", "utc": "1963-05-05T05:24:41Z", "ms": -210191718512.33868 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 15:58 on Sat 4 May to 18:14 on Sun 5 May.", "fact": "1963-05-04T07:58:06Z → 1963-05-05T10:13:33Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 4th, 12:37–13:25 on the 5th.", "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 4th and 48 of 48 on the 5th.", "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 9199 s" }, { "step": "ruling", "text": "Rukmiṇī Dvādaśī, Chengdu, 1963: Sunday 5 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rukmini-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Parasurama dvadasi (purvaviddha), Rukmini dvadasi (purvaviddha)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-05", "confidence": "determinate" } ], "quote": "In Chengdu, Rukmiṇī Dvādaśī 1963 falls on Sunday 5 May. Dvādaśī runs from 15:58 on Sat 4 May to 18:14 on Sun 5 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/pradosha-vrata?on=1963-05-05", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-05", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 1907, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-05-05T18:13:33+08:00", "utc": "1963-05-05T10:13:33Z", "ms": -210174387100.50317 }, "end": { "local": "1963-05-06T20:36:52+08:00", "utc": "1963-05-06T12:36:52Z", "ms": -210079388225.87607 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-05T18:13:33+08:00", "utc": "1963-05-05T10:13:33Z", "ms": -210174387100.50317 }, "end": { "local": "1963-05-06T20:36:52+08:00", "utc": "1963-05-06T12:36:52Z", "ms": -210079388225.87607 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-05-05", "window": { "start": { "local": "1963-05-05T19:43:46+08:00", "utc": "1963-05-05T11:43:46Z", "ms": -210168973535.9136 }, "end": { "local": "1963-05-05T21:08:10+08:00", "utc": "1963-05-05T13:08:10Z", "ms": -210163909657.12885 } }, "covered_min": 84, "window_min": 84, "qualifies": true }, { "local_date": "1963-05-06", "window": { "start": { "local": "1963-05-06T19:44:26+08:00", "utc": "1963-05-06T11:44:26Z", "ms": -210082533592.4596 }, "end": { "local": "1963-05-06T21:08:38+08:00", "utc": "1963-05-06T13:08:38Z", "ms": -210077481687.13705 } }, "covered_min": 52, "window_min": 84, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 18:14 on Sun 5 May to 20:37 on Mon 6 May.", "fact": "1963-05-05T10:13:33Z → 1963-05-06T12:36:52Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:44–21:08 on the 5th, 19:44–21:09 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 84 of 84 minutes on the 5th and 52 of 84 on the 6th.", "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 1907 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Sunday 5 May.", "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": "1963-05-05", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-05", "confidence": "boundary" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Sunday 5 May. Trayodaśī runs from 18:14 on Sun 5 May to 20:37 on Mon 6 May and covers all of pradoṣa that evening. It also reaches the next evening for 52 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/chengdu/festivals/1963/pradosha-vrata?on=1963-05-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/nrisimha-chaturdashi", "festival": "nrisimha-chaturdashi", "name": "Nṛsiṃha Caturdaśī", "everyday": "Narasimha Jayanti", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1907, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-05-06T20:36:52+08:00", "utc": "1963-05-06T12:36:52Z", "ms": -210079388225.87607 }, "end": { "local": "1963-05-07T23:01:42+08:00", "utc": "1963-05-07T15:01:42Z", "ms": -209984297648.373 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-06T20:36:52+08:00", "utc": "1963-05-06T12:36:52Z", "ms": -210079388225.87607 }, "end": { "local": "1963-05-07T23:01:42+08:00", "utc": "1963-05-07T15:01:42Z", "ms": -209984297648.373 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-05-06", "window": { "start": { "local": "1963-05-06T19:44:26+08:00", "utc": "1963-05-06T11:44:26Z", "ms": -210082533592.4596 }, "end": { "local": "1963-05-06T21:08:38+08:00", "utc": "1963-05-06T13:08:38Z", "ms": -210077481687.13705 } }, "covered_min": 32, "window_min": 84, "qualifies": true }, { "local_date": "1963-05-07", "window": { "start": { "local": "1963-05-07T19:45:06+08:00", "utc": "1963-05-07T11:45:06Z", "ms": -209996093652.52365 }, "end": { "local": "1963-05-07T21:09:06+08:00", "utc": "1963-05-07T13:09:06Z", "ms": -209991053570.4914 } }, "covered_min": 84, "window_min": 84, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 20:37 on Mon 6 May to 23:02 on Tue 7 May.", "fact": "1963-05-06T12:36:52Z → 1963-05-07T15:01:42Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:44–21:09 on the 6th, 19:45–21:09 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 32 of 84 minutes on the 6th and 84 of 84 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both evenings qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 1907 s" }, { "step": "ruling", "text": "Nṛsiṃha Caturdaśī, Chengdu, 1963: Tuesday 7 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "nrisimha-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 14 Nrsimha caturdasi (pradosa vyapini — if it occurs on two successive days, the second day is to be observed, special when combined with naksatra 'Svati', yoga 'Siddhi' and 'Saturday')." } ], "not_evaluated": "The row calls the day special with Svātī nakṣatra, Siddhi yoga and a Saturday; none is tested.", "kaala": "pradosha", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-07", "confidence": "determinate" } ], "quote": "In Chengdu, Nṛsiṃha Caturdaśī (Narasimha Jayanti) 1963 falls on Tuesday 7 May. Caturdaśī runs from 20:37 on Mon 6 May to 23:02 on Tue 7 May and covers all of pradoṣa that evening. It also reaches the previous evening for 32 minutes; by the rule the second evening is taken.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/buddha-purnima", "festival": "buddha-purnima", "name": "Buddha Pūrṇimā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34631, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-05-07T23:01:42+08:00", "utc": "1963-05-07T15:01:42Z", "ms": -209984297648.373 }, "end": { "local": "1963-05-09T01:23:10+08:00", "utc": "1963-05-08T17:23:10Z", "ms": -209889410403.18015 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-07T23:01:42+08:00", "utc": "1963-05-07T15:01:42Z", "ms": -209984297648.373 }, "end": { "local": "1963-05-09T01:23:10+08:00", "utc": "1963-05-08T17:23:10Z", "ms": -209889410403.18015 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-07", "window": { "start": { "local": "1963-05-07T12:36:31+08:00", "utc": "1963-05-07T04:36:31Z", "ms": -210021808977.5321 }, "end": { "local": "1963-05-07T13:24:31+08:00", "utc": "1963-05-07T05:24:31Z", "ms": -210018928977.5321 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-05-08", "window": { "start": { "local": "1963-05-08T12:36:27+08:00", "utc": "1963-05-08T04:36:27Z", "ms": -209935413381.92786 }, "end": { "local": "1963-05-08T13:24:27+08:00", "utc": "1963-05-08T05:24:27Z", "ms": -209932533381.92786 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 23:02 on Tue 7 May to 01:23 on Thu 9 May.", "fact": "1963-05-07T15:01:42Z → 1963-05-08T17:23:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 7th, 12:36–13:24 on the 8th.", "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 7th and 48 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 34631 s" }, { "step": "ruling", "text": "Buddha Pūrṇimā, Chengdu, 1963: Wednesday 8 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "buddha-purnima", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Sampat gauri vrata (paraviddha), Phuladola (Bengal & Orissa) (paraviddha), Gandhesvari puja (Bengal) (purvaviddha), Buddha purnima, Vaisakhi purnima." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-08", "confidence": "determinate" } ], "quote": "In Chengdu, Buddha Pūrṇimā 1963 falls on Wednesday 8 May. Pūrṇimā runs from 23:02 on Tue 7 May to 01:23 on Thu 9 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sampat-gauri-vrata", "festival": "sampat-gauri-vrata", "name": "Sampat Gaurī Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34631, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-05-07T23:01:42+08:00", "utc": "1963-05-07T15:01:42Z", "ms": -209984297648.373 }, "end": { "local": "1963-05-09T01:23:10+08:00", "utc": "1963-05-08T17:23:10Z", "ms": -209889410403.18015 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-07T23:01:42+08:00", "utc": "1963-05-07T15:01:42Z", "ms": -209984297648.373 }, "end": { "local": "1963-05-09T01:23:10+08:00", "utc": "1963-05-08T17:23:10Z", "ms": -209889410403.18015 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-07", "window": { "start": { "local": "1963-05-07T12:36:31+08:00", "utc": "1963-05-07T04:36:31Z", "ms": -210021808977.5321 }, "end": { "local": "1963-05-07T13:24:31+08:00", "utc": "1963-05-07T05:24:31Z", "ms": -210018928977.5321 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-05-08", "window": { "start": { "local": "1963-05-08T12:36:27+08:00", "utc": "1963-05-08T04:36:27Z", "ms": -209935413381.92786 }, "end": { "local": "1963-05-08T13:24:27+08:00", "utc": "1963-05-08T05:24:27Z", "ms": -209932533381.92786 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 23:02 on Tue 7 May to 01:23 on Thu 9 May.", "fact": "1963-05-07T15:01:42Z → 1963-05-08T17:23:10Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 7th, 12:36–13:24 on the 8th.", "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 7th and 48 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 34631 s" }, { "step": "ruling", "text": "Sampat Gaurī Vrata, Chengdu, 1963: Wednesday 8 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sampat-gauri-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Sampat gauri vrata (paraviddha), Phuladola (Bengal & Orissa) (paraviddha), Gandhesvari puja (Bengal) (purvaviddha), Buddha purnima, Vaisakhi purnima." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-08", "confidence": "determinate" } ], "quote": "In Chengdu, Sampat Gaurī Vrata 1963 falls on Wednesday 8 May. Pūrṇimā runs from 23:02 on Tue 7 May to 01:23 on Thu 9 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-05-12", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33498, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-05-12T07:26:08+08:00", "utc": "1963-05-11T23:26:08Z", "ms": -209608431576.4538 }, "end": { "local": "1963-05-13T08:51:12+08:00", "utc": "1963-05-13T00:51:12Z", "ms": -209516928489.413 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-12T07:26:08+08:00", "utc": "1963-05-11T23:26:08Z", "ms": -209608431576.4538 }, "end": { "local": "1963-05-13T08:51:12+08:00", "utc": "1963-05-13T00:51:12Z", "ms": -209516928489.413 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-05-11", "window": { "start": { "local": "1963-05-11T22:07:50+08:00", "utc": "1963-05-11T14:07:50Z", "ms": -209641929577.1732 }, "end": { "local": "1963-05-11T22:07:50+08:00", "utc": "1963-05-11T14:07:50Z", "ms": -209641929577.1732 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-05-12", "window": { "start": { "local": "1963-05-12T23:01:32+08:00", "utc": "1963-05-12T15:01:32Z", "ms": -209552307694.77707 }, "end": { "local": "1963-05-12T23:01:32+08:00", "utc": "1963-05-12T15:01:32Z", "ms": -209552307694.77707 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 07:26 on Sun 12 May to 08:51 on Mon 13 May.", "fact": "1963-05-11T23:26:08Z → 1963-05-13T00:51:12Z" }, { "step": "kaala", "text": "Moonrise is at 22:08 on the 11th and 23:02 on the 12th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 11th and is on the 12th.", "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 33498 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Sunday 12 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": "1963-05-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-12", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Sunday 12 May. Caturthī runs from 07:26 on Sun 12 May to 08:51 on Mon 13 May and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-05-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-05-19", "festival": "ekadashi", "name": "Aparā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3545, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-05-19T05:08:26+08:00", "utc": "1963-05-18T21:08:26Z", "ms": -209011893720.39694 }, "end": { "local": "1963-05-20T02:17:24+08:00", "utc": "1963-05-19T18:17:24Z", "ms": -208935755969.08575 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-19T05:08:26+08:00", "utc": "1963-05-18T21:08:26Z", "ms": -209011893720.39694 }, "end": { "local": "1963-05-20T02:17:24+08:00", "utc": "1963-05-19T18:17:24Z", "ms": -208935755969.08575 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-05-19", "window": { "start": { "local": "1963-05-19T06:07:31+08:00", "utc": "1963-05-18T22:07:31Z", "ms": -209008348626.56937 }, "end": { "local": "1963-05-19T06:07:31+08:00", "utc": "1963-05-18T22:07:31Z", "ms": -209008348626.56937 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-05-20", "window": { "start": { "local": "1963-05-20T06:06:58+08:00", "utc": "1963-05-19T22:06:58Z", "ms": -208921982211.72427 }, "end": { "local": "1963-05-20T06:06:58+08:00", "utc": "1963-05-19T22:06:58Z", "ms": -208921982211.72427 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 05:08 on Sun 19 May to 02:17 on Mon 20 May.", "fact": "1963-05-18T21:08:26Z → 1963-05-19T18:17:24Z" }, { "step": "kaala", "text": "Sunrise is at 06:08 on the 19th and 06:07 on the 20th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 19th and is not on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 3545 s" }, { "step": "ruling", "text": "Aparā Ekādaśī, Chengdu, 1963: Sunday 19 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": "1963-05-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-19", "confidence": "determinate" } ], "quote": "In Chengdu, Aparā Ekādaśī 1963 falls on Sunday 19 May. Ekādaśī runs from 05:08 on Sun 19 May to 02:17 on Mon 20 May and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-05-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-05-20", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-20", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 1825, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-05-20T22:59:33+08:00", "utc": "1963-05-20T14:59:33Z", "ms": -208861227115.06625 }, "end": { "local": "1963-05-21T19:23:52+08:00", "utc": "1963-05-21T11:23:52Z", "ms": -208787768016.05173 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-20T22:59:33+08:00", "utc": "1963-05-20T14:59:33Z", "ms": -208861227115.06625 }, "end": { "local": "1963-05-21T19:23:52+08:00", "utc": "1963-05-21T11:23:52Z", "ms": -208787768016.05173 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-05-20", "window": { "start": { "local": "1963-05-20T19:53:39+08:00", "utc": "1963-05-20T11:53:39Z", "ms": -208872380934.0942 }, "end": { "local": "1963-05-20T21:15:21+08:00", "utc": "1963-05-20T13:15:21Z", "ms": -208867478732.69223 } }, "covered_min": 0, "window_min": 82, "qualifies": false }, { "local_date": "1963-05-21", "window": { "start": { "local": "1963-05-21T19:54:17+08:00", "utc": "1963-05-21T11:54:17Z", "ms": -208785942655.27438 }, "end": { "local": "1963-05-21T21:15:50+08:00", "utc": "1963-05-21T13:15:50Z", "ms": -208781049668.2795 } }, "covered_min": 0, "window_min": 82, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 23:00 on Mon 20 May to 19:24 on Tue 21 May.", "fact": "1963-05-20T14:59:33Z → 1963-05-21T11:23:52Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:54–21:15 on the 20th, 19:54–21:16 on the 21st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 82 minutes on the 20th and 0 of 82 on the 21st.", "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 1825 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Monday 20 May.", "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": "1963-05-20", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-20", "confidence": "boundary" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Monday 20 May. Trayodaśī runs from 23:00 on Mon 20 May to 19:24 on Tue 21 May, and reaches pradoṣa on neither day.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-05-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-05-21", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18734, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-05-21T19:23:52+08:00", "utc": "1963-05-21T11:23:52Z", "ms": -208787768016.05173 }, "end": { "local": "1963-05-22T15:40:24+08:00", "utc": "1963-05-22T07:40:24Z", "ms": -208714775538.8434 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-21T19:23:52+08:00", "utc": "1963-05-21T11:23:52Z", "ms": -208787768016.05173 }, "end": { "local": "1963-05-22T15:40:24+08:00", "utc": "1963-05-22T07:40:24Z", "ms": -208714775538.8434 } }, "kaala": "nishita", "days": [ { "local_date": "1963-05-21", "window": { "start": { "local": "1963-05-22T00:36:06+08:00", "utc": "1963-05-21T16:36:06Z", "ms": -208769033954.04364 }, "end": { "local": "1963-05-22T01:24:06+08:00", "utc": "1963-05-21T17:24:06Z", "ms": -208766153954.04364 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-05-22", "window": { "start": { "local": "1963-05-23T00:36:10+08:00", "utc": "1963-05-22T16:36:10Z", "ms": -208682629681.50388 }, "end": { "local": "1963-05-23T01:24:10+08:00", "utc": "1963-05-22T17:24:10Z", "ms": -208679749681.50388 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 19:24 on Tue 21 May to 15:40 on Wed 22 May.", "fact": "1963-05-21T11:23:52Z → 1963-05-22T07:40:24Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:36–01:24 on the 21st, 00:36–01:24 on the 22nd.", "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 21st and 0 of 48 on the 22nd.", "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 18734 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Tuesday 21 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-21", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Tuesday 21 May. Caturdaśī runs from 19:24 on Tue 21 May to 15:40 on Wed 22 May and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-05-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/rambha-tritiya", "festival": "rambha-tritiya", "name": "Rambhā Tṛtīyā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25640, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-05-25T05:29:19+08:00", "utc": "1963-05-24T21:29:19Z", "ms": -208492240850.97452 }, "end": { "local": "1963-05-26T02:59:05+08:00", "utc": "1963-05-25T18:59:05Z", "ms": -208414855343.4343 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-25T05:29:19+08:00", "utc": "1963-05-24T21:29:19Z", "ms": -208492240850.97452 }, "end": { "local": "1963-05-26T02:59:05+08:00", "utc": "1963-05-25T18:59:05Z", "ms": -208414855343.4343 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-25", "window": { "start": { "local": "1963-05-25T12:36:39+08:00", "utc": "1963-05-25T04:36:39Z", "ms": -208466601101.6306 }, "end": { "local": "1963-05-25T13:24:39+08:00", "utc": "1963-05-25T05:24:39Z", "ms": -208463721101.6306 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-05-26", "window": { "start": { "local": "1963-05-26T12:36:45+08:00", "utc": "1963-05-26T04:36:45Z", "ms": -208380195489.04626 }, "end": { "local": "1963-05-26T13:24:45+08:00", "utc": "1963-05-26T05:24:45Z", "ms": -208377315489.04626 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 05:29 on Sat 25 May to 02:59 on Sun 26 May.", "fact": "1963-05-24T21:29:19Z → 1963-05-25T18:59:05Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 25th, 12:37–13:25 on the 26th.", "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 25th and 0 of 48 on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 25640 s" }, { "step": "ruling", "text": "Rambhā Tṛtīyā, Chengdu, 1963: Saturday 25 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "rambha-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 3 Rambha trtiya (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-25", "confidence": "determinate" } ], "quote": "In Chengdu, Rambhā Tṛtīyā 1963 falls on Saturday 25 May. Tṛtīyā runs from 05:29 on Sat 25 May to 02:59 on Sun 26 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-05-26", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34660, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-05-26T02:59:05+08:00", "utc": "1963-05-25T18:59:05Z", "ms": -208414855343.4343 }, "end": { "local": "1963-05-27T01:09:37+08:00", "utc": "1963-05-26T17:09:37Z", "ms": -208335022522.85217 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-26T02:59:05+08:00", "utc": "1963-05-25T18:59:05Z", "ms": -208414855343.4343 }, "end": { "local": "1963-05-27T01:09:37+08:00", "utc": "1963-05-26T17:09:37Z", "ms": -208335022522.85217 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-26", "window": { "start": { "local": "1963-05-26T12:36:45+08:00", "utc": "1963-05-26T04:36:45Z", "ms": -208380195489.04626 }, "end": { "local": "1963-05-26T13:24:45+08:00", "utc": "1963-05-26T05:24:45Z", "ms": -208377315489.04626 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-05-27", "window": { "start": { "local": "1963-05-27T12:36:51+08:00", "utc": "1963-05-27T04:36:51Z", "ms": -208293789405.25623 }, "end": { "local": "1963-05-27T13:24:51+08:00", "utc": "1963-05-27T05:24:51Z", "ms": -208290909405.25623 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:59 on Sun 26 May to 01:10 on Mon 27 May.", "fact": "1963-05-25T18:59:05Z → 1963-05-26T17:09:37Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 26th, 12:37–13:25 on the 27th.", "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 26th and 0 of 48 on the 27th.", "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 34660 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Sunday 26 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-26", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Sunday 26 May. Caturthī runs from 02:59 on Sun 26 May to 01:10 on Mon 27 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-05-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/aranya-gauri-vrata", "festival": "aranya-gauri-vrata", "name": "Araṇya Gaurī Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37580, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1963-05-28T00:06:17+08:00", "utc": "1963-05-27T16:06:17Z", "ms": -208252422829.06927 }, "end": { "local": "1963-05-28T23:51:17+08:00", "utc": "1963-05-28T15:51:17Z", "ms": -208166923138.29535 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-28T00:06:17+08:00", "utc": "1963-05-27T16:06:17Z", "ms": -208252422829.06927 }, "end": { "local": "1963-05-28T23:51:17+08:00", "utc": "1963-05-28T15:51:17Z", "ms": -208166923138.29535 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-27", "window": { "start": { "local": "1963-05-27T12:36:51+08:00", "utc": "1963-05-27T04:36:51Z", "ms": -208293789405.25623 }, "end": { "local": "1963-05-27T13:24:51+08:00", "utc": "1963-05-27T05:24:51Z", "ms": -208290909405.25623 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-05-28", "window": { "start": { "local": "1963-05-28T12:36:57+08:00", "utc": "1963-05-28T04:36:57Z", "ms": -208207382864.63428 }, "end": { "local": "1963-05-28T13:24:57+08:00", "utc": "1963-05-28T05:24:57Z", "ms": -208204502864.63428 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 00:06 on Tue 28 May to 23:51 on Tue 28 May.", "fact": "1963-05-27T16:06:17Z → 1963-05-28T15:51:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 27th, 12:37–13:25 on the 28th.", "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 27th and 48 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 37580 s" }, { "step": "ruling", "text": "Araṇya Gaurī Vrata, Chengdu, 1963: Tuesday 28 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "aranya-gauri-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Aranya sasthi, Aranya gauri vrata, (paraviddha), Skanda sasthi, (purvaviddha), Sitala sasthi yatra (Orissa)" } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-28", "confidence": "determinate" } ], "quote": "In Chengdu, Araṇya Gaurī Vrata 1963 falls on Tuesday 28 May. Ṣaṣṭhī runs from 00:06 on Tue 28 May to 23:51 on Tue 28 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/skanda-shashthi-jyaishtha", "festival": "skanda-shashthi-jyaishtha", "name": "Skanda Ṣaṣṭhī (Jyaiṣṭha)", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-05-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37580, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1963-05-28T00:06:17+08:00", "utc": "1963-05-27T16:06:17Z", "ms": -208252422829.06927 }, "end": { "local": "1963-05-28T23:51:17+08:00", "utc": "1963-05-28T15:51:17Z", "ms": -208166923138.29535 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-05-28T00:06:17+08:00", "utc": "1963-05-27T16:06:17Z", "ms": -208252422829.06927 }, "end": { "local": "1963-05-28T23:51:17+08:00", "utc": "1963-05-28T15:51:17Z", "ms": -208166923138.29535 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-05-27", "window": { "start": { "local": "1963-05-27T12:36:51+08:00", "utc": "1963-05-27T04:36:51Z", "ms": -208293789405.25623 }, "end": { "local": "1963-05-27T13:24:51+08:00", "utc": "1963-05-27T05:24:51Z", "ms": -208290909405.25623 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-05-28", "window": { "start": { "local": "1963-05-28T12:36:57+08:00", "utc": "1963-05-28T04:36:57Z", "ms": -208207382864.63428 }, "end": { "local": "1963-05-28T13:24:57+08:00", "utc": "1963-05-28T05:24:57Z", "ms": -208204502864.63428 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 00:06 on Tue 28 May to 23:51 on Tue 28 May.", "fact": "1963-05-27T16:06:17Z → 1963-05-28T15:51:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:37–13:25 on the 27th, 12:37–13:25 on the 28th.", "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 27th and 48 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: purvaviddha → only-day · margin 37580 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī (Jyaiṣṭha), Chengdu, 1963: Tuesday 28 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "skanda-shashthi-jyaishtha", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Aranya sasthi, Aranya gauri vrata, (paraviddha), Skanda sasthi, (purvaviddha), Sitala sasthi yatra (Orissa)" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-05-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-05-28", "confidence": "determinate" } ], "quote": "In Chengdu, Skanda Ṣaṣṭhī (Jyaiṣṭha) 1963 falls on Tuesday 28 May. Ṣaṣṭhī runs from 00:06 on Tue 28 May to 23:51 on Tue 28 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-06-03", "festival": "ekadashi", "name": "Nirjalā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1678, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-06-02T05:33:50+08:00", "utc": "1963-06-01T21:33:50Z", "ms": -207800769955.25314 }, "end": { "local": "1963-06-03T07:55:52+08:00", "utc": "1963-06-02T23:55:52Z", "ms": -207705848393.80392 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-02T05:33:50+08:00", "utc": "1963-06-01T21:33:50Z", "ms": -207800769955.25314 }, "end": { "local": "1963-06-03T07:55:52+08:00", "utc": "1963-06-02T23:55:52Z", "ms": -207705848393.80392 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-06-02", "window": { "start": { "local": "1963-06-02T06:01:48+08:00", "utc": "1963-06-01T22:01:48Z", "ms": -207799091523.17264 }, "end": { "local": "1963-06-02T06:01:48+08:00", "utc": "1963-06-01T22:01:48Z", "ms": -207799091523.17264 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-06-03", "window": { "start": { "local": "1963-06-03T06:01:35+08:00", "utc": "1963-06-02T22:01:35Z", "ms": -207712705356.94073 }, "end": { "local": "1963-06-03T06:01:35+08:00", "utc": "1963-06-02T22:01:35Z", "ms": -207712705356.94073 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 05:34 on Sun 2 Jun to 07:56 on Mon 3 Jun.", "fact": "1963-06-01T21:33:50Z → 1963-06-02T23:55:52Z" }, { "step": "kaala", "text": "Sunrise is at 06:02 on the 2nd and 06:02 on the 3rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī 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. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 1678 s" }, { "step": "ruling", "text": "Nirjalā Ekādaśī, Chengdu, 1963: Monday 3 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": "1963-06-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-03", "confidence": "determinate" } ], "quote": "In Chengdu, Nirjalā Ekādaśī 1963 falls on Monday 3 June. Ekādaśī runs from 05:34 on Sun 2 Jun to 07:56 on Mon 3 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-06-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shri-rama-dvadashi", "festival": "shri-rama-dvadashi", "name": "Śrī Rāma Dvādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8285, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1963-06-03T07:55:52+08:00", "utc": "1963-06-02T23:55:52Z", "ms": -207705848393.80392 }, "end": { "local": "1963-06-04T10:19:50+08:00", "utc": "1963-06-04T02:19:50Z", "ms": -207610810045.4359 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-03T07:55:52+08:00", "utc": "1963-06-02T23:55:52Z", "ms": -207705848393.80392 }, "end": { "local": "1963-06-04T10:19:50+08:00", "utc": "1963-06-04T02:19:50Z", "ms": -207610810045.4359 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-06-03", "window": { "start": { "local": "1963-06-03T12:37:45+08:00", "utc": "1963-06-03T04:37:45Z", "ms": -207688934799.8326 }, "end": { "local": "1963-06-03T13:25:45+08:00", "utc": "1963-06-03T05:25:45Z", "ms": -207686054799.8326 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-06-04", "window": { "start": { "local": "1963-06-04T12:37:55+08:00", "utc": "1963-06-04T04:37:55Z", "ms": -207602525448.5076 }, "end": { "local": "1963-06-04T13:25:55+08:00", "utc": "1963-06-04T05:25:55Z", "ms": -207599645448.5076 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 07:56 on Mon 3 Jun to 10:20 on Tue 4 Jun.", "fact": "1963-06-02T23:55:52Z → 1963-06-04T02:19:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:38–13:26 on the 3rd, 12:38–13:26 on the 4th.", "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 3rd and 0 of 48 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 8285 s" }, { "step": "ruling", "text": "Śrī Rāma Dvādaśī, Chengdu, 1963: Monday 3 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": "1963-06-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-03", "confidence": "determinate" } ], "quote": "In Chengdu, Śrī Rāma Dvādaśī 1963 falls on Monday 3 June. Dvādaśī runs from 07:56 on Mon 3 Jun to 10:20 on Tue 4 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/pradosha-vrata?on=1963-06-04", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26730, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-06-04T10:19:50+08:00", "utc": "1963-06-04T02:19:50Z", "ms": -207610810045.4359 }, "end": { "local": "1963-06-05T12:37:27+08:00", "utc": "1963-06-05T04:37:27Z", "ms": -207516152951.90985 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-04T10:19:50+08:00", "utc": "1963-06-04T02:19:50Z", "ms": -207610810045.4359 }, "end": { "local": "1963-06-05T12:37:27+08:00", "utc": "1963-06-05T04:37:27Z", "ms": -207516152951.90985 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-06-04", "window": { "start": { "local": "1963-06-04T20:02:27+08:00", "utc": "1963-06-04T12:02:27Z", "ms": -207575853143.37027 }, "end": { "local": "1963-06-04T21:22:17+08:00", "utc": "1963-06-04T13:22:17Z", "ms": -207571063219.39236 } }, "covered_min": 80, "window_min": 80, "qualifies": true }, { "local_date": "1963-06-05", "window": { "start": { "local": "1963-06-05T20:02:57+08:00", "utc": "1963-06-05T12:02:57Z", "ms": -207489422791.51648 }, "end": { "local": "1963-06-05T21:22:42+08:00", "utc": "1963-06-05T13:22:42Z", "ms": -207484638184.3566 } }, "covered_min": 0, "window_min": 80, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 10:20 on Tue 4 Jun to 12:37 on Wed 5 Jun.", "fact": "1963-06-04T02:19:50Z → 1963-06-05T04:37:27Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:02–21:22 on the 4th, 20:03–21:23 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 80 of 80 minutes on the 4th and 0 of 80 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 26730 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Tuesday 4 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": "1963-06-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-04", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Tuesday 4 June. Trayodaśī runs from 10:20 on Tue 4 Jun to 12:37 on Wed 5 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-06-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/vata-savitri-vrata", "festival": "vata-savitri-vrata", "name": "Vaṭa Sāvitrī Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 12800, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-06-06T14:42:30+08:00", "utc": "1963-06-06T06:42:30Z", "ms": -207422250238.20483 }, "end": { "local": "1963-06-07T16:30:35+08:00", "utc": "1963-06-07T08:30:35Z", "ms": -207329364756.22104 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-06T14:42:30+08:00", "utc": "1963-06-06T06:42:30Z", "ms": -207422250238.20483 }, "end": { "local": "1963-06-07T16:30:35+08:00", "utc": "1963-06-07T08:30:35Z", "ms": -207329364756.22104 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-06-06", "window": { "start": { "local": "1963-06-06T20:03:27+08:00", "utc": "1963-06-06T12:03:27Z", "ms": -207402993215.9965 }, "end": { "local": "1963-06-06T21:23:06+08:00", "utc": "1963-06-06T13:23:06Z", "ms": -207398213631.01767 } }, "covered_min": 80, "window_min": 80, "qualifies": true }, { "local_date": "1963-06-07", "window": { "start": { "local": "1963-06-07T20:03:56+08:00", "utc": "1963-06-07T12:03:56Z", "ms": -207316564445.2999 }, "end": { "local": "1963-06-07T21:23:30+08:00", "utc": "1963-06-07T13:23:30Z", "ms": -207311789584.48627 } }, "covered_min": 0, "window_min": 80, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 14:42 on Thu 6 Jun to 16:31 on Fri 7 Jun.", "fact": "1963-06-06T06:42:30Z → 1963-06-07T08:30:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:03–21:23 on the 6th, 20:04–21:24 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 80 of 80 minutes on the 6th and 0 of 80 on the 7th.", "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 12800 s" }, { "step": "ruling", "text": "Vaṭa Sāvitrī Vrata, Chengdu, 1963: Thursday 6 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": "1963-06-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-06", "confidence": "determinate" } ], "quote": "In Chengdu, Vaṭa Sāvitrī Vrata 1963 falls on Thursday 6 June. Pūrṇimā runs from 14:42 on Thu 6 Jun to 16:31 on Fri 7 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-06-10", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10551, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-06-10T19:45:06+08:00", "utc": "1963-06-10T11:45:06Z", "ms": -207058494188.6228 }, "end": { "local": "1963-06-11T19:59:09+08:00", "utc": "1963-06-11T11:59:09Z", "ms": -206971250857.73138 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-10T19:45:06+08:00", "utc": "1963-06-10T11:45:06Z", "ms": -207058494188.6228 }, "end": { "local": "1963-06-11T19:59:09+08:00", "utc": "1963-06-11T11:59:09Z", "ms": -206971250857.73138 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-06-10", "window": { "start": { "local": "1963-06-10T22:40:57+08:00", "utc": "1963-06-10T14:40:57Z", "ms": -207047943262.12207 }, "end": { "local": "1963-06-10T22:40:57+08:00", "utc": "1963-06-10T14:40:57Z", "ms": -207047943262.12207 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-06-11", "window": { "start": { "local": "1963-06-11T23:27:55+08:00", "utc": "1963-06-11T15:27:55Z", "ms": -206958724895.3903 }, "end": { "local": "1963-06-11T23:27:55+08:00", "utc": "1963-06-11T15:27:55Z", "ms": -206958724895.3903 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 19:45 on Mon 10 Jun to 19:59 on Tue 11 Jun.", "fact": "1963-06-10T11:45:06Z → 1963-06-11T11:59:09Z" }, { "step": "kaala", "text": "Moonrise is at 22:41 on the 10th and 23:28 on the 11th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 10th and is not on the 11th.", "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 10551 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Monday 10 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": "1963-06-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-10", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Monday 10 June. Caturthī runs from 19:45 on Mon 10 Jun to 19:59 on Tue 11 Jun and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-06-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-06-18", "festival": "ekadashi", "name": "Yoginī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7505, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-06-17T11:02:58+08:00", "utc": "1963-06-17T03:02:58Z", "ms": -206485022075.13535 }, "end": { "local": "1963-06-18T08:06:03+08:00", "utc": "1963-06-18T00:06:03Z", "ms": -206409237078.20416 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-17T11:02:58+08:00", "utc": "1963-06-17T03:02:58Z", "ms": -206485022075.13535 }, "end": { "local": "1963-06-18T08:06:03+08:00", "utc": "1963-06-18T00:06:03Z", "ms": -206409237078.20416 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-06-17", "window": { "start": { "local": "1963-06-17T06:00:50+08:00", "utc": "1963-06-16T22:00:50Z", "ms": -206503149645.91623 }, "end": { "local": "1963-06-17T06:00:50+08:00", "utc": "1963-06-16T22:00:50Z", "ms": -206503149645.91623 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-06-18", "window": { "start": { "local": "1963-06-18T06:00:58+08:00", "utc": "1963-06-17T22:00:58Z", "ms": -206416742441.90027 }, "end": { "local": "1963-06-18T06:00:58+08:00", "utc": "1963-06-17T22:00:58Z", "ms": -206416742441.90027 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 11:03 on Mon 17 Jun to 08:06 on Tue 18 Jun.", "fact": "1963-06-17T03:02:58Z → 1963-06-18T00:06:03Z" }, { "step": "kaala", "text": "Sunrise is at 06:01 on the 17th and 06:01 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 7505 s" }, { "step": "ruling", "text": "Yoginī Ekādaśī, Chengdu, 1963: Tuesday 18 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": "1963-06-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-18", "confidence": "determinate" } ], "quote": "In Chengdu, Yoginī Ekādaśī 1963 falls on Tuesday 18 June. Ekādaśī runs from 11:03 on Mon 17 Jun to 08:06 on Tue 18 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-06-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-06-19", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15496, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-06-19T04:57:41+08:00", "utc": "1963-06-18T20:57:41Z", "ms": -206334139011.3277 }, "end": { "local": "1963-06-20T01:45:46+08:00", "utc": "1963-06-19T17:45:46Z", "ms": -206259253914.4095 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-19T04:57:41+08:00", "utc": "1963-06-18T20:57:41Z", "ms": -206334139011.3277 }, "end": { "local": "1963-06-20T01:45:46+08:00", "utc": "1963-06-19T17:45:46Z", "ms": -206259253914.4095 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-06-18", "window": { "start": { "local": "1963-06-18T20:08:11+08:00", "utc": "1963-06-18T12:08:11Z", "ms": -206365909109.66156 }, "end": { "local": "1963-06-18T21:27:14+08:00", "utc": "1963-06-18T13:27:14Z", "ms": -206361165752.85715 } }, "covered_min": 0, "window_min": 79, "qualifies": false }, { "local_date": "1963-06-19", "window": { "start": { "local": "1963-06-19T20:08:28+08:00", "utc": "1963-06-19T12:08:28Z", "ms": -206279492196.10437 }, "end": { "local": "1963-06-19T21:27:30+08:00", "utc": "1963-06-19T13:27:30Z", "ms": -206274749789.33514 } }, "covered_min": 79, "window_min": 79, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:58 on Wed 19 Jun to 01:46 on Thu 20 Jun.", "fact": "1963-06-18T20:57:41Z → 1963-06-19T17:45:46Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:08–21:27 on the 18th, 20:08–21:28 on the 19th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 79 minutes on the 18th and 79 of 79 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15496 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Wednesday 19 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": "1963-06-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-19", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Wednesday 19 June. Trayodaśī runs from 04:58 on Wed 19 Jun to 01:46 on Thu 20 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-06-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-06-19", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-19", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 1014, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-06-20T01:45:46+08:00", "utc": "1963-06-19T17:45:46Z", "ms": -206259253914.4095 }, "end": { "local": "1963-06-20T22:38:51+08:00", "utc": "1963-06-20T14:38:51Z", "ms": -206184069350.03943 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-20T01:45:46+08:00", "utc": "1963-06-19T17:45:46Z", "ms": -206259253914.4095 }, "end": { "local": "1963-06-20T22:38:51+08:00", "utc": "1963-06-20T14:38:51Z", "ms": -206184069350.03943 } }, "kaala": "nishita", "days": [ { "local_date": "1963-06-19", "window": { "start": { "local": "1963-06-20T00:40:52+08:00", "utc": "1963-06-19T16:40:52Z", "ms": -206263148170.71982 }, "end": { "local": "1963-06-20T01:28:52+08:00", "utc": "1963-06-19T17:28:52Z", "ms": -206260268170.71982 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-06-20", "window": { "start": { "local": "1963-06-21T00:41:05+08:00", "utc": "1963-06-20T16:41:05Z", "ms": -206176734782.23257 }, "end": { "local": "1963-06-21T01:29:05+08:00", "utc": "1963-06-20T17:29:05Z", "ms": -206173854782.23257 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 01:46 on Thu 20 Jun to 22:39 on Thu 20 Jun.", "fact": "1963-06-19T17:45:46Z → 1963-06-20T14:38:51Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:41–01:29 on the 19th, 00:41–01:29 on the 20th.", "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 19th and 0 of 48 on the 20th.", "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 1014 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Wednesday 19 June.", "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": "1963-06-19", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-19", "confidence": "boundary" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Wednesday 19 June. Caturdaśī runs from 01:46 on Thu 20 Jun to 22:39 on Thu 20 Jun, and reaches niśītha on neither day.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-06-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/rathayatra", "festival": "rathayatra", "name": "Rathayātrā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6318, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1963-06-22T17:15:04+08:00", "utc": "1963-06-22T09:15:04Z", "ms": -206030695826.04773 }, "end": { "local": "1963-06-23T15:14:56+08:00", "utc": "1963-06-23T07:14:56Z", "ms": -205951503998.77124 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-22T17:15:04+08:00", "utc": "1963-06-22T09:15:04Z", "ms": -206030695826.04773 }, "end": { "local": "1963-06-23T15:14:56+08:00", "utc": "1963-06-23T07:14:56Z", "ms": -205951503998.77124 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-06-22", "window": { "start": { "local": "1963-06-22T12:41:25+08:00", "utc": "1963-06-22T04:41:25Z", "ms": -206047114742.4909 }, "end": { "local": "1963-06-22T13:29:25+08:00", "utc": "1963-06-22T05:29:25Z", "ms": -206044234742.4909 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-06-23", "window": { "start": { "local": "1963-06-23T12:41:38+08:00", "utc": "1963-06-23T04:41:38Z", "ms": -205960702002.2342 }, "end": { "local": "1963-06-23T13:29:38+08:00", "utc": "1963-06-23T05:29:38Z", "ms": -205957822002.2342 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 17:15 on Sat 22 Jun to 15:15 on Sun 23 Jun.", "fact": "1963-06-22T09:15:04Z → 1963-06-23T07:14:56Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:41–13:29 on the 22nd, 12:42–13:30 on the 23rd.", "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 22nd and 48 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 6318 s" }, { "step": "ruling", "text": "Rathayātrā, Chengdu, 1963: Sunday 23 June.", "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": "1963-06-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-23", "confidence": "determinate" } ], "quote": "In Chengdu, Rathayātrā 1963 falls on Sunday 23 June. Dvitīyā runs from 17:15 on Sat 22 Jun to 15:15 on Sun 23 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-06-25", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1107, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-06-24T13:52:09+08:00", "utc": "1963-06-24T05:52:09Z", "ms": -205870071407.19492 }, "end": { "local": "1963-06-25T13:11:37+08:00", "utc": "1963-06-25T05:11:37Z", "ms": -205786103350.54984 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-24T13:52:09+08:00", "utc": "1963-06-24T05:52:09Z", "ms": -205870071407.19492 }, "end": { "local": "1963-06-25T13:11:37+08:00", "utc": "1963-06-25T05:11:37Z", "ms": -205786103350.54984 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-06-24", "window": { "start": { "local": "1963-06-24T12:41:51+08:00", "utc": "1963-06-24T04:41:51Z", "ms": -205874289326.89575 }, "end": { "local": "1963-06-24T13:29:51+08:00", "utc": "1963-06-24T05:29:51Z", "ms": -205871409326.89575 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-06-25", "window": { "start": { "local": "1963-06-25T12:42:03+08:00", "utc": "1963-06-25T04:42:03Z", "ms": -205787876743.85782 }, "end": { "local": "1963-06-25T13:30:03+08:00", "utc": "1963-06-25T05:30:03Z", "ms": -205784996743.85782 } }, "covered_min": 30, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 13:52 on Mon 24 Jun to 13:12 on Tue 25 Jun.", "fact": "1963-06-24T05:52:09Z → 1963-06-25T05:11:37Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 24th, 12:42–13:30 on the 25th.", "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 24th and 30 of 48 on the 25th.", "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 1107 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Tuesday 25 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": "1963-06-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-25", "confidence": "boundary" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Tuesday 25 June. Caturthī runs from 13:52 on Mon 24 Jun to 13:12 on Tue 25 Jun and covers 30 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-06-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/skanda-panchami", "festival": "skanda-panchami", "name": "Skanda Pañcamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 882, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1963-06-25T13:11:37+08:00", "utc": "1963-06-25T05:11:37Z", "ms": -205786103350.54984 }, "end": { "local": "1963-06-26T13:15:34+08:00", "utc": "1963-06-26T05:15:34Z", "ms": -205699466066.85065 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-25T13:11:37+08:00", "utc": "1963-06-25T05:11:37Z", "ms": -205786103350.54984 }, "end": { "local": "1963-06-26T13:15:34+08:00", "utc": "1963-06-26T05:15:34Z", "ms": -205699466066.85065 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-06-25", "window": { "start": { "local": "1963-06-25T12:42:03+08:00", "utc": "1963-06-25T04:42:03Z", "ms": -205787876743.85782 }, "end": { "local": "1963-06-25T13:30:03+08:00", "utc": "1963-06-25T05:30:03Z", "ms": -205784996743.85782 } }, "covered_min": 18, "window_min": 48, "qualifies": true }, { "local_date": "1963-06-26", "window": { "start": { "local": "1963-06-26T12:42:16+08:00", "utc": "1963-06-26T04:42:16Z", "ms": -205701464279.24942 }, "end": { "local": "1963-06-26T13:30:16+08:00", "utc": "1963-06-26T05:30:16Z", "ms": -205698584279.24942 } }, "covered_min": 33, "window_min": 48, "qualifies": true } ], "decided_by": "paraviddha", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 13:12 on Tue 25 Jun to 13:16 on Wed 26 Jun.", "fact": "1963-06-25T05:11:37Z → 1963-06-26T05:15:34Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 25th, 12:42–13:30 on the 26th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 18 of 48 minutes on the 25th and 33 of 48 on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both middays qualify. Paraviddhā: the second is taken.", "fact": "priority: paraviddha → paraviddha · margin 882 s" }, { "step": "ruling", "text": "Skanda Pañcamī, Chengdu, 1963: Wednesday 26 June.", "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": "1963-06-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-26", "confidence": "determinate" } ], "quote": "In Chengdu, Skanda Pañcamī 1963 falls on Wednesday 26 June. Pañcamī runs from 13:12 on Tue 25 Jun to 13:16 on Wed 26 Jun and covers 33 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 18 minutes; by the rule the second midday is taken.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vivasvat-saptami", "festival": "vivasvat-saptami", "name": "Vivasvat Saptamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-06-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1944, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1963-06-27T14:02:52+08:00", "utc": "1963-06-27T06:02:52Z", "ms": -205610227541.00983 }, "end": { "local": "1963-06-28T15:28:40+08:00", "utc": "1963-06-28T07:28:40Z", "ms": -205518679504.21643 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-06-27T14:02:52+08:00", "utc": "1963-06-27T06:02:52Z", "ms": -205610227541.00983 }, "end": { "local": "1963-06-28T15:28:40+08:00", "utc": "1963-06-28T07:28:40Z", "ms": -205518679504.21643 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-06-27", "window": { "start": { "local": "1963-06-27T12:42:28+08:00", "utc": "1963-06-27T04:42:28Z", "ms": -205615051957.9803 }, "end": { "local": "1963-06-27T13:30:28+08:00", "utc": "1963-06-27T05:30:28Z", "ms": -205612171957.9803 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-06-28", "window": { "start": { "local": "1963-06-28T12:42:40+08:00", "utc": "1963-06-28T04:42:40Z", "ms": -205528639803.85522 }, "end": { "local": "1963-06-28T13:30:40+08:00", "utc": "1963-06-28T05:30:40Z", "ms": -205525759803.85522 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 14:03 on Thu 27 Jun to 15:29 on Fri 28 Jun.", "fact": "1963-06-27T06:02:52Z → 1963-06-28T07:28:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 27th, 12:43–13:31 on the 28th.", "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 27th and 48 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: purvaviddha → only-day · margin 1944 s" }, { "step": "ruling", "text": "Vivasvat Saptamī, Chengdu, 1963: Friday 28 June.", "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": "1963-06-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-06-27", "confidence": "determinate" } ], "quote": "In Chengdu, Vivasvat Saptamī 1963 falls on Friday 28 June. Saptamī runs from 14:03 on Thu 27 Jun to 15:29 on Fri 28 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-07-02", "festival": "ekadashi", "name": "Hariśayanī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20828, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-07-01T22:01:15+08:00", "utc": "1963-07-01T14:01:15Z", "ms": -205235925221.3904 }, "end": { "local": "1963-07-03T00:17:58+08:00", "utc": "1963-07-02T16:17:58Z", "ms": -205141321541.71527 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-07-01T22:01:15+08:00", "utc": "1963-07-01T14:01:15Z", "ms": -205235925221.3904 }, "end": { "local": "1963-07-03T00:17:58+08:00", "utc": "1963-07-02T16:17:58Z", "ms": -205141321541.71527 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-07-02", "window": { "start": { "local": "1963-07-02T06:04:43+08:00", "utc": "1963-07-01T22:04:43Z", "ms": -205206917167.8965 }, "end": { "local": "1963-07-02T06:04:43+08:00", "utc": "1963-07-01T22:04:43Z", "ms": -205206917167.8965 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-07-03", "window": { "start": { "local": "1963-07-03T06:05:07+08:00", "utc": "1963-07-02T22:05:07Z", "ms": -205120493340.7585 }, "end": { "local": "1963-07-03T06:05:07+08:00", "utc": "1963-07-02T22:05:07Z", "ms": -205120493340.7585 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 22:01 on Mon 1 Jul to 00:18 on Wed 3 Jul.", "fact": "1963-07-01T14:01:15Z → 1963-07-02T16:17:58Z" }, { "step": "kaala", "text": "Sunrise is at 06:05 on the 2nd and 06:05 on the 3rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 2nd and is not 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 20828 s" }, { "step": "ruling", "text": "Hariśayanī Ekādaśī, Chengdu, 1963: Tuesday 2 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": "1963-07-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-02", "confidence": "determinate" } ], "quote": "In Chengdu, Hariśayanī Ekādaśī 1963 falls on Tuesday 2 July. Ekādaśī runs from 22:01 on Mon 1 Jul to 00:18 on Wed 3 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-07-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-07-04", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17412, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-07-04T02:19:43+08:00", "utc": "1963-07-03T18:19:43Z", "ms": -205047616563.6693 }, "end": { "local": "1963-07-05T03:59:10+08:00", "utc": "1963-07-04T19:59:10Z", "ms": -204955250407.12753 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-07-04T02:19:43+08:00", "utc": "1963-07-03T18:19:43Z", "ms": -205047616563.6693 }, "end": { "local": "1963-07-05T03:59:10+08:00", "utc": "1963-07-04T19:59:10Z", "ms": -204955250407.12753 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-07-03", "window": { "start": { "local": "1963-07-03T20:10:09+08:00", "utc": "1963-07-03T12:10:09Z", "ms": -205069791276.10034 }, "end": { "local": "1963-07-03T21:29:32+08:00", "utc": "1963-07-03T13:29:32Z", "ms": -205065028257.6899 } }, "covered_min": 0, "window_min": 79, "qualifies": false }, { "local_date": "1963-07-04", "window": { "start": { "local": "1963-07-04T20:10:05+08:00", "utc": "1963-07-04T12:10:05Z", "ms": -204983394573.84866 }, "end": { "local": "1963-07-04T21:29:32+08:00", "utc": "1963-07-04T13:29:32Z", "ms": -204978627709.20377 } }, "covered_min": 79, "window_min": 79, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:20 on Thu 4 Jul to 03:59 on Fri 5 Jul.", "fact": "1963-07-03T18:19:43Z → 1963-07-04T19:59:10Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:10–21:30 on the 3rd, 20:10–21:30 on the 4th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 79 minutes on the 3rd and 79 of 79 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 17412 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Thursday 4 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": "1963-07-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-04", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Thursday 4 July. Trayodaśī runs from 02:20 on Thu 4 Jul to 03:59 on Fri 5 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-07-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/vyasa-puja", "festival": "vyasa-puja", "name": "Vyāsa Pūjā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 686, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 } }, "kaala": "udaya-3", "days": [ { "local_date": "1963-07-06", "window": { "start": { "local": "1963-07-06T06:06:23+08:00", "utc": "1963-07-05T22:06:23Z", "ms": -204861216722.8517 }, "end": { "local": "1963-07-06T08:55:06+08:00", "utc": "1963-07-06T00:55:06Z", "ms": -204851094491.23364 } }, "covered_min": 169, "window_min": 169, "qualifies": true }, { "local_date": "1963-07-07", "window": { "start": { "local": "1963-07-07T06:06:50+08:00", "utc": "1963-07-06T22:06:50Z", "ms": -204774789568.38986 }, "end": { "local": "1963-07-07T08:55:26+08:00", "utc": "1963-07-07T00:55:26Z", "ms": -204764674307.72504 } }, "covered_min": 0, "window_min": 169, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul.", "fact": "1963-07-05T21:11:45Z → 1963-07-06T21:55:24Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:06–08:55 on the 6th, 06:07–08:55 on the 7th.", "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 169 of 169 minutes on the 6th and 0 of 169 on the 7th.", "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 686 s" }, { "step": "ruling", "text": "Vyāsa Pūjā, Chengdu, 1963: Saturday 6 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": "1963-07-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-06", "confidence": "determinate" } ], "quote": "In Chengdu, Vyāsa Pūjā 1963 falls on Saturday 6 July. Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/guru-purnima", "festival": "guru-purnima", "name": "Guru Pūrṇimā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24535, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-07-06", "window": { "start": { "local": "1963-07-06T12:44:09+08:00", "utc": "1963-07-06T04:44:09Z", "ms": -204837351143.80652 }, "end": { "local": "1963-07-06T13:32:09+08:00", "utc": "1963-07-06T05:32:09Z", "ms": -204834471143.80652 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-07-07", "window": { "start": { "local": "1963-07-07T12:44:19+08:00", "utc": "1963-07-07T04:44:19Z", "ms": -204750941416.72784 }, "end": { "local": "1963-07-07T13:32:19+08:00", "utc": "1963-07-07T05:32:19Z", "ms": -204748061416.72784 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul.", "fact": "1963-07-05T21:11:45Z → 1963-07-06T21:55:24Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:44–13:32 on the 6th, 12:44–13:32 on the 7th.", "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 6th and 0 of 48 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 24535 s" }, { "step": "ruling", "text": "Guru Pūrṇimā, Chengdu, 1963: Saturday 6 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": "1963-07-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-06", "confidence": "determinate" } ], "quote": "In Chengdu, Guru Pūrṇimā 1963 falls on Saturday 6 July. Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/kokila-vrata", "festival": "kokila-vrata", "name": "Kokilā Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32504, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 } }, "kaala": "sayahna", "days": [ { "local_date": "1963-07-05", "window": { "start": { "local": "1963-07-05T17:21:12+08:00", "utc": "1963-07-05T09:21:12Z", "ms": -204907128086.0405 }, "end": { "local": "1963-07-05T20:10:01+08:00", "utc": "1963-07-05T12:10:01Z", "ms": -204896999335.2976 } }, "covered_min": 0, "window_min": 169, "qualifies": false }, { "local_date": "1963-07-06", "window": { "start": { "local": "1963-07-06T17:21:12+08:00", "utc": "1963-07-06T09:21:12Z", "ms": -204820727796.37943 }, "end": { "local": "1963-07-06T20:09:54+08:00", "utc": "1963-07-06T12:09:54Z", "ms": -204810605564.76135 } }, "covered_min": 169, "window_min": 169, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul.", "fact": "1963-07-05T21:11:45Z → 1963-07-06T21:55:24Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 17:21–20:10 on the 5th, 17:21–20:10 on the 6th.", "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 169 minutes on the 5th and 169 of 169 on the 6th.", "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 32504 s" }, { "step": "ruling", "text": "Kokilā Vrata, Chengdu, 1963: Saturday 6 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": "1963-07-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-06", "confidence": "determinate" } ], "quote": "In Chengdu, Kokilā Vrata 1963 falls on Saturday 6 July. Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/shiva-shayanotsava", "festival": "shiva-shayanotsava", "name": "Śiva Śayanotsava", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27733, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1963-07-06T05:11:45+08:00", "utc": "1963-07-05T21:11:45Z", "ms": -204864495447.95636 }, "end": { "local": "1963-07-07T05:55:24+08:00", "utc": "1963-07-06T21:55:24Z", "ms": -204775476015.29388 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-07-05", "window": { "start": { "local": "1963-07-05T20:10:01+08:00", "utc": "1963-07-05T12:10:01Z", "ms": -204896999335.2976 }, "end": { "local": "1963-07-05T21:29:32+08:00", "utc": "1963-07-05T13:29:32Z", "ms": -204892228320.3048 } }, "covered_min": 0, "window_min": 80, "qualifies": false }, { "local_date": "1963-07-06", "window": { "start": { "local": "1963-07-06T20:09:54+08:00", "utc": "1963-07-06T12:09:54Z", "ms": -204810605564.76135 }, "end": { "local": "1963-07-06T21:29:30+08:00", "utc": "1963-07-06T13:29:30Z", "ms": -204805830098.5785 } }, "covered_min": 80, "window_min": 80, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul.", "fact": "1963-07-05T21:11:45Z → 1963-07-06T21:55:24Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:10–21:30 on the 5th, 20:10–21:29 on the 6th.", "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 80 minutes on the 5th and 80 of 80 on the 6th.", "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 27733 s" }, { "step": "ruling", "text": "Śiva Śayanotsava, Chengdu, 1963: Saturday 6 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": "1963-07-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-06", "confidence": "determinate" } ], "quote": "In Chengdu, Śiva Śayanotsava 1963 falls on Saturday 6 July. Pūrṇimā runs from 05:12 on Sat 6 Jul to 05:55 on Sun 7 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ashunya-shayana-vrata-ashadha", "festival": "ashunya-shayana-vrata-ashadha", "name": "Aśūnya Śayana Vrata (Āṣāḍha)", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30652, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1963-07-08T06:09:57+08:00", "utc": "1963-07-07T22:09:57Z", "ms": -204688203133.3942 }, "end": { "local": "1963-07-09T05:56:28+08:00", "utc": "1963-07-08T21:56:28Z", "ms": -204602611680.0288 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-08T06:09:57+08:00", "utc": "1963-07-07T22:09:57Z", "ms": -204688203133.3942 }, "end": { "local": "1963-07-09T05:56:28+08:00", "utc": "1963-07-08T21:56:28Z", "ms": -204602611680.0288 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-07-07", "window": { "start": { "local": "1963-07-07T20:36:35+08:00", "utc": "1963-07-07T12:36:35Z", "ms": -204722605104.3063 }, "end": { "local": "1963-07-07T20:36:35+08:00", "utc": "1963-07-07T12:36:35Z", "ms": -204722605104.3063 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-07-08", "window": { "start": { "local": "1963-07-08T21:25:37+08:00", "utc": "1963-07-08T13:25:37Z", "ms": -204633263481.06137 }, "end": { "local": "1963-07-08T21:25:37+08:00", "utc": "1963-07-08T13:25:37Z", "ms": -204633263481.06137 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 06:10 on Mon 8 Jul to 05:56 on Tue 9 Jul.", "fact": "1963-07-07T22:09:57Z → 1963-07-08T21:56:28Z" }, { "step": "kaala", "text": "Moonrise is at 20:37 on the 7th and 21:26 on the 8th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā must be current at moonrise. It is not on the 7th and is on the 8th.", "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 30652 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata (Āṣāḍha), Chengdu, 1963: Monday 8 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": "1963-07-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-08", "confidence": "determinate" } ], "quote": "In Chengdu, Aśūnya Śayana Vrata (Āṣāḍha) 1963 falls on Monday 8 July. Dvitīyā runs from 06:10 on Mon 8 Jul to 05:56 on Tue 9 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-07-10", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19237, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-07-10T05:16:48+08:00", "utc": "1963-07-09T21:16:48Z", "ms": -204518591854.34433 }, "end": { "local": "1963-07-11T04:13:09+08:00", "utc": "1963-07-10T20:13:09Z", "ms": -204436011253.61984 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-10T05:16:48+08:00", "utc": "1963-07-09T21:16:48Z", "ms": -204518591854.34433 }, "end": { "local": "1963-07-11T04:13:09+08:00", "utc": "1963-07-10T20:13:09Z", "ms": -204436011253.61984 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-07-09", "window": { "start": { "local": "1963-07-09T22:10:52+08:00", "utc": "1963-07-09T14:10:52Z", "ms": -204544148246.46088 }, "end": { "local": "1963-07-09T22:10:52+08:00", "utc": "1963-07-09T14:10:52Z", "ms": -204544148246.46088 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-07-10", "window": { "start": { "local": "1963-07-10T22:52:32+08:00", "utc": "1963-07-10T14:52:32Z", "ms": -204455248330.34576 }, "end": { "local": "1963-07-10T22:52:32+08:00", "utc": "1963-07-10T14:52:32Z", "ms": -204455248330.34576 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:17 on Wed 10 Jul to 04:13 on Thu 11 Jul.", "fact": "1963-07-09T21:16:48Z → 1963-07-10T20:13:09Z" }, { "step": "kaala", "text": "Moonrise is at 22:11 on the 9th and 22:53 on the 10th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 9th and is on the 10th.", "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 19237 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Wednesday 10 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": "1963-07-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-10", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Wednesday 10 July. Caturthī runs from 05:17 on Wed 10 Jul to 04:13 on Thu 11 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-07-10", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-07-17", "festival": "ekadashi", "name": "Kāmikā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25736, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-07-16T15:53:20+08:00", "utc": "1963-07-16T07:53:20Z", "ms": -203962000126.50476 }, "end": { "local": "1963-07-17T13:20:55+08:00", "utc": "1963-07-17T05:20:55Z", "ms": -203884745326.5081 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-16T15:53:20+08:00", "utc": "1963-07-16T07:53:20Z", "ms": -203962000126.50476 }, "end": { "local": "1963-07-17T13:20:55+08:00", "utc": "1963-07-17T05:20:55Z", "ms": -203884745326.5081 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-07-16", "window": { "start": { "local": "1963-07-16T06:11:26+08:00", "utc": "1963-07-15T22:11:26Z", "ms": -203996914369.15167 }, "end": { "local": "1963-07-16T06:11:26+08:00", "utc": "1963-07-15T22:11:26Z", "ms": -203996914369.15167 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-07-17", "window": { "start": { "local": "1963-07-17T06:11:59+08:00", "utc": "1963-07-16T22:11:59Z", "ms": -203910480900.34546 }, "end": { "local": "1963-07-17T06:11:59+08:00", "utc": "1963-07-16T22:11:59Z", "ms": -203910480900.34546 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 15:53 on Tue 16 Jul to 13:21 on Wed 17 Jul.", "fact": "1963-07-16T07:53:20Z → 1963-07-17T05:20:55Z" }, { "step": "kaala", "text": "Sunrise is at 06:11 on the 16th and 06:12 on the 17th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 16th and is on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 25736 s" }, { "step": "ruling", "text": "Kāmikā Ekādaśī, Chengdu, 1963: Wednesday 17 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": "1963-07-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-17", "confidence": "determinate" } ], "quote": "In Chengdu, Kāmikā Ekādaśī 1963 falls on Wednesday 17 July. Ekādaśī runs from 15:53 on Tue 16 Jul to 13:21 on Wed 17 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-07-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-07-18", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33296, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-07-18T10:51:49+08:00", "utc": "1963-07-18T02:51:49Z", "ms": -203807290683.73233 }, "end": { "local": "1963-07-19T08:31:42+08:00", "utc": "1963-07-19T00:31:42Z", "ms": -203729298108.40277 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-18T10:51:49+08:00", "utc": "1963-07-18T02:51:49Z", "ms": -203807290683.73233 }, "end": { "local": "1963-07-19T08:31:42+08:00", "utc": "1963-07-19T00:31:42Z", "ms": -203729298108.40277 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-07-18", "window": { "start": { "local": "1963-07-18T20:06:45+08:00", "utc": "1963-07-18T12:06:45Z", "ms": -203773994866.22104 }, "end": { "local": "1963-07-18T21:27:36+08:00", "utc": "1963-07-18T13:27:36Z", "ms": -203769143898.63855 } }, "covered_min": 81, "window_min": 81, "qualifies": true }, { "local_date": "1963-07-19", "window": { "start": { "local": "1963-07-19T20:06:20+08:00", "utc": "1963-07-19T12:06:20Z", "ms": -203687620120.00272 }, "end": { "local": "1963-07-19T21:27:19+08:00", "utc": "1963-07-19T13:27:19Z", "ms": -203682761151.572 } }, "covered_min": 0, "window_min": 81, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 10:52 on Thu 18 Jul to 08:32 on Fri 19 Jul.", "fact": "1963-07-18T02:51:49Z → 1963-07-19T00:31:42Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:07–21:28 on the 18th, 20:06–21:27 on the 19th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 81 of 81 minutes on the 18th and 0 of 81 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33296 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Thursday 18 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": "1963-07-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-18", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Thursday 18 July. Trayodaśī runs from 10:52 on Thu 18 Jul to 08:32 on Fri 19 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-07-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-07-19", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17554, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-07-19T08:31:42+08:00", "utc": "1963-07-19T00:31:42Z", "ms": -203729298108.40277 }, "end": { "local": "1963-07-20T06:26:35+08:00", "utc": "1963-07-19T22:26:35Z", "ms": -203650404971.69086 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-19T08:31:42+08:00", "utc": "1963-07-19T00:31:42Z", "ms": -203729298108.40277 }, "end": { "local": "1963-07-20T06:26:35+08:00", "utc": "1963-07-19T22:26:35Z", "ms": -203650404971.69086 } }, "kaala": "nishita", "days": [ { "local_date": "1963-07-18", "window": { "start": { "local": "1963-07-19T00:45:56+08:00", "utc": "1963-07-18T16:45:56Z", "ms": -203757243737.7867 }, "end": { "local": "1963-07-19T01:33:56+08:00", "utc": "1963-07-18T17:33:56Z", "ms": -203754363737.7867 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-07-19", "window": { "start": { "local": "1963-07-20T00:46:01+08:00", "utc": "1963-07-19T16:46:01Z", "ms": -203670838988.38748 }, "end": { "local": "1963-07-20T01:34:01+08:00", "utc": "1963-07-19T17:34:01Z", "ms": -203667958988.38748 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 08:32 on Fri 19 Jul to 06:27 on Sat 20 Jul.", "fact": "1963-07-19T00:31:42Z → 1963-07-19T22:26:35Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:46–01:34 on the 18th, 00:46–01:34 on the 19th.", "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 18th and 48 of 48 on the 19th.", "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 17554 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Friday 19 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": "1963-07-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-19", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Friday 19 July. Caturdaśī runs from 08:32 on Fri 19 Jul to 06:27 on Sat 20 Jul and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-07-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/madhusrava-tritiya", "festival": "madhusrava-tritiya", "name": "Madhusravā Tṛtīyā", "everyday": "Hariyali Teej", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36229, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-07-23T02:42:08+08:00", "utc": "1963-07-22T18:42:08Z", "ms": -203404672108.41068 }, "end": { "local": "1963-07-24T02:34:52+08:00", "utc": "1963-07-23T18:34:52Z", "ms": -203318708234.97272 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-23T02:42:08+08:00", "utc": "1963-07-22T18:42:08Z", "ms": -203404672108.41068 }, "end": { "local": "1963-07-24T02:34:52+08:00", "utc": "1963-07-23T18:34:52Z", "ms": -203318708234.97272 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-07-23", "window": { "start": { "local": "1963-07-23T12:45:56+08:00", "utc": "1963-07-23T04:45:56Z", "ms": -203368443552.33008 }, "end": { "local": "1963-07-23T13:33:56+08:00", "utc": "1963-07-23T05:33:56Z", "ms": -203365563552.33008 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-07-24", "window": { "start": { "local": "1963-07-24T12:45:58+08:00", "utc": "1963-07-24T04:45:58Z", "ms": -203282041766.40814 }, "end": { "local": "1963-07-24T13:33:58+08:00", "utc": "1963-07-24T05:33:58Z", "ms": -203279161766.40814 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 02:42 on Tue 23 Jul to 02:35 on Wed 24 Jul.", "fact": "1963-07-22T18:42:08Z → 1963-07-23T18:34:52Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 23rd, 12:46–13:34 on the 24th.", "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 23rd and 0 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 36229 s" }, { "step": "ruling", "text": "Madhusravā Tṛtīyā, Chengdu, 1963: Tuesday 23 July.", "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": "1963-07-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-23", "confidence": "determinate" } ], "quote": "In Chengdu, Madhusravā Tṛtīyā (Hariyali Teej) 1963 falls on Tuesday 23 July. Tṛtīyā runs from 02:42 on Tue 23 Jul to 02:35 on Wed 24 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-07-24", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34787, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-07-24T02:34:52+08:00", "utc": "1963-07-23T18:34:52Z", "ms": -203318708234.97272 }, "end": { "local": "1963-07-25T03:06:12+08:00", "utc": "1963-07-24T19:06:12Z", "ms": -203230427946.4572 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-24T02:34:52+08:00", "utc": "1963-07-23T18:34:52Z", "ms": -203318708234.97272 }, "end": { "local": "1963-07-25T03:06:12+08:00", "utc": "1963-07-24T19:06:12Z", "ms": -203230427946.4572 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-07-24", "window": { "start": { "local": "1963-07-24T12:45:58+08:00", "utc": "1963-07-24T04:45:58Z", "ms": -203282041766.40814 }, "end": { "local": "1963-07-24T13:33:58+08:00", "utc": "1963-07-24T05:33:58Z", "ms": -203279161766.40814 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-07-25", "window": { "start": { "local": "1963-07-25T12:45:59+08:00", "utc": "1963-07-25T04:45:59Z", "ms": -203195640569.13593 }, "end": { "local": "1963-07-25T13:33:59+08:00", "utc": "1963-07-25T05:33:59Z", "ms": -203192760569.13593 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:35 on Wed 24 Jul to 03:06 on Thu 25 Jul.", "fact": "1963-07-23T18:34:52Z → 1963-07-24T19:06:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 24th, 12:46–13:34 on the 25th.", "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 24th and 0 of 48 on the 25th.", "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 34787 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Wednesday 24 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": "1963-07-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-24", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Wednesday 24 July. Caturthī runs from 02:35 on Wed 24 Jul to 03:06 on Thu 25 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-07-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/naga-panchami", "festival": "naga-panchami", "name": "Nāga Pañcamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-07-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30653, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1963-07-25T03:06:12+08:00", "utc": "1963-07-24T19:06:12Z", "ms": -203230427946.4572 }, "end": { "local": "1963-07-26T04:15:07+08:00", "utc": "1963-07-25T20:15:07Z", "ms": -203139892775.33524 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-25T03:06:12+08:00", "utc": "1963-07-24T19:06:12Z", "ms": -203230427946.4572 }, "end": { "local": "1963-07-26T04:15:07+08:00", "utc": "1963-07-25T20:15:07Z", "ms": -203139892775.33524 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-07-25", "window": { "start": { "local": "1963-07-25T12:45:59+08:00", "utc": "1963-07-25T04:45:59Z", "ms": -203195640569.13593 }, "end": { "local": "1963-07-25T13:33:59+08:00", "utc": "1963-07-25T05:33:59Z", "ms": -203192760569.13593 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-07-26", "window": { "start": { "local": "1963-07-26T12:46:00+08:00", "utc": "1963-07-26T04:46:00Z", "ms": -203109239968.555 }, "end": { "local": "1963-07-26T13:34:00+08:00", "utc": "1963-07-26T05:34:00Z", "ms": -203106359968.555 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 03:06 on Thu 25 Jul to 04:15 on Fri 26 Jul.", "fact": "1963-07-24T19:06:12Z → 1963-07-25T20:15:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 25th, 12:46–13:34 on the 26th.", "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 25th and 0 of 48 on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 30653 s" }, { "step": "ruling", "text": "Nāga Pañcamī, Chengdu, 1963: Thursday 25 July.", "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": "1963-07-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-07-25", "confidence": "determinate" } ], "quote": "In Chengdu, Nāga Pañcamī 1963 falls on Thursday 25 July. Pañcamī runs from 03:06 on Thu 25 Jul to 04:15 on Fri 26 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-08-01", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30580, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-07-31T14:50:01+08:00", "utc": "1963-07-31T06:50:01Z", "ms": -202669798576.36557 }, "end": { "local": "1963-08-01T16:32:25+08:00", "utc": "1963-08-01T08:32:25Z", "ms": -202577255198.41196 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-07-31T14:50:01+08:00", "utc": "1963-07-31T06:50:01Z", "ms": -202669798576.36557 }, "end": { "local": "1963-08-01T16:32:25+08:00", "utc": "1963-08-01T08:32:25Z", "ms": -202577255198.41196 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-07-31", "window": { "start": { "local": "1963-07-31T06:20:21+08:00", "utc": "1963-07-30T22:20:21Z", "ms": -202700378705.1777 }, "end": { "local": "1963-07-31T06:20:21+08:00", "utc": "1963-07-30T22:20:21Z", "ms": -202700378705.1777 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-08-01", "window": { "start": { "local": "1963-08-01T06:20:58+08:00", "utc": "1963-07-31T22:20:58Z", "ms": -202613941582.6484 }, "end": { "local": "1963-08-01T06:20:58+08:00", "utc": "1963-07-31T22:20:58Z", "ms": -202613941582.6484 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 14:50 on Wed 31 Jul to 16:32 on Thu 1 Aug.", "fact": "1963-07-31T06:50:01Z → 1963-08-01T08:32:25Z" }, { "step": "kaala", "text": "Sunrise is at 06:20 on the 31st and 06:21 on the 1st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 31st and is on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 30580 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Chengdu, 1963: Thursday 1 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": "1963-08-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-01", "confidence": "determinate" } ], "quote": "In Chengdu, Putradā Ekādaśī 1963 falls on Thursday 1 August. Ekādaśī runs from 14:50 on Wed 31 Jul to 16:32 on Thu 1 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-08-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/damodara-dvadashi", "festival": "damodara-dvadashi", "name": "Dāmodara Dvādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10714, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1963-08-01T16:32:25+08:00", "utc": "1963-08-01T08:32:25Z", "ms": -202577255198.41196 }, "end": { "local": "1963-08-02T17:42:22+08:00", "utc": "1963-08-02T09:42:22Z", "ms": -202486657574.5589 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-08-01T16:32:25+08:00", "utc": "1963-08-01T08:32:25Z", "ms": -202577255198.41196 }, "end": { "local": "1963-08-02T17:42:22+08:00", "utc": "1963-08-02T09:42:22Z", "ms": -202486657574.5589 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-01", "window": { "start": { "local": "1963-08-01T12:45:51+08:00", "utc": "1963-08-01T04:45:51Z", "ms": -202590849162.42267 }, "end": { "local": "1963-08-01T13:33:51+08:00", "utc": "1963-08-01T05:33:51Z", "ms": -202587969162.42267 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-02", "window": { "start": { "local": "1963-08-02T12:45:47+08:00", "utc": "1963-08-02T04:45:47Z", "ms": -202504452844.13422 }, "end": { "local": "1963-08-02T13:33:47+08:00", "utc": "1963-08-02T05:33:47Z", "ms": -202501572844.13422 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 16:32 on Thu 1 Aug to 17:42 on Fri 2 Aug.", "fact": "1963-08-01T08:32:25Z → 1963-08-02T09:42:22Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 1st, 12:46–13:34 on the 2nd.", "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 1st and 48 of 48 on the 2nd.", "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 10714 s" }, { "step": "ruling", "text": "Dāmodara Dvādaśī, Chengdu, 1963: Friday 2 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": "1963-08-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-02", "confidence": "determinate" } ], "quote": "In Chengdu, Dāmodara Dvādaśī 1963 falls on Friday 2 August. Dvādaśī runs from 16:32 on Thu 1 Aug to 17:42 on Fri 2 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/pradosha-vrata?on=1963-08-02", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6102, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-08-02T17:42:22+08:00", "utc": "1963-08-02T09:42:22Z", "ms": -202486657574.5589 }, "end": { "local": "1963-08-03T18:15:31+08:00", "utc": "1963-08-03T10:15:31Z", "ms": -202398268628.63043 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-08-02T17:42:22+08:00", "utc": "1963-08-02T09:42:22Z", "ms": -202486657574.5589 }, "end": { "local": "1963-08-03T18:15:31+08:00", "utc": "1963-08-03T10:15:31Z", "ms": -202398268628.63043 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-08-02", "window": { "start": { "local": "1963-08-02T19:57:59+08:00", "utc": "1963-08-02T11:57:59Z", "ms": -202478521272.7352 }, "end": { "local": "1963-08-02T21:21:13+08:00", "utc": "1963-08-02T13:21:13Z", "ms": -202473527399.11435 } }, "covered_min": 83, "window_min": 83, "qualifies": true }, { "local_date": "1963-08-03", "window": { "start": { "local": "1963-08-03T19:57:13+08:00", "utc": "1963-08-03T11:57:13Z", "ms": -202392167053.2827 }, "end": { "local": "1963-08-03T21:20:38+08:00", "utc": "1963-08-03T13:20:38Z", "ms": -202387162114.5628 } }, "covered_min": 0, "window_min": 83, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 17:42 on Fri 2 Aug to 18:16 on Sat 3 Aug.", "fact": "1963-08-02T09:42:22Z → 1963-08-03T10:15:31Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:58–21:21 on the 2nd, 19:57–21:21 on the 3rd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 83 of 83 minutes on the 2nd and 0 of 83 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 6102 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Friday 2 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": "1963-08-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-02", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Friday 2 August. Trayodaśī runs from 17:42 on Fri 2 Aug to 18:16 on Sat 3 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-08-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/raksha-bandhana", "festival": "raksha-bandhana", "name": "Rakṣā Bandhana", "everyday": "Rakhi", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-05", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 1698, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-08-04T18:11:00+08:00", "utc": "1963-08-04T10:11:00Z", "ms": -202312140151.9582 }, "end": { "local": "1963-08-05T17:30:50+08:00", "utc": "1963-08-05T09:30:50Z", "ms": -202228150014.85794 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "second-half", "start": { "local": "1963-08-05T05:55:09+08:00", "utc": "1963-08-04T21:55:09Z", "ms": -202269890921.86322 }, "end": { "local": "1963-08-05T17:30:50+08:00", "utc": "1963-08-05T09:30:50Z", "ms": -202228150014.85794 } }, "kaala": "day", "days": [ { "local_date": "1963-08-04", "window": { "start": { "local": "1963-08-04T06:22:50+08:00", "utc": "1963-08-03T22:22:50Z", "ms": -202354630012.88342 }, "end": { "local": "1963-08-05T06:23:27+08:00", "utc": "1963-08-04T22:23:27Z", "ms": -202268192805.836 } }, "covered_min": 28, "window_min": 1441, "qualifies": true }, { "local_date": "1963-08-05", "window": { "start": { "local": "1963-08-05T06:23:27+08:00", "utc": "1963-08-04T22:23:27Z", "ms": -202268192805.836 }, "end": { "local": "1963-08-06T06:24:04+08:00", "utc": "1963-08-05T22:24:04Z", "ms": -202181755611.11578 } }, "covered_min": 667, "window_min": 1441, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 18:11 on Sun 4 Aug to 17:31 on Mon 5 Aug. Its second half begins at 05:55 on Mon 5 Aug.", "fact": "1963-08-04T10:11:00Z → 1963-08-05T09:30:50Z · second half from 1963-08-04T21:55:09Z" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 06:23 on the 4th, and from 06:23 on the 5th.", "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 28 of 1441 minutes on the 4th and 667 of 1441 on the 5th.", "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 1698 s" }, { "step": "ruling", "text": "Rakṣā Bandhana, Chengdu, 1963: Monday 5 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": "1963-08-05", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-05", "confidence": "boundary" } ], "quote": "In Chengdu, Rakṣā Bandhana (Rakhi) 1963 falls on Monday 5 August. The second half of Pūrṇimā runs from 05:55 on Mon 5 Aug to 17:31 on Mon 5 Aug and falls on two days: 667 minutes of it on the 5th, 28 on the 4th; 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/chengdu/festivals/1963/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": "/chengdu/festivals/1963/rishi-tarpana", "festival": "rishi-tarpana", "name": "Ṛṣi Tarpaṇa", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14238, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-08-04T18:11:00+08:00", "utc": "1963-08-04T10:11:00Z", "ms": -202312140151.9582 }, "end": { "local": "1963-08-05T17:30:50+08:00", "utc": "1963-08-05T09:30:50Z", "ms": -202228150014.85794 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1963-08-04T18:11:00+08:00", "utc": "1963-08-04T10:11:00Z", "ms": -202312140151.9582 }, "end": { "local": "1963-08-05T17:30:50+08:00", "utc": "1963-08-05T09:30:50Z", "ms": -202228150014.85794 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-04", "window": { "start": { "local": "1963-08-04T12:45:38+08:00", "utc": "1963-08-04T04:45:38Z", "ms": -202331662036.7575 }, "end": { "local": "1963-08-04T13:33:38+08:00", "utc": "1963-08-04T05:33:38Z", "ms": -202328782036.7575 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-05", "window": { "start": { "local": "1963-08-05T12:45:32+08:00", "utc": "1963-08-05T04:45:32Z", "ms": -202245267538.29694 }, "end": { "local": "1963-08-05T13:33:32+08:00", "utc": "1963-08-05T05:33:32Z", "ms": -202242387538.29694 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 18:11 on Sun 4 Aug to 17:31 on Mon 5 Aug.", "fact": "1963-08-04T10:11:00Z → 1963-08-05T09:30:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 4th, 12:46–13:34 on the 5th.", "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 4th and 48 of 48 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 14238 s" }, { "step": "ruling", "text": "Ṛṣi Tarpaṇa, Chengdu, 1963: Monday 5 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": "1963-08-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-05", "confidence": "determinate" } ], "quote": "In Chengdu, Ṛṣi Tarpaṇa 1963 falls on Monday 5 August. Pūrṇimā runs from 18:11 on Sun 4 Aug to 17:31 on Mon 5 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ashunya-shayana-vrata", "festival": "ashunya-shayana-vrata", "name": "Aśūnya Śayana Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16253, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1963-08-06T16:19:10+08:00", "utc": "1963-08-06T08:19:10Z", "ms": -202146050122.0549 }, "end": { "local": "1963-08-07T14:41:26+08:00", "utc": "1963-08-07T06:41:26Z", "ms": -202065513754.1904 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-06T16:19:10+08:00", "utc": "1963-08-06T08:19:10Z", "ms": -202146050122.0549 }, "end": { "local": "1963-08-07T14:41:26+08:00", "utc": "1963-08-07T06:41:26Z", "ms": -202065513754.1904 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-08-06", "window": { "start": { "local": "1963-08-06T20:50:03+08:00", "utc": "1963-08-06T12:50:03Z", "ms": -202129796826.67224 }, "end": { "local": "1963-08-06T20:50:03+08:00", "utc": "1963-08-06T12:50:03Z", "ms": -202129796826.67224 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-08-07", "window": { "start": { "local": "1963-08-07T21:30:41+08:00", "utc": "1963-08-07T13:30:41Z", "ms": -202040959207.90936 }, "end": { "local": "1963-08-07T21:30:41+08:00", "utc": "1963-08-07T13:30:41Z", "ms": -202040959207.90936 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 16:19 on Tue 6 Aug to 14:41 on Wed 7 Aug.", "fact": "1963-08-06T08:19:10Z → 1963-08-07T06:41:26Z" }, { "step": "kaala", "text": "Moonrise is at 20:50 on the 6th and 21:31 on the 7th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā must be current at moonrise. It is on the 6th and is not on the 7th.", "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 16253 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata, Chengdu, 1963: Tuesday 6 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": "1963-08-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-06", "confidence": "determinate" } ], "quote": "In Chengdu, Aśūnya Śayana Vrata 1963 falls on Tuesday 6 August. Dvitīyā runs from 16:19 on Tue 6 Aug to 14:41 on Wed 7 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/kajjali-tritiya", "festival": "kajjali-tritiya", "name": "Kajjalī Tṛtīyā", "everyday": "Kajari Teej", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-08", "confidence": "boundary", "boundary_reasons": [ "margin" ], "boundary_margin_s": 89, "anga": { "type": "tithi", "index": 17, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-08-07T14:41:26+08:00", "utc": "1963-08-07T06:41:26Z", "ms": -202065513754.1904 }, "end": { "local": "1963-08-08T12:43:43+08:00", "utc": "1963-08-08T04:43:43Z", "ms": -201986176532.67682 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-07T14:41:26+08:00", "utc": "1963-08-07T06:41:26Z", "ms": -202065513754.1904 }, "end": { "local": "1963-08-08T12:43:43+08:00", "utc": "1963-08-08T04:43:43Z", "ms": -201986176532.67682 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-07", "window": { "start": { "local": "1963-08-07T12:45:20+08:00", "utc": "1963-08-07T04:45:20Z", "ms": -202072480319.54828 }, "end": { "local": "1963-08-07T13:33:20+08:00", "utc": "1963-08-07T05:33:20Z", "ms": -202069600319.54828 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-08", "window": { "start": { "local": "1963-08-08T12:45:12+08:00", "utc": "1963-08-08T04:45:12Z", "ms": -201986087583.46643 }, "end": { "local": "1963-08-08T13:33:12+08:00", "utc": "1963-08-08T05:33:12Z", "ms": -201983207583.46643 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 14:41 on Wed 7 Aug to 12:44 on Thu 8 Aug.", "fact": "1963-08-07T06:41:26Z → 1963-08-08T04:43:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:45–13:33 on the 7th, 12:45–13:33 on the 8th.", "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 7th and 0 of 48 on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: paraviddha → second-day · margin 89 s < 300 s" }, { "step": "ruling", "text": "Kajjalī Tṛtīyā, Chengdu, 1963: Thursday 8 August.", "fact": "confidence: boundary (margin)" } ], "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": "1963-08-08", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-08", "confidence": "determinate" } ], "quote": "In Chengdu, Kajjalī Tṛtīyā (Kajari Teej) 1963 falls on Thursday 8 August. Tṛtīyā runs from 14:41 on Wed 7 Aug to 12:44 on Thu 8 Aug, and reaches madhyāhna on neither day. It is 1 min 29 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/bahula-chaturthi", "festival": "bahula-chaturthi", "name": "Bahulā Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16069, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-08-08T12:43:43+08:00", "utc": "1963-08-08T04:43:43Z", "ms": -201986176532.67682 }, "end": { "local": "1963-08-09T10:32:11+08:00", "utc": "1963-08-09T02:32:11Z", "ms": -201907669208.7881 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-08T12:43:43+08:00", "utc": "1963-08-08T04:43:43Z", "ms": -201986176532.67682 }, "end": { "local": "1963-08-09T10:32:11+08:00", "utc": "1963-08-09T02:32:11Z", "ms": -201907669208.7881 } }, "kaala": "sayahna", "days": [ { "local_date": "1963-08-08", "window": { "start": { "local": "1963-08-08T17:11:33+08:00", "utc": "1963-08-08T09:11:33Z", "ms": -201970107354.99954 }, "end": { "local": "1963-08-08T19:53:06+08:00", "utc": "1963-08-08T11:53:06Z", "ms": -201960413869.35495 } }, "covered_min": 162, "window_min": 162, "qualifies": true }, { "local_date": "1963-08-09", "window": { "start": { "local": "1963-08-09T17:10:58+08:00", "utc": "1963-08-09T09:10:58Z", "ms": -201883742151.7244 }, "end": { "local": "1963-08-09T19:52:13+08:00", "utc": "1963-08-09T11:52:13Z", "ms": -201874066640.859 } }, "covered_min": 0, "window_min": 161, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:44 on Thu 8 Aug to 10:32 on Fri 9 Aug.", "fact": "1963-08-08T04:43:43Z → 1963-08-09T02:32:11Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 17:12–19:53 on the 8th, 17:11–19:52 on the 9th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during sāyāhna. It covers 162 of 162 minutes on the 8th and 0 of 161 on the 9th.", "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 16069 s" }, { "step": "ruling", "text": "Bahulā Caturthī, Chengdu, 1963: Thursday 8 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": "1963-08-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-08", "confidence": "determinate" } ], "quote": "In Chengdu, Bahulā Caturthī 1963 falls on Thursday 8 August. Caturthī runs from 12:44 on Thu 8 Aug to 10:32 on Fri 9 Aug and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-08-08", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33914, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-08-08T12:43:43+08:00", "utc": "1963-08-08T04:43:43Z", "ms": -201986176532.67682 }, "end": { "local": "1963-08-09T10:32:11+08:00", "utc": "1963-08-09T02:32:11Z", "ms": -201907669208.7881 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-08T12:43:43+08:00", "utc": "1963-08-08T04:43:43Z", "ms": -201986176532.67682 }, "end": { "local": "1963-08-09T10:32:11+08:00", "utc": "1963-08-09T02:32:11Z", "ms": -201907669208.7881 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-08-08", "window": { "start": { "local": "1963-08-08T22:08:57+08:00", "utc": "1963-08-08T14:08:57Z", "ms": -201952262596.00565 }, "end": { "local": "1963-08-08T22:08:57+08:00", "utc": "1963-08-08T14:08:57Z", "ms": -201952262596.00565 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-08-09", "window": { "start": { "local": "1963-08-09T22:46:01+08:00", "utc": "1963-08-09T14:46:01Z", "ms": -201863638510.60236 }, "end": { "local": "1963-08-09T22:46:01+08:00", "utc": "1963-08-09T14:46:01Z", "ms": -201863638510.60236 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:44 on Thu 8 Aug to 10:32 on Fri 9 Aug.", "fact": "1963-08-08T04:43:43Z → 1963-08-09T02:32:11Z" }, { "step": "kaala", "text": "Moonrise is at 22:09 on the 8th and 22:46 on the 9th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 8th and is not on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33914 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Thursday 8 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": "1963-08-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-08", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Thursday 8 August. Caturthī runs from 12:44 on Thu 8 Aug to 10:32 on Fri 9 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-08-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/hala-shashthi", "festival": "hala-shashthi", "name": "Hala Ṣaṣṭhī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16339, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1963-08-10T08:12:38+08:00", "utc": "1963-08-10T00:12:38Z", "ms": -201829642350.76694 }, "end": { "local": "1963-08-11T05:50:17+08:00", "utc": "1963-08-10T21:50:17Z", "ms": -201751783361.23303 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-10T08:12:38+08:00", "utc": "1963-08-10T00:12:38Z", "ms": -201829642350.76694 }, "end": { "local": "1963-08-11T05:50:17+08:00", "utc": "1963-08-10T21:50:17Z", "ms": -201751783361.23303 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-10", "window": { "start": { "local": "1963-08-10T12:44:56+08:00", "utc": "1963-08-10T04:44:56Z", "ms": -201813303814.24213 }, "end": { "local": "1963-08-10T13:32:56+08:00", "utc": "1963-08-10T05:32:56Z", "ms": -201810423814.24213 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-08-11", "window": { "start": { "local": "1963-08-11T12:44:47+08:00", "utc": "1963-08-11T04:44:47Z", "ms": -201726912763.29053 }, "end": { "local": "1963-08-11T13:32:47+08:00", "utc": "1963-08-11T05:32:47Z", "ms": -201724032763.29053 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 08:13 on Sat 10 Aug to 05:50 on Sun 11 Aug.", "fact": "1963-08-10T00:12:38Z → 1963-08-10T21:50:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:45–13:33 on the 10th, 12:45–13:33 on the 11th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 10th and 0 of 48 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 16339 s" }, { "step": "ruling", "text": "Hala Ṣaṣṭhī, Chengdu, 1963: Saturday 10 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": "1963-08-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-10", "confidence": "determinate" } ], "quote": "In Chengdu, Hala Ṣaṣṭhī 1963 falls on Saturday 10 August. Ṣaṣṭhī runs from 08:13 on Sat 10 Aug to 05:50 on Sun 11 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/shitala-saptami", "festival": "shitala-saptami", "name": "Śītalā Saptamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24871, "anga": { "type": "tithi", "index": 21, "key": "saptami", "name": "Saptamī", "start": { "local": "1963-08-11T05:50:17+08:00", "utc": "1963-08-10T21:50:17Z", "ms": -201751783361.23303 }, "end": { "local": "1963-08-12T03:29:34+08:00", "utc": "1963-08-11T19:29:34Z", "ms": -201673825922.2646 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-11T05:50:17+08:00", "utc": "1963-08-10T21:50:17Z", "ms": -201751783361.23303 }, "end": { "local": "1963-08-12T03:29:34+08:00", "utc": "1963-08-11T19:29:34Z", "ms": -201673825922.2646 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-11", "window": { "start": { "local": "1963-08-11T12:44:47+08:00", "utc": "1963-08-11T04:44:47Z", "ms": -201726912763.29053 }, "end": { "local": "1963-08-11T13:32:47+08:00", "utc": "1963-08-11T05:32:47Z", "ms": -201724032763.29053 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-08-12", "window": { "start": { "local": "1963-08-12T12:44:38+08:00", "utc": "1963-08-12T04:44:38Z", "ms": -201640522256.7433 }, "end": { "local": "1963-08-12T13:32:38+08:00", "utc": "1963-08-12T05:32:38Z", "ms": -201637642256.7433 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 05:50 on Sun 11 Aug to 03:30 on Mon 12 Aug.", "fact": "1963-08-10T21:50:17Z → 1963-08-11T19:29:34Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:45–13:33 on the 11th, 12:45–13:33 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 48 of 48 minutes on the 11th and 0 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 24871 s" }, { "step": "ruling", "text": "Śītalā Saptamī, Chengdu, 1963: Sunday 11 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shitala-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 7 Sitala saptami (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-08-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-11", "confidence": "determinate" } ], "quote": "In Chengdu, Śītalā Saptamī 1963 falls on Sunday 11 August. Saptamī runs from 05:50 on Sun 11 Aug to 03:30 on Mon 12 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/janmashtami", "festival": "janmashtami", "name": "Janmāṣṭamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1128, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-08-12T03:29:34+08:00", "utc": "1963-08-11T19:29:34Z", "ms": -201673825922.2646 }, "end": { "local": "1963-08-13T01:14:08+08:00", "utc": "1963-08-12T17:14:08Z", "ms": -201595551661.36636 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-12T03:29:34+08:00", "utc": "1963-08-11T19:29:34Z", "ms": -201673825922.2646 }, "end": { "local": "1963-08-13T01:14:08+08:00", "utc": "1963-08-12T17:14:08Z", "ms": -201595551661.36636 } }, "kaala": "nishita", "days": [ { "local_date": "1963-08-11", "window": { "start": { "local": "1963-08-12T00:45:06+08:00", "utc": "1963-08-11T16:45:06Z", "ms": -201683694292.12122 }, "end": { "local": "1963-08-12T01:33:06+08:00", "utc": "1963-08-11T17:33:06Z", "ms": -201680814292.12122 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-12", "window": { "start": { "local": "1963-08-13T00:44:56+08:00", "utc": "1963-08-12T16:44:56Z", "ms": -201597303820.07104 }, "end": { "local": "1963-08-13T01:32:56+08:00", "utc": "1963-08-12T17:32:56Z", "ms": -201594423820.07104 } }, "covered_min": 29, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 03:30 on Mon 12 Aug to 01:14 on Tue 13 Aug.", "fact": "1963-08-11T19:29:34Z → 1963-08-12T17:14:08Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:45–01:33 on the 11th, 00:45–01:33 on the 12th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during niśītha. It covers 0 of 48 minutes on the 11th and 29 of 48 on the 12th.", "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 1128 s" }, { "step": "ruling", "text": "Janmāṣṭamī, Chengdu, 1963: Monday 12 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "janmashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Janmastami (madhyaratra-vyapini), if midnight is covered on two days, or not on any day, it is to be observed on the 2nd day; special when combined with naksatra 'Rohini' at midnight, more so when on Monday or Wednesday. If the combination occurs before midnight and 'Rohini' extends up to midnight, it is to be observed on that day. Gokulastami." } ], "not_evaluated": "The clauses on Rohiṇī nakṣatra, the Vaiṣṇava observance on the day after saptamī, and the Assam and South India reckoning in the solar month belong to other readings and are not applied.", "kaala": "nishita", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-08-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-12", "confidence": "determinate" } ], "quote": "In Chengdu, Janmāṣṭamī 1963 falls on Monday 12 August. Aṣṭamī runs from 03:30 on Mon 12 Aug to 01:14 on Tue 13 Aug and covers 29 of 48 minutes of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-08-15", "festival": "ekadashi", "name": "Ajā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33553, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-08-14T21:10:24+08:00", "utc": "1963-08-14T13:10:24Z", "ms": -201437375608.71057 }, "end": { "local": "1963-08-15T19:26:49+08:00", "utc": "1963-08-15T11:26:49Z", "ms": -201357190530.8241 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-14T21:10:24+08:00", "utc": "1963-08-14T13:10:24Z", "ms": -201437375608.71057 }, "end": { "local": "1963-08-15T19:26:49+08:00", "utc": "1963-08-15T11:26:49Z", "ms": -201357190530.8241 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-08-15", "window": { "start": { "local": "1963-08-15T06:29:37+08:00", "utc": "1963-08-14T22:29:37Z", "ms": -201403822816.51688 }, "end": { "local": "1963-08-15T06:29:37+08:00", "utc": "1963-08-14T22:29:37Z", "ms": -201403822816.51688 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-08-16", "window": { "start": { "local": "1963-08-16T06:30:14+08:00", "utc": "1963-08-15T22:30:14Z", "ms": -201317386205.74307 }, "end": { "local": "1963-08-16T06:30:14+08:00", "utc": "1963-08-15T22:30:14Z", "ms": -201317386205.74307 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:10 on Wed 14 Aug to 19:27 on Thu 15 Aug.", "fact": "1963-08-14T13:10:24Z → 1963-08-15T11:26:49Z" }, { "step": "kaala", "text": "Sunrise is at 06:30 on the 15th and 06:30 on the 16th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 15th and is not on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33553 s" }, { "step": "ruling", "text": "Ajā Ekādaśī, Chengdu, 1963: Thursday 15 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": "1963-08-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-15", "confidence": "determinate" } ], "quote": "In Chengdu, Ajā Ekādaśī 1963 falls on Thursday 15 August. Ekādaśī runs from 21:10 on Wed 14 Aug to 19:27 on Thu 15 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-08-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-08-16", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6422, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-08-16T17:58:33+08:00", "utc": "1963-08-16T09:58:33Z", "ms": -201276087024.59045 }, "end": { "local": "1963-08-17T16:48:17+08:00", "utc": "1963-08-17T08:48:17Z", "ms": -201193903440.962 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-16T17:58:33+08:00", "utc": "1963-08-16T09:58:33Z", "ms": -201276087024.59045 }, "end": { "local": "1963-08-17T16:48:17+08:00", "utc": "1963-08-17T08:48:17Z", "ms": -201193903440.962 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-08-16", "window": { "start": { "local": "1963-08-16T19:45:35+08:00", "utc": "1963-08-16T11:45:35Z", "ms": -201269664849.54367 }, "end": { "local": "1963-08-16T21:11:37+08:00", "utc": "1963-08-16T13:11:37Z", "ms": -201264502829.89334 } }, "covered_min": 86, "window_min": 86, "qualifies": true }, { "local_date": "1963-08-17", "window": { "start": { "local": "1963-08-17T19:44:34+08:00", "utc": "1963-08-17T11:44:34Z", "ms": -201183325573.3959 }, "end": { "local": "1963-08-17T21:10:49+08:00", "utc": "1963-08-17T13:10:49Z", "ms": -201178150605.66205 } }, "covered_min": 0, "window_min": 86, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 17:59 on Fri 16 Aug to 16:48 on Sat 17 Aug.", "fact": "1963-08-16T09:58:33Z → 1963-08-17T08:48:17Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:46–21:12 on the 16th, 19:45–21:11 on the 17th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 86 of 86 minutes on the 16th and 0 of 86 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 6422 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Friday 16 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-08-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-16", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Friday 16 August. Trayodaśī runs from 17:59 on Fri 16 Aug to 16:48 on Sat 17 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-08-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/aghora-chaturdashi", "festival": "aghora-chaturdashi", "name": "Aghora Caturdaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10578, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-08-17T16:48:17+08:00", "utc": "1963-08-17T08:48:17Z", "ms": -201193903440.962 }, "end": { "local": "1963-08-18T15:59:07+08:00", "utc": "1963-08-18T07:59:07Z", "ms": -201110452956.73764 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-17T16:48:17+08:00", "utc": "1963-08-17T08:48:17Z", "ms": -201193903440.962 }, "end": { "local": "1963-08-18T15:59:07+08:00", "utc": "1963-08-18T07:59:07Z", "ms": -201110452956.73764 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-08-17", "window": { "start": { "local": "1963-08-17T19:44:34+08:00", "utc": "1963-08-17T11:44:34Z", "ms": -201183325573.3959 }, "end": { "local": "1963-08-17T21:10:49+08:00", "utc": "1963-08-17T13:10:49Z", "ms": -201178150605.66205 } }, "covered_min": 86, "window_min": 86, "qualifies": true }, { "local_date": "1963-08-18", "window": { "start": { "local": "1963-08-18T19:43:33+08:00", "utc": "1963-08-18T11:43:33Z", "ms": -201096987190.7534 }, "end": { "local": "1963-08-18T21:10:01+08:00", "utc": "1963-08-18T13:10:01Z", "ms": -201091799172.56644 } }, "covered_min": 0, "window_min": 86, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 16:48 on Sat 17 Aug to 15:59 on Sun 18 Aug.", "fact": "1963-08-17T08:48:17Z → 1963-08-18T07:59:07Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:45–21:11 on the 17th, 19:44–21:10 on the 18th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 86 of 86 minutes on the 17th and 0 of 86 on the 18th.", "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 10578 s" }, { "step": "ruling", "text": "Aghora Caturdaśī, Chengdu, 1963: Saturday 17 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "aghora-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Aghora caturdasi (pradosa vyapini)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-08-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-17", "confidence": "determinate" } ], "quote": "In Chengdu, Aghora Caturdaśī 1963 falls on Saturday 17 August. Caturdaśī runs from 16:48 on Sat 17 Aug to 15:59 on Sun 18 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/shivaratri?on=1963-08-17", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28544, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-08-17T16:48:17+08:00", "utc": "1963-08-17T08:48:17Z", "ms": -201193903440.962 }, "end": { "local": "1963-08-18T15:59:07+08:00", "utc": "1963-08-18T07:59:07Z", "ms": -201110452956.73764 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-17T16:48:17+08:00", "utc": "1963-08-17T08:48:17Z", "ms": -201193903440.962 }, "end": { "local": "1963-08-18T15:59:07+08:00", "utc": "1963-08-18T07:59:07Z", "ms": -201110452956.73764 } }, "kaala": "nishita", "days": [ { "local_date": "1963-08-17", "window": { "start": { "local": "1963-08-18T00:44:01+08:00", "utc": "1963-08-17T16:44:01Z", "ms": -201165359444.39398 }, "end": { "local": "1963-08-18T01:32:01+08:00", "utc": "1963-08-17T17:32:01Z", "ms": -201162479444.39398 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-08-18", "window": { "start": { "local": "1963-08-19T00:43:48+08:00", "utc": "1963-08-18T16:43:48Z", "ms": -201078972122.5523 }, "end": { "local": "1963-08-19T01:31:48+08:00", "utc": "1963-08-18T17:31:48Z", "ms": -201076092122.5523 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 16:48 on Sat 17 Aug to 15:59 on Sun 18 Aug.", "fact": "1963-08-17T08:48:17Z → 1963-08-18T07:59:07Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:44–01:32 on the 17th, 00:44–01:32 on the 18th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 17th and 0 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 28544 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Saturday 17 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": "1963-08-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-17", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Saturday 17 August. Caturdaśī runs from 16:48 on Sat 17 Aug to 15:59 on Sun 18 Aug and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-08-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/rudra-vrata", "festival": "rudra-vrata", "name": "Rudra Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7393, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1963-08-19T15:34:30+08:00", "utc": "1963-08-19T07:34:30Z", "ms": -201025530370.02133 }, "end": { "local": "1963-08-20T15:37:47+08:00", "utc": "1963-08-20T07:37:47Z", "ms": -200938933448.45673 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-19T15:34:30+08:00", "utc": "1963-08-19T07:34:30Z", "ms": -201025530370.02133 }, "end": { "local": "1963-08-20T15:37:47+08:00", "utc": "1963-08-20T07:37:47Z", "ms": -200938933448.45673 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-19", "window": { "start": { "local": "1963-08-19T12:43:17+08:00", "utc": "1963-08-19T04:43:17Z", "ms": -201035803367.3053 }, "end": { "local": "1963-08-19T13:31:17+08:00", "utc": "1963-08-19T05:31:17Z", "ms": -201032923367.3053 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-20", "window": { "start": { "local": "1963-08-20T12:43:03+08:00", "utc": "1963-08-20T04:43:03Z", "ms": -200949416973.6238 }, "end": { "local": "1963-08-20T13:31:03+08:00", "utc": "1963-08-20T05:31:03Z", "ms": -200946536973.6238 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 15:34 on Mon 19 Aug to 15:38 on Tue 20 Aug.", "fact": "1963-08-19T07:34:30Z → 1963-08-20T07:37:47Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:43–13:31 on the 19th, 12:43–13:31 on the 20th.", "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 19th and 48 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 7393 s" }, { "step": "ruling", "text": "Rudra Vrata, Chengdu, 1963: Tuesday 20 August.", "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": "1963-08-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-20", "confidence": "determinate" } ], "quote": "In Chengdu, Rudra Vrata 1963 falls on Tuesday 20 August. Pratipadā runs from 15:34 on Mon 19 Aug to 15:38 on Tue 20 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/haritalika-vrata", "festival": "haritalika-vrata", "name": "Haritālikā Vrata", "everyday": "Hartalika Teej", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9651, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1963-08-21T16:11:40+08:00", "utc": "1963-08-21T08:11:40Z", "ms": -200850499601.67914 }, "end": { "local": "1963-08-22T17:17:24+08:00", "utc": "1963-08-22T09:17:24Z", "ms": -200760156000.8678 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-21T16:11:40+08:00", "utc": "1963-08-21T08:11:40Z", "ms": -200850499601.67914 }, "end": { "local": "1963-08-22T17:17:24+08:00", "utc": "1963-08-22T09:17:24Z", "ms": -200760156000.8678 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-21", "window": { "start": { "local": "1963-08-21T12:42:49+08:00", "utc": "1963-08-21T04:42:49Z", "ms": -200863031064.31232 }, "end": { "local": "1963-08-21T13:30:49+08:00", "utc": "1963-08-21T05:30:49Z", "ms": -200860151064.31232 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-22", "window": { "start": { "local": "1963-08-22T12:42:34+08:00", "utc": "1963-08-22T04:42:34Z", "ms": -200776645630.66162 }, "end": { "local": "1963-08-22T13:30:34+08:00", "utc": "1963-08-22T05:30:34Z", "ms": -200773765630.66162 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 16:12 on Wed 21 Aug to 17:17 on Thu 22 Aug.", "fact": "1963-08-21T08:11:40Z → 1963-08-22T09:17:24Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:43–13:31 on the 21st, 12:43–13:31 on the 22nd.", "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 21st and 48 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: paraviddha → only-day · margin 9651 s" }, { "step": "ruling", "text": "Haritālikā Vrata, Chengdu, 1963: Thursday 22 August.", "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": "1963-08-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-22", "confidence": "determinate" } ], "quote": "In Chengdu, Haritālikā Vrata (Hartalika Teej) 1963 falls on Thursday 22 August. Tṛtīyā runs from 16:12 on Wed 21 Aug to 17:17 on Thu 22 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ganesha-chaturthi", "festival": "ganesha-chaturthi", "name": "Gaṇeśa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13610, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-08-22T17:17:24+08:00", "utc": "1963-08-22T09:17:24Z", "ms": -200760156000.8678 }, "end": { "local": "1963-08-23T18:53:43+08:00", "utc": "1963-08-23T10:53:43Z", "ms": -200667976739.26303 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-22T17:17:24+08:00", "utc": "1963-08-22T09:17:24Z", "ms": -200760156000.8678 }, "end": { "local": "1963-08-23T18:53:43+08:00", "utc": "1963-08-23T10:53:43Z", "ms": -200667976739.26303 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-22", "window": { "start": { "local": "1963-08-22T12:42:34+08:00", "utc": "1963-08-22T04:42:34Z", "ms": -200776645630.66162 }, "end": { "local": "1963-08-22T13:30:34+08:00", "utc": "1963-08-22T05:30:34Z", "ms": -200773765630.66162 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-23", "window": { "start": { "local": "1963-08-23T12:42:19+08:00", "utc": "1963-08-23T04:42:19Z", "ms": -200690260662.9193 }, "end": { "local": "1963-08-23T13:30:19+08:00", "utc": "1963-08-23T05:30:19Z", "ms": -200687380662.9193 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:17 on Thu 22 Aug to 18:54 on Fri 23 Aug.", "fact": "1963-08-22T09:17:24Z → 1963-08-23T10:53:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:43–13:31 on the 22nd, 12:42–13:30 on the 23rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 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 13610 s" }, { "step": "ruling", "text": "Gaṇeśa Caturthī, Chengdu, 1963: Friday 23 August.", "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": "1963-08-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-23", "confidence": "determinate" } ], "quote": "In Chengdu, Gaṇeśa Caturthī 1963 falls on Friday 23 August. Caturthī runs from 17:17 on Thu 22 Aug to 18:54 on Fri 23 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/rishi-panchami", "festival": "rishi-panchami", "name": "Ṛṣi Pañcamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19404, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1963-08-23T18:53:43+08:00", "utc": "1963-08-23T10:53:43Z", "ms": -200667976739.26303 }, "end": { "local": "1963-08-24T20:56:06+08:00", "utc": "1963-08-24T12:56:06Z", "ms": -200574234032.24084 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-23T18:53:43+08:00", "utc": "1963-08-23T10:53:43Z", "ms": -200667976739.26303 }, "end": { "local": "1963-08-24T20:56:06+08:00", "utc": "1963-08-24T12:56:06Z", "ms": -200574234032.24084 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-23", "window": { "start": { "local": "1963-08-23T12:42:19+08:00", "utc": "1963-08-23T04:42:19Z", "ms": -200690260662.9193 }, "end": { "local": "1963-08-23T13:30:19+08:00", "utc": "1963-08-23T05:30:19Z", "ms": -200687380662.9193 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-24", "window": { "start": { "local": "1963-08-24T12:42:04+08:00", "utc": "1963-08-24T04:42:04Z", "ms": -200603876150.3002 }, "end": { "local": "1963-08-24T13:30:04+08:00", "utc": "1963-08-24T05:30:04Z", "ms": -200600996150.3002 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 18:54 on Fri 23 Aug to 20:56 on Sat 24 Aug.", "fact": "1963-08-23T10:53:43Z → 1963-08-24T12:56:06Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 23rd, 12:42–13:30 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 23rd and 48 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 19404 s" }, { "step": "ruling", "text": "Ṛṣi Pañcamī, Chengdu, 1963: Saturday 24 August.", "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": "1963-08-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-24", "confidence": "determinate" } ], "quote": "In Chengdu, Ṛṣi Pañcamī 1963 falls on Saturday 24 August. Pañcamī runs from 18:54 on Fri 23 Aug to 20:56 on Sat 24 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/surya-shashthi-bhadrapada", "festival": "surya-shashthi-bhadrapada", "name": "Sūrya Ṣaṣṭhī (Bhādrapada)", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26762, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1963-08-24T20:56:06+08:00", "utc": "1963-08-24T12:56:06Z", "ms": -200574234032.24084 }, "end": { "local": "1963-08-25T23:16:16+08:00", "utc": "1963-08-25T15:16:16Z", "ms": -200479423967.79498 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-24T20:56:06+08:00", "utc": "1963-08-24T12:56:06Z", "ms": -200574234032.24084 }, "end": { "local": "1963-08-25T23:16:16+08:00", "utc": "1963-08-25T15:16:16Z", "ms": -200479423967.79498 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-24", "window": { "start": { "local": "1963-08-24T12:42:04+08:00", "utc": "1963-08-24T04:42:04Z", "ms": -200603876150.3002 }, "end": { "local": "1963-08-24T13:30:04+08:00", "utc": "1963-08-24T05:30:04Z", "ms": -200600996150.3002 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-25", "window": { "start": { "local": "1963-08-25T12:41:48+08:00", "utc": "1963-08-25T04:41:48Z", "ms": -200517492081.0306 }, "end": { "local": "1963-08-25T13:29:48+08:00", "utc": "1963-08-25T05:29:48Z", "ms": -200514612081.0306 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 20:56 on Sat 24 Aug to 23:16 on Sun 25 Aug.", "fact": "1963-08-24T12:56:06Z → 1963-08-25T15:16:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 24th, 12:42–13:30 on the 25th.", "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 24th and 48 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 26762 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī (Bhādrapada), Chengdu, 1963: Sunday 25 August.", "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": "1963-08-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-25", "confidence": "determinate" } ], "quote": "In Chengdu, Sūrya Ṣaṣṭhī (Bhādrapada) 1963 falls on Sunday 25 August. Ṣaṣṭhī runs from 20:56 on Sat 24 Aug to 23:16 on Sun 25 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/muktabharana-vrata", "festival": "muktabharana-vrata", "name": "Muktābharaṇa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35188, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1963-08-25T23:16:16+08:00", "utc": "1963-08-25T15:16:16Z", "ms": -200479423967.79498 }, "end": { "local": "1963-08-27T01:42:34+08:00", "utc": "1963-08-26T17:42:34Z", "ms": -200384246385.80664 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-25T23:16:16+08:00", "utc": "1963-08-25T15:16:16Z", "ms": -200479423967.79498 }, "end": { "local": "1963-08-27T01:42:34+08:00", "utc": "1963-08-26T17:42:34Z", "ms": -200384246385.80664 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-25", "window": { "start": { "local": "1963-08-25T12:41:48+08:00", "utc": "1963-08-25T04:41:48Z", "ms": -200517492081.0306 }, "end": { "local": "1963-08-25T13:29:48+08:00", "utc": "1963-08-25T05:29:48Z", "ms": -200514612081.0306 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-08-26", "window": { "start": { "local": "1963-08-26T12:41:32+08:00", "utc": "1963-08-26T04:41:32Z", "ms": -200431108442.40198 }, "end": { "local": "1963-08-26T13:29:32+08:00", "utc": "1963-08-26T05:29:32Z", "ms": -200428228442.40198 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 23:16 on Sun 25 Aug to 01:43 on Tue 27 Aug.", "fact": "1963-08-25T15:16:16Z → 1963-08-26T17:42:34Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:42–13:30 on the 25th, 12:42–13:30 on the 26th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 25th and 48 of 48 on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 35188 s" }, { "step": "ruling", "text": "Muktābharaṇa Vrata, Chengdu, 1963: Monday 26 August.", "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": "1963-08-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-26", "confidence": "determinate" } ], "quote": "In Chengdu, Muktābharaṇa Vrata 1963 falls on Monday 26 August. Saptamī runs from 23:16 on Sun 25 Aug to 01:43 on Tue 27 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/radhashtami", "festival": "radhashtami", "name": "Rādhāṣṭamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31187, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-08-27T01:42:34+08:00", "utc": "1963-08-26T17:42:34Z", "ms": -200384246385.80664 }, "end": { "local": "1963-08-28T04:01:11+08:00", "utc": "1963-08-27T20:01:11Z", "ms": -200289529149.87836 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-27T01:42:34+08:00", "utc": "1963-08-26T17:42:34Z", "ms": -200384246385.80664 }, "end": { "local": "1963-08-28T04:01:11+08:00", "utc": "1963-08-27T20:01:11Z", "ms": -200289529149.87836 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-27", "window": { "start": { "local": "1963-08-27T12:41:15+08:00", "utc": "1963-08-27T04:41:15Z", "ms": -200344725220.81702 }, "end": { "local": "1963-08-27T13:29:15+08:00", "utc": "1963-08-27T05:29:15Z", "ms": -200341845220.81702 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-08-28", "window": { "start": { "local": "1963-08-28T12:40:58+08:00", "utc": "1963-08-28T04:40:58Z", "ms": -200258342401.82 }, "end": { "local": "1963-08-28T13:28:58+08:00", "utc": "1963-08-28T05:28:58Z", "ms": -200255462401.82 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 01:43 on Tue 27 Aug to 04:01 on Wed 28 Aug.", "fact": "1963-08-26T17:42:34Z → 1963-08-27T20:01:11Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:41–13:29 on the 27th, 12:41–13:29 on the 28th.", "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 27th and 0 of 48 on the 28th.", "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 31187 s" }, { "step": "ruling", "text": "Rādhāṣṭamī, Chengdu, 1963: Tuesday 27 August.", "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": "1963-08-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-27", "confidence": "determinate" } ], "quote": "In Chengdu, Rādhāṣṭamī 1963 falls on Tuesday 27 August. Aṣṭamī runs from 01:43 on Tue 27 Aug to 04:01 on Wed 28 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-08-31", "festival": "ekadashi", "name": "Parivartanī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2585, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-08-30T07:21:37+08:00", "utc": "1963-08-29T23:21:37Z", "ms": -200104702764.14102 }, "end": { "local": "1963-08-31T08:03:12+08:00", "utc": "1963-08-31T00:03:12Z", "ms": -200015807924.04193 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-30T07:21:37+08:00", "utc": "1963-08-29T23:21:37Z", "ms": -200104702764.14102 }, "end": { "local": "1963-08-31T08:03:12+08:00", "utc": "1963-08-31T00:03:12Z", "ms": -200015807924.04193 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-08-30", "window": { "start": { "local": "1963-08-30T06:38:32+08:00", "utc": "1963-08-29T22:38:32Z", "ms": -200107287847.34586 }, "end": { "local": "1963-08-30T06:38:32+08:00", "utc": "1963-08-29T22:38:32Z", "ms": -200107287847.34586 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-08-31", "window": { "start": { "local": "1963-08-31T06:39:07+08:00", "utc": "1963-08-30T22:39:07Z", "ms": -200020853351.89746 }, "end": { "local": "1963-08-31T06:39:07+08:00", "utc": "1963-08-30T22:39:07Z", "ms": -200020853351.89746 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 07:22 on Fri 30 Aug to 08:03 on Sat 31 Aug.", "fact": "1963-08-29T23:21:37Z → 1963-08-31T00:03:12Z" }, { "step": "kaala", "text": "Sunrise is at 06:39 on the 30th and 06:39 on the 31st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 30th and is on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 2585 s" }, { "step": "ruling", "text": "Parivartanī Ekādaśī, Chengdu, 1963: Saturday 31 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": "1963-08-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-31", "confidence": "determinate" } ], "quote": "In Chengdu, Parivartanī Ekādaśī 1963 falls on Saturday 31 August. Ekādaśī runs from 07:22 on Fri 30 Aug to 08:03 on Sat 31 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-08-31", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/vamana-jayanti", "festival": "vamana-jayanti", "name": "Vāmana Jayantī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-08-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16612, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1963-08-31T08:03:12+08:00", "utc": "1963-08-31T00:03:12Z", "ms": -200015807924.04193 }, "end": { "local": "1963-09-01T07:59:03+08:00", "utc": "1963-08-31T23:59:03Z", "ms": -199929656668.83636 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-08-31T08:03:12+08:00", "utc": "1963-08-31T00:03:12Z", "ms": -200015807924.04193 }, "end": { "local": "1963-09-01T07:59:03+08:00", "utc": "1963-08-31T23:59:03Z", "ms": -199929656668.83636 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-08-31", "window": { "start": { "local": "1963-08-31T12:40:04+08:00", "utc": "1963-08-31T04:40:04Z", "ms": -199999196202.7757 }, "end": { "local": "1963-08-31T13:28:04+08:00", "utc": "1963-08-31T05:28:04Z", "ms": -199996316202.7757 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-09-01", "window": { "start": { "local": "1963-09-01T12:39:45+08:00", "utc": "1963-09-01T04:39:45Z", "ms": -199912814831.92828 }, "end": { "local": "1963-09-01T13:27:45+08:00", "utc": "1963-09-01T05:27:45Z", "ms": -199909934831.92828 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 08:03 on Sat 31 Aug to 07:59 on Sun 1 Sep.", "fact": "1963-08-31T00:03:12Z → 1963-08-31T23:59:03Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:40–13:28 on the 31st, 12:40–13:28 on the 1st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 31st and 0 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: unstated → only-day · margin 16612 s" }, { "step": "ruling", "text": "Vāmana Jayantī, Chengdu, 1963: Saturday 31 August.", "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": "1963-08-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-08-31", "confidence": "determinate" } ], "quote": "In Chengdu, Vāmana Jayantī 1963 falls on Saturday 31 August. Dvādaśī runs from 08:03 on Sat 31 Aug to 07:59 on Sun 1 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/pradosha-vrata?on=1963-09-01", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36728, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-09-01T07:59:03+08:00", "utc": "1963-08-31T23:59:03Z", "ms": -199929656668.83636 }, "end": { "local": "1963-09-02T07:09:37+08:00", "utc": "1963-09-01T23:09:37Z", "ms": -199846223092.0767 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-09-01T07:59:03+08:00", "utc": "1963-08-31T23:59:03Z", "ms": -199929656668.83636 }, "end": { "local": "1963-09-02T07:09:37+08:00", "utc": "1963-09-01T23:09:37Z", "ms": -199846223092.0767 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-08-31", "window": { "start": { "local": "1963-08-31T19:29:01+08:00", "utc": "1963-08-31T11:29:01Z", "ms": -199974659053.65396 }, "end": { "local": "1963-08-31T20:58:26+08:00", "utc": "1963-08-31T12:58:26Z", "ms": -199969293711.39838 } }, "covered_min": 0, "window_min": 89, "qualifies": false }, { "local_date": "1963-09-01", "window": { "start": { "local": "1963-09-01T19:27:49+08:00", "utc": "1963-09-01T11:27:49Z", "ms": -199888330677.11942 }, "end": { "local": "1963-09-01T20:57:29+08:00", "utc": "1963-09-01T12:57:29Z", "ms": -199882951219.24615 } }, "covered_min": 90, "window_min": 90, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 07:59 on Sun 1 Sep to 07:10 on Mon 2 Sep.", "fact": "1963-08-31T23:59:03Z → 1963-09-01T23:09:37Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:29–20:58 on the 31st, 19:28–20:57 on the 1st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 89 minutes on the 31st and 90 of 90 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 36728 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Sunday 1 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": "1963-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-01", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Sunday 1 September. Trayodaśī runs from 07:59 on Sun 1 Sep to 07:10 on Mon 2 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-09-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ananta-chaturdashi", "festival": "ananta-chaturdashi", "name": "Ananta Caturdaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-02", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 1762, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-09-02T07:09:37+08:00", "utc": "1963-09-01T23:09:37Z", "ms": -199846223092.0767 }, "end": { "local": "1963-09-03T05:38:53+08:00", "utc": "1963-09-02T21:38:53Z", "ms": -199765266504.7979 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1963-09-02T07:09:37+08:00", "utc": "1963-09-01T23:09:37Z", "ms": -199846223092.0767 }, "end": { "local": "1963-09-03T05:38:53+08:00", "utc": "1963-09-02T21:38:53Z", "ms": -199765266504.7979 } }, "kaala": "udaya-3", "days": [ { "local_date": "1963-09-02", "window": { "start": { "local": "1963-09-02T06:40:15+08:00", "utc": "1963-09-01T22:40:15Z", "ms": -199847984743.0699 }, "end": { "local": "1963-09-02T09:13:32+08:00", "utc": "1963-09-02T01:13:32Z", "ms": -199838788356.9491 } }, "covered_min": 124, "window_min": 153, "qualifies": false }, { "local_date": "1963-09-03", "window": { "start": { "local": "1963-09-03T06:40:49+08:00", "utc": "1963-09-02T22:40:49Z", "ms": -199761550610.48608 }, "end": { "local": "1963-09-03T09:13:44+08:00", "utc": "1963-09-03T01:13:44Z", "ms": -199752375574.3382 } }, "covered_min": 0, "window_min": 153, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 07:10 on Mon 2 Sep to 05:39 on Tue 3 Sep.", "fact": "1963-09-01T23:09:37Z → 1963-09-02T21:38:53Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:40–09:14 on the 2nd, 06:41–09:14 on the 3rd.", "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 124 of 153 minutes on the 2nd and 0 of 153 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Neither morning qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 1762 s" }, { "step": "ruling", "text": "Ananta Caturdaśī, Chengdu, 1963: Monday 2 September.", "fact": "confidence: boundary (absent-unstated)" } ], "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": "1963-09-02", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-02", "confidence": "boundary" } ], "quote": "In Chengdu, Ananta Caturdaśī 1963 falls on Monday 2 September. Caturdaśī runs from 07:10 on Mon 2 Sep to 05:39 on Tue 3 Sep, and reaches the first three muhūrtas after sunrise on neither day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-09-06", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7595, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-09-06T19:15:08+08:00", "utc": "1963-09-06T11:15:08Z", "ms": -199457091754.58258 }, "end": { "local": "1963-09-07T16:18:13+08:00", "utc": "1963-09-07T08:18:13Z", "ms": -199381306709.57788 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-06T19:15:08+08:00", "utc": "1963-09-06T11:15:08Z", "ms": -199457091754.58258 }, "end": { "local": "1963-09-07T16:18:13+08:00", "utc": "1963-09-07T08:18:13Z", "ms": -199381306709.57788 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-09-06", "window": { "start": { "local": "1963-09-06T21:21:44+08:00", "utc": "1963-09-06T13:21:44Z", "ms": -199449496402.8539 }, "end": { "local": "1963-09-06T21:21:44+08:00", "utc": "1963-09-06T13:21:44Z", "ms": -199449496402.8539 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-09-07", "window": { "start": { "local": "1963-09-07T22:00:38+08:00", "utc": "1963-09-07T14:00:38Z", "ms": -199360761948.8816 }, "end": { "local": "1963-09-07T22:00:38+08:00", "utc": "1963-09-07T14:00:38Z", "ms": -199360761948.8816 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 19:15 on Fri 6 Sep to 16:18 on Sat 7 Sep.", "fact": "1963-09-06T11:15:08Z → 1963-09-07T08:18:13Z" }, { "step": "kaala", "text": "Moonrise is at 21:22 on the 6th and 22:01 on the 7th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 6th and is not on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 7595 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Friday 6 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": "1963-09-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-06", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Friday 6 September. Caturthī runs from 19:15 on Fri 6 Sep to 16:18 on Sat 7 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-09-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/chandra-shashthi", "festival": "chandra-shashthi", "name": "Candra Ṣaṣṭhī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33130, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1963-09-08T13:29:32+08:00", "utc": "1963-09-08T05:29:32Z", "ms": -199305027683.02887 }, "end": { "local": "1963-09-09T10:55:32+08:00", "utc": "1963-09-09T02:55:32Z", "ms": -199227868232.531 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-08T13:29:32+08:00", "utc": "1963-09-08T05:29:32Z", "ms": -199305027683.02887 }, "end": { "local": "1963-09-09T10:55:32+08:00", "utc": "1963-09-09T02:55:32Z", "ms": -199227868232.531 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-09-08", "window": { "start": { "local": "1963-09-08T22:41:43+08:00", "utc": "1963-09-08T14:41:43Z", "ms": -199271897463.24493 }, "end": { "local": "1963-09-08T22:41:43+08:00", "utc": "1963-09-08T14:41:43Z", "ms": -199271897463.24493 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-09-09", "window": { "start": { "local": "1963-09-09T23:26:07+08:00", "utc": "1963-09-09T15:26:07Z", "ms": -199182832871.10117 }, "end": { "local": "1963-09-09T23:26:07+08:00", "utc": "1963-09-09T15:26:07Z", "ms": -199182832871.10117 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 13:30 on Sun 8 Sep to 10:56 on Mon 9 Sep.", "fact": "1963-09-08T05:29:32Z → 1963-09-09T02:55:32Z" }, { "step": "kaala", "text": "Moonrise is at 22:42 on the 8th and 23:26 on the 9th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Ṣaṣṭhī must be current at moonrise. It is on the 8th and is not on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 33130 s" }, { "step": "ruling", "text": "Candra Ṣaṣṭhī, Chengdu, 1963: Sunday 8 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": "1963-09-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-08", "confidence": "determinate" } ], "quote": "In Chengdu, Candra Ṣaṣṭhī 1963 falls on Sunday 8 September. Ṣaṣṭhī runs from 13:30 on Sun 8 Sep to 10:56 on Mon 9 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/jitashtami", "festival": "jitashtami", "name": "Jitāṣṭamī", "everyday": "Jitiya", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36036, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-09-10T08:41:02+08:00", "utc": "1963-09-10T00:41:02Z", "ms": -199149537986.5565 }, "end": { "local": "1963-09-11T06:49:10+08:00", "utc": "1963-09-10T22:49:10Z", "ms": -199069849930.12393 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-10T08:41:02+08:00", "utc": "1963-09-10T00:41:02Z", "ms": -199149537986.5565 }, "end": { "local": "1963-09-11T06:49:10+08:00", "utc": "1963-09-10T22:49:10Z", "ms": -199069849930.12393 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-09-09", "window": { "start": { "local": "1963-09-09T19:18:00+08:00", "utc": "1963-09-09T11:18:00Z", "ms": -199197719565.8826 }, "end": { "local": "1963-09-09T20:49:35+08:00", "utc": "1963-09-09T12:49:35Z", "ms": -199192225446.49564 } }, "covered_min": 0, "window_min": 92, "qualifies": false }, { "local_date": "1963-09-10", "window": { "start": { "local": "1963-09-10T19:16:45+08:00", "utc": "1963-09-10T11:16:45Z", "ms": -199111394718.72318 }, "end": { "local": "1963-09-10T20:48:34+08:00", "utc": "1963-09-10T12:48:34Z", "ms": -199105886081.75375 } }, "covered_min": 92, "window_min": 92, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 08:41 on Tue 10 Sep to 06:49 on Wed 11 Sep.", "fact": "1963-09-10T00:41:02Z → 1963-09-10T22:49:10Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:18–20:50 on the 9th, 19:17–20:49 on the 10th.", "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 92 minutes on the 9th and 92 of 92 on the 10th.", "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 36036 s" }, { "step": "ruling", "text": "Jitāṣṭamī, Chengdu, 1963: Tuesday 10 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "jitashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Mahalaksmi vrata samapana (current at moonrise), Jitastami (pradosa), Jimutavahana puja" } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-09-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-10", "confidence": "determinate" } ], "quote": "In Chengdu, Jitāṣṭamī (Jitiya) 1963 falls on Tuesday 10 September. Aṣṭamī runs from 08:41 on Tue 10 Sep to 06:49 on Wed 11 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/mahalakshmi-vrata-samapana", "festival": "mahalakshmi-vrata-samapana", "name": "Mahālakṣmī Vrata Samāpana", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23668, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-09-10T08:41:02+08:00", "utc": "1963-09-10T00:41:02Z", "ms": -199149537986.5565 }, "end": { "local": "1963-09-11T06:49:10+08:00", "utc": "1963-09-10T22:49:10Z", "ms": -199069849930.12393 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-10T08:41:02+08:00", "utc": "1963-09-10T00:41:02Z", "ms": -199149537986.5565 }, "end": { "local": "1963-09-11T06:49:10+08:00", "utc": "1963-09-10T22:49:10Z", "ms": -199069849930.12393 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-09-09", "window": { "start": { "local": "1963-09-09T23:26:07+08:00", "utc": "1963-09-09T15:26:07Z", "ms": -199182832871.10117 }, "end": { "local": "1963-09-09T23:26:07+08:00", "utc": "1963-09-09T15:26:07Z", "ms": -199182832871.10117 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-09-10", "window": { "start": { "local": "1963-09-11T00:14:42+08:00", "utc": "1963-09-10T16:14:42Z", "ms": -199093517871.35468 }, "end": { "local": "1963-09-11T00:14:42+08:00", "utc": "1963-09-10T16:14:42Z", "ms": -199093517871.35468 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 08:41 on Tue 10 Sep to 06:49 on Wed 11 Sep.", "fact": "1963-09-10T00:41:02Z → 1963-09-10T22:49:10Z" }, { "step": "kaala", "text": "Moonrise is at 23:26 on the 9th and 00:15 on the 10th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is not on the 9th and is on the 10th.", "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 23668 s" }, { "step": "ruling", "text": "Mahālakṣmī Vrata Samāpana, Chengdu, 1963: Tuesday 10 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "mahalakshmi-vrata-samapana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Mahalaksmi vrata samapana (current at moonrise), Jitastami (pradosa), Jimutavahana puja" } ], "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-09-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-10", "confidence": "determinate" } ], "quote": "In Chengdu, Mahālakṣmī Vrata Samāpana 1963 falls on Tuesday 10 September. Aṣṭamī runs from 08:41 on Tue 10 Sep to 06:49 on Wed 11 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-09-13", "festival": "ekadashi", "name": "Indirā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8907, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-09-13T04:18:01+08:00", "utc": "1963-09-12T20:18:01Z", "ms": -198906119295.42734 }, "end": { "local": "1963-09-14T03:38:23+08:00", "utc": "1963-09-13T19:38:23Z", "ms": -198822096624.9816 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-13T04:18:01+08:00", "utc": "1963-09-12T20:18:01Z", "ms": -198906119295.42734 }, "end": { "local": "1963-09-14T03:38:23+08:00", "utc": "1963-09-13T19:38:23Z", "ms": -198822096624.9816 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-09-13", "window": { "start": { "local": "1963-09-13T06:46:28+08:00", "utc": "1963-09-12T22:46:28Z", "ms": -198897212458.78616 }, "end": { "local": "1963-09-13T06:46:28+08:00", "utc": "1963-09-12T22:46:28Z", "ms": -198897212458.78616 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-09-14", "window": { "start": { "local": "1963-09-14T06:47:01+08:00", "utc": "1963-09-13T22:47:01Z", "ms": -198810778687.53552 }, "end": { "local": "1963-09-14T06:47:01+08:00", "utc": "1963-09-13T22:47:01Z", "ms": -198810778687.53552 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 04:18 on Fri 13 Sep to 03:38 on Sat 14 Sep.", "fact": "1963-09-12T20:18:01Z → 1963-09-13T19:38:23Z" }, { "step": "kaala", "text": "Sunrise is at 06:46 on the 13th and 06:47 on the 14th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 13th and is not 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 8907 s" }, { "step": "ruling", "text": "Indirā Ekādaśī, Chengdu, 1963: Friday 13 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ekadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The general rule prevalent in most part of India is that it is to be observed on the day when the tithi is current at sunrise. If it occurs on two successive days, it is to be observed on the second day. When does not occur on any day, it is to be observed on the day of the tithi, but widows and sannyasins would observe on the next-day." } ], "not_evaluated": "The next-day observance for widows and sannyāsins, the Bengal avoidance of an ekādaśī joined to daśamī, and the Vaiṣṇava aruṇodaya rule belong to other traditions and are not applied.", "kaala": "sunrise", "priority": "paraviddha", "when_absent": "tithi-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-09-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-13", "confidence": "determinate" } ], "quote": "In Chengdu, Indirā Ekādaśī 1963 falls on Friday 13 September. Ekādaśī runs from 04:18 on Fri 13 Sep to 03:38 on Sat 14 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-09-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-09-15", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23843, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-09-15T03:21:53+08:00", "utc": "1963-09-14T19:21:53Z", "ms": -198736687489.80746 }, "end": { "local": "1963-09-16T03:28:09+08:00", "utc": "1963-09-15T19:28:09Z", "ms": -198649911115.82202 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-15T03:21:53+08:00", "utc": "1963-09-14T19:21:53Z", "ms": -198736687489.80746 }, "end": { "local": "1963-09-16T03:28:09+08:00", "utc": "1963-09-15T19:28:09Z", "ms": -198649911115.82202 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-09-14", "window": { "start": { "local": "1963-09-14T19:11:42+08:00", "utc": "1963-09-14T11:11:42Z", "ms": -198766097545.82617 }, "end": { "local": "1963-09-14T20:44:29+08:00", "utc": "1963-09-14T12:44:29Z", "ms": -198760530524.50232 } }, "covered_min": 0, "window_min": 93, "qualifies": false }, { "local_date": "1963-09-15", "window": { "start": { "local": "1963-09-15T19:10:26+08:00", "utc": "1963-09-15T11:10:26Z", "ms": -198679773679.03775 }, "end": { "local": "1963-09-15T20:43:28+08:00", "utc": "1963-09-15T12:43:28Z", "ms": -198674191994.48807 } }, "covered_min": 93, "window_min": 93, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 03:22 on Sun 15 Sep to 03:28 on Mon 16 Sep.", "fact": "1963-09-14T19:21:53Z → 1963-09-15T19:28:09Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:12–20:44 on the 14th, 19:10–20:43 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 0 of 93 minutes on the 14th and 93 of 93 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 23843 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Sunday 15 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": "1963-09-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-15", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Sunday 15 September. Trayodaśī runs from 03:22 on Sun 15 Sep to 03:28 on Mon 16 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-09-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-09-16", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7491, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-09-16T03:28:09+08:00", "utc": "1963-09-15T19:28:09Z", "ms": -198649911115.82202 }, "end": { "local": "1963-09-17T03:57:30+08:00", "utc": "1963-09-16T19:57:30Z", "ms": -198561750162.45016 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-16T03:28:09+08:00", "utc": "1963-09-15T19:28:09Z", "ms": -198649911115.82202 }, "end": { "local": "1963-09-17T03:57:30+08:00", "utc": "1963-09-16T19:57:30Z", "ms": -198561750162.45016 } }, "kaala": "nishita", "days": [ { "local_date": "1963-09-15", "window": { "start": { "local": "1963-09-16T00:35:18+08:00", "utc": "1963-09-15T16:35:18Z", "ms": -198660282361.9764 }, "end": { "local": "1963-09-16T01:23:18+08:00", "utc": "1963-09-15T17:23:18Z", "ms": -198657402361.9764 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-09-16", "window": { "start": { "local": "1963-09-17T00:34:56+08:00", "utc": "1963-09-16T16:34:56Z", "ms": -198573903545.16153 }, "end": { "local": "1963-09-17T01:22:56+08:00", "utc": "1963-09-16T17:22:56Z", "ms": -198571023545.16153 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 03:28 on Mon 16 Sep to 03:57 on Tue 17 Sep.", "fact": "1963-09-15T19:28:09Z → 1963-09-16T19:57:30Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:35–01:23 on the 15th, 00:35–01:23 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 7491 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Monday 16 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": "1963-09-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-16", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Monday 16 September. Caturdaśī runs from 03:28 on Mon 16 Sep to 03:57 on Tue 17 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-09-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/mahalaya-amavasya", "festival": "mahalaya-amavasya", "name": "Mahālaya Amāvāsyā", "everyday": "Sarvapitṛ Amāvāsyā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33659, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1963-09-17T03:57:30+08:00", "utc": "1963-09-16T19:57:30Z", "ms": -198561750162.45016 }, "end": { "local": "1963-09-18T04:50:43+08:00", "utc": "1963-09-17T20:50:43Z", "ms": -198472157416.6468 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-17T03:57:30+08:00", "utc": "1963-09-16T19:57:30Z", "ms": -198561750162.45016 }, "end": { "local": "1963-09-18T04:50:43+08:00", "utc": "1963-09-17T20:50:43Z", "ms": -198472157416.6468 } }, "kaala": "aparahna", "days": [ { "local_date": "1963-09-17", "window": { "start": { "local": "1963-09-17T14:12:13+08:00", "utc": "1963-09-17T06:12:13Z", "ms": -198524866633.20212 }, "end": { "local": "1963-09-17T16:40:04+08:00", "utc": "1963-09-17T08:40:04Z", "ms": -198515996458.57062 } }, "covered_min": 148, "window_min": 148, "qualifies": true }, { "local_date": "1963-09-18", "window": { "start": { "local": "1963-09-18T14:11:41+08:00", "utc": "1963-09-18T06:11:41Z", "ms": -198438498909.68695 }, "end": { "local": "1963-09-18T16:39:09+08:00", "utc": "1963-09-18T08:39:09Z", "ms": -198429650808.1619 } }, "covered_min": 0, "window_min": 147, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 03:57 on Tue 17 Sep to 04:51 on Wed 18 Sep.", "fact": "1963-09-16T19:57:30Z → 1963-09-17T20:50:43Z" }, { "step": "kaala", "text": "Aparāhṇa is 10th to 12th of 15 day muhūrtas: 14:12–16:40 on the 17th, 14:12–16:39 on the 18th.", "fact": "aparahna: day-muhurta-10-12 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during aparāhṇa. It covers 148 of 148 minutes on the 17th and 0 of 147 on the 18th.", "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 33659 s" }, { "step": "ruling", "text": "Mahālaya Amāvāsyā, Chengdu, 1963: Tuesday 17 September.", "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": "1963-09-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-17", "confidence": "determinate" } ], "quote": "In Chengdu, Mahālaya Amāvāsyā 1963 falls on Tuesday 17 September. Amāvasyā runs from 03:57 on Tue 17 Sep to 04:51 on Wed 18 Sep and covers all of aparāhṇa that afternoon.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/navaratra-arambha", "festival": "navaratra-arambha", "name": "Navarātrārambha", "everyday": "Navratri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23101, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1963-09-18T04:50:43+08:00", "utc": "1963-09-17T20:50:43Z", "ms": -198472157416.6468 }, "end": { "local": "1963-09-19T06:08:35+08:00", "utc": "1963-09-18T22:08:35Z", "ms": -198381085481.58954 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-18T04:50:43+08:00", "utc": "1963-09-17T20:50:43Z", "ms": -198472157416.6468 }, "end": { "local": "1963-09-19T06:08:35+08:00", "utc": "1963-09-18T22:08:35Z", "ms": -198381085481.58954 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-09-18", "window": { "start": { "local": "1963-09-18T12:33:57+08:00", "utc": "1963-09-18T04:33:57Z", "ms": -198444362960.44946 }, "end": { "local": "1963-09-18T13:21:57+08:00", "utc": "1963-09-18T05:21:57Z", "ms": -198441482960.44946 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-09-19", "window": { "start": { "local": "1963-09-19T12:33:36+08:00", "utc": "1963-09-19T04:33:36Z", "ms": -198357984192.24323 }, "end": { "local": "1963-09-19T13:21:36+08:00", "utc": "1963-09-19T05:21:36Z", "ms": -198355104192.24323 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 04:51 on Wed 18 Sep to 06:09 on Thu 19 Sep.", "fact": "1963-09-17T20:50:43Z → 1963-09-18T22:08:35Z" }, { "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": "Pratipadā 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. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 23101 s" }, { "step": "ruling", "text": "Navarātrārambha, Chengdu, 1963: Wednesday 18 September.", "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": "1963-09-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-18", "confidence": "determinate" } ], "quote": "In Chengdu, Navarātrārambha (Navratri) 1963 falls on Wednesday 18 September. Pratipadā runs from 04:51 on Wed 18 Sep to 06:09 on Thu 19 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-09-21", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 781, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-09-21T09:56:17+08:00", "utc": "1963-09-21T01:56:17Z", "ms": -198194623044.3554 }, "end": { "local": "1963-09-22T12:19:31+08:00", "utc": "1963-09-22T04:19:31Z", "ms": -198099628628.03348 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-21T09:56:17+08:00", "utc": "1963-09-21T01:56:17Z", "ms": -198194623044.3554 }, "end": { "local": "1963-09-22T12:19:31+08:00", "utc": "1963-09-22T04:19:31Z", "ms": -198099628628.03348 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-09-21", "window": { "start": { "local": "1963-09-21T12:32:53+08:00", "utc": "1963-09-21T04:32:53Z", "ms": -198185226563.11243 }, "end": { "local": "1963-09-21T13:20:53+08:00", "utc": "1963-09-21T05:20:53Z", "ms": -198182346563.11243 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-09-22", "window": { "start": { "local": "1963-09-22T12:32:32+08:00", "utc": "1963-09-22T04:32:32Z", "ms": -198098847666.99304 }, "end": { "local": "1963-09-22T13:20:32+08:00", "utc": "1963-09-22T05:20:32Z", "ms": -198095967666.99304 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 09:56 on Sat 21 Sep to 12:20 on Sun 22 Sep.", "fact": "1963-09-21T01:56:17Z → 1963-09-22T04:19:31Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:33–13:21 on the 21st, 12:33–13:21 on the 22nd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 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. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 781 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Saturday 21 September.", "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": "1963-09-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-21", "confidence": "boundary" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Saturday 21 September. Caturthī runs from 09:56 on Sat 21 Sep to 12:20 on Sun 22 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-09-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/durga-saptami", "festival": "durga-saptami", "name": "Durgā Saptamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34979, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1963-09-24T17:24:06+08:00", "utc": "1963-09-24T09:24:06Z", "ms": -197908554053.4475 }, "end": { "local": "1963-09-25T19:40:20+08:00", "utc": "1963-09-25T11:40:20Z", "ms": -197813979709.21036 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-24T17:24:06+08:00", "utc": "1963-09-24T09:24:06Z", "ms": -197908554053.4475 }, "end": { "local": "1963-09-25T19:40:20+08:00", "utc": "1963-09-25T11:40:20Z", "ms": -197813979709.21036 } }, "kaala": "udaya-1", "days": [ { "local_date": "1963-09-24", "window": { "start": { "local": "1963-09-24T06:52:42+08:00", "utc": "1963-09-23T22:52:42Z", "ms": -197946437899.46042 }, "end": { "local": "1963-09-24T07:41:07+08:00", "utc": "1963-09-23T23:41:07Z", "ms": -197943532795.58557 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-09-25", "window": { "start": { "local": "1963-09-25T06:53:17+08:00", "utc": "1963-09-24T22:53:17Z", "ms": -197860003311.43866 }, "end": { "local": "1963-09-25T07:41:34+08:00", "utc": "1963-09-24T23:41:34Z", "ms": -197857105594.19788 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 17:24 on Tue 24 Sep to 19:40 on Wed 25 Sep.", "fact": "1963-09-24T09:24:06Z → 1963-09-25T11:40:20Z" }, { "step": "kaala", "text": "The first muhūrta after sunrise is 1st of 15 day muhūrtas: 06:53–07:41 on the 24th, 06:53–07:42 on the 25th.", "fact": "udaya-1: day-muhurta-1-1 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must hold through the first muhūrta after sunrise. It covers 0 of 48 minutes on the 24th and 48 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one morning qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 34979 s" }, { "step": "ruling", "text": "Durgā Saptamī, Chengdu, 1963: Wednesday 25 September.", "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": "1963-09-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-25", "confidence": "determinate" } ], "quote": "In Chengdu, Durgā Saptamī 1963 falls on Wednesday 25 September. Saptamī runs from 17:24 on Tue 24 Sep to 19:40 on Wed 25 Sep and covers all of the first muhūrta after sunrise that morning.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/mahashtami", "festival": "mahashtami", "name": "Mahāṣṭamī", "everyday": "Durga Ashtami", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22851, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-09-25T19:40:20+08:00", "utc": "1963-09-25T11:40:20Z", "ms": -197813979709.21036 }, "end": { "local": "1963-09-26T21:27:30+08:00", "utc": "1963-09-26T13:27:30Z", "ms": -197721149739.74274 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-25T19:40:20+08:00", "utc": "1963-09-25T11:40:20Z", "ms": -197813979709.21036 }, "end": { "local": "1963-09-26T21:27:30+08:00", "utc": "1963-09-26T13:27:30Z", "ms": -197721149739.74274 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-09-25", "window": { "start": { "local": "1963-09-25T12:31:30+08:00", "utc": "1963-09-25T04:31:30Z", "ms": -197839710432.1328 }, "end": { "local": "1963-09-25T13:19:30+08:00", "utc": "1963-09-25T05:19:30Z", "ms": -197836830432.1328 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-09-26", "window": { "start": { "local": "1963-09-26T12:31:09+08:00", "utc": "1963-09-26T04:31:09Z", "ms": -197753331107.97177 }, "end": { "local": "1963-09-26T13:19:09+08:00", "utc": "1963-09-26T05:19:09Z", "ms": -197750451107.97177 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 19:40 on Wed 25 Sep to 21:28 on Thu 26 Sep.", "fact": "1963-09-25T11:40:20Z → 1963-09-26T13:27:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:31–13:19 on the 25th, 12:31–13:19 on the 26th.", "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 25th and 48 of 48 on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 22851 s" }, { "step": "ruling", "text": "Mahāṣṭamī, Chengdu, 1963: Thursday 26 September.", "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": "1963-09-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-26", "confidence": "determinate" } ], "quote": "In Chengdu, Mahāṣṭamī (Durga Ashtami) 1963 falls on Thursday 26 September. Aṣṭamī runs from 19:40 on Wed 25 Sep to 21:28 on Thu 26 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/mahanavami", "festival": "mahanavami", "name": "Mahānavamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29301, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1963-09-26T21:27:30+08:00", "utc": "1963-09-26T13:27:30Z", "ms": -197721149739.74274 }, "end": { "local": "1963-09-27T22:33:50+08:00", "utc": "1963-09-27T14:33:50Z", "ms": -197630770157.80035 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-26T21:27:30+08:00", "utc": "1963-09-26T13:27:30Z", "ms": -197721149739.74274 }, "end": { "local": "1963-09-27T22:33:50+08:00", "utc": "1963-09-27T14:33:50Z", "ms": -197630770157.80035 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-09-26", "window": { "start": { "local": "1963-09-26T12:31:09+08:00", "utc": "1963-09-26T04:31:09Z", "ms": -197753331107.97177 }, "end": { "local": "1963-09-26T13:19:09+08:00", "utc": "1963-09-26T05:19:09Z", "ms": -197750451107.97177 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-09-27", "window": { "start": { "local": "1963-09-27T12:30:48+08:00", "utc": "1963-09-27T04:30:48Z", "ms": -197666951627.89606 }, "end": { "local": "1963-09-27T13:18:48+08:00", "utc": "1963-09-27T05:18:48Z", "ms": -197664071627.89606 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 21:28 on Thu 26 Sep to 22:34 on Fri 27 Sep.", "fact": "1963-09-26T13:27:30Z → 1963-09-27T14:33:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:31–13:19 on the 26th, 12:31–13:19 on the 27th.", "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 26th and 48 of 48 on the 27th.", "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 29301 s" }, { "step": "ruling", "text": "Mahānavamī, Chengdu, 1963: Friday 27 September.", "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": "1963-09-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-27", "confidence": "determinate" } ], "quote": "In Chengdu, Mahānavamī 1963 falls on Friday 27 September. Navamī runs from 21:28 on Thu 26 Sep to 22:34 on Fri 27 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vijaya-dashami", "festival": "vijaya-dashami", "name": "Vijayā Daśamī", "everyday": "Dussehra", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4890, "anga": { "type": "tithi", "index": 9, "key": "dashami", "name": "Daśamī", "start": { "local": "1963-09-27T22:33:50+08:00", "utc": "1963-09-27T14:33:50Z", "ms": -197630770157.80035 }, "end": { "local": "1963-09-28T22:51:26+08:00", "utc": "1963-09-28T14:51:26Z", "ms": -197543314131.0376 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-27T22:33:50+08:00", "utc": "1963-09-27T14:33:50Z", "ms": -197630770157.80035 }, "end": { "local": "1963-09-28T22:51:26+08:00", "utc": "1963-09-28T14:51:26Z", "ms": -197543314131.0376 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-09-27", "window": { "start": { "local": "1963-09-27T12:30:48+08:00", "utc": "1963-09-27T04:30:48Z", "ms": -197666951627.89606 }, "end": { "local": "1963-09-27T13:18:48+08:00", "utc": "1963-09-27T05:18:48Z", "ms": -197664071627.89606 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-09-28", "window": { "start": { "local": "1963-09-28T12:30:28+08:00", "utc": "1963-09-28T04:30:28Z", "ms": -197580571971.34363 }, "end": { "local": "1963-09-28T13:18:28+08:00", "utc": "1963-09-28T05:18:28Z", "ms": -197577691971.34363 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Daśamī runs from 22:34 on Fri 27 Sep to 22:51 on Sat 28 Sep.", "fact": "1963-09-27T14:33:50Z → 1963-09-28T14:51:26Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:31–13:19 on the 27th, 12:30–13:18 on the 28th.", "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 27th and 48 of 48 on the 28th.", "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 4890 s" }, { "step": "ruling", "text": "Vijayā Daśamī, Chengdu, 1963: Saturday 28 September.", "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": "1963-09-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-28", "confidence": "determinate" } ], "quote": "In Chengdu, Vijayā Daśamī (Dussehra) 1963 falls on Saturday 28 September. Daśamī touches Śravaṇa in the day time on neither day, so madhyāhna decides. Daśamī runs from 22:34 on Fri 27 Sep to 22:51 on Sat 28 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-09-29", "festival": "ekadashi", "name": "Pāśāṅkuśā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29051, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-09-28T22:51:26+08:00", "utc": "1963-09-28T14:51:26Z", "ms": -197543314131.0376 }, "end": { "local": "1963-09-29T22:17:11+08:00", "utc": "1963-09-29T14:17:11Z", "ms": -197458969146.58044 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-28T22:51:26+08:00", "utc": "1963-09-28T14:51:26Z", "ms": -197543314131.0376 }, "end": { "local": "1963-09-29T22:17:11+08:00", "utc": "1963-09-29T14:17:11Z", "ms": -197458969146.58044 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-09-29", "window": { "start": { "local": "1963-09-29T06:55:37+08:00", "utc": "1963-09-28T22:55:37Z", "ms": -197514263493.3248 }, "end": { "local": "1963-09-29T06:55:37+08:00", "utc": "1963-09-28T22:55:37Z", "ms": -197514263493.3248 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-09-30", "window": { "start": { "local": "1963-09-30T06:56:12+08:00", "utc": "1963-09-29T22:56:12Z", "ms": -197427828108.1618 }, "end": { "local": "1963-09-30T06:56:12+08:00", "utc": "1963-09-29T22:56:12Z", "ms": -197427828108.1618 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 22:51 on Sat 28 Sep to 22:17 on Sun 29 Sep.", "fact": "1963-09-28T14:51:26Z → 1963-09-29T14:17:11Z" }, { "step": "kaala", "text": "Sunrise is at 06:56 on the 29th and 06:56 on the 30th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 29th and is not on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 29051 s" }, { "step": "ruling", "text": "Pāśāṅkuśā Ekādaśī, Chengdu, 1963: Sunday 29 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": "1963-09-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-29", "confidence": "determinate" } ], "quote": "In Chengdu, Pāśāṅkuśā Ekādaśī 1963 falls on Sunday 29 September. Ekādaśī runs from 22:51 on Sat 28 Sep to 22:17 on Sun 29 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-09-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-09-30", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-09-30", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 422, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-09-30T20:52:37+08:00", "utc": "1963-09-30T12:52:37Z", "ms": -197377643396.9847 }, "end": { "local": "1963-10-01T18:43:07+08:00", "utc": "1963-10-01T10:43:07Z", "ms": -197299013100.36746 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1963-09-30T20:52:37+08:00", "utc": "1963-09-30T12:52:37Z", "ms": -197377643396.9847 }, "end": { "local": "1963-10-01T18:43:07+08:00", "utc": "1963-10-01T10:43:07Z", "ms": -197299013100.36746 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-09-30", "window": { "start": { "local": "1963-09-30T18:51:24+08:00", "utc": "1963-09-30T10:51:24Z", "ms": -197384915978.29285 }, "end": { "local": "1963-09-30T20:28:07+08:00", "utc": "1963-09-30T12:28:07Z", "ms": -197379112850.81168 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "1963-10-01", "window": { "start": { "local": "1963-10-01T18:50:09+08:00", "utc": "1963-10-01T10:50:09Z", "ms": -197298590931.56064 }, "end": { "local": "1963-10-01T20:27:07+08:00", "utc": "1963-10-01T12:27:07Z", "ms": -197292773036.57303 } }, "covered_min": 0, "window_min": 97, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:53 on Mon 30 Sep to 18:43 on Tue 1 Oct.", "fact": "1963-09-30T12:52:37Z → 1963-10-01T10:43:07Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:51–20:28 on the 30th, 18:50–20:27 on the 1st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 97 minutes on the 30th and 0 of 97 on the 1st.", "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 422 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Monday 30 September.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-09-30", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-09-30", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Monday 30 September. Trayodaśī runs from 20:53 on Mon 30 Sep to 18:43 on Tue 1 Oct, and reaches pradoṣa on neither day.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-09-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/karaka-chaturthi", "festival": "karaka-chaturthi", "name": "Karaka Caturthī", "everyday": "Karwa Chauth", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5945, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-10-06T02:12:42+08:00", "utc": "1963-10-05T18:12:42Z", "ms": -196926438301.8232 }, "end": { "local": "1963-10-06T22:59:44+08:00", "utc": "1963-10-06T14:59:44Z", "ms": -196851616303.48694 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-06T02:12:42+08:00", "utc": "1963-10-05T18:12:42Z", "ms": -196926438301.8232 }, "end": { "local": "1963-10-06T22:59:44+08:00", "utc": "1963-10-06T14:59:44Z", "ms": -196851616303.48694 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-10-05", "window": { "start": { "local": "1963-10-05T20:36:10+08:00", "utc": "1963-10-05T12:36:10Z", "ms": -196946630049.71936 }, "end": { "local": "1963-10-05T20:36:10+08:00", "utc": "1963-10-05T12:36:10Z", "ms": -196946630049.71936 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-10-06", "window": { "start": { "local": "1963-10-06T21:20:39+08:00", "utc": "1963-10-06T13:20:39Z", "ms": -196857560998.17294 }, "end": { "local": "1963-10-06T21:20:39+08:00", "utc": "1963-10-06T13:20:39Z", "ms": -196857560998.17294 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:13 on Sun 6 Oct to 23:00 on Sun 6 Oct.", "fact": "1963-10-05T18:12:42Z → 1963-10-06T14:59:44Z" }, { "step": "kaala", "text": "Moonrise is at 20:36 on the 5th and 21:21 on the 6th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 5th and is on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 5945 s" }, { "step": "ruling", "text": "Karaka Caturthī, Chengdu, 1963: Sunday 6 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": "1963-10-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-06", "confidence": "determinate" } ], "quote": "In Chengdu, Karaka Caturthī (Karwa Chauth) 1963 falls on Sunday 6 October. Caturthī runs from 02:13 on Sun 6 Oct to 23:00 on Sun 6 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-10-06", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5945, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-10-06T02:12:42+08:00", "utc": "1963-10-05T18:12:42Z", "ms": -196926438301.8232 }, "end": { "local": "1963-10-06T22:59:44+08:00", "utc": "1963-10-06T14:59:44Z", "ms": -196851616303.48694 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-06T02:12:42+08:00", "utc": "1963-10-05T18:12:42Z", "ms": -196926438301.8232 }, "end": { "local": "1963-10-06T22:59:44+08:00", "utc": "1963-10-06T14:59:44Z", "ms": -196851616303.48694 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-10-05", "window": { "start": { "local": "1963-10-05T20:36:10+08:00", "utc": "1963-10-05T12:36:10Z", "ms": -196946630049.71936 }, "end": { "local": "1963-10-05T20:36:10+08:00", "utc": "1963-10-05T12:36:10Z", "ms": -196946630049.71936 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-10-06", "window": { "start": { "local": "1963-10-06T21:20:39+08:00", "utc": "1963-10-06T13:20:39Z", "ms": -196857560998.17294 }, "end": { "local": "1963-10-06T21:20:39+08:00", "utc": "1963-10-06T13:20:39Z", "ms": -196857560998.17294 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:13 on Sun 6 Oct to 23:00 on Sun 6 Oct.", "fact": "1963-10-05T18:12:42Z → 1963-10-06T14:59:44Z" }, { "step": "kaala", "text": "Moonrise is at 20:36 on the 5th and 21:21 on the 6th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 5th and is on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5945 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Sunday 6 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": "1963-10-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-06", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Sunday 6 October. Caturthī runs from 02:13 on Sun 6 Oct to 23:00 on Sun 6 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-10-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ahoyi-ashtami", "festival": "ahoyi-ashtami", "name": "Ahoyī Aṣṭamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28366, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-10-09T16:06:03+08:00", "utc": "1963-10-09T08:06:03Z", "ms": -196617237046.91507 }, "end": { "local": "1963-10-10T14:57:00+08:00", "utc": "1963-10-10T06:57:00Z", "ms": -196534979775.25644 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-09T16:06:03+08:00", "utc": "1963-10-09T08:06:03Z", "ms": -196617237046.91507 }, "end": { "local": "1963-10-10T14:57:00+08:00", "utc": "1963-10-10T06:57:00Z", "ms": -196534979775.25644 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-10-09", "window": { "start": { "local": "1963-10-09T23:58:49+08:00", "utc": "1963-10-09T15:58:49Z", "ms": -196588871175.81897 }, "end": { "local": "1963-10-09T23:58:49+08:00", "utc": "1963-10-09T15:58:49Z", "ms": -196588871175.81897 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-10-10", "window": { "start": { "local": "1963-10-11T00:57:53+08:00", "utc": "1963-10-10T16:57:53Z", "ms": -196498927428.5626 }, "end": { "local": "1963-10-11T00:57:53+08:00", "utc": "1963-10-10T16:57:53Z", "ms": -196498927428.5626 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 16:06 on Wed 9 Oct to 14:57 on Thu 10 Oct.", "fact": "1963-10-09T08:06:03Z → 1963-10-10T06:57:00Z" }, { "step": "kaala", "text": "Moonrise is at 23:59 on the 9th and 00:58 on the 10th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is on the 9th and is not on the 10th.", "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 28366 s" }, { "step": "ruling", "text": "Ahoyī Aṣṭamī, Chengdu, 1963: Wednesday 9 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": "1963-10-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-09", "confidence": "determinate" } ], "quote": "In Chengdu, Ahoyī Aṣṭamī 1963 falls on Wednesday 9 October. Aṣṭamī runs from 16:06 on Wed 9 Oct to 14:57 on Thu 10 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-10-13", "festival": "ekadashi", "name": "Ramā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 26359, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-10-12T14:22:56+08:00", "utc": "1963-10-12T06:22:56Z", "ms": -196364223505.00745 }, "end": { "local": "1963-10-13T14:52:11+08:00", "utc": "1963-10-13T06:52:11Z", "ms": -196276069196.14905 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-12T14:22:56+08:00", "utc": "1963-10-12T06:22:56Z", "ms": -196364223505.00745 }, "end": { "local": "1963-10-13T14:52:11+08:00", "utc": "1963-10-13T06:52:11Z", "ms": -196276069196.14905 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-10-12", "window": { "start": { "local": "1963-10-12T07:03:37+08:00", "utc": "1963-10-11T23:03:37Z", "ms": -196390582984.6724 }, "end": { "local": "1963-10-12T07:03:37+08:00", "utc": "1963-10-11T23:03:37Z", "ms": -196390582984.6724 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-10-13", "window": { "start": { "local": "1963-10-13T07:04:16+08:00", "utc": "1963-10-12T23:04:16Z", "ms": -196304143741.7608 }, "end": { "local": "1963-10-13T07:04:16+08:00", "utc": "1963-10-12T23:04:16Z", "ms": -196304143741.7608 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 14:23 on Sat 12 Oct to 14:52 on Sun 13 Oct.", "fact": "1963-10-12T06:22:56Z → 1963-10-13T06:52:11Z" }, { "step": "kaala", "text": "Sunrise is at 07:04 on the 12th and 07:04 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 26359 s" }, { "step": "ruling", "text": "Ramā Ekādaśī, Chengdu, 1963: Sunday 13 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": "1963-10-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-13", "confidence": "determinate" } ], "quote": "In Chengdu, Ramā Ekādaśī 1963 falls on Sunday 13 October. Ekādaśī runs from 14:23 on Sat 12 Oct to 14:52 on Sun 13 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-10-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/govatsa-dvadashi", "festival": "govatsa-dvadashi", "name": "Govatsa Dvādaśī", "everyday": "Vasu Baras", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10022, "anga": { "type": "tithi", "index": 26, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1963-10-13T14:52:11+08:00", "utc": "1963-10-13T06:52:11Z", "ms": -196276069196.14905 }, "end": { "local": "1963-10-14T15:47:33+08:00", "utc": "1963-10-14T07:47:33Z", "ms": -196186347243.76498 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-13T14:52:11+08:00", "utc": "1963-10-13T06:52:11Z", "ms": -196276069196.14905 }, "end": { "local": "1963-10-14T15:47:33+08:00", "utc": "1963-10-14T07:47:33Z", "ms": -196186347243.76498 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-10-13", "window": { "start": { "local": "1963-10-13T18:35:43+08:00", "utc": "1963-10-13T10:35:43Z", "ms": -196262656836.84564 }, "end": { "local": "1963-10-13T20:15:37+08:00", "utc": "1963-10-13T12:15:37Z", "ms": -196256663141.87057 } }, "covered_min": 100, "window_min": 100, "qualifies": true }, { "local_date": "1963-10-14", "window": { "start": { "local": "1963-10-14T18:34:35+08:00", "utc": "1963-10-14T10:34:35Z", "ms": -196176325292.6947 }, "end": { "local": "1963-10-14T20:14:43+08:00", "utc": "1963-10-14T12:14:43Z", "ms": -196170317137.44962 } }, "covered_min": 0, "window_min": 100, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 14:52 on Sun 13 Oct to 15:48 on Mon 14 Oct.", "fact": "1963-10-13T06:52:11Z → 1963-10-14T07:47:33Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:36–20:16 on the 13th, 18:35–20:15 on the 14th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during pradoṣa. It covers 100 of 100 minutes on the 13th and 0 of 100 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 10022 s" }, { "step": "ruling", "text": "Govatsa Dvādaśī, Chengdu, 1963: Sunday 13 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "govatsa-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 12 Govatsa dvadasi (pradosa vyapini). If occurs on two days, it is to be observed on the first day." } ], "kaala": "pradosha", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-10-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-13", "confidence": "determinate" } ], "quote": "In Chengdu, Govatsa Dvādaśī (Vasu Baras) 1963 falls on Sunday 13 October. Dvādaśī runs from 14:52 on Sun 13 Oct to 15:48 on Mon 14 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/yama-dipadana", "festival": "yama-dipadana", "name": "Yama Dīpadāna", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5252, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-10-14T15:47:33+08:00", "utc": "1963-10-14T07:47:33Z", "ms": -196186347243.76498 }, "end": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-14T15:47:33+08:00", "utc": "1963-10-14T07:47:33Z", "ms": -196186347243.76498 }, "end": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-10-14", "window": { "start": { "local": "1963-10-14T18:34:35+08:00", "utc": "1963-10-14T10:34:35Z", "ms": -196176325292.6947 }, "end": { "local": "1963-10-14T20:14:43+08:00", "utc": "1963-10-14T12:14:43Z", "ms": -196170317137.44962 } }, "covered_min": 100, "window_min": 100, "qualifies": true }, { "local_date": "1963-10-15", "window": { "start": { "local": "1963-10-15T18:33:27+08:00", "utc": "1963-10-15T10:33:27Z", "ms": -196089993048.17853 }, "end": { "local": "1963-10-15T20:13:50+08:00", "utc": "1963-10-15T12:13:50Z", "ms": -196083970475.01483 } }, "covered_min": 0, "window_min": 100, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 15:48 on Mon 14 Oct to 17:06 on Tue 15 Oct.", "fact": "1963-10-14T07:47:33Z → 1963-10-15T09:05:55Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:35–20:15 on the 14th, 18:33–20:14 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 100 of 100 minutes on the 14th and 0 of 100 on the 15th.", "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 5252 s" }, { "step": "ruling", "text": "Yama Dīpadāna, Chengdu, 1963: Monday 14 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "yama-dipadana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 13 Yama dipadana (pradosa)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-10-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-14", "confidence": "determinate" } ], "quote": "In Chengdu, Yama Dīpadāna 1963 falls on Monday 14 October. Trayodaśī runs from 15:48 on Mon 14 Oct to 17:06 on Tue 15 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/pradosha-vrata?on=1963-10-14", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5252, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-10-14T15:47:33+08:00", "utc": "1963-10-14T07:47:33Z", "ms": -196186347243.76498 }, "end": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-14T15:47:33+08:00", "utc": "1963-10-14T07:47:33Z", "ms": -196186347243.76498 }, "end": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-10-14", "window": { "start": { "local": "1963-10-14T18:34:35+08:00", "utc": "1963-10-14T10:34:35Z", "ms": -196176325292.6947 }, "end": { "local": "1963-10-14T20:14:43+08:00", "utc": "1963-10-14T12:14:43Z", "ms": -196170317137.44962 } }, "covered_min": 100, "window_min": 100, "qualifies": true }, { "local_date": "1963-10-15", "window": { "start": { "local": "1963-10-15T18:33:27+08:00", "utc": "1963-10-15T10:33:27Z", "ms": -196089993048.17853 }, "end": { "local": "1963-10-15T20:13:50+08:00", "utc": "1963-10-15T12:13:50Z", "ms": -196083970475.01483 } }, "covered_min": 0, "window_min": 100, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 15:48 on Mon 14 Oct to 17:06 on Tue 15 Oct.", "fact": "1963-10-14T07:47:33Z → 1963-10-15T09:05:55Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:35–20:15 on the 14th, 18:33–20:14 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 100 of 100 minutes on the 14th and 0 of 100 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 5252 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Monday 14 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": "1963-10-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-14", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Monday 14 October. Trayodaśī runs from 15:48 on Mon 14 Oct to 17:06 on Tue 15 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-10-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-10-15", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20444, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 }, "end": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 }, "end": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 } }, "kaala": "nishita", "days": [ { "local_date": "1963-10-15", "window": { "start": { "local": "1963-10-16T00:25:52+08:00", "utc": "1963-10-15T16:25:52Z", "ms": -196068848398.81464 }, "end": { "local": "1963-10-16T01:13:52+08:00", "utc": "1963-10-15T17:13:52Z", "ms": -196065968398.81464 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-10-16", "window": { "start": { "local": "1963-10-17T00:25:38+08:00", "utc": "1963-10-16T16:25:38Z", "ms": -195982461530.71295 }, "end": { "local": "1963-10-17T01:13:38+08:00", "utc": "1963-10-16T17:13:38Z", "ms": -195979581530.71295 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 17:06 on Tue 15 Oct to 18:45 on Wed 16 Oct.", "fact": "1963-10-15T09:05:55Z → 1963-10-16T10:44:55Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:26–01:14 on the 15th, 00:26–01:14 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 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. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 20444 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Tuesday 15 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": "1963-10-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-15", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Tuesday 15 October. Caturdaśī runs from 17:06 on Tue 15 Oct to 18:45 on Wed 16 Oct and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-10-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/naraka-chaturdashi", "festival": "naraka-chaturdashi", "name": "Naraka Caturdaśī", "everyday": "Choti Diwali", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36019, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 }, "end": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-15T17:05:55+08:00", "utc": "1963-10-15T09:05:55Z", "ms": -196095244928.5702 }, "end": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 } }, "kaala": "arunodaya", "days": [ { "local_date": "1963-10-15", "window": { "start": { "local": "1963-10-15T05:25:28+08:00", "utc": "1963-10-14T21:25:28Z", "ms": -196137272283.6016 }, "end": { "local": "1963-10-15T07:05:36+08:00", "utc": "1963-10-14T23:05:36Z", "ms": -196131264128.3565 } }, "covered_min": 0, "window_min": 100, "qualifies": false }, { "local_date": "1963-10-16", "window": { "start": { "local": "1963-10-16T05:25:54+08:00", "utc": "1963-10-15T21:25:54Z", "ms": -196050846322.61444 }, "end": { "local": "1963-10-16T07:06:16+08:00", "utc": "1963-10-15T23:06:16Z", "ms": -196044823749.45074 } }, "covered_min": 100, "window_min": 100, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 17:06 on Tue 15 Oct to 18:45 on Wed 16 Oct.", "fact": "1963-10-15T09:05:55Z → 1963-10-16T10:44:55Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:25–07:06 on the 15th, 05:26–07:06 on the 16th.", "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 100 minutes on the 15th and 100 of 100 on the 16th.", "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 36019 s" }, { "step": "ruling", "text": "Naraka Caturdaśī, Chengdu, 1963: Wednesday 16 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "naraka-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 14 Naraka caturdasi (covering a period of 4 ghatikas before sunrise, if occurs on two successive days, it is to be observed on the first day)" } ], "kaala": "arunodaya", "priority": "purvaviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-16", "confidence": "determinate" } ], "quote": "In Chengdu, Naraka Caturdaśī (Choti Diwali) 1963 falls on Wednesday 16 October. Caturdaśī runs from 17:06 on Tue 15 Oct to 18:45 on Wed 16 Oct and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/kali-puja", "festival": "kali-puja", "name": "Kālī Pūjā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13366, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 }, "end": { "local": "1963-10-17T20:42:40+08:00", "utc": "1963-10-17T12:42:40Z", "ms": -195909440439.2278 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 }, "end": { "local": "1963-10-17T20:42:40+08:00", "utc": "1963-10-17T12:42:40Z", "ms": -195909440439.2278 } }, "kaala": "nishita", "days": [ { "local_date": "1963-10-16", "window": { "start": { "local": "1963-10-17T00:25:38+08:00", "utc": "1963-10-16T16:25:38Z", "ms": -195982461530.71295 }, "end": { "local": "1963-10-17T01:13:38+08:00", "utc": "1963-10-16T17:13:38Z", "ms": -195979581530.71295 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-10-17", "window": { "start": { "local": "1963-10-18T00:25:26+08:00", "utc": "1963-10-17T16:25:26Z", "ms": -195896074091.77246 }, "end": { "local": "1963-10-18T01:13:26+08:00", "utc": "1963-10-17T17:13:26Z", "ms": -195893194091.77246 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 18:45 on Wed 16 Oct to 20:43 on Thu 17 Oct.", "fact": "1963-10-16T10:44:55Z → 1963-10-17T12:42:40Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:26–01:14 on the 16th, 00:25–01:13 on the 17th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during niśītha. It covers 48 of 48 minutes on the 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 night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 13366 s" }, { "step": "ruling", "text": "Kālī Pūjā, Chengdu, 1963: Wednesday 16 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "kali-puja", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 30 Kali puja (nisithavyapini), Dipavali or Diwali (pradosa), Mahalaksmipuja (pradosa)" } ], "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-16", "confidence": "determinate" } ], "quote": "In Chengdu, Kālī Pūjā 1963 falls on Wednesday 16 October. Amāvasyā runs from 18:45 on Wed 16 Oct to 20:43 on Thu 17 Oct and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/diwali-lakshmi-puja", "festival": "diwali-lakshmi-puja", "name": "Lakṣmī Pūjā", "everyday": "Diwali", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-17", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 755, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 }, "end": { "local": "1963-10-17T20:42:40+08:00", "utc": "1963-10-17T12:42:40Z", "ms": -195909440439.2278 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-16T18:44:55+08:00", "utc": "1963-10-16T10:44:55Z", "ms": -196002905403.9881 }, "end": { "local": "1963-10-17T20:42:40+08:00", "utc": "1963-10-17T12:42:40Z", "ms": -195909440439.2278 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-10-16", "window": { "start": { "local": "1963-10-16T18:32:20+08:00", "utc": "1963-10-16T10:32:20Z", "ms": -196003660076.60406 }, "end": { "local": "1963-10-16T20:12:57+08:00", "utc": "1963-10-16T12:12:57Z", "ms": -195997623131.0331 } }, "covered_min": 88, "window_min": 101, "qualifies": true }, { "local_date": "1963-10-17", "window": { "start": { "local": "1963-10-17T18:31:14+08:00", "utc": "1963-10-17T10:31:14Z", "ms": -195917326351.32816 }, "end": { "local": "1963-10-17T20:12:05+08:00", "utc": "1963-10-17T12:12:05Z", "ms": -195911275082.1133 } }, "covered_min": 101, "window_min": 101, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 18:45 on Wed 16 Oct to 20:43 on Thu 17 Oct.", "fact": "1963-10-16T10:44:55Z → 1963-10-17T12:42:40Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:32–20:13 on the 16th, 18:31–20:12 on the 17th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during pradoṣa. It covers 88 of 101 minutes on the 16th and 101 of 101 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "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 755 s" }, { "step": "ruling", "text": "Lakṣmī Pūjā, Chengdu, 1963: Thursday 17 October.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "1963-10-17", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-16", "confidence": "boundary" } ], "quote": "In Chengdu, Lakṣmī Pūjā (Diwali) 1963 falls on Thursday 17 October. Amāvasyā runs from 18:45 on Wed 16 Oct to 20:43 on Thu 17 Oct and covers all of pradoṣa that evening. It also reaches the previous evening for 88 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/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-10-21", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20634, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-10-21T04:02:21+08:00", "utc": "1963-10-20T20:02:21Z", "ms": -195623858500.35846 }, "end": { "local": "1963-10-22T06:40:17+08:00", "utc": "1963-10-21T22:40:17Z", "ms": -195527983196.38443 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": true, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-21T04:02:21+08:00", "utc": "1963-10-20T20:02:21Z", "ms": -195623858500.35846 }, "end": { "local": "1963-10-22T06:40:17+08:00", "utc": "1963-10-21T22:40:17Z", "ms": -195527983196.38443 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-10-21", "window": { "start": { "local": "1963-10-21T12:24:20+08:00", "utc": "1963-10-21T04:24:20Z", "ms": -195593739705.8235 }, "end": { "local": "1963-10-21T13:12:20+08:00", "utc": "1963-10-21T05:12:20Z", "ms": -195590859705.8235 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-10-22", "window": { "start": { "local": "1963-10-22T12:24:11+08:00", "utc": "1963-10-22T04:24:11Z", "ms": -195507349400.3994 }, "end": { "local": "1963-10-22T13:12:11+08:00", "utc": "1963-10-22T05:12:11Z", "ms": -195504469400.3994 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 04:02 on Mon 21 Oct to 06:40 on Tue 22 Oct.", "fact": "1963-10-20T20:02:21Z → 1963-10-21T22:40:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:24–13:12 on the 21st, 12:24–13:12 on the 22nd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 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. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 20634 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Monday 21 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": "1963-10-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-21", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Monday 21 October. Caturthī runs from 04:02 on Mon 21 Oct to 06:40 on Tue 22 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-10-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-10-29", "festival": "ekadashi", "name": "Śukla Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13280, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-10-28T12:42:37+08:00", "utc": "1963-10-28T04:42:37Z", "ms": -194987842929.64743 }, "end": { "local": "1963-10-29T10:56:56+08:00", "utc": "1963-10-29T02:56:56Z", "ms": -194907783854.7249 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": true, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-28T12:42:37+08:00", "utc": "1963-10-28T04:42:37Z", "ms": -194987842929.64743 }, "end": { "local": "1963-10-29T10:56:56+08:00", "utc": "1963-10-29T02:56:56Z", "ms": -194907783854.7249 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-10-28", "window": { "start": { "local": "1963-10-28T07:14:51+08:00", "utc": "1963-10-27T23:14:51Z", "ms": -195007508919.0194 }, "end": { "local": "1963-10-28T07:14:51+08:00", "utc": "1963-10-27T23:14:51Z", "ms": -195007508919.0194 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-10-29", "window": { "start": { "local": "1963-10-29T07:15:36+08:00", "utc": "1963-10-28T23:15:36Z", "ms": -194921063520.54953 }, "end": { "local": "1963-10-29T07:15:36+08:00", "utc": "1963-10-28T23:15:36Z", "ms": -194921063520.54953 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 12:43 on Mon 28 Oct to 10:57 on Tue 29 Oct.", "fact": "1963-10-28T04:42:37Z → 1963-10-29T02:56:56Z" }, { "step": "kaala", "text": "Sunrise is at 07:15 on the 28th and 07:16 on the 29th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 28th and is on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 13280 s" }, { "step": "ruling", "text": "Śukla Ekādaśī, Chengdu, 1963: Tuesday 29 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": "1963-10-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-29", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Ekādaśī 1963 falls on Tuesday 29 October. Ekādaśī runs from 12:43 on Mon 28 Oct to 10:57 on Tue 29 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-10-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-10-30", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-10-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33377, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-10-30T08:26:00+08:00", "utc": "1963-10-30T00:26:00Z", "ms": -194830440251.80466 }, "end": { "local": "1963-10-31T05:18:21+08:00", "utc": "1963-10-30T21:18:21Z", "ms": -194755298878.36487 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": true, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-10-30T08:26:00+08:00", "utc": "1963-10-30T00:26:00Z", "ms": -194830440251.80466 }, "end": { "local": "1963-10-31T05:18:21+08:00", "utc": "1963-10-30T21:18:21Z", "ms": -194755298878.36487 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-10-29", "window": { "start": { "local": "1963-10-29T18:19:07+08:00", "utc": "1963-10-29T10:19:07Z", "ms": -194881252954.93448 }, "end": { "local": "1963-10-29T20:02:45+08:00", "utc": "1963-10-29T12:02:45Z", "ms": -194875034927.34674 } }, "covered_min": 0, "window_min": 104, "qualifies": false }, { "local_date": "1963-10-30", "window": { "start": { "local": "1963-10-30T18:18:13+08:00", "utc": "1963-10-30T10:18:13Z", "ms": -194794906923.9302 }, "end": { "local": "1963-10-30T20:02:04+08:00", "utc": "1963-10-30T12:02:04Z", "ms": -194788675547.79608 } }, "covered_min": 104, "window_min": 104, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 08:26 on Wed 30 Oct to 05:18 on Thu 31 Oct.", "fact": "1963-10-30T00:26:00Z → 1963-10-30T21:18:21Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:19–20:03 on the 29th, 18:18–20:02 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 0 of 104 minutes on the 29th and 104 of 104 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 33377 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Wednesday 30 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": "1963-10-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-10-30", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Wednesday 30 October. Trayodaśī runs from 08:26 on Wed 30 Oct to 05:18 on Thu 31 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-10-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-11-04", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35974, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-11-04T10:50:49+08:00", "utc": "1963-11-04T02:50:49Z", "ms": -194389751140.67477 }, "end": { "local": "1963-11-05T07:52:03+08:00", "utc": "1963-11-04T23:52:03Z", "ms": -194314077188.70822 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": true, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-04T10:50:49+08:00", "utc": "1963-11-04T02:50:49Z", "ms": -194389751140.67477 }, "end": { "local": "1963-11-05T07:52:03+08:00", "utc": "1963-11-04T23:52:03Z", "ms": -194314077188.70822 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-11-04", "window": { "start": { "local": "1963-11-04T20:50:23+08:00", "utc": "1963-11-04T12:50:23Z", "ms": -194353776987.31372 }, "end": { "local": "1963-11-04T20:50:23+08:00", "utc": "1963-11-04T12:50:23Z", "ms": -194353776987.31372 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-11-05", "window": { "start": { "local": "1963-11-05T21:47:53+08:00", "utc": "1963-11-05T13:47:53Z", "ms": -194263926866.38385 }, "end": { "local": "1963-11-05T21:47:53+08:00", "utc": "1963-11-05T13:47:53Z", "ms": -194263926866.38385 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:51 on Mon 4 Nov to 07:52 on Tue 5 Nov.", "fact": "1963-11-04T02:50:49Z → 1963-11-04T23:52:03Z" }, { "step": "kaala", "text": "Moonrise is at 20:50 on the 4th and 21:48 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 35974 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Monday 4 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": "1963-11-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-04", "confidence": "determinate" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Monday 4 November. Caturthī runs from 10:51 on Mon 4 Nov to 07:52 on Tue 5 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-11-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-11-11", "festival": "ekadashi", "name": "Kṛṣṇa Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6482, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-11-11T04:05:30+08:00", "utc": "1963-11-10T20:05:30Z", "ms": -193809270005.39117 }, "end": { "local": "1963-11-12T05:38:48+08:00", "utc": "1963-11-11T21:38:48Z", "ms": -193717272090.21857 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": true, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-11T04:05:30+08:00", "utc": "1963-11-10T20:05:30Z", "ms": -193809270005.39117 }, "end": { "local": "1963-11-12T05:38:48+08:00", "utc": "1963-11-11T21:38:48Z", "ms": -193717272090.21857 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-11-11", "window": { "start": { "local": "1963-11-11T07:26:00+08:00", "utc": "1963-11-10T23:26:00Z", "ms": -193797240480.84372 }, "end": { "local": "1963-11-11T07:26:00+08:00", "utc": "1963-11-10T23:26:00Z", "ms": -193797240480.84372 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-11-12", "window": { "start": { "local": "1963-11-12T07:26:50+08:00", "utc": "1963-11-11T23:26:50Z", "ms": -193710790338.3724 }, "end": { "local": "1963-11-12T07:26:50+08:00", "utc": "1963-11-11T23:26:50Z", "ms": -193710790338.3724 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 04:05 on Mon 11 Nov to 05:39 on Tue 12 Nov.", "fact": "1963-11-10T20:05:30Z → 1963-11-11T21:38:48Z" }, { "step": "kaala", "text": "Sunrise is at 07:26 on the 11th and 07:27 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 6482 s" }, { "step": "ruling", "text": "Kṛṣṇa Ekādaśī, Chengdu, 1963: Monday 11 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": "1963-11-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-11", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Ekādaśī 1963 falls on Monday 11 November. Ekādaśī runs from 04:05 on Mon 11 Nov to 05:39 on Tue 12 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-11-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-11-13", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29852, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-11-13T07:35:33+08:00", "utc": "1963-11-12T23:35:33Z", "ms": -193623866714.41037 }, "end": { "local": "1963-11-14T09:49:46+08:00", "utc": "1963-11-14T01:49:46Z", "ms": -193529414129.91748 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": true, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-13T07:35:33+08:00", "utc": "1963-11-12T23:35:33Z", "ms": -193623866714.41037 }, "end": { "local": "1963-11-14T09:49:46+08:00", "utc": "1963-11-14T01:49:46Z", "ms": -193529414129.91748 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-11-13", "window": { "start": { "local": "1963-11-13T18:07:52+08:00", "utc": "1963-11-13T10:07:52Z", "ms": -193585927996.2247 }, "end": { "local": "1963-11-13T19:54:37+08:00", "utc": "1963-11-13T11:54:37Z", "ms": -193579522848.99478 } }, "covered_min": 107, "window_min": 107, "qualifies": true }, { "local_date": "1963-11-14", "window": { "start": { "local": "1963-11-14T18:07:18+08:00", "utc": "1963-11-14T10:07:18Z", "ms": -193499561679.62964 }, "end": { "local": "1963-11-14T19:54:15+08:00", "utc": "1963-11-14T11:54:15Z", "ms": -193493145274.397 } }, "covered_min": 0, "window_min": 107, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 07:36 on Wed 13 Nov to 09:50 on Thu 14 Nov.", "fact": "1963-11-12T23:35:33Z → 1963-11-14T01:49:46Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:08–19:55 on the 13th, 18:07–19:54 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 107 of 107 minutes on the 13th and 0 of 107 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 29852 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Wednesday 13 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": "1963-11-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-13", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Wednesday 13 November. Trayodaśī runs from 07:36 on Wed 13 Nov to 09:50 on Thu 14 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-11-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-11-14", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31055, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-11-14T09:49:46+08:00", "utc": "1963-11-14T01:49:46Z", "ms": -193529414129.91748 }, "end": { "local": "1963-11-15T12:16:13+08:00", "utc": "1963-11-15T04:16:13Z", "ms": -193434227300.47568 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": true, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-14T09:49:46+08:00", "utc": "1963-11-14T01:49:46Z", "ms": -193529414129.91748 }, "end": { "local": "1963-11-15T12:16:13+08:00", "utc": "1963-11-15T04:16:13Z", "ms": -193434227300.47568 } }, "kaala": "nishita", "days": [ { "local_date": "1963-11-13", "window": { "start": { "local": "1963-11-14T00:24:11+08:00", "utc": "1963-11-13T16:24:11Z", "ms": -193563348694.1125 }, "end": { "local": "1963-11-14T01:12:11+08:00", "utc": "1963-11-13T17:12:11Z", "ms": -193560468694.1125 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-11-14", "window": { "start": { "local": "1963-11-15T00:24:20+08:00", "utc": "1963-11-14T16:24:20Z", "ms": -193476940160.0073 }, "end": { "local": "1963-11-15T01:12:20+08:00", "utc": "1963-11-14T17:12:20Z", "ms": -193474060160.0073 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 09:50 on Thu 14 Nov to 12:16 on Fri 15 Nov.", "fact": "1963-11-14T01:49:46Z → 1963-11-15T04:16:13Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:24–01:12 on the 13th, 00:24–01:12 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 0 of 48 minutes on the 13th and 48 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 31055 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Thursday 14 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-14", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Thursday 14 November. Caturdaśī runs from 09:50 on Thu 14 Nov to 12:16 on Fri 15 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-11-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/bali-puja", "festival": "bali-puja", "name": "Bali Pūjā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2305, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1963-11-16T14:50:16+08:00", "utc": "1963-11-16T06:50:16Z", "ms": -193338583501.42178 }, "end": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-16T14:50:16+08:00", "utc": "1963-11-16T06:50:16Z", "ms": -193338583501.42178 }, "end": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-11-16", "window": { "start": { "local": "1963-11-16T18:06:16+08:00", "utc": "1963-11-16T10:06:16Z", "ms": -193326824399.23914 }, "end": { "local": "1963-11-16T19:53:34+08:00", "utc": "1963-11-16T11:53:34Z", "ms": -193320386042.3851 } }, "covered_min": 107, "window_min": 107, "qualifies": true }, { "local_date": "1963-11-17", "window": { "start": { "local": "1963-11-17T18:05:47+08:00", "utc": "1963-11-17T10:05:47Z", "ms": -193240453400.23303 }, "end": { "local": "1963-11-17T19:53:16+08:00", "utc": "1963-11-17T11:53:16Z", "ms": -193234004362.647 } }, "covered_min": 0, "window_min": 107, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 14:50 on Sat 16 Nov to 17:27 on Sun 17 Nov.", "fact": "1963-11-16T06:50:16Z → 1963-11-17T09:27:22Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:06–19:54 on the 16th, 18:06–19:53 on the 17th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pradoṣa. It covers 107 of 107 minutes on the 16th and 0 of 107 on the 17th.", "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 2305 s" }, { "step": "ruling", "text": "Bali Pūjā, Chengdu, 1963: Saturday 16 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": "1963-11-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-16", "confidence": "determinate" } ], "quote": "In Chengdu, Bali Pūjā 1963 falls on Saturday 16 November. Pratipadā runs from 14:50 on Sat 16 Nov to 17:27 on Sun 17 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/govardhana-puja", "festival": "govardhana-puja", "name": "Govardhana Pūjā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5883, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1963-11-16T14:50:16+08:00", "utc": "1963-11-16T06:50:16Z", "ms": -193338583501.42178 }, "end": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-16T14:50:16+08:00", "utc": "1963-11-16T06:50:16Z", "ms": -193338583501.42178 }, "end": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-16", "window": { "start": { "local": "1963-11-16T12:24:14+08:00", "utc": "1963-11-16T04:24:14Z", "ms": -193347346069.94806 }, "end": { "local": "1963-11-16T13:12:14+08:00", "utc": "1963-11-16T05:12:14Z", "ms": -193344466069.94806 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-11-17", "window": { "start": { "local": "1963-11-17T12:24:25+08:00", "utc": "1963-11-17T04:24:25Z", "ms": -193260935061.53345 }, "end": { "local": "1963-11-17T13:12:25+08:00", "utc": "1963-11-17T05:12:25Z", "ms": -193258055061.53345 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 14:50 on Sat 16 Nov to 17:27 on Sun 17 Nov.", "fact": "1963-11-16T06:50:16Z → 1963-11-17T09:27:22Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:24–13:12 on the 16th, 12:24–13:12 on the 17th.", "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 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: purvaviddha → only-day · margin 5883 s" }, { "step": "ruling", "text": "Govardhana Pūjā, Chengdu, 1963: Sunday 17 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": "1963-11-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-17", "confidence": "determinate" } ], "quote": "In Chengdu, Govardhana Pūjā 1963 falls on Sunday 17 November. Pratipadā runs from 14:50 on Sat 16 Nov to 17:27 on Sun 17 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/dyuta-pratipad", "festival": "dyuta-pratipad", "name": "Dyūta Pratipad", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13683, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1963-11-16T14:50:16+08:00", "utc": "1963-11-16T06:50:16Z", "ms": -193338583501.42178 }, "end": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-16T14:50:16+08:00", "utc": "1963-11-16T06:50:16Z", "ms": -193338583501.42178 }, "end": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 } }, "kaala": "purvahna", "days": [ { "local_date": "1963-11-16", "window": { "start": { "local": "1963-11-16T07:30:12+08:00", "utc": "1963-11-15T23:30:12Z", "ms": -193364987740.65695 }, "end": { "local": "1963-11-16T11:02:13+08:00", "utc": "1963-11-16T03:02:13Z", "ms": -193352266626.851 } }, "covered_min": 0, "window_min": 212, "qualifies": false }, { "local_date": "1963-11-17", "window": { "start": { "local": "1963-11-17T07:31:03+08:00", "utc": "1963-11-16T23:31:03Z", "ms": -193278536722.83386 }, "end": { "local": "1963-11-17T11:02:38+08:00", "utc": "1963-11-17T03:02:38Z", "ms": -193265842281.96692 } }, "covered_min": 212, "window_min": 212, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 14:50 on Sat 16 Nov to 17:27 on Sun 17 Nov.", "fact": "1963-11-16T06:50:16Z → 1963-11-17T09:27:22Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 07:30–11:02 on the 16th, 07:31–11:03 on the 17th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pūrvāhṇa. It covers 0 of 212 minutes on the 16th and 212 of 212 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 13683 s" }, { "step": "ruling", "text": "Dyūta Pratipad, Chengdu, 1963: Sunday 17 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": "1963-11-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-17", "confidence": "determinate" } ], "quote": "In Chengdu, Dyūta Pratipad 1963 falls on Sunday 17 November. Pratipadā runs from 14:50 on Sat 16 Nov to 17:27 on Sun 17 Nov and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/yama-dvitiya", "festival": "yama-dvitiya", "name": "Yama Dvitīyā", "everyday": "Bhai Dooj", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15297, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 }, "end": { "local": "1963-11-18T20:02:12+08:00", "utc": "1963-11-18T12:02:12Z", "ms": -193147068039.98953 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-17T17:27:22+08:00", "utc": "1963-11-17T09:27:22Z", "ms": -193242758314.67792 }, "end": { "local": "1963-11-18T20:02:12+08:00", "utc": "1963-11-18T12:02:12Z", "ms": -193147068039.98953 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-17", "window": { "start": { "local": "1963-11-17T12:24:25+08:00", "utc": "1963-11-17T04:24:25Z", "ms": -193260935061.53345 }, "end": { "local": "1963-11-17T13:12:25+08:00", "utc": "1963-11-17T05:12:25Z", "ms": -193258055061.53345 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-11-18", "window": { "start": { "local": "1963-11-18T12:24:37+08:00", "utc": "1963-11-18T04:24:37Z", "ms": -193174523212.5199 }, "end": { "local": "1963-11-18T13:12:37+08:00", "utc": "1963-11-18T05:12:37Z", "ms": -193171643212.5199 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 17:27 on Sun 17 Nov to 20:02 on Mon 18 Nov.", "fact": "1963-11-17T09:27:22Z → 1963-11-18T12:02:12Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:24–13:12 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": "Dvitīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 17th and 48 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 15297 s" }, { "step": "ruling", "text": "Yama Dvitīyā, Chengdu, 1963: Monday 18 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": "1963-11-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-18", "confidence": "determinate" } ], "quote": "In Chengdu, Yama Dvitīyā (Bhai Dooj) 1963 falls on Monday 18 November. Dvitīyā runs from 17:27 on Sun 17 Nov to 20:02 on Mon 18 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/naga-chaturthi", "festival": "naga-chaturthi", "name": "Nāga Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33327, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-11-19T22:28:17+08:00", "utc": "1963-11-19T14:28:17Z", "ms": -193051903452.85626 }, "end": { "local": "1963-11-21T00:37:41+08:00", "utc": "1963-11-20T16:37:41Z", "ms": -192957738628.44748 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-19T22:28:17+08:00", "utc": "1963-11-19T14:28:17Z", "ms": -193051903452.85626 }, "end": { "local": "1963-11-21T00:37:41+08:00", "utc": "1963-11-20T16:37:41Z", "ms": -192957738628.44748 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-19", "window": { "start": { "local": "1963-11-19T12:24:49+08:00", "utc": "1963-11-19T04:24:49Z", "ms": -193088110531.56824 }, "end": { "local": "1963-11-19T13:12:49+08:00", "utc": "1963-11-19T05:12:49Z", "ms": -193085230531.56824 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-11-20", "window": { "start": { "local": "1963-11-20T12:25:03+08:00", "utc": "1963-11-20T04:25:03Z", "ms": -193001697028.35724 }, "end": { "local": "1963-11-20T13:13:03+08:00", "utc": "1963-11-20T05:13:03Z", "ms": -192998817028.35724 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:28 on Tue 19 Nov to 00:38 on Thu 21 Nov.", "fact": "1963-11-19T14:28:17Z → 1963-11-20T16:37:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 19th, 12:25–13:13 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 19th and 48 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33327 s" }, { "step": "ruling", "text": "Nāga Caturthī, Chengdu, 1963: Wednesday 20 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": "1963-11-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-20", "confidence": "determinate" } ], "quote": "In Chengdu, Nāga Caturthī 1963 falls on Wednesday 20 November. Caturthī runs from 22:28 on Tue 19 Nov to 00:38 on Thu 21 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-11-20", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33327, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-11-19T22:28:17+08:00", "utc": "1963-11-19T14:28:17Z", "ms": -193051903452.85626 }, "end": { "local": "1963-11-21T00:37:41+08:00", "utc": "1963-11-20T16:37:41Z", "ms": -192957738628.44748 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-19T22:28:17+08:00", "utc": "1963-11-19T14:28:17Z", "ms": -193051903452.85626 }, "end": { "local": "1963-11-21T00:37:41+08:00", "utc": "1963-11-20T16:37:41Z", "ms": -192957738628.44748 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-19", "window": { "start": { "local": "1963-11-19T12:24:49+08:00", "utc": "1963-11-19T04:24:49Z", "ms": -193088110531.56824 }, "end": { "local": "1963-11-19T13:12:49+08:00", "utc": "1963-11-19T05:12:49Z", "ms": -193085230531.56824 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-11-20", "window": { "start": { "local": "1963-11-20T12:25:03+08:00", "utc": "1963-11-20T04:25:03Z", "ms": -193001697028.35724 }, "end": { "local": "1963-11-20T13:13:03+08:00", "utc": "1963-11-20T05:13:03Z", "ms": -192998817028.35724 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 22:28 on Tue 19 Nov to 00:38 on Thu 21 Nov.", "fact": "1963-11-19T14:28:17Z → 1963-11-20T16:37:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:25–13:13 on the 19th, 12:25–13:13 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 19th and 48 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33327 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Wednesday 20 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": "1963-11-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-20", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Wednesday 20 November. Caturthī runs from 22:28 on Tue 19 Nov to 00:38 on Thu 21 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-11-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/surya-shashthi", "festival": "surya-shashthi", "name": "Sūrya Ṣaṣṭhī", "everyday": "Chhath", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32077, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1963-11-22T02:21:35+08:00", "utc": "1963-11-21T18:21:35Z", "ms": -192865104505.36682 }, "end": { "local": "1963-11-23T03:31:11+08:00", "utc": "1963-11-22T19:31:11Z", "ms": -192774528578.8453 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-22T02:21:35+08:00", "utc": "1963-11-21T18:21:35Z", "ms": -192865104505.36682 }, "end": { "local": "1963-11-23T03:31:11+08:00", "utc": "1963-11-22T19:31:11Z", "ms": -192774528578.8453 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-22", "window": { "start": { "local": "1963-11-22T12:25:32+08:00", "utc": "1963-11-22T04:25:32Z", "ms": -192828867598.49902 }, "end": { "local": "1963-11-22T13:13:32+08:00", "utc": "1963-11-22T05:13:32Z", "ms": -192825987598.49902 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-11-23", "window": { "start": { "local": "1963-11-23T12:25:48+08:00", "utc": "1963-11-23T04:25:48Z", "ms": -192742451695.57764 }, "end": { "local": "1963-11-23T13:13:48+08:00", "utc": "1963-11-23T05:13:48Z", "ms": -192739571695.57764 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 02:22 on Fri 22 Nov to 03:31 on Sat 23 Nov.", "fact": "1963-11-21T18:21:35Z → 1963-11-22T19:31:11Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:26–13:14 on the 22nd, 12:26–13:14 on the 23rd.", "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 22nd and 0 of 48 on the 23rd.", "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 32077 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī, Chengdu, 1963: Friday 22 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "surya-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Nadi sasthi, Skanda sasthi (Madras), Surya sasthi, Chhat (Bihar)." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-11-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-22", "confidence": "determinate" } ], "quote": "In Chengdu, Sūrya Ṣaṣṭhī (Chhath) 1963 falls on Friday 22 November. Ṣaṣṭhī runs from 02:22 on Fri 22 Nov to 03:31 on Sat 23 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/gopashtami", "festival": "gopashtami", "name": "Gopāṣṭamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30421, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1963-11-24T03:59:04+08:00", "utc": "1963-11-23T19:59:04Z", "ms": -192686456199.7132 }, "end": { "local": "1963-11-25T03:40:22+08:00", "utc": "1963-11-24T19:40:22Z", "ms": -192601177793.2899 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-24T03:59:04+08:00", "utc": "1963-11-23T19:59:04Z", "ms": -192686456199.7132 }, "end": { "local": "1963-11-25T03:40:22+08:00", "utc": "1963-11-24T19:40:22Z", "ms": -192601177793.2899 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-24", "window": { "start": { "local": "1963-11-24T12:26:05+08:00", "utc": "1963-11-24T04:26:05Z", "ms": -192656035017.6292 }, "end": { "local": "1963-11-24T13:14:05+08:00", "utc": "1963-11-24T05:14:05Z", "ms": -192653155017.6292 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-11-25", "window": { "start": { "local": "1963-11-25T12:26:22+08:00", "utc": "1963-11-25T04:26:22Z", "ms": -192569617578.02054 }, "end": { "local": "1963-11-25T13:14:22+08:00", "utc": "1963-11-25T05:14:22Z", "ms": -192566737578.02054 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 03:59 on Sun 24 Nov to 03:40 on Mon 25 Nov.", "fact": "1963-11-23T19:59:04Z → 1963-11-24T19:40:22Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:26–13:14 on the 24th, 12:26–13:14 on the 25th.", "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 24th and 0 of 48 on the 25th.", "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 30421 s" }, { "step": "ruling", "text": "Gopāṣṭamī, Chengdu, 1963: Sunday 24 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "gopashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 8 Gopastami, Gosthastami." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1963-11-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-24", "confidence": "determinate" } ], "quote": "In Chengdu, Gopāṣṭamī 1963 falls on Sunday 24 November. Aṣṭamī runs from 03:59 on Sun 24 Nov to 03:40 on Mon 25 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/akshaya-navami", "festival": "akshaya-navami", "name": "Akṣaya Navamī", "everyday": "Amla Navami", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14249, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1963-11-25T03:40:22+08:00", "utc": "1963-11-24T19:40:22Z", "ms": -192601177793.2899 }, "end": { "local": "1963-11-26T02:33:36+08:00", "utc": "1963-11-25T18:33:36Z", "ms": -192518783622.74323 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-25T03:40:22+08:00", "utc": "1963-11-24T19:40:22Z", "ms": -192601177793.2899 }, "end": { "local": "1963-11-26T02:33:36+08:00", "utc": "1963-11-25T18:33:36Z", "ms": -192518783622.74323 } }, "kaala": "purvahna", "days": [ { "local_date": "1963-11-25", "window": { "start": { "local": "1963-11-25T07:37:52+08:00", "utc": "1963-11-24T23:37:52Z", "ms": -192586928345.27637 }, "end": { "local": "1963-11-25T11:06:12+08:00", "utc": "1963-11-25T03:06:12Z", "ms": -192574427833.7725 } }, "covered_min": 208, "window_min": 208, "qualifies": true }, { "local_date": "1963-11-26", "window": { "start": { "local": "1963-11-26T07:38:42+08:00", "utc": "1963-11-25T23:38:42Z", "ms": -192500477809.3718 }, "end": { "local": "1963-11-26T11:06:41+08:00", "utc": "1963-11-26T03:06:41Z", "ms": -192487998863.3914 } }, "covered_min": 0, "window_min": 208, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 03:40 on Mon 25 Nov to 02:34 on Tue 26 Nov.", "fact": "1963-11-24T19:40:22Z → 1963-11-25T18:33:36Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 07:38–11:06 on the 25th, 07:39–11:07 on the 26th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during pūrvāhṇa. It covers 208 of 208 minutes on the 25th and 0 of 208 on the 26th.", "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 14249 s" }, { "step": "ruling", "text": "Akṣaya Navamī, Chengdu, 1963: Monday 25 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": "1963-11-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-25", "confidence": "determinate" } ], "quote": "In Chengdu, Akṣaya Navamī (Amla Navami) 1963 falls on Monday 25 November. Navamī runs from 03:40 on Mon 25 Nov to 02:34 on Tue 26 Nov and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/durga-navami", "festival": "durga-navami", "name": "Durgā Navamī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31560, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1963-11-25T03:40:22+08:00", "utc": "1963-11-24T19:40:22Z", "ms": -192601177793.2899 }, "end": { "local": "1963-11-26T02:33:36+08:00", "utc": "1963-11-25T18:33:36Z", "ms": -192518783622.74323 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-25T03:40:22+08:00", "utc": "1963-11-24T19:40:22Z", "ms": -192601177793.2899 }, "end": { "local": "1963-11-26T02:33:36+08:00", "utc": "1963-11-25T18:33:36Z", "ms": -192518783622.74323 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-25", "window": { "start": { "local": "1963-11-25T12:26:22+08:00", "utc": "1963-11-25T04:26:22Z", "ms": -192569617578.02054 }, "end": { "local": "1963-11-25T13:14:22+08:00", "utc": "1963-11-25T05:14:22Z", "ms": -192566737578.02054 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-11-26", "window": { "start": { "local": "1963-11-26T12:26:41+08:00", "utc": "1963-11-26T04:26:41Z", "ms": -192483199390.40118 }, "end": { "local": "1963-11-26T13:14:41+08:00", "utc": "1963-11-26T05:14:41Z", "ms": -192480319390.40118 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 03:40 on Mon 25 Nov to 02:34 on Tue 26 Nov.", "fact": "1963-11-24T19:40:22Z → 1963-11-25T18:33:36Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:26–13:14 on the 25th, 12:27–13:15 on the 26th.", "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 25th and 0 of 48 on the 26th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 31560 s" }, { "step": "ruling", "text": "Durgā Navamī, Chengdu, 1963: Monday 25 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": "1963-11-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-25", "confidence": "determinate" } ], "quote": "In Chengdu, Durgā Navamī 1963 falls on Monday 25 November. Navamī runs from 03:40 on Mon 25 Nov to 02:34 on Tue 26 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/ekadashi?on=1963-11-27", "festival": "ekadashi", "name": "Prabodhinī Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25127, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-11-27T00:40:45+08:00", "utc": "1963-11-26T16:40:45Z", "ms": -192439154992.66742 }, "end": { "local": "1963-11-27T22:06:54+08:00", "utc": "1963-11-27T14:06:54Z", "ms": -192361986484.3214 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-27T00:40:45+08:00", "utc": "1963-11-26T16:40:45Z", "ms": -192439154992.66742 }, "end": { "local": "1963-11-27T22:06:54+08:00", "utc": "1963-11-27T14:06:54Z", "ms": -192361986484.3214 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-11-27", "window": { "start": { "local": "1963-11-27T07:39:32+08:00", "utc": "1963-11-26T23:39:32Z", "ms": -192414027511.4155 }, "end": { "local": "1963-11-27T07:39:32+08:00", "utc": "1963-11-26T23:39:32Z", "ms": -192414027511.4155 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-11-28", "window": { "start": { "local": "1963-11-28T07:40:23+08:00", "utc": "1963-11-27T23:40:23Z", "ms": -192327577488.00275 }, "end": { "local": "1963-11-28T07:40:23+08:00", "utc": "1963-11-27T23:40:23Z", "ms": -192327577488.00275 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 00:41 on Wed 27 Nov to 22:07 on Wed 27 Nov.", "fact": "1963-11-26T16:40:45Z → 1963-11-27T14:06:54Z" }, { "step": "kaala", "text": "Sunrise is at 07:40 on the 27th and 07:40 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 25127 s" }, { "step": "ruling", "text": "Prabodhinī Ekādaśī, Chengdu, 1963: Wednesday 27 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": "1963-11-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-27", "confidence": "determinate" } ], "quote": "In Chengdu, Prabodhinī Ekādaśī 1963 falls on Wednesday 27 November. Ekādaśī runs from 00:41 on Wed 27 Nov to 22:07 on Wed 27 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-11-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-11-28", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 3113, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-11-28T18:59:34+08:00", "utc": "1963-11-28T10:59:34Z", "ms": -192286825815.94632 }, "end": { "local": "1963-11-29T15:28:02+08:00", "utc": "1963-11-29T07:28:02Z", "ms": -192213117970.1446 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-28T18:59:34+08:00", "utc": "1963-11-28T10:59:34Z", "ms": -192286825815.94632 }, "end": { "local": "1963-11-29T15:28:02+08:00", "utc": "1963-11-29T07:28:02Z", "ms": -192213117970.1446 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-11-28", "window": { "start": { "local": "1963-11-28T18:02:16+08:00", "utc": "1963-11-28T10:02:16Z", "ms": -192290264163.76373 }, "end": { "local": "1963-11-28T19:51:27+08:00", "utc": "1963-11-28T11:51:27Z", "ms": -192283712645.22812 } }, "covered_min": 52, "window_min": 109, "qualifies": true }, { "local_date": "1963-11-29", "window": { "start": { "local": "1963-11-29T18:02:07+08:00", "utc": "1963-11-29T10:02:07Z", "ms": -192203873177.27606 }, "end": { "local": "1963-11-29T19:51:26+08:00", "utc": "1963-11-29T11:51:26Z", "ms": -192197313874.48846 } }, "covered_min": 0, "window_min": 109, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:00 on Thu 28 Nov to 15:28 on Fri 29 Nov.", "fact": "1963-11-28T10:59:34Z → 1963-11-29T07:28:02Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:02–19:51 on the 28th, 18:02–19:51 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 52 of 109 minutes on the 28th and 0 of 109 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 3113 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Thursday 28 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": "1963-11-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-28", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Thursday 28 November. Trayodaśī runs from 19:00 on Thu 28 Nov to 15:28 on Fri 29 Nov and covers 52 of 109 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-11-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/kartiki-purnima", "festival": "kartiki-purnima", "name": "Kārtikī Pūrṇimā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2726, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-11-30T11:42:35+08:00", "utc": "1963-11-30T03:42:35Z", "ms": -192140245065.6169 }, "end": { "local": "1963-12-01T07:54:01+08:00", "utc": "1963-11-30T23:54:01Z", "ms": -192067559045.40952 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-30T11:42:35+08:00", "utc": "1963-11-30T03:42:35Z", "ms": -192140245065.6169 }, "end": { "local": "1963-12-01T07:54:01+08:00", "utc": "1963-11-30T23:54:01Z", "ms": -192067559045.40952 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-11-30", "window": { "start": { "local": "1963-11-30T12:28:01+08:00", "utc": "1963-11-30T04:28:01Z", "ms": -192137519432.22375 }, "end": { "local": "1963-11-30T13:16:01+08:00", "utc": "1963-11-30T05:16:01Z", "ms": -192134639432.22375 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1963-12-01", "window": { "start": { "local": "1963-12-01T12:28:22+08:00", "utc": "1963-12-01T04:28:22Z", "ms": -192051097708.12302 }, "end": { "local": "1963-12-01T13:16:22+08:00", "utc": "1963-12-01T05:16:22Z", "ms": -192048217708.12302 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 11:43 on Sat 30 Nov to 07:54 on Sun 1 Dec.", "fact": "1963-11-30T03:42:35Z → 1963-11-30T23:54:01Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:28–13:16 on the 30th, 12:28–13:16 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 30th and 0 of 48 on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 2726 s" }, { "step": "ruling", "text": "Kārtikī Pūrṇimā, Chengdu, 1963: Saturday 30 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": "1963-11-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-30", "confidence": "determinate" } ], "quote": "In Chengdu, Kārtikī Pūrṇimā 1963 falls on Saturday 30 November. Pūrṇimā runs from 11:43 on Sat 30 Nov to 07:54 on Sun 1 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/rasayatra", "festival": "rasayatra", "name": "Rāsayātrā", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-11-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23856, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1963-11-30T11:42:35+08:00", "utc": "1963-11-30T03:42:35Z", "ms": -192140245065.6169 }, "end": { "local": "1963-12-01T07:54:01+08:00", "utc": "1963-11-30T23:54:01Z", "ms": -192067559045.40952 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1963-11-30T11:42:35+08:00", "utc": "1963-11-30T03:42:35Z", "ms": -192140245065.6169 }, "end": { "local": "1963-12-01T07:54:01+08:00", "utc": "1963-11-30T23:54:01Z", "ms": -192067559045.40952 } }, "kaala": "nishita", "days": [ { "local_date": "1963-11-29", "window": { "start": { "local": "1963-11-30T00:28:04+08:00", "utc": "1963-11-29T16:28:04Z", "ms": -192180715791.82257 }, "end": { "local": "1963-11-30T01:16:04+08:00", "utc": "1963-11-29T17:16:04Z", "ms": -192177835791.82257 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-11-30", "window": { "start": { "local": "1963-12-01T00:28:25+08:00", "utc": "1963-11-30T16:28:25Z", "ms": -192094294937.62347 }, "end": { "local": "1963-12-01T01:16:25+08:00", "utc": "1963-11-30T17:16:25Z", "ms": -192091414937.62347 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 11:43 on Sat 30 Nov to 07:54 on Sun 1 Dec.", "fact": "1963-11-30T03:42:35Z → 1963-11-30T23:54:01Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:28–01:16 on the 29th, 00:28–01:16 on the 30th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during niśītha. It covers 0 of 48 minutes on the 29th and 48 of 48 on the 30th.", "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 23856 s" }, { "step": "ruling", "text": "Rāsayātrā, Chengdu, 1963: Saturday 30 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": "1963-11-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-11-30", "confidence": "determinate" } ], "quote": "In Chengdu, Rāsayātrā 1963 falls on Saturday 30 November. Pūrṇimā runs from 11:43 on Sat 30 Nov to 07:54 on Sun 1 Dec and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/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": "/chengdu/festivals/1963/sankashta-chaturthi?on=1963-12-03", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-12-03", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 5130, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-12-03T21:56:05+08:00", "utc": "1963-12-03T13:56:05Z", "ms": -191844235061.8873 }, "end": { "local": "1963-12-04T19:38:02+08:00", "utc": "1963-12-04T11:38:02Z", "ms": -191766118239.66568 }, "month": { "amanta": 7, "purnimanta": 9, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-12-03T21:56:05+08:00", "utc": "1963-12-03T13:56:05Z", "ms": -191844235061.8873 }, "end": { "local": "1963-12-04T19:38:02+08:00", "utc": "1963-12-04T11:38:02Z", "ms": -191766118239.66568 } }, "kaala": "moonrise", "days": [ { "local_date": "1963-12-03", "window": { "start": { "local": "1963-12-03T20:30:35+08:00", "utc": "1963-12-03T12:30:35Z", "ms": -191849364724.8227 }, "end": { "local": "1963-12-03T20:30:35+08:00", "utc": "1963-12-03T12:30:35Z", "ms": -191849364724.8227 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-12-04", "window": { "start": { "local": "1963-12-04T21:34:22+08:00", "utc": "1963-12-04T13:34:22Z", "ms": -191759137877.61075 }, "end": { "local": "1963-12-04T21:34:22+08:00", "utc": "1963-12-04T13:34:22Z", "ms": -191759137877.61075 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:56 on Tue 3 Dec to 19:38 on Wed 4 Dec.", "fact": "1963-12-03T13:56:05Z → 1963-12-04T11:38:02Z" }, { "step": "kaala", "text": "Moonrise is at 20:31 on the 3rd and 21:34 on the 4th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 3rd and is not on the 4th.", "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 5130 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Chengdu, 1963: Tuesday 3 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": "1963-12-03", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-12-03", "confidence": "boundary" } ], "quote": "In Chengdu, Saṅkaṣṭa Caturthī 1963 falls on Tuesday 3 December. Caturthī runs from 21:56 on Tue 3 Dec to 19:38 on Wed 4 Dec, and is current at moonrise on neither day.", "cite": "https://ahargana.org/chengdu/festivals/1963/sankashta-chaturthi?on=1963-12-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-12-11", "festival": "ekadashi", "name": "Utpannā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-12-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28829, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-12-10T21:28:50+08:00", "utc": "1963-12-10T13:28:50Z", "ms": -191241070214.50616 }, "end": { "local": "1963-12-11T23:50:45+08:00", "utc": "1963-12-11T15:50:45Z", "ms": -191146155006.8897 }, "month": { "amanta": 7, "purnimanta": 9, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-12-10T21:28:50+08:00", "utc": "1963-12-10T13:28:50Z", "ms": -191241070214.50616 }, "end": { "local": "1963-12-11T23:50:45+08:00", "utc": "1963-12-11T15:50:45Z", "ms": -191146155006.8897 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-12-11", "window": { "start": { "local": "1963-12-11T07:50:31+08:00", "utc": "1963-12-10T23:50:31Z", "ms": -191203768717.5667 }, "end": { "local": "1963-12-11T07:50:31+08:00", "utc": "1963-12-10T23:50:31Z", "ms": -191203768717.5667 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1963-12-12", "window": { "start": { "local": "1963-12-12T07:51:14+08:00", "utc": "1963-12-11T23:51:14Z", "ms": -191117326499.1666 }, "end": { "local": "1963-12-12T07:51:14+08:00", "utc": "1963-12-11T23:51:14Z", "ms": -191117326499.1666 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 21:29 on Tue 10 Dec to 23:51 on Wed 11 Dec.", "fact": "1963-12-10T13:28:50Z → 1963-12-11T15:50:45Z" }, { "step": "kaala", "text": "Sunrise is at 07:51 on the 11th and 07:51 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 28829 s" }, { "step": "ruling", "text": "Utpannā Ekādaśī, Chengdu, 1963: Wednesday 11 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": "1963-12-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-12-11", "confidence": "determinate" } ], "quote": "In Chengdu, Utpannā Ekādaśī 1963 falls on Wednesday 11 December. Ekādaśī runs from 21:29 on Tue 10 Dec to 23:51 on Wed 11 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-12-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-12-13", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-12-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23538, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-12-13T02:25:39+08:00", "utc": "1963-12-12T18:25:39Z", "ms": -191050461257.7708 }, "end": { "local": "1963-12-14T05:04:38+08:00", "utc": "1963-12-13T21:04:38Z", "ms": -190954522015.69492 }, "month": { "amanta": 7, "purnimanta": 9, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-12-13T02:25:39+08:00", "utc": "1963-12-12T18:25:39Z", "ms": -191050461257.7708 }, "end": { "local": "1963-12-14T05:04:38+08:00", "utc": "1963-12-13T21:04:38Z", "ms": -190954522015.69492 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-12-12", "window": { "start": { "local": "1963-12-12T18:02:48+08:00", "utc": "1963-12-12T10:02:48Z", "ms": -191080631877.28595 }, "end": { "local": "1963-12-12T19:53:21+08:00", "utc": "1963-12-12T11:53:21Z", "ms": -191073998982.03098 } }, "covered_min": 0, "window_min": 111, "qualifies": false }, { "local_date": "1963-12-13", "window": { "start": { "local": "1963-12-13T18:03:03+08:00", "utc": "1963-12-13T10:03:03Z", "ms": -190994216687.33853 }, "end": { "local": "1963-12-13T19:53:40+08:00", "utc": "1963-12-13T11:53:40Z", "ms": -190987580429.64056 } }, "covered_min": 111, "window_min": 111, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:26 on Fri 13 Dec to 05:05 on Sat 14 Dec.", "fact": "1963-12-12T18:25:39Z → 1963-12-13T21:04:38Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:03–19:53 on the 12th, 18:03–19:54 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 111 minutes on the 12th and 111 of 111 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 23538 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Chengdu, 1963: Friday 13 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": "1963-12-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-12-13", "confidence": "determinate" } ], "quote": "In Chengdu, Kṛṣṇa Pradoṣa Vrata 1963 falls on Friday 13 December. Trayodaśī runs from 02:26 on Fri 13 Dec to 05:05 on Sat 14 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-12-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/shivaratri?on=1963-12-14", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-12-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13369, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1963-12-14T05:04:38+08:00", "utc": "1963-12-13T21:04:38Z", "ms": -190954522015.69492 }, "end": { "local": "1963-12-15T07:40:12+08:00", "utc": "1963-12-14T23:40:12Z", "ms": -190858787784.27866 }, "month": { "amanta": 7, "purnimanta": 9, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-12-14T05:04:38+08:00", "utc": "1963-12-13T21:04:38Z", "ms": -190954522015.69492 }, "end": { "local": "1963-12-15T07:40:12+08:00", "utc": "1963-12-14T23:40:12Z", "ms": -190858787784.27866 } }, "kaala": "nishita", "days": [ { "local_date": "1963-12-13", "window": { "start": { "local": "1963-12-14T00:33:49+08:00", "utc": "1963-12-13T16:33:49Z", "ms": -190970770720.9712 }, "end": { "local": "1963-12-14T01:21:49+08:00", "utc": "1963-12-13T17:21:49Z", "ms": -190967890720.9712 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-12-14", "window": { "start": { "local": "1963-12-15T00:34:17+08:00", "utc": "1963-12-14T16:34:17Z", "ms": -190884342587.257 }, "end": { "local": "1963-12-15T01:22:17+08:00", "utc": "1963-12-14T17:22:17Z", "ms": -190881462587.257 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 05:05 on Sat 14 Dec to 07:40 on Sun 15 Dec.", "fact": "1963-12-13T21:04:38Z → 1963-12-14T23:40:12Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:34–01:22 on the 13th, 00:34–01:22 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 0 of 48 minutes on the 13th and 48 of 48 on the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 13369 s" }, { "step": "ruling", "text": "Śivarātri, Chengdu, 1963: Saturday 14 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": "1963-12-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-12-14", "confidence": "determinate" } ], "quote": "In Chengdu, Śivarātri 1963 falls on Saturday 14 December. Caturdaśī runs from 05:05 on Sat 14 Dec to 07:40 on Sun 15 Dec and covers all of niśītha that night.", "cite": "https://ahargana.org/chengdu/festivals/1963/shivaratri?on=1963-12-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-12-20", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-12-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8102, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1963-12-19T15:39:27+08:00", "utc": "1963-12-19T07:39:27Z", "ms": -190484432739.67252 }, "end": { "local": "1963-12-20T16:41:21+08:00", "utc": "1963-12-20T08:41:21Z", "ms": -190394319236.78577 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-12-19T15:39:27+08:00", "utc": "1963-12-19T07:39:27Z", "ms": -190484432739.67252 }, "end": { "local": "1963-12-20T16:41:21+08:00", "utc": "1963-12-20T08:41:21Z", "ms": -190394319236.78577 } }, "kaala": "madhyahna", "days": [ { "local_date": "1963-12-19", "window": { "start": { "local": "1963-12-19T12:36:25+08:00", "utc": "1963-12-19T04:36:25Z", "ms": -190495415081.4755 }, "end": { "local": "1963-12-19T13:24:25+08:00", "utc": "1963-12-19T05:24:25Z", "ms": -190492535081.4755 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1963-12-20", "window": { "start": { "local": "1963-12-20T12:36:55+08:00", "utc": "1963-12-20T04:36:55Z", "ms": -190408985072.01468 }, "end": { "local": "1963-12-20T13:24:55+08:00", "utc": "1963-12-20T05:24:55Z", "ms": -190406105072.01468 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 15:39 on Thu 19 Dec to 16:41 on Fri 20 Dec.", "fact": "1963-12-19T07:39:27Z → 1963-12-20T08:41:21Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:36–13:24 on the 19th, 12:37–13:25 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 19th and 48 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8102 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Chengdu, 1963: Friday 20 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": "1963-12-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-12-20", "confidence": "determinate" } ], "quote": "In Chengdu, Vināyaka Caturthī 1963 falls on Friday 20 December. Caturthī runs from 15:39 on Thu 19 Dec to 16:41 on Fri 20 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/chengdu/festivals/1963/vinayaka-chaturthi?on=1963-12-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/ekadashi?on=1963-12-27", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-12-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 464, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1963-12-26T10:56:29+08:00", "utc": "1963-12-26T02:56:29Z", "ms": -189896610599.22772 }, "end": { "local": "1963-12-27T08:07:19+08:00", "utc": "1963-12-27T00:07:19Z", "ms": -189820360596.0721 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-12-26T10:56:29+08:00", "utc": "1963-12-26T02:56:29Z", "ms": -189896610599.22772 }, "end": { "local": "1963-12-27T08:07:19+08:00", "utc": "1963-12-27T00:07:19Z", "ms": -189820360596.0721 } }, "kaala": "sunrise", "days": [ { "local_date": "1963-12-26", "window": { "start": { "local": "1963-12-26T07:59:11+08:00", "utc": "1963-12-25T23:59:11Z", "ms": -189907248534.52533 }, "end": { "local": "1963-12-26T07:59:11+08:00", "utc": "1963-12-25T23:59:11Z", "ms": -189907248534.52533 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1963-12-27", "window": { "start": { "local": "1963-12-27T07:59:36+08:00", "utc": "1963-12-26T23:59:36Z", "ms": -189820824134.09302 }, "end": { "local": "1963-12-27T07:59:36+08:00", "utc": "1963-12-26T23:59:36Z", "ms": -189820824134.09302 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:56 on Thu 26 Dec to 08:07 on Fri 27 Dec.", "fact": "1963-12-26T02:56:29Z → 1963-12-27T00:07:19Z" }, { "step": "kaala", "text": "Sunrise is at 07:59 on the 26th and 08:00 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 464 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Chengdu, 1963: Friday 27 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": "1963-12-27", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-12-27", "confidence": "determinate" } ], "quote": "In Chengdu, Putradā Ekādaśī 1963 falls on Friday 27 December. Ekādaśī runs from 10:56 on Thu 26 Dec to 08:07 on Fri 27 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/chengdu/festivals/1963/ekadashi?on=1963-12-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/chengdu/festivals/1963/pradosha-vrata?on=1963-12-28", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1815286", "year": 1963, "local_date": "1963-12-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20351, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1963-12-28T04:59:04+08:00", "utc": "1963-12-27T20:59:04Z", "ms": -189745255611.90488 }, "end": { "local": "1963-12-29T01:39:47+08:00", "utc": "1963-12-28T17:39:47Z", "ms": -189670813302.20764 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1963-12-28T04:59:04+08:00", "utc": "1963-12-27T20:59:04Z", "ms": -189745255611.90488 }, "end": { "local": "1963-12-29T01:39:47+08:00", "utc": "1963-12-28T17:39:47Z", "ms": -189670813302.20764 } }, "kaala": "pradosha", "days": [ { "local_date": "1963-12-27", "window": { "start": { "local": "1963-12-27T18:09:16+08:00", "utc": "1963-12-27T10:09:16Z", "ms": -189784244345.32993 }, "end": { "local": "1963-12-27T20:00:01+08:00", "utc": "1963-12-27T12:00:01Z", "ms": -189777598594.36536 } }, "covered_min": 0, "window_min": 111, "qualifies": false }, { "local_date": "1963-12-28", "window": { "start": { "local": "1963-12-28T18:09:52+08:00", "utc": "1963-12-28T10:09:52Z", "ms": -189697807646.5476 }, "end": { "local": "1963-12-28T20:00:36+08:00", "utc": "1963-12-28T12:00:36Z", "ms": -189691163932.89615 } }, "covered_min": 111, "window_min": 111, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:59 on Sat 28 Dec to 01:40 on Sun 29 Dec.", "fact": "1963-12-27T20:59:04Z → 1963-12-28T17:39:47Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:09–20:00 on the 27th, 18:10–20:01 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 111 minutes on the 27th and 111 of 111 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 20351 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Chengdu, 1963: Saturday 28 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": "1963-12-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1963-12-28", "confidence": "determinate" } ], "quote": "In Chengdu, Śukla Pradoṣa Vrata 1963 falls on Saturday 28 December. Trayodaśī runs from 04:59 on Sat 28 Dec to 01:40 on Sun 29 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/chengdu/festivals/1963/pradosha-vrata?on=1963-12-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } } ], "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }