{ "id": "/lu-an/festivals/1990", "place": { "id": "1802206", "slug": "lu-an", "name": "Lu’an", "region": "Anhui, China", "country": "CN", "lat": 31.73561, "lon": 116.51688, "elevation_m": 81, "tz": "Asia/Shanghai" }, "year": 1990, "tradition": "smarta", "method": "pac-rp@2026.1", "ruleset": "2026.3-draft", "rulings": [ { "id": "/lu-an/festivals/1990/ekadashi?on=1990-01-07", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22472, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-01-07T01:00:30+08:00", "utc": "1990-01-06T17:00:30Z", "ms": 631645229888.3011 }, "end": { "local": "1990-01-07T22:25:26+08:00", "utc": "1990-01-07T14:25:26Z", "ms": 631722326341.2834 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-01-07T01:00:30+08:00", "utc": "1990-01-06T17:00:30Z", "ms": 631645229888.3011 }, "end": { "local": "1990-01-07T22:25:26+08:00", "utc": "1990-01-07T14:25:26Z", "ms": 631722326341.2834 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-01-07", "window": { "start": { "local": "1990-01-07T07:15:02+08:00", "utc": "1990-01-06T23:15:02Z", "ms": 631667701547.5425 }, "end": { "local": "1990-01-07T07:15:02+08:00", "utc": "1990-01-06T23:15:02Z", "ms": 631667701547.5425 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-01-08", "window": { "start": { "local": "1990-01-08T07:15:05+08:00", "utc": "1990-01-07T23:15:05Z", "ms": 631754104823.5803 }, "end": { "local": "1990-01-08T07:15:05+08:00", "utc": "1990-01-07T23:15:05Z", "ms": 631754104823.5803 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 01:00 on Sun 7 Jan to 22:25 on Sun 7 Jan.", "fact": "1990-01-06T17:00:30Z → 1990-01-07T14:25:26Z" }, { "step": "kaala", "text": "Sunrise is at 07:15 on the 7th and 07:15 on the 8th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 7th and is not on the 8th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 22472 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Lu’an, 1990: Sunday 7 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": "1990-01-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-07", "confidence": "determinate" } ], "quote": "In Lu’an, Putradā Ekādaśī 1990 falls on Sunday 7 January. Ekādaśī runs from 01:00 on Sun 7 Jan to 22:25 on Sun 7 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-01-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-01-08", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-08", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 680, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-01-08T19:48:02+08:00", "utc": "1990-01-08T11:48:02Z", "ms": 631799282133.8108 }, "end": { "local": "1990-01-09T17:15:30+08:00", "utc": "1990-01-09T09:15:30Z", "ms": 631876530026.3162 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-01-08T19:48:02+08:00", "utc": "1990-01-08T11:48:02Z", "ms": 631799282133.8108 }, "end": { "local": "1990-01-09T17:15:30+08:00", "utc": "1990-01-09T09:15:30Z", "ms": 631876530026.3162 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-01-08", "window": { "start": { "local": "1990-01-08T17:26:01+08:00", "utc": "1990-01-08T09:26:01Z", "ms": 631790760579.5232 }, "end": { "local": "1990-01-08T19:16:33+08:00", "utc": "1990-01-08T11:16:33Z", "ms": 631797393348.1757 } }, "covered_min": 0, "window_min": 111, "qualifies": false }, { "local_date": "1990-01-09", "window": { "start": { "local": "1990-01-09T17:26:50+08:00", "utc": "1990-01-09T09:26:50Z", "ms": 631877209979.3245 }, "end": { "local": "1990-01-09T19:17:16+08:00", "utc": "1990-01-09T11:17:16Z", "ms": 631883836129.9312 } }, "covered_min": 0, "window_min": 110, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 19:48 on Mon 8 Jan to 17:16 on Tue 9 Jan.", "fact": "1990-01-08T11:48:02Z → 1990-01-09T09:15:30Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:26–19:17 on the 8th, 17:27–19:17 on the 9th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 111 minutes on the 8th and 0 of 110 on the 9th.", "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 680 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Monday 8 January.", "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": "1990-01-08", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-08", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Monday 8 January. Trayodaśī runs from 19:48 on Mon 8 Jan to 17:16 on Tue 9 Jan, and reaches pradoṣa on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-01-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/bhogi", "festival": "bhogi", "name": "Bhogi", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19792, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-02-13T01:01:31+08:00", "utc": "1990-02-12T17:01:31Z", "ms": 634842091456.4164 } }, "span": { "of": "transit", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 } }, "kaala": "sunset-day", "days": [ { "local_date": "1990-01-14", "window": { "start": { "local": "1990-01-13T17:30:14+08:00", "utc": "1990-01-13T09:30:14Z", "ms": 632223013778.453 }, "end": { "local": "1990-01-14T17:31:06+08:00", "utc": "1990-01-14T09:31:06Z", "ms": 632309466084.6555 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1990-01-15", "window": { "start": { "local": "1990-01-14T17:31:06+08:00", "utc": "1990-01-14T09:31:06Z", "ms": 632309466084.6555 }, "end": { "local": "1990-01-15T17:31:59+08:00", "utc": "1990-01-15T09:31:59Z", "ms": 632395918856.2501 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1990-01-14", "days": -1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 12:01 on Sun 14 Jan.", "fact": "1990-01-14T04:01:14Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 17:31, and the day of the 15th ends at 17:32.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 19792 s" }, { "step": "counted", "text": "Bhogi is kept the day before Pongal: Sunday 14 January is the day taken above.", "fact": "follows: pongal − 1 d" }, { "step": "ruling", "text": "Bhogi, Lu’an, 1990: Saturday 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": "1990-01-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-13", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1990-01-13", "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": "1990-01-13", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } } ], "quote": "In Lu’an, Bhogi 1990 falls on Saturday 13 January. It is kept the day before Pongal, which falls on Sunday 14 January. The Sun enters Makara at 12:01 on Sun 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/lu-an/festivals/1990/bhogi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pongal", "festival": "pongal", "name": "Pongal", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19792, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-02-13T01:01:31+08:00", "utc": "1990-02-12T17:01:31Z", "ms": 634842091456.4164 } }, "span": { "of": "transit", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 } }, "kaala": "sunset-day", "days": [ { "local_date": "1990-01-14", "window": { "start": { "local": "1990-01-13T17:30:14+08:00", "utc": "1990-01-13T09:30:14Z", "ms": 632223013778.453 }, "end": { "local": "1990-01-14T17:31:06+08:00", "utc": "1990-01-14T09:31:06Z", "ms": 632309466084.6555 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1990-01-15", "window": { "start": { "local": "1990-01-14T17:31:06+08:00", "utc": "1990-01-14T09:31:06Z", "ms": 632309466084.6555 }, "end": { "local": "1990-01-15T17:31:59+08:00", "utc": "1990-01-15T09:31:59Z", "ms": 632395918856.2501 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 12:01 on Sun 14 Jan.", "fact": "1990-01-14T04:01:14Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 17:31, and the day of the 15th ends at 17:32.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 19792 s" }, { "step": "ruling", "text": "Pongal, Lu’an, 1990: Sunday 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": "1990-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1990-01-14", "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": "1990-01-14", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } } ], "quote": "In Lu’an, Pongal 1990 falls on Sunday 14 January. The Sun enters Makara at 12:01 on Sun 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/lu-an/festivals/1990/pongal", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/makara-sankranti", "festival": "makara-sankranti", "name": "Makara Saṅkrānti", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 43126, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-02-13T01:01:31+08:00", "utc": "1990-02-12T17:01:31Z", "ms": 634842091456.4164 } }, "span": { "of": "transit", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 } }, "kaala": "civil-day", "days": [ { "local_date": "1990-01-14", "window": { "start": { "local": "1990-01-14T00:00:00+08:00", "utc": "1990-01-13T16:00:00Z", "ms": 632246400000 }, "end": { "local": "1990-01-15T00:00:00+08:00", "utc": "1990-01-14T16:00:00Z", "ms": 632332800000 } }, "covered_min": 1, "window_min": 1440, "qualifies": true }, { "local_date": "1990-01-15", "window": { "start": { "local": "1990-01-15T00:00:00+08:00", "utc": "1990-01-14T16:00:00Z", "ms": 632332800000 }, "end": { "local": "1990-01-16T00:00:00+08:00", "utc": "1990-01-15T16:00:00Z", "ms": 632419200000 } }, "covered_min": 0, "window_min": 1440, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 12:01 on Sun 14 Jan.", "fact": "1990-01-14T04:01:14Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from midnight to midnight, on the clock of Lu’an.", "fact": "civil-day: midnight-to-midnight · Asia/Shanghai" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from midnight. The transit falls on the 14th, not the 15th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from midnight → only-day · margin 43126 s" }, { "step": "ruling", "text": "Makara Saṅkrānti, Lu’an, 1990: Sunday 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": "1990-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "sunrise-day", "local_date": "1990-01-14", "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": "1990-01-14", "statement": "Past sunset, the next day (the Tamil rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } } ], "quote": "In Lu’an, Makara Saṅkrānti 1990 falls on Sunday 14 January. The Sun enters Makara at 12:01 on Sun 14 Jan, and the rule counts the day from midnight.", "cite": "https://ahargana.org/lu-an/festivals/1990/makara-sankranti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-01-14", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37720, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-01-14T10:18:16+08:00", "utc": "1990-01-14T02:18:16Z", "ms": 632283496210.9298 }, "end": { "local": "1990-01-15T10:47:38+08:00", "utc": "1990-01-15T02:47:38Z", "ms": 632371658214.4031 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-14T10:18:16+08:00", "utc": "1990-01-14T02:18:16Z", "ms": 632283496210.9298 }, "end": { "local": "1990-01-15T10:47:38+08:00", "utc": "1990-01-15T02:47:38Z", "ms": 632371658214.4031 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-01-14", "window": { "start": { "local": "1990-01-14T20:46:57+08:00", "utc": "1990-01-14T12:46:57Z", "ms": 632321216633.9799 }, "end": { "local": "1990-01-14T20:46:57+08:00", "utc": "1990-01-14T12:46:57Z", "ms": 632321216633.9799 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-01-15", "window": { "start": { "local": "1990-01-15T21:44:52+08:00", "utc": "1990-01-15T13:44:52Z", "ms": 632411091874.74 }, "end": { "local": "1990-01-15T21:44:52+08:00", "utc": "1990-01-15T13:44:52Z", "ms": 632411091874.74 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:18 on Sun 14 Jan to 10:48 on Mon 15 Jan.", "fact": "1990-01-14T02:18:16Z → 1990-01-15T02:47:38Z" }, { "step": "kaala", "text": "Moonrise is at 20:47 on the 14th and 21:45 on the 15th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 14th and is not on the 15th.", "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 37720 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Sunday 14 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": "1990-01-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-14", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Sunday 14 January. Caturthī runs from 10:18 on Sun 14 Jan to 10:48 on Mon 15 Jan and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-01-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/mattu-pongal", "festival": "mattu-pongal", "name": "Mattu Pongal", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19792, "anga": { "type": "sankranti", "index": 9, "key": "makara", "name": "Makara", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-02-13T01:01:31+08:00", "utc": "1990-02-12T17:01:31Z", "ms": 634842091456.4164 } }, "span": { "of": "transit", "start": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 }, "end": { "local": "1990-01-14T12:01:14+08:00", "utc": "1990-01-14T04:01:14Z", "ms": 632289674348.8148 } }, "kaala": "sunset-day", "days": [ { "local_date": "1990-01-14", "window": { "start": { "local": "1990-01-13T17:30:14+08:00", "utc": "1990-01-13T09:30:14Z", "ms": 632223013778.453 }, "end": { "local": "1990-01-14T17:31:06+08:00", "utc": "1990-01-14T09:31:06Z", "ms": 632309466084.6555 } }, "covered_min": 1, "window_min": 1441, "qualifies": true }, { "local_date": "1990-01-15", "window": { "start": { "local": "1990-01-14T17:31:06+08:00", "utc": "1990-01-14T09:31:06Z", "ms": 632309466084.6555 }, "end": { "local": "1990-01-15T17:31:59+08:00", "utc": "1990-01-15T09:31:59Z", "ms": 632395918856.2501 } }, "covered_min": 0, "window_min": 1441, "qualifies": false } ], "follows": { "festival": "pongal", "name": "Pongal", "local_date": "1990-01-14", "days": 1 }, "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Makara at 12:01 on Sun 14 Jan.", "fact": "1990-01-14T04:01:14Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day is counted from the sunset before it to its own sunset: the day of the 14th ends at 17:31, and the day of the 15th ends at 17:32.", "fact": "sunset-day: sunset-to-sunset · sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from the sunset before it: a transit after sunset belongs to the next day. The transit falls between the sunsets of the 13th and the 14th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunset → only-day · margin 19792 s" }, { "step": "counted", "text": "Mattu Pongal is kept the day after Pongal: Sunday 14 January is the day taken above.", "fact": "follows: pongal + 1 d" }, { "step": "ruling", "text": "Mattu Pongal, Lu’an, 1990: Monday 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": "1990-01-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-15", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1990-01-15", "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": "1990-01-15", "statement": "Counted from sunrise (the Orissa rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Orissa rule: In Orissa the solar months of the Amli and Vilayati eras begin civilly on the same day (sunrise to next sunrise) as the samkranti, irrespective of whether this takes place before or after midnight." } } ], "quote": "In Lu’an, Mattu Pongal 1990 falls on Monday 15 January. It is kept the day after Pongal, which falls on Sunday 14 January. The Sun enters Makara at 12:01 on Sun 14 Jan. The rule counts the day from sunset to sunset, and the transit falls between the sunsets of the 13th and the 14th.", "cite": "https://ahargana.org/lu-an/festivals/1990/mattu-pongal", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-01-22", "festival": "ekadashi", "name": "Ṣaṭtilā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21307, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-01-21T23:22:55+08:00", "utc": "1990-01-21T15:22:55Z", "ms": 632935375427.2538 }, "end": { "local": "1990-01-23T01:17:18+08:00", "utc": "1990-01-22T17:17:18Z", "ms": 633028637926.81 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-21T23:22:55+08:00", "utc": "1990-01-21T15:22:55Z", "ms": 632935375427.2538 }, "end": { "local": "1990-01-23T01:17:18+08:00", "utc": "1990-01-22T17:17:18Z", "ms": 633028637926.81 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-01-22", "window": { "start": { "local": "1990-01-22T07:12:48+08:00", "utc": "1990-01-21T23:12:48Z", "ms": 632963567553.4307 }, "end": { "local": "1990-01-22T07:12:48+08:00", "utc": "1990-01-21T23:12:48Z", "ms": 632963567553.4307 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-01-23", "window": { "start": { "local": "1990-01-23T07:12:25+08:00", "utc": "1990-01-22T23:12:25Z", "ms": 633049944919.4438 }, "end": { "local": "1990-01-23T07:12:25+08:00", "utc": "1990-01-22T23:12:25Z", "ms": 633049944919.4438 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 23:23 on Sun 21 Jan to 01:17 on Tue 23 Jan.", "fact": "1990-01-21T15:22:55Z → 1990-01-22T17:17:18Z" }, { "step": "kaala", "text": "Sunrise is at 07:13 on the 22nd and 07:12 on the 23rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 22nd and is not on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 21307 s" }, { "step": "ruling", "text": "Ṣaṭtilā Ekādaśī, Lu’an, 1990: Monday 22 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": "1990-01-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-22", "confidence": "determinate" } ], "quote": "In Lu’an, Ṣaṭtilā Ekādaśī 1990 falls on Monday 22 January. Ekādaśī runs from 23:23 on Sun 21 Jan to 01:17 on Tue 23 Jan and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-01-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-01-24", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25961, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-01-24T02:40:16+08:00", "utc": "1990-01-23T18:40:16Z", "ms": 633120016220.5319 }, "end": { "local": "1990-01-25T03:28:10+08:00", "utc": "1990-01-24T19:28:10Z", "ms": 633209290274.3502 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-24T02:40:16+08:00", "utc": "1990-01-23T18:40:16Z", "ms": 633120016220.5319 }, "end": { "local": "1990-01-25T03:28:10+08:00", "utc": "1990-01-24T19:28:10Z", "ms": 633209290274.3502 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-01-23", "window": { "start": { "local": "1990-01-23T17:39:13+08:00", "utc": "1990-01-23T09:39:13Z", "ms": 633087553065.1995 }, "end": { "local": "1990-01-23T19:27:35+08:00", "utc": "1990-01-23T11:27:35Z", "ms": 633094055407.2924 } }, "covered_min": 0, "window_min": 108, "qualifies": false }, { "local_date": "1990-01-24", "window": { "start": { "local": "1990-01-24T17:40:08+08:00", "utc": "1990-01-24T09:40:08Z", "ms": 633174008259.3794 }, "end": { "local": "1990-01-24T19:28:20+08:00", "utc": "1990-01-24T11:28:20Z", "ms": 633180499785.0436 } }, "covered_min": 108, "window_min": 108, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:40 on Wed 24 Jan to 03:28 on Thu 25 Jan.", "fact": "1990-01-23T18:40:16Z → 1990-01-24T19:28:10Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:39–19:28 on the 23rd, 17:40–19:28 on the 24th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 108 minutes on the 23rd and 108 of 108 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25961 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Wednesday 24 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": "1990-01-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-24", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Wednesday 24 January. Trayodaśī runs from 02:40 on Wed 24 Jan to 03:28 on Thu 25 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-01-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/yama-tarpana", "festival": "yama-tarpana", "name": "Yama Tarpaṇa", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 6145, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-01-25T03:28:10+08:00", "utc": "1990-01-24T19:28:10Z", "ms": 633209290274.3502 }, "end": { "local": "1990-01-26T03:40:41+08:00", "utc": "1990-01-25T19:40:41Z", "ms": 633296441210.9111 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-25T03:28:10+08:00", "utc": "1990-01-24T19:28:10Z", "ms": 633209290274.3502 }, "end": { "local": "1990-01-26T03:40:41+08:00", "utc": "1990-01-25T19:40:41Z", "ms": 633296441210.9111 } }, "kaala": "arunodaya", "days": [ { "local_date": "1990-01-25", "window": { "start": { "local": "1990-01-25T05:23:23+08:00", "utc": "1990-01-24T21:23:23Z", "ms": 633216203176.1967 }, "end": { "local": "1990-01-25T07:11:35+08:00", "utc": "1990-01-24T23:11:35Z", "ms": 633222694701.8608 } }, "covered_min": 108, "window_min": 108, "qualifies": true }, { "local_date": "1990-01-26", "window": { "start": { "local": "1990-01-26T05:23:07+08:00", "utc": "1990-01-25T21:23:07Z", "ms": 633302586664.6787 }, "end": { "local": "1990-01-26T07:11:07+08:00", "utc": "1990-01-25T23:11:07Z", "ms": 633309067146.9672 } }, "covered_min": 0, "window_min": 108, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 03:28 on Thu 25 Jan to 03:41 on Fri 26 Jan.", "fact": "1990-01-24T19:28:10Z → 1990-01-25T19:40:41Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:23–07:12 on the 25th, 05:23–07:11 on the 26th.", "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 25th and 0 of 108 on the 26th.", "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 6145 s" }, { "step": "ruling", "text": "Yama Tarpaṇa, Lu’an, 1990: Thursday 25 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": "1990-01-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-25", "confidence": "determinate" } ], "quote": "In Lu’an, Yama Tarpaṇa 1990 falls on Thursday 25 January. Caturdaśī runs from 03:28 on Thu 25 Jan to 03:41 on Fri 26 Jan and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/lu-an/festivals/1990/yama-tarpana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-01-25", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9499, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-01-25T03:28:10+08:00", "utc": "1990-01-24T19:28:10Z", "ms": 633209290274.3502 }, "end": { "local": "1990-01-26T03:40:41+08:00", "utc": "1990-01-25T19:40:41Z", "ms": 633296441210.9111 }, "month": { "amanta": 9, "purnimanta": 10, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-25T03:28:10+08:00", "utc": "1990-01-24T19:28:10Z", "ms": 633209290274.3502 }, "end": { "local": "1990-01-26T03:40:41+08:00", "utc": "1990-01-25T19:40:41Z", "ms": 633296441210.9111 } }, "kaala": "nishita", "days": [ { "local_date": "1990-01-24", "window": { "start": { "local": "1990-01-25T00:01:51+08:00", "utc": "1990-01-24T16:01:51Z", "ms": 633196911480.6201 }, "end": { "local": "1990-01-25T00:49:51+08:00", "utc": "1990-01-24T16:49:51Z", "ms": 633199791480.6201 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-01-25", "window": { "start": { "local": "1990-01-26T00:02:05+08:00", "utc": "1990-01-25T16:02:05Z", "ms": 633283325338.3854 }, "end": { "local": "1990-01-26T00:50:05+08:00", "utc": "1990-01-25T16:50:05Z", "ms": 633286205338.3854 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 03:28 on Thu 25 Jan to 03:41 on Fri 26 Jan.", "fact": "1990-01-24T19:28:10Z → 1990-01-25T19:40:41Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:02–00:50 on the 24th, 00:02–00:50 on the 25th.", "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 24th and 48 of 48 on the 25th.", "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 9499 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Thursday 25 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": "1990-01-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-25", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Thursday 25 January. Caturdaśī runs from 03:28 on Thu 25 Jan to 03:41 on Fri 26 Jan and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-01-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ganesha-jayanti", "festival": "ganesha-jayanti", "name": "Gaṇeśa Jayantī", "everyday": "Maghi Ganesh Jayanti", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32436, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-01-29T23:41:08+08:00", "utc": "1990-01-29T15:41:08Z", "ms": 633627667624.2236 }, "end": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-29T23:41:08+08:00", "utc": "1990-01-29T15:41:08Z", "ms": 633627667624.2236 }, "end": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-01-29", "window": { "start": { "local": "1990-01-29T12:03:10+08:00", "utc": "1990-01-29T04:03:10Z", "ms": 633585789762.0664 }, "end": { "local": "1990-01-29T12:51:10+08:00", "utc": "1990-01-29T04:51:10Z", "ms": 633588669762.0664 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-01-30", "window": { "start": { "local": "1990-01-30T12:03:20+08:00", "utc": "1990-01-30T04:03:20Z", "ms": 633672200368.2654 }, "end": { "local": "1990-01-30T12:51:20+08:00", "utc": "1990-01-30T04:51:20Z", "ms": 633675080368.2654 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:41 on Mon 29 Jan to 21:52 on Tue 30 Jan.", "fact": "1990-01-29T15:41:08Z → 1990-01-30T13:51:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 29th, 12:03–12:51 on the 30th.", "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 29th and 48 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 32436 s" }, { "step": "ruling", "text": "Gaṇeśa Jayantī, Lu’an, 1990: Tuesday 30 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": "1990-01-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-30", "confidence": "determinate" } ], "quote": "In Lu’an, Gaṇeśa Jayantī (Maghi Ganesh Jayanti) 1990 falls on Tuesday 30 January. Caturthī runs from 23:41 on Mon 29 Jan to 21:52 on Tue 30 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/tila-chaturthi", "festival": "tila-chaturthi", "name": "Tila Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8355, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-01-29T23:41:08+08:00", "utc": "1990-01-29T15:41:08Z", "ms": 633627667624.2236 }, "end": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-29T23:41:08+08:00", "utc": "1990-01-29T15:41:08Z", "ms": 633627667624.2236 }, "end": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-01-29", "window": { "start": { "local": "1990-01-29T17:44:45+08:00", "utc": "1990-01-29T09:44:45Z", "ms": 633606284642.663 }, "end": { "local": "1990-01-29T19:31:59+08:00", "utc": "1990-01-29T11:31:59Z", "ms": 633612718821.1143 } }, "covered_min": 0, "window_min": 107, "qualifies": false }, { "local_date": "1990-01-30", "window": { "start": { "local": "1990-01-30T17:45:40+08:00", "utc": "1990-01-30T09:45:40Z", "ms": 633692739755.4829 }, "end": { "local": "1990-01-30T19:32:42+08:00", "utc": "1990-01-30T11:32:42Z", "ms": 633699161859.8419 } }, "covered_min": 107, "window_min": 107, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 23:41 on Mon 29 Jan to 21:52 on Tue 30 Jan.", "fact": "1990-01-29T15:41:08Z → 1990-01-30T13:51:57Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:45–19:32 on the 29th, 17:46–19:33 on the 30th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during pradoṣa. It covers 0 of 107 minutes on the 29th and 107 of 107 on the 30th.", "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 8355 s" }, { "step": "ruling", "text": "Tila Caturthī, Lu’an, 1990: Tuesday 30 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": "1990-01-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-30", "confidence": "determinate" } ], "quote": "In Lu’an, Tila Caturthī 1990 falls on Tuesday 30 January. Caturthī runs from 23:41 on Mon 29 Jan to 21:52 on Tue 30 Jan and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/shri-panchami", "festival": "shri-panchami", "name": "Śrī Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25248, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 }, "end": { "local": "1990-01-31T19:52:18+08:00", "utc": "1990-01-31T11:52:18Z", "ms": 633786738471.4253 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 }, "end": { "local": "1990-01-31T19:52:18+08:00", "utc": "1990-01-31T11:52:18Z", "ms": 633786738471.4253 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-01-30", "window": { "start": { "local": "1990-01-30T12:03:20+08:00", "utc": "1990-01-30T04:03:20Z", "ms": 633672200368.2654 }, "end": { "local": "1990-01-30T12:51:20+08:00", "utc": "1990-01-30T04:51:20Z", "ms": 633675080368.2654 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-01-31", "window": { "start": { "local": "1990-01-31T12:03:30+08:00", "utc": "1990-01-31T04:03:30Z", "ms": 633758610138.3403 }, "end": { "local": "1990-01-31T12:51:30+08:00", "utc": "1990-01-31T04:51:30Z", "ms": 633761490138.3403 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 21:52 on Tue 30 Jan to 19:52 on Wed 31 Jan.", "fact": "1990-01-30T13:51:57Z → 1990-01-31T11:52:18Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 30th, 12:04–12:52 on the 31st.", "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 30th and 48 of 48 on the 31st.", "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 25248 s" }, { "step": "ruling", "text": "Śrī Pañcamī, Lu’an, 1990: Wednesday 31 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": "1990-01-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-31", "confidence": "determinate" } ], "quote": "In Lu’an, Śrī Pañcamī 1990 falls on Wednesday 31 January. Pañcamī runs from 21:52 on Tue 30 Jan to 19:52 on Wed 31 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/vasanta-panchami", "festival": "vasanta-panchami", "name": "Vasanta Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-01-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25248, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 }, "end": { "local": "1990-01-31T19:52:18+08:00", "utc": "1990-01-31T11:52:18Z", "ms": 633786738471.4253 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-01-30T21:51:57+08:00", "utc": "1990-01-30T13:51:57Z", "ms": 633707516807.0043 }, "end": { "local": "1990-01-31T19:52:18+08:00", "utc": "1990-01-31T11:52:18Z", "ms": 633786738471.4253 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-01-30", "window": { "start": { "local": "1990-01-30T12:03:20+08:00", "utc": "1990-01-30T04:03:20Z", "ms": 633672200368.2654 }, "end": { "local": "1990-01-30T12:51:20+08:00", "utc": "1990-01-30T04:51:20Z", "ms": 633675080368.2654 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-01-31", "window": { "start": { "local": "1990-01-31T12:03:30+08:00", "utc": "1990-01-31T04:03:30Z", "ms": 633758610138.3403 }, "end": { "local": "1990-01-31T12:51:30+08:00", "utc": "1990-01-31T04:51:30Z", "ms": 633761490138.3403 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 21:52 on Tue 30 Jan to 19:52 on Wed 31 Jan.", "fact": "1990-01-30T13:51:57Z → 1990-01-31T11:52:18Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 30th, 12:04–12:52 on the 31st.", "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 30th and 48 of 48 on the 31st.", "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 25248 s" }, { "step": "ruling", "text": "Vasanta Pañcamī, Lu’an, 1990: Wednesday 31 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": "1990-01-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-01-31", "confidence": "determinate" } ], "quote": "In Lu’an, Vasanta Pañcamī 1990 falls on Wednesday 31 January. Pañcamī runs from 21:52 on Tue 30 Jan to 19:52 on Wed 31 Jan and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/ratha-saptami", "festival": "ratha-saptami", "name": "Ratha Saptamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30594, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1990-02-01T17:46:10+08:00", "utc": "1990-02-01T09:46:10Z", "ms": 633865570196.2764 }, "end": { "local": "1990-02-02T15:37:04+08:00", "utc": "1990-02-02T07:37:04Z", "ms": 633944223828.1309 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-02-01T17:46:10+08:00", "utc": "1990-02-01T09:46:10Z", "ms": 633865570196.2764 }, "end": { "local": "1990-02-02T15:37:04+08:00", "utc": "1990-02-02T07:37:04Z", "ms": 633944223828.1309 } }, "kaala": "arunodaya", "days": [ { "local_date": "1990-02-01", "window": { "start": { "local": "1990-02-01T05:20:59+08:00", "utc": "1990-01-31T21:20:59Z", "ms": 633820858728.5297 }, "end": { "local": "1990-02-01T07:07:49+08:00", "utc": "1990-01-31T23:07:49Z", "ms": 633827268573.1488 } }, "covered_min": 0, "window_min": 107, "qualifies": false }, { "local_date": "1990-02-02", "window": { "start": { "local": "1990-02-02T05:20:33+08:00", "utc": "1990-02-01T21:20:33Z", "ms": 633907232702.4937 }, "end": { "local": "1990-02-02T07:07:10+08:00", "utc": "1990-02-01T23:07:10Z", "ms": 633913630108.4624 } }, "covered_min": 107, "window_min": 107, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 17:46 on Thu 1 Feb to 15:37 on Fri 2 Feb.", "fact": "1990-02-01T09:46:10Z → 1990-02-02T07:37:04Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 05:21–07:08 on the 1st, 05:21–07:07 on the 2nd.", "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 1st and 107 of 107 on the 2nd.", "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 30594 s" }, { "step": "ruling", "text": "Ratha Saptamī, Lu’an, 1990: Friday 2 February.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ratha-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 105", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Ratha saptami (covering 4 ghatikas before sunrise), Acala saptami, Vidhana saptami, Arogya saptami [purvaviddha]." } ], "kaala": "arunodaya", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-02-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-02", "confidence": "determinate" } ], "quote": "In Lu’an, Ratha Saptamī 1990 falls on Friday 2 February. Saptamī runs from 17:46 on Thu 1 Feb to 15:37 on Fri 2 Feb and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/ekadashi?on=1990-02-06", "festival": "ekadashi", "name": "Jayā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1814, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-02-05T09:23:43+08:00", "utc": "1990-02-05T01:23:43Z", "ms": 634181022719.8356 }, "end": { "local": "1990-02-06T07:34:36+08:00", "utc": "1990-02-05T23:34:36Z", "ms": 634260875975.4829 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-02-05T09:23:43+08:00", "utc": "1990-02-05T01:23:43Z", "ms": 634181022719.8356 }, "end": { "local": "1990-02-06T07:34:36+08:00", "utc": "1990-02-05T23:34:36Z", "ms": 634260875975.4829 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-02-05", "window": { "start": { "local": "1990-02-05T07:05:06+08:00", "utc": "1990-02-04T23:05:06Z", "ms": 634172705958.7661 }, "end": { "local": "1990-02-05T07:05:06+08:00", "utc": "1990-02-04T23:05:06Z", "ms": 634172705958.7661 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-02-06", "window": { "start": { "local": "1990-02-06T07:04:22+08:00", "utc": "1990-02-05T23:04:22Z", "ms": 634259061745.8167 }, "end": { "local": "1990-02-06T07:04:22+08:00", "utc": "1990-02-05T23:04:22Z", "ms": 634259061745.8167 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 09:24 on Mon 5 Feb to 07:35 on Tue 6 Feb.", "fact": "1990-02-05T01:23:43Z → 1990-02-05T23:34:36Z" }, { "step": "kaala", "text": "Sunrise is at 07:05 on the 5th and 07:04 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 1814 s" }, { "step": "ruling", "text": "Jayā Ekādaśī, Lu’an, 1990: Tuesday 6 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": "1990-02-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-06", "confidence": "determinate" } ], "quote": "In Lu’an, Jayā Ekādaśī 1990 falls on Tuesday 6 February. Ekādaśī runs from 09:24 on Mon 5 Feb to 07:35 on Tue 6 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-02-06", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/bhishma-dvadashi", "festival": "bhishma-dvadashi", "name": "Bhīṣma Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16175, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-02-06T07:34:36+08:00", "utc": "1990-02-05T23:34:36Z", "ms": 634260875975.4829 }, "end": { "local": "1990-02-07T05:59:06+08:00", "utc": "1990-02-06T21:59:06Z", "ms": 634341545551.7134 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-02-06T07:34:36+08:00", "utc": "1990-02-05T23:34:36Z", "ms": 634260875975.4829 }, "end": { "local": "1990-02-07T05:59:06+08:00", "utc": "1990-02-06T21:59:06Z", "ms": 634341545551.7134 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-02-06", "window": { "start": { "local": "1990-02-06T12:04:11+08:00", "utc": "1990-02-06T04:04:11Z", "ms": 634277051123.5901 }, "end": { "local": "1990-02-06T12:52:11+08:00", "utc": "1990-02-06T04:52:11Z", "ms": 634279931123.5901 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-02-07", "window": { "start": { "local": "1990-02-07T12:04:15+08:00", "utc": "1990-02-07T04:04:15Z", "ms": 634363455043.7102 }, "end": { "local": "1990-02-07T12:52:15+08:00", "utc": "1990-02-07T04:52:15Z", "ms": 634366335043.7102 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 07:35 on Tue 6 Feb to 05:59 on Wed 7 Feb.", "fact": "1990-02-05T23:34:36Z → 1990-02-06T21:59:06Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:04–12:52 on the 6th, 12:04–12:52 on the 7th.", "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 6th and 0 of 48 on the 7th.", "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 16175 s" }, { "step": "ruling", "text": "Bhīṣma Dvādaśī, Lu’an, 1990: Tuesday 6 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": "1990-02-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-06", "confidence": "determinate" } ], "quote": "In Lu’an, Bhīṣma Dvādaśī 1990 falls on Tuesday 6 February. Dvādaśī runs from 07:35 on Tue 6 Feb to 05:59 on Wed 7 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/pradosha-vrata?on=1990-02-07", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32582, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-02-07T05:59:06+08:00", "utc": "1990-02-06T21:59:06Z", "ms": 634341545551.7134 }, "end": { "local": "1990-02-08T04:41:15+08:00", "utc": "1990-02-07T20:41:15Z", "ms": 634423275258.8938 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-02-07T05:59:06+08:00", "utc": "1990-02-06T21:59:06Z", "ms": 634341545551.7134 }, "end": { "local": "1990-02-08T04:41:15+08:00", "utc": "1990-02-07T20:41:15Z", "ms": 634423275258.8938 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-02-06", "window": { "start": { "local": "1990-02-06T17:52:01+08:00", "utc": "1990-02-06T09:52:01Z", "ms": 634297920501.3634 }, "end": { "local": "1990-02-06T19:37:33+08:00", "utc": "1990-02-06T11:37:33Z", "ms": 634304253256.5305 } }, "covered_min": 0, "window_min": 106, "qualifies": false }, { "local_date": "1990-02-07", "window": { "start": { "local": "1990-02-07T17:52:54+08:00", "utc": "1990-02-07T09:52:54Z", "ms": 634384373922.3035 }, "end": { "local": "1990-02-07T19:38:13+08:00", "utc": "1990-02-07T11:38:13Z", "ms": 634390693298.796 } }, "covered_min": 105, "window_min": 105, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 05:59 on Wed 7 Feb to 04:41 on Thu 8 Feb.", "fact": "1990-02-06T21:59:06Z → 1990-02-07T20:41:15Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:52–19:38 on the 6th, 17:53–19:38 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 106 minutes on the 6th and 105 of 105 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 32582 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Wednesday 7 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": "1990-02-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-07", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Wednesday 7 February. Trayodaśī runs from 05:59 on Wed 7 Feb to 04:41 on Thu 8 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-02-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/maghi-purnima", "festival": "maghi-purnima", "name": "Māghī Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29938, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-02-09T03:45:23+08:00", "utc": "1990-02-08T19:45:23Z", "ms": 634506322792.6774 }, "end": { "local": "1990-02-10T03:15:44+08:00", "utc": "1990-02-09T19:15:44Z", "ms": 634590944011.1886 }, "month": { "amanta": 10, "purnimanta": 10, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Māgha" } }, "span": { "of": "tithi", "start": { "local": "1990-02-09T03:45:23+08:00", "utc": "1990-02-08T19:45:23Z", "ms": 634506322792.6774 }, "end": { "local": "1990-02-10T03:15:44+08:00", "utc": "1990-02-09T19:15:44Z", "ms": 634590944011.1886 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-02-09", "window": { "start": { "local": "1990-02-09T12:04:20+08:00", "utc": "1990-02-09T04:04:20Z", "ms": 634536260456.1404 }, "end": { "local": "1990-02-09T12:52:20+08:00", "utc": "1990-02-09T04:52:20Z", "ms": 634539140456.1404 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-02-10", "window": { "start": { "local": "1990-02-10T12:04:22+08:00", "utc": "1990-02-10T04:04:22Z", "ms": 634622661969.9006 }, "end": { "local": "1990-02-10T12:52:22+08:00", "utc": "1990-02-10T04:52:22Z", "ms": 634625541969.9006 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 03:45 on Fri 9 Feb to 03:16 on Sat 10 Feb.", "fact": "1990-02-08T19:45:23Z → 1990-02-09T19:15:44Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:04–12:52 on the 9th, 12:04–12:52 on the 10th.", "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 9th and 0 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 29938 s" }, { "step": "ruling", "text": "Māghī Pūrṇimā, Lu’an, 1990: Friday 9 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": "1990-02-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-09", "confidence": "determinate" } ], "quote": "In Lu’an, Māghī Pūrṇimā 1990 falls on Friday 9 February. Pūrṇimā runs from 03:45 on Fri 9 Feb to 03:16 on Sat 10 Feb and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-02-13", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30480, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-02-13T04:56:03+08:00", "utc": "1990-02-12T20:56:03Z", "ms": 634856163278.0697 }, "end": { "local": "1990-02-14T06:34:45+08:00", "utc": "1990-02-13T22:34:45Z", "ms": 634948484973.7311 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-02-13T04:56:03+08:00", "utc": "1990-02-12T20:56:03Z", "ms": 634856163278.0697 }, "end": { "local": "1990-02-14T06:34:45+08:00", "utc": "1990-02-13T22:34:45Z", "ms": 634948484973.7311 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-02-12", "window": { "start": { "local": "1990-02-12T20:28:03+08:00", "utc": "1990-02-12T12:28:03Z", "ms": 634825683296.8538 }, "end": { "local": "1990-02-12T20:28:03+08:00", "utc": "1990-02-12T12:28:03Z", "ms": 634825683296.8538 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-02-13", "window": { "start": { "local": "1990-02-13T21:24:11+08:00", "utc": "1990-02-13T13:24:11Z", "ms": 634915451348.611 }, "end": { "local": "1990-02-13T21:24:11+08:00", "utc": "1990-02-13T13:24:11Z", "ms": 634915451348.611 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 04:56 on Tue 13 Feb to 06:35 on Wed 14 Feb.", "fact": "1990-02-12T20:56:03Z → 1990-02-13T22:34:45Z" }, { "step": "kaala", "text": "Moonrise is at 20:28 on the 12th and 21:24 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 30480 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Tuesday 13 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": "1990-02-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-13", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Tuesday 13 February. Caturthī runs from 04:56 on Tue 13 Feb to 06:35 on Wed 14 Feb and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-02-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-02-21", "festival": "ekadashi", "name": "Vijayā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37567, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-02-20T19:31:52+08:00", "utc": "1990-02-20T11:31:52Z", "ms": 635513511600.9386 }, "end": { "local": "1990-02-21T20:23:41+08:00", "utc": "1990-02-21T12:23:41Z", "ms": 635603021226.5336 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-02-20T19:31:52+08:00", "utc": "1990-02-20T11:31:52Z", "ms": 635513511600.9386 }, "end": { "local": "1990-02-21T20:23:41+08:00", "utc": "1990-02-21T12:23:41Z", "ms": 635603021226.5336 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-02-21", "window": { "start": { "local": "1990-02-21T06:50:51+08:00", "utc": "1990-02-20T22:50:51Z", "ms": 635554251190.8413 }, "end": { "local": "1990-02-21T06:50:51+08:00", "utc": "1990-02-20T22:50:51Z", "ms": 635554251190.8413 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-02-22", "window": { "start": { "local": "1990-02-22T06:49:49+08:00", "utc": "1990-02-21T22:49:49Z", "ms": 635640588692.3425 }, "end": { "local": "1990-02-22T06:49:49+08:00", "utc": "1990-02-21T22:49:49Z", "ms": 635640588692.3425 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 19:32 on Tue 20 Feb to 20:24 on Wed 21 Feb.", "fact": "1990-02-20T11:31:52Z → 1990-02-21T12:23:41Z" }, { "step": "kaala", "text": "Sunrise is at 06:51 on the 21st and 06:50 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 37567 s" }, { "step": "ruling", "text": "Vijayā Ekādaśī, Lu’an, 1990: Wednesday 21 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": "1990-02-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-21", "confidence": "determinate" } ], "quote": "In Lu’an, Vijayā Ekādaśī 1990 falls on Wednesday 21 February. Ekādaśī runs from 19:32 on Tue 20 Feb to 20:24 on Wed 21 Feb and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-02-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/maha-shivaratri", "festival": "maha-shivaratri", "name": "Mahāśivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14732, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-02-23T19:57:32+08:00", "utc": "1990-02-23T11:57:32Z", "ms": 635774251621.7256 }, "end": { "local": "1990-02-24T18:43:01+08:00", "utc": "1990-02-24T10:43:01Z", "ms": 635856180773.4911 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-02-23T19:57:32+08:00", "utc": "1990-02-23T11:57:32Z", "ms": 635774251621.7256 }, "end": { "local": "1990-02-24T18:43:01+08:00", "utc": "1990-02-24T10:43:01Z", "ms": 635856180773.4911 } }, "kaala": "nishita", "days": [ { "local_date": "1990-02-23", "window": { "start": { "local": "1990-02-24T00:03:03+08:00", "utc": "1990-02-23T16:03:03Z", "ms": 635788983246.0032 }, "end": { "local": "1990-02-24T00:51:03+08:00", "utc": "1990-02-23T16:51:03Z", "ms": 635791863246.0032 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-02-24", "window": { "start": { "local": "1990-02-25T00:02:55+08:00", "utc": "1990-02-24T16:02:55Z", "ms": 635875374605.0214 }, "end": { "local": "1990-02-25T00:50:55+08:00", "utc": "1990-02-24T16:50:55Z", "ms": 635878254605.0214 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 19:58 on Fri 23 Feb to 18:43 on Sat 24 Feb.", "fact": "1990-02-23T11:57:32Z → 1990-02-24T10:43:01Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:03–00:51 on the 23rd, 00:03–00:51 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. 105" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 14732 s" }, { "step": "ruling", "text": "Mahāśivarātri, Lu’an, 1990: Friday 23 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": "1990-02-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-23", "confidence": "determinate" } ], "quote": "In Lu’an, Mahāśivarātri 1990 falls on Friday 23 February. Caturdaśī runs from 19:58 on Fri 23 Feb to 18:43 on Sat 24 Feb and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/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": "/lu-an/festivals/1990/pradosha-vrata?on=1990-02-23", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 576, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-02-22T20:32:12+08:00", "utc": "1990-02-22T12:32:12Z", "ms": 635689932279.4508 }, "end": { "local": "1990-02-23T19:57:32+08:00", "utc": "1990-02-23T11:57:32Z", "ms": 635774251621.7256 }, "month": { "amanta": 10, "purnimanta": 11, "adhika": false, "amanta_name": "Māgha", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-02-22T20:32:12+08:00", "utc": "1990-02-22T12:32:12Z", "ms": 635689932279.4508 }, "end": { "local": "1990-02-23T19:57:32+08:00", "utc": "1990-02-23T11:57:32Z", "ms": 635774251621.7256 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-02-22", "window": { "start": { "local": "1990-02-22T18:05:37+08:00", "utc": "1990-02-22T10:05:37Z", "ms": 635681137277.5024 }, "end": { "local": "1990-02-22T19:47:22+08:00", "utc": "1990-02-22T11:47:22Z", "ms": 635687242347.6722 } }, "covered_min": 0, "window_min": 102, "qualifies": false }, { "local_date": "1990-02-23", "window": { "start": { "local": "1990-02-23T18:06:25+08:00", "utc": "1990-02-23T10:06:25Z", "ms": 635767585438.7006 }, "end": { "local": "1990-02-23T19:47:56+08:00", "utc": "1990-02-23T11:47:56Z", "ms": 635773675520.648 } }, "covered_min": 102, "window_min": 102, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:32 on Thu 22 Feb to 19:58 on Fri 23 Feb.", "fact": "1990-02-22T12:32:12Z → 1990-02-23T11:57:32Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:06–19:47 on the 22nd, 18:06–19:48 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 102 minutes on the 22nd and 102 of 102 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 576 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Friday 23 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": "1990-02-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-23", "confidence": "boundary" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Friday 23 February. Trayodaśī runs from 20:32 on Thu 22 Feb to 19:58 on Fri 23 Feb and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-02-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-02-28", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-02-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9768, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-02-28T09:20:00+08:00", "utc": "1990-02-28T01:20:00Z", "ms": 636168000025.3899 }, "end": { "local": "1990-03-01T06:32:48+08:00", "utc": "1990-02-28T22:32:48Z", "ms": 636244368122.118 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-02-28T09:20:00+08:00", "utc": "1990-02-28T01:20:00Z", "ms": 636168000025.3899 }, "end": { "local": "1990-03-01T06:32:48+08:00", "utc": "1990-02-28T22:32:48Z", "ms": 636244368122.118 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-02-28", "window": { "start": { "local": "1990-02-28T12:02:48+08:00", "utc": "1990-02-28T04:02:48Z", "ms": 636177768402.344 }, "end": { "local": "1990-02-28T12:50:48+08:00", "utc": "1990-02-28T04:50:48Z", "ms": 636180648402.344 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-03-01", "window": { "start": { "local": "1990-03-01T12:02:37+08:00", "utc": "1990-03-01T04:02:37Z", "ms": 636264157318.4336 }, "end": { "local": "1990-03-01T12:50:37+08:00", "utc": "1990-03-01T04:50:37Z", "ms": 636267037318.4336 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 09:20 on Wed 28 Feb to 06:33 on Thu 1 Mar.", "fact": "1990-02-28T01:20:00Z → 1990-02-28T22:32:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 28th, 12:03–12:51 on the 1st.", "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 1st.", "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 9768 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Wednesday 28 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": "1990-02-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-02-28", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Wednesday 28 February. Caturthī runs from 09:20 on Wed 28 Feb to 06:33 on Thu 1 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-02-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-03-07", "festival": "ekadashi", "name": "Āmalakī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 40396, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-03-06T18:31:31+08:00", "utc": "1990-03-06T10:31:31Z", "ms": 636719490965.5552 }, "end": { "local": "1990-03-07T17:48:21+08:00", "utc": "1990-03-07T09:48:21Z", "ms": 636803300909.2358 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-03-06T18:31:31+08:00", "utc": "1990-03-06T10:31:31Z", "ms": 636719490965.5552 }, "end": { "local": "1990-03-07T17:48:21+08:00", "utc": "1990-03-07T09:48:21Z", "ms": 636803300909.2358 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-03-06", "window": { "start": { "local": "1990-03-06T06:36:17+08:00", "utc": "1990-03-05T22:36:17Z", "ms": 636676577134.0706 }, "end": { "local": "1990-03-06T06:36:17+08:00", "utc": "1990-03-05T22:36:17Z", "ms": 636676577134.0706 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-03-07", "window": { "start": { "local": "1990-03-07T06:35:05+08:00", "utc": "1990-03-06T22:35:05Z", "ms": 636762905222.0269 }, "end": { "local": "1990-03-07T06:35:05+08:00", "utc": "1990-03-06T22:35:05Z", "ms": 636762905222.0269 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:32 on Tue 6 Mar to 17:48 on Wed 7 Mar.", "fact": "1990-03-06T10:31:31Z → 1990-03-07T09:48:21Z" }, { "step": "kaala", "text": "Sunrise is at 06:36 on the 6th and 06:35 on the 7th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 6th and is on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 40396 s" }, { "step": "ruling", "text": "Āmalakī Ekādaśī, Lu’an, 1990: Wednesday 7 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": "1990-03-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-07", "confidence": "determinate" } ], "quote": "In Lu’an, Āmalakī Ekādaśī 1990 falls on Wednesday 7 March. Ekādaśī runs from 18:32 on Tue 6 Mar to 17:48 on Wed 7 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-03-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-03-08", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2529, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-03-08T17:29:31+08:00", "utc": "1990-03-08T09:29:31Z", "ms": 636888570974.1334 }, "end": { "local": "1990-03-09T17:34:53+08:00", "utc": "1990-03-09T09:34:53Z", "ms": 636975293343.4507 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-03-08T17:29:31+08:00", "utc": "1990-03-08T09:29:31Z", "ms": 636888570974.1334 }, "end": { "local": "1990-03-09T17:34:53+08:00", "utc": "1990-03-09T09:34:53Z", "ms": 636975293343.4507 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-03-08", "window": { "start": { "local": "1990-03-08T18:16:19+08:00", "utc": "1990-03-08T10:16:19Z", "ms": 636891378946.7114 }, "end": { "local": "1990-03-08T19:54:30+08:00", "utc": "1990-03-08T11:54:30Z", "ms": 636897269736.5126 } }, "covered_min": 98, "window_min": 98, "qualifies": true }, { "local_date": "1990-03-09", "window": { "start": { "local": "1990-03-09T18:17:02+08:00", "utc": "1990-03-09T10:17:02Z", "ms": 636977822251.1981 }, "end": { "local": "1990-03-09T19:54:57+08:00", "utc": "1990-03-09T11:54:57Z", "ms": 636983697483.5088 } }, "covered_min": 0, "window_min": 98, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 17:30 on Thu 8 Mar to 17:35 on Fri 9 Mar.", "fact": "1990-03-08T09:29:31Z → 1990-03-09T09:34:53Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:16–19:54 on the 8th, 18:17–19:55 on the 9th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 98 of 98 minutes on the 8th and 0 of 98 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 2529 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Thursday 8 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": "1990-03-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-08", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Thursday 8 March. Trayodaśī runs from 17:30 on Thu 8 Mar to 17:35 on Fri 9 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-03-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/holika-dahana", "festival": "holika-dahana", "name": "Holikā Dahana", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-11", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 796, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-03-10T18:04:30+08:00", "utc": "1990-03-10T10:04:30Z", "ms": 637063469670.9183 }, "end": { "local": "1990-03-11T18:58:30+08:00", "utc": "1990-03-11T10:58:30Z", "ms": 637153109991.6724 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-03-10T18:04:30+08:00", "utc": "1990-03-10T10:04:30Z", "ms": 637063469670.9183 }, "end": { "local": "1990-03-11T18:58:30+08:00", "utc": "1990-03-11T10:58:30Z", "ms": 637153109991.6724 } }, "kaala": "sayahna", "days": [ { "local_date": "1990-03-10", "window": { "start": { "local": "1990-03-10T15:56:30+08:00", "utc": "1990-03-10T07:56:30Z", "ms": 637055789516.5535 }, "end": { "local": "1990-03-10T18:17:45+08:00", "utc": "1990-03-10T10:17:45Z", "ms": 637064265272.3099 } }, "covered_min": 13, "window_min": 141, "qualifies": true }, { "local_date": "1990-03-11", "window": { "start": { "local": "1990-03-11T15:56:49+08:00", "utc": "1990-03-11T07:56:49Z", "ms": 637142208959.0975 }, "end": { "local": "1990-03-11T18:18:28+08:00", "utc": "1990-03-11T10:18:28Z", "ms": 637150708026.2339 } }, "covered_min": 142, "window_min": 142, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 18:04 on Sat 10 Mar to 18:58 on Sun 11 Mar.", "fact": "1990-03-10T10:04:30Z → 1990-03-11T10:58:30Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 15:56–18:18 on the 10th, 15:57–18:18 on the 11th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 13 of 141 minutes on the 10th and 142 of 142 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Both late afternoons qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 796 s" }, { "step": "ruling", "text": "Holikā Dahana, Lu’an, 1990: Sunday 11 March.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "1990-03-11", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-11", "confidence": "boundary" } ], "quote": "In Lu’an, Holikā Dahana 1990 falls on Sunday 11 March. Pūrṇimā runs from 18:04 on Sat 10 Mar to 18:58 on Sun 11 Mar and covers all of sāyāhna that late afternoon. It also reaches the previous late afternoon for 13 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1990/holika-dahana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/holi", "festival": "holi", "name": "Holī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-12", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 796, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-03-10T18:04:30+08:00", "utc": "1990-03-10T10:04:30Z", "ms": 637063469670.9183 }, "end": { "local": "1990-03-11T18:58:30+08:00", "utc": "1990-03-11T10:58:30Z", "ms": 637153109991.6724 }, "month": { "amanta": 11, "purnimanta": 11, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Phālguna" } }, "span": { "of": "tithi", "start": { "local": "1990-03-10T18:04:30+08:00", "utc": "1990-03-10T10:04:30Z", "ms": 637063469670.9183 }, "end": { "local": "1990-03-11T18:58:30+08:00", "utc": "1990-03-11T10:58:30Z", "ms": 637153109991.6724 } }, "kaala": "sayahna", "days": [ { "local_date": "1990-03-10", "window": { "start": { "local": "1990-03-10T15:56:30+08:00", "utc": "1990-03-10T07:56:30Z", "ms": 637055789516.5535 }, "end": { "local": "1990-03-10T18:17:45+08:00", "utc": "1990-03-10T10:17:45Z", "ms": 637064265272.3099 } }, "covered_min": 13, "window_min": 141, "qualifies": true }, { "local_date": "1990-03-11", "window": { "start": { "local": "1990-03-11T15:56:49+08:00", "utc": "1990-03-11T07:56:49Z", "ms": 637142208959.0975 }, "end": { "local": "1990-03-11T18:18:28+08:00", "utc": "1990-03-11T10:18:28Z", "ms": 637150708026.2339 } }, "covered_min": 142, "window_min": 142, "qualifies": true } ], "follows": { "festival": "holika-dahana", "name": "Holikā Dahana", "local_date": "1990-03-11", "days": 1 }, "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 18:04 on Sat 10 Mar to 18:58 on Sun 11 Mar.", "fact": "1990-03-10T10:04:30Z → 1990-03-11T10:58:30Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 15:56–18:18 on the 10th, 15:57–18:18 on the 11th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 13 of 141 minutes on the 10th and 142 of 142 on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Both late afternoons qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 796 s" }, { "step": "counted", "text": "Holī is kept the day after Holikā Dahana: Sunday 11 March is the day taken above.", "fact": "follows: holika-dahana + 1 d" }, { "step": "ruling", "text": "Holī, Lu’an, 1990: Monday 12 March.", "fact": "confidence: boundary (tie-break-unstated)" } ], "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": "1990-03-12", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-12", "confidence": "boundary" } ], "quote": "In Lu’an, Holī 1990 falls on Monday 12 March. It is kept the day after Holikā Dahana, which falls on Sunday 11 March. Pūrṇimā runs from 18:04 on Sat 10 Mar to 18:58 on Sun 11 Mar and covers all of sāyāhna on the 11th. It also reaches the previous late afternoon for 13 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1990/holi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vasantotsava", "festival": "vasantotsava", "name": "Vasantotsava", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36650, "anga": { "type": "tithi", "index": 15, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1990-03-11T18:58:30+08:00", "utc": "1990-03-11T10:58:30Z", "ms": 637153109991.6724 }, "end": { "local": "1990-03-12T20:16:54+08:00", "utc": "1990-03-12T12:16:54Z", "ms": 637244213746.5944 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-11T18:58:30+08:00", "utc": "1990-03-11T10:58:30Z", "ms": 637153109991.6724 }, "end": { "local": "1990-03-12T20:16:54+08:00", "utc": "1990-03-12T12:16:54Z", "ms": 637244213746.5944 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-03-12", "window": { "start": { "local": "1990-03-12T06:28:58+08:00", "utc": "1990-03-11T22:28:58Z", "ms": 637194538493.0422 }, "end": { "local": "1990-03-12T06:28:58+08:00", "utc": "1990-03-11T22:28:58Z", "ms": 637194538493.0422 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-03-13", "window": { "start": { "local": "1990-03-13T06:27:44+08:00", "utc": "1990-03-12T22:27:44Z", "ms": 637280863932.1533 }, "end": { "local": "1990-03-13T06:27:44+08:00", "utc": "1990-03-12T22:27:44Z", "ms": 637280863932.1533 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 18:58 on Sun 11 Mar to 20:17 on Mon 12 Mar.", "fact": "1990-03-11T10:58:30Z → 1990-03-12T12:16:54Z" }, { "step": "kaala", "text": "Sunrise is at 06:29 on the 12th and 06:28 on the 13th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be current at sunrise. It is on the 12th and is not on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 36650 s" }, { "step": "ruling", "text": "Vasantotsava, Lu’an, 1990: Monday 12 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": "1990-03-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-12", "confidence": "determinate" } ], "quote": "In Lu’an, Vasantotsava 1990 falls on Monday 12 March. Pratipadā runs from 18:58 on Sun 11 Mar to 20:17 on Mon 12 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/vasantotsava", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-03-15", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10583, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-03-15T00:02:10+08:00", "utc": "1990-03-14T16:02:10Z", "ms": 637430529931.7213 }, "end": { "local": "1990-03-16T02:22:00+08:00", "utc": "1990-03-15T18:22:00Z", "ms": 637525320493.6432 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-15T00:02:10+08:00", "utc": "1990-03-14T16:02:10Z", "ms": 637430529931.7213 }, "end": { "local": "1990-03-16T02:22:00+08:00", "utc": "1990-03-15T18:22:00Z", "ms": 637525320493.6432 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-03-14", "window": { "start": { "local": "1990-03-14T21:05:47+08:00", "utc": "1990-03-14T13:05:47Z", "ms": 637419946648.154 }, "end": { "local": "1990-03-14T21:05:47+08:00", "utc": "1990-03-14T13:05:47Z", "ms": 637419946648.154 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-03-15", "window": { "start": { "local": "1990-03-15T22:02:37+08:00", "utc": "1990-03-15T14:02:37Z", "ms": 637509757204.396 }, "end": { "local": "1990-03-15T22:02:37+08:00", "utc": "1990-03-15T14:02:37Z", "ms": 637509757204.396 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 00:02 on Thu 15 Mar to 02:22 on Fri 16 Mar.", "fact": "1990-03-14T16:02:10Z → 1990-03-15T18:22:00Z" }, { "step": "kaala", "text": "Moonrise is at 21:06 on the 14th and 22:03 on the 15th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 14th and is on the 15th.", "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 10583 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Thursday 15 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": "1990-03-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-15", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Thursday 15 March. Caturthī runs from 00:02 on Thu 15 Mar to 02:22 on Fri 16 Mar and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-03-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shitalashtami", "festival": "shitalashtami", "name": "Śītalāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2249, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-03-19T09:32:29+08:00", "utc": "1990-03-19T01:32:29Z", "ms": 637810348555.8408 }, "end": { "local": "1990-03-20T11:20:20+08:00", "utc": "1990-03-20T03:20:20Z", "ms": 637903219869.6486 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-19T09:32:29+08:00", "utc": "1990-03-19T01:32:29Z", "ms": 637810348555.8408 }, "end": { "local": "1990-03-20T11:20:20+08:00", "utc": "1990-03-20T03:20:20Z", "ms": 637903219869.6486 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-03-19", "window": { "start": { "local": "1990-03-19T11:58:06+08:00", "utc": "1990-03-19T03:58:06Z", "ms": 637819086452.4907 }, "end": { "local": "1990-03-19T12:46:06+08:00", "utc": "1990-03-19T04:46:06Z", "ms": 637821966452.4907 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-03-20", "window": { "start": { "local": "1990-03-20T11:57:49+08:00", "utc": "1990-03-20T03:57:49Z", "ms": 637905468837.096 }, "end": { "local": "1990-03-20T12:45:49+08:00", "utc": "1990-03-20T04:45:49Z", "ms": 637908348837.096 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 09:32 on Mon 19 Mar to 11:20 on Tue 20 Mar.", "fact": "1990-03-19T01:32:29Z → 1990-03-20T03:20:20Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 19th, 11:58–12:46 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 19th and 0 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 2249 s" }, { "step": "ruling", "text": "Śītalāṣṭamī, Lu’an, 1990: Monday 19 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": "1990-03-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-19", "confidence": "determinate" } ], "quote": "In Lu’an, Śītalāṣṭamī 1990 falls on Monday 19 March. Aṣṭamī runs from 09:32 on Mon 19 Mar to 11:20 on Tue 20 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/shitalashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-03-23", "festival": "ekadashi", "name": "Pāpamocanī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22674, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-03-22T12:56:26+08:00", "utc": "1990-03-22T04:56:26Z", "ms": 638081786081.4366 }, "end": { "local": "1990-03-23T12:32:59+08:00", "utc": "1990-03-23T04:32:59Z", "ms": 638166779114.763 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-22T12:56:26+08:00", "utc": "1990-03-22T04:56:26Z", "ms": 638081786081.4366 }, "end": { "local": "1990-03-23T12:32:59+08:00", "utc": "1990-03-23T04:32:59Z", "ms": 638166779114.763 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-03-22", "window": { "start": { "local": "1990-03-22T06:16:22+08:00", "utc": "1990-03-21T22:16:22Z", "ms": 638057781589.4296 }, "end": { "local": "1990-03-22T06:16:22+08:00", "utc": "1990-03-21T22:16:22Z", "ms": 638057781589.4296 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-03-23", "window": { "start": { "local": "1990-03-23T06:15:05+08:00", "utc": "1990-03-22T22:15:05Z", "ms": 638144105068.0647 }, "end": { "local": "1990-03-23T06:15:05+08:00", "utc": "1990-03-22T22:15:05Z", "ms": 638144105068.0647 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 12:56 on Thu 22 Mar to 12:33 on Fri 23 Mar.", "fact": "1990-03-22T04:56:26Z → 1990-03-23T04:32:59Z" }, { "step": "kaala", "text": "Sunrise is at 06:16 on the 22nd and 06:15 on the 23rd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 22nd and is on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 22674 s" }, { "step": "ruling", "text": "Pāpamocanī Ekādaśī, Lu’an, 1990: Friday 23 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": "1990-03-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-23", "confidence": "determinate" } ], "quote": "In Lu’an, Pāpamocanī Ekādaśī 1990 falls on Friday 23 March. Ekādaśī runs from 12:56 on Thu 22 Mar to 12:33 on Fri 23 Mar and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-03-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-03-24", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25585, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-03-24T11:21:01+08:00", "utc": "1990-03-24T03:21:01Z", "ms": 638248861012.1802 }, "end": { "local": "1990-03-25T09:24:38+08:00", "utc": "1990-03-25T01:24:38Z", "ms": 638328277877.5515 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-24T11:21:01+08:00", "utc": "1990-03-24T03:21:01Z", "ms": 638248861012.1802 }, "end": { "local": "1990-03-25T09:24:38+08:00", "utc": "1990-03-25T01:24:38Z", "ms": 638328277877.5515 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-03-24", "window": { "start": { "local": "1990-03-24T18:27:26+08:00", "utc": "1990-03-24T10:27:26Z", "ms": 638274446170.6808 }, "end": { "local": "1990-03-24T20:01:27+08:00", "utc": "1990-03-24T12:01:27Z", "ms": 638280086941.0326 } }, "covered_min": 94, "window_min": 94, "qualifies": true }, { "local_date": "1990-03-25", "window": { "start": { "local": "1990-03-25T18:28:07+08:00", "utc": "1990-03-25T10:28:07Z", "ms": 638360886660.1852 }, "end": { "local": "1990-03-25T20:01:52+08:00", "utc": "1990-03-25T12:01:52Z", "ms": 638366511825.9869 } }, "covered_min": 0, "window_min": 94, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:21 on Sat 24 Mar to 09:25 on Sun 25 Mar.", "fact": "1990-03-24T03:21:01Z → 1990-03-25T01:24:38Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:27–20:01 on the 24th, 18:28–20:02 on the 25th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 94 of 94 minutes on the 24th and 0 of 94 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25585 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Saturday 24 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": "1990-03-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-24", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Saturday 24 March. Trayodaśī runs from 11:21 on Sat 24 Mar to 09:25 on Sun 25 Mar and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-03-24", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-03-25", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22025, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-03-25T09:24:38+08:00", "utc": "1990-03-25T01:24:38Z", "ms": 638328277877.5515 }, "end": { "local": "1990-03-26T06:50:46+08:00", "utc": "1990-03-25T22:50:46Z", "ms": 638405446250.2479 }, "month": { "amanta": 11, "purnimanta": 0, "adhika": false, "amanta_name": "Phālguna", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-25T09:24:38+08:00", "utc": "1990-03-25T01:24:38Z", "ms": 638328277877.5515 }, "end": { "local": "1990-03-26T06:50:46+08:00", "utc": "1990-03-25T22:50:46Z", "ms": 638405446250.2479 } }, "kaala": "nishita", "days": [ { "local_date": "1990-03-24", "window": { "start": { "local": "1990-03-24T23:55:59+08:00", "utc": "1990-03-24T15:55:59Z", "ms": 638294159059.5002 }, "end": { "local": "1990-03-25T00:43:59+08:00", "utc": "1990-03-24T16:43:59Z", "ms": 638297039059.5002 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-03-25", "window": { "start": { "local": "1990-03-25T23:55:41+08:00", "utc": "1990-03-25T15:55:41Z", "ms": 638380541031.9417 }, "end": { "local": "1990-03-26T00:43:41+08:00", "utc": "1990-03-25T16:43:41Z", "ms": 638383421031.9417 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 09:25 on Sun 25 Mar to 06:51 on Mon 26 Mar.", "fact": "1990-03-25T01:24:38Z → 1990-03-25T22:50:46Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:56–00:44 on the 24th, 23:56–00:44 on the 25th.", "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 24th and 48 of 48 on the 25th.", "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 22025 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Sunday 25 March.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-03-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-25", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Sunday 25 March. Caturdaśī runs from 09:25 on Sun 25 Mar to 06:51 on Mon 26 Mar and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-03-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/navaratra-arambha-caitra", "festival": "navaratra-arambha-caitra", "name": "Navarātrārambha (Caitra)", "everyday": "Chaitra Navratri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29244, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1990-03-27T03:48:19+08:00", "utc": "1990-03-26T19:48:19Z", "ms": 638480899151.0181 }, "end": { "local": "1990-03-28T00:27:18+08:00", "utc": "1990-03-27T16:27:18Z", "ms": 638555238034.6041 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-27T03:48:19+08:00", "utc": "1990-03-26T19:48:19Z", "ms": 638480899151.0181 }, "end": { "local": "1990-03-28T00:27:18+08:00", "utc": "1990-03-27T16:27:18Z", "ms": 638555238034.6041 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-03-27", "window": { "start": { "local": "1990-03-27T11:55:43+08:00", "utc": "1990-03-27T03:55:43Z", "ms": 638510143155.8024 }, "end": { "local": "1990-03-27T12:43:43+08:00", "utc": "1990-03-27T04:43:43Z", "ms": 638513023155.8024 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-03-28", "window": { "start": { "local": "1990-03-28T11:55:25+08:00", "utc": "1990-03-28T03:55:25Z", "ms": 638596525075.6831 }, "end": { "local": "1990-03-28T12:43:25+08:00", "utc": "1990-03-28T04:43:25Z", "ms": 638599405075.6831 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 03:48 on Tue 27 Mar to 00:27 on Wed 28 Mar.", "fact": "1990-03-26T19:48:19Z → 1990-03-27T16:27:18Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:56–12:44 on the 27th, 11:55–12:43 on the 28th.", "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 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 29244 s" }, { "step": "ruling", "text": "Navarātrārambha (Caitra), Lu’an, 1990: Tuesday 27 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": "1990-03-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-27", "confidence": "determinate" } ], "quote": "In Lu’an, Navarātrārambha (Caitra) (Chaitra Navratri) 1990 falls on Tuesday 27 March. Pratipadā runs from 03:48 on Tue 27 Mar to 00:27 on Wed 28 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/navaratra-arambha-caitra", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/gauri-tritiya", "festival": "gauri-tritiya", "name": "Gaurī Tṛtīyā", "everyday": "Gangaur", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17303, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-03-28T20:58:13+08:00", "utc": "1990-03-28T12:58:13Z", "ms": 638629093054.9025 }, "end": { "local": "1990-03-29T17:31:30+08:00", "utc": "1990-03-29T09:31:30Z", "ms": 638703089897.8641 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-28T20:58:13+08:00", "utc": "1990-03-28T12:58:13Z", "ms": 638629093054.9025 }, "end": { "local": "1990-03-29T17:31:30+08:00", "utc": "1990-03-29T09:31:30Z", "ms": 638703089897.8641 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-03-28", "window": { "start": { "local": "1990-03-28T11:55:25+08:00", "utc": "1990-03-28T03:55:25Z", "ms": 638596525075.6831 }, "end": { "local": "1990-03-28T12:43:25+08:00", "utc": "1990-03-28T04:43:25Z", "ms": 638599405075.6831 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-03-29", "window": { "start": { "local": "1990-03-29T11:55:07+08:00", "utc": "1990-03-29T03:55:07Z", "ms": 638682907011.7749 }, "end": { "local": "1990-03-29T12:43:07+08:00", "utc": "1990-03-29T04:43:07Z", "ms": 638685787011.7749 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 20:58 on Wed 28 Mar to 17:31 on Thu 29 Mar.", "fact": "1990-03-28T12:58:13Z → 1990-03-29T09:31:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 28th, 11:55–12:43 on the 29th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 28th and 48 of 48 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 17303 s" }, { "step": "ruling", "text": "Gaurī Tṛtīyā, Lu’an, 1990: Thursday 29 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": "1990-03-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-29", "confidence": "determinate" } ], "quote": "In Lu’an, Gaurī Tṛtīyā (Gangaur) 1990 falls on Thursday 29 March. Tṛtīyā runs from 20:58 on Wed 28 Mar to 17:31 on Thu 29 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/gauri-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/saubhagya-shayana-vrata", "festival": "saubhagya-shayana-vrata", "name": "Saubhāgya Śayana Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17303, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-03-28T20:58:13+08:00", "utc": "1990-03-28T12:58:13Z", "ms": 638629093054.9025 }, "end": { "local": "1990-03-29T17:31:30+08:00", "utc": "1990-03-29T09:31:30Z", "ms": 638703089897.8641 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-28T20:58:13+08:00", "utc": "1990-03-28T12:58:13Z", "ms": 638629093054.9025 }, "end": { "local": "1990-03-29T17:31:30+08:00", "utc": "1990-03-29T09:31:30Z", "ms": 638703089897.8641 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-03-28", "window": { "start": { "local": "1990-03-28T11:55:25+08:00", "utc": "1990-03-28T03:55:25Z", "ms": 638596525075.6831 }, "end": { "local": "1990-03-28T12:43:25+08:00", "utc": "1990-03-28T04:43:25Z", "ms": 638599405075.6831 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-03-29", "window": { "start": { "local": "1990-03-29T11:55:07+08:00", "utc": "1990-03-29T03:55:07Z", "ms": 638682907011.7749 }, "end": { "local": "1990-03-29T12:43:07+08:00", "utc": "1990-03-29T04:43:07Z", "ms": 638685787011.7749 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 20:58 on Wed 28 Mar to 17:31 on Thu 29 Mar.", "fact": "1990-03-28T12:58:13Z → 1990-03-29T09:31:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 28th, 11:55–12:43 on the 29th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 28th and 48 of 48 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 17303 s" }, { "step": "ruling", "text": "Saubhāgya Śayana Vrata, Lu’an, 1990: Thursday 29 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": "1990-03-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-29", "confidence": "determinate" } ], "quote": "In Lu’an, Saubhāgya Śayana Vrata 1990 falls on Thursday 29 March. Tṛtīyā runs from 20:58 on Wed 28 Mar to 17:31 on Thu 29 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/saubhagya-shayana-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-03-30", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5651, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-03-29T17:31:30+08:00", "utc": "1990-03-29T09:31:30Z", "ms": 638703089897.8641 }, "end": { "local": "1990-03-30T14:17:00+08:00", "utc": "1990-03-30T06:17:00Z", "ms": 638777819858.2479 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-29T17:31:30+08:00", "utc": "1990-03-29T09:31:30Z", "ms": 638703089897.8641 }, "end": { "local": "1990-03-30T14:17:00+08:00", "utc": "1990-03-30T06:17:00Z", "ms": 638777819858.2479 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-03-29", "window": { "start": { "local": "1990-03-29T11:55:07+08:00", "utc": "1990-03-29T03:55:07Z", "ms": 638682907011.7749 }, "end": { "local": "1990-03-29T12:43:07+08:00", "utc": "1990-03-29T04:43:07Z", "ms": 638685787011.7749 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-03-30", "window": { "start": { "local": "1990-03-30T11:54:49+08:00", "utc": "1990-03-30T03:54:49Z", "ms": 638769288979.3033 }, "end": { "local": "1990-03-30T12:42:49+08:00", "utc": "1990-03-30T04:42:49Z", "ms": 638772168979.3033 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 17:31 on Thu 29 Mar to 14:17 on Fri 30 Mar.", "fact": "1990-03-29T09:31:30Z → 1990-03-30T06:17:00Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 29th, 11:55–12:43 on the 30th.", "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 29th and 48 of 48 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5651 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Friday 30 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": "1990-03-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-30", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Friday 30 March. Caturthī runs from 17:31 on Thu 29 Mar to 14:17 on Fri 30 Mar and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-03-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/lakshmi-panchami", "festival": "lakshmi-panchami", "name": "Lakṣmī Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-03-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1861, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-03-30T14:17:00+08:00", "utc": "1990-03-30T06:17:00Z", "ms": 638777819858.2479 }, "end": { "local": "1990-03-31T11:23:30+08:00", "utc": "1990-03-31T03:23:30Z", "ms": 638853810294.3043 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-03-30T14:17:00+08:00", "utc": "1990-03-30T06:17:00Z", "ms": 638777819858.2479 }, "end": { "local": "1990-03-31T11:23:30+08:00", "utc": "1990-03-31T03:23:30Z", "ms": 638853810294.3043 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-03-30", "window": { "start": { "local": "1990-03-30T11:54:49+08:00", "utc": "1990-03-30T03:54:49Z", "ms": 638769288979.3033 }, "end": { "local": "1990-03-30T12:42:49+08:00", "utc": "1990-03-30T04:42:49Z", "ms": 638772168979.3033 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-03-31", "window": { "start": { "local": "1990-03-31T11:54:31+08:00", "utc": "1990-03-31T03:54:31Z", "ms": 638855670994.1111 }, "end": { "local": "1990-03-31T12:42:31+08:00", "utc": "1990-03-31T04:42:31Z", "ms": 638858550994.1111 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "second-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 14:17 on Fri 30 Mar to 11:24 on Sat 31 Mar.", "fact": "1990-03-30T06:17:00Z → 1990-03-31T03:23:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:55–12:43 on the 30th, 11:55–12:43 on the 31st.", "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 30th and 0 of 48 on the 31st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Neither midday qualifies. The rule takes the second day.", "fact": "priority: purvaviddha → second-day · margin 1861 s" }, { "step": "ruling", "text": "Lakṣmī Pañcamī, Lu’an, 1990: Saturday 31 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": "1990-03-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-03-31", "confidence": "determinate" } ], "quote": "In Lu’an, Lakṣmī Pañcamī 1990 falls on Saturday 31 March. Pañcamī runs from 14:17 on Fri 30 Mar to 11:24 on Sat 31 Mar, and reaches madhyāhna on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1990/lakshmi-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/bhavani-utpatti", "festival": "bhavani-utpatti", "name": "Bhavānī Utpatti", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17251, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-04-02T07:06:24+08:00", "utc": "1990-04-01T23:06:24Z", "ms": 639011184318.9982 }, "end": { "local": "1990-04-03T05:50:48+08:00", "utc": "1990-04-02T21:50:48Z", "ms": 639093048395.0483 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-04-02T07:06:24+08:00", "utc": "1990-04-01T23:06:24Z", "ms": 639011184318.9982 }, "end": { "local": "1990-04-03T05:50:48+08:00", "utc": "1990-04-02T21:50:48Z", "ms": 639093048395.0483 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-02", "window": { "start": { "local": "1990-04-02T11:53:55+08:00", "utc": "1990-04-02T03:53:55Z", "ms": 639028435233.4388 }, "end": { "local": "1990-04-02T12:41:55+08:00", "utc": "1990-04-02T04:41:55Z", "ms": 639031315233.4388 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-04-03", "window": { "start": { "local": "1990-04-03T11:53:37+08:00", "utc": "1990-04-03T03:53:37Z", "ms": 639114817494.4089 }, "end": { "local": "1990-04-03T12:41:37+08:00", "utc": "1990-04-03T04:41:37Z", "ms": 639117697494.4089 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 07:06 on Mon 2 Apr to 05:51 on Tue 3 Apr.", "fact": "1990-04-01T23:06:24Z → 1990-04-02T21:50:48Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 2nd, 11:54–12:42 on the 3rd.", "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 2nd and 0 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 17251 s" }, { "step": "ruling", "text": "Bhavānī Utpatti, Lu’an, 1990: Monday 2 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": "1990-04-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-02", "confidence": "determinate" } ], "quote": "In Lu’an, Bhavānī Utpatti 1990 falls on Monday 2 April. Aṣṭamī runs from 07:06 on Mon 2 Apr to 05:51 on Tue 3 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/bhavani-utpatti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rama-navami", "festival": "rama-navami", "name": "Rāma Navamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21769, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1990-04-03T05:50:48+08:00", "utc": "1990-04-02T21:50:48Z", "ms": 639093048395.0483 }, "end": { "local": "1990-04-04T05:11:49+08:00", "utc": "1990-04-03T21:11:49Z", "ms": 639177108525.2356 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-04-03T05:50:48+08:00", "utc": "1990-04-02T21:50:48Z", "ms": 639093048395.0483 }, "end": { "local": "1990-04-04T05:11:49+08:00", "utc": "1990-04-03T21:11:49Z", "ms": 639177108525.2356 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-03", "window": { "start": { "local": "1990-04-03T11:53:37+08:00", "utc": "1990-04-03T03:53:37Z", "ms": 639114817494.4089 }, "end": { "local": "1990-04-03T12:41:37+08:00", "utc": "1990-04-03T04:41:37Z", "ms": 639117697494.4089 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-04-04", "window": { "start": { "local": "1990-04-04T11:53:20+08:00", "utc": "1990-04-04T03:53:20Z", "ms": 639201199875.2992 }, "end": { "local": "1990-04-04T12:41:20+08:00", "utc": "1990-04-04T04:41:20Z", "ms": 639204079875.2992 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 05:51 on Tue 3 Apr to 05:12 on Wed 4 Apr.", "fact": "1990-04-02T21:50:48Z → 1990-04-03T21:11:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:54–12:42 on the 3rd, 11:53–12:41 on the 4th.", "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 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: unstated → only-day · margin 21769 s" }, { "step": "ruling", "text": "Rāma Navamī, Lu’an, 1990: Tuesday 3 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": "1990-04-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-03", "confidence": "determinate" } ], "quote": "In Lu’an, Rāma Navamī 1990 falls on Tuesday 3 April. Navamī runs from 05:51 on Tue 3 Apr to 05:12 on Wed 4 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/rama-navami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-04-05", "festival": "ekadashi", "name": "Kāmadā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1357, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-04-05T05:07:35+08:00", "utc": "1990-04-04T21:07:35Z", "ms": 639263255242.428 }, "end": { "local": "1990-04-06T05:34:45+08:00", "utc": "1990-04-05T21:34:45Z", "ms": 639351285302.9832 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-04-05T05:07:35+08:00", "utc": "1990-04-04T21:07:35Z", "ms": 639263255242.428 }, "end": { "local": "1990-04-06T05:34:45+08:00", "utc": "1990-04-05T21:34:45Z", "ms": 639351285302.9832 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-04-05", "window": { "start": { "local": "1990-04-05T05:58:37+08:00", "utc": "1990-04-04T21:58:37Z", "ms": 639266316563.4325 }, "end": { "local": "1990-04-05T05:58:37+08:00", "utc": "1990-04-04T21:58:37Z", "ms": 639266316563.4325 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-04-06", "window": { "start": { "local": "1990-04-06T05:57:22+08:00", "utc": "1990-04-05T21:57:22Z", "ms": 639352641923.804 }, "end": { "local": "1990-04-06T05:57:22+08:00", "utc": "1990-04-05T21:57:22Z", "ms": 639352641923.804 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 05:08 on Thu 5 Apr to 05:35 on Fri 6 Apr.", "fact": "1990-04-04T21:07:35Z → 1990-04-05T21:34:45Z" }, { "step": "kaala", "text": "Sunrise is at 05:59 on the 5th and 05:57 on the 6th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 5th and is not on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 1357 s" }, { "step": "ruling", "text": "Kāmadā Ekādaśī, Lu’an, 1990: Thursday 5 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": "1990-04-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-05", "confidence": "determinate" } ], "quote": "In Lu’an, Kāmadā Ekādaśī 1990 falls on Thursday 5 April. Ekādaśī runs from 05:08 on Thu 5 Apr to 05:35 on Fri 6 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-04-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ananga-trayodashi", "festival": "ananga-trayodashi", "name": "Anaṅga Trayodaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14721, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-04-07T06:29:12+08:00", "utc": "1990-04-06T22:29:12Z", "ms": 639440951533.519 }, "end": { "local": "1990-04-08T07:46:50+08:00", "utc": "1990-04-07T23:46:50Z", "ms": 639532010485.1934 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-04-07T06:29:12+08:00", "utc": "1990-04-06T22:29:12Z", "ms": 639440951533.519 }, "end": { "local": "1990-04-08T07:46:50+08:00", "utc": "1990-04-07T23:46:50Z", "ms": 639532010485.1934 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-07", "window": { "start": { "local": "1990-04-07T11:52:28+08:00", "utc": "1990-04-07T03:52:28Z", "ms": 639460347939.727 }, "end": { "local": "1990-04-07T12:40:28+08:00", "utc": "1990-04-07T04:40:28Z", "ms": 639463227939.727 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-04-08", "window": { "start": { "local": "1990-04-08T11:52:11+08:00", "utc": "1990-04-08T03:52:11Z", "ms": 639546731003.8484 }, "end": { "local": "1990-04-08T12:40:11+08:00", "utc": "1990-04-08T04:40:11Z", "ms": 639549611003.8484 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 06:29 on Sat 7 Apr to 07:47 on Sun 8 Apr.", "fact": "1990-04-06T22:29:12Z → 1990-04-07T23:46:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 7th, 11:52–12:40 on the 8th.", "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 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: purvaviddha → only-day · margin 14721 s" }, { "step": "ruling", "text": "Anaṅga Trayodaśī, Lu’an, 1990: Saturday 7 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": "1990-04-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-07", "confidence": "determinate" } ], "quote": "In Lu’an, Anaṅga Trayodaśī 1990 falls on Saturday 7 April. Trayodaśī runs from 06:29 on Sat 7 Apr to 07:47 on Sun 8 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/ananga-trayodashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-04-07", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37343, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-04-07T06:29:12+08:00", "utc": "1990-04-06T22:29:12Z", "ms": 639440951533.519 }, "end": { "local": "1990-04-08T07:46:50+08:00", "utc": "1990-04-07T23:46:50Z", "ms": 639532010485.1934 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-04-07T06:29:12+08:00", "utc": "1990-04-06T22:29:12Z", "ms": 639440951533.519 }, "end": { "local": "1990-04-08T07:46:50+08:00", "utc": "1990-04-07T23:46:50Z", "ms": 639532010485.1934 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-04-06", "window": { "start": { "local": "1990-04-06T18:36:08+08:00", "utc": "1990-04-06T10:36:08Z", "ms": 639398168231.0109 }, "end": { "local": "1990-04-06T20:06:48+08:00", "utc": "1990-04-06T12:06:48Z", "ms": 639403608150.029 } }, "covered_min": 0, "window_min": 91, "qualifies": false }, { "local_date": "1990-04-07", "window": { "start": { "local": "1990-04-07T18:36:48+08:00", "utc": "1990-04-07T10:36:48Z", "ms": 639484608255.8071 }, "end": { "local": "1990-04-07T20:07:13+08:00", "utc": "1990-04-07T12:07:13Z", "ms": 639490032980.6722 } }, "covered_min": 90, "window_min": 90, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 06:29 on Sat 7 Apr to 07:47 on Sun 8 Apr.", "fact": "1990-04-06T22:29:12Z → 1990-04-07T23:46:50Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:36–20:07 on the 6th, 18:37–20:07 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 91 minutes on the 6th and 90 of 90 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 37343 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Saturday 7 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": "1990-04-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-07", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Saturday 7 April. Trayodaśī runs from 06:29 on Sat 7 Apr to 07:47 on Sun 8 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-04-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vishnu-damanaka-chaturdashi", "festival": "vishnu-damanaka-chaturdashi", "name": "Viṣṇudamanaka Caturdaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8861, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-04-08T07:46:50+08:00", "utc": "1990-04-07T23:46:50Z", "ms": 639532010485.1934 }, "end": { "local": "1990-04-09T09:24:13+08:00", "utc": "1990-04-09T01:24:13Z", "ms": 639624253029.5035 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-04-08T07:46:50+08:00", "utc": "1990-04-07T23:46:50Z", "ms": 639532010485.1934 }, "end": { "local": "1990-04-09T09:24:13+08:00", "utc": "1990-04-09T01:24:13Z", "ms": 639624253029.5035 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-08", "window": { "start": { "local": "1990-04-08T11:52:11+08:00", "utc": "1990-04-08T03:52:11Z", "ms": 639546731003.8484 }, "end": { "local": "1990-04-08T12:40:11+08:00", "utc": "1990-04-08T04:40:11Z", "ms": 639549611003.8484 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-04-09", "window": { "start": { "local": "1990-04-09T11:51:54+08:00", "utc": "1990-04-09T03:51:54Z", "ms": 639633114290.4426 }, "end": { "local": "1990-04-09T12:39:54+08:00", "utc": "1990-04-09T04:39:54Z", "ms": 639635994290.4426 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 07:47 on Sun 8 Apr to 09:24 on Mon 9 Apr.", "fact": "1990-04-07T23:46:50Z → 1990-04-09T01:24:13Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 8th, 11:52–12:40 on the 9th.", "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 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 8861 s" }, { "step": "ruling", "text": "Viṣṇudamanaka Caturdaśī, Lu’an, 1990: Sunday 8 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": "1990-04-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-08", "confidence": "determinate" } ], "quote": "In Lu’an, Viṣṇudamanaka Caturdaśī 1990 falls on Sunday 8 April. Caturdaśī runs from 07:47 on Sun 8 Apr to 09:24 on Mon 9 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vishnu-damanaka-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/chaitri-purnima", "festival": "chaitri-purnima", "name": "Caitrī Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1989, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-04-09T09:24:13+08:00", "utc": "1990-04-09T01:24:13Z", "ms": 639624253029.5035 }, "end": { "local": "1990-04-10T11:18:29+08:00", "utc": "1990-04-10T03:18:29Z", "ms": 639717508680.9949 }, "month": { "amanta": 0, "purnimanta": 0, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Caitra" } }, "span": { "of": "tithi", "start": { "local": "1990-04-09T09:24:13+08:00", "utc": "1990-04-09T01:24:13Z", "ms": 639624253029.5035 }, "end": { "local": "1990-04-10T11:18:29+08:00", "utc": "1990-04-10T03:18:29Z", "ms": 639717508680.9949 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-09", "window": { "start": { "local": "1990-04-09T11:51:54+08:00", "utc": "1990-04-09T03:51:54Z", "ms": 639633114290.4426 }, "end": { "local": "1990-04-09T12:39:54+08:00", "utc": "1990-04-09T04:39:54Z", "ms": 639635994290.4426 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-04-10", "window": { "start": { "local": "1990-04-10T11:51:38+08:00", "utc": "1990-04-10T03:51:38Z", "ms": 639719497819.9894 }, "end": { "local": "1990-04-10T12:39:38+08:00", "utc": "1990-04-10T04:39:38Z", "ms": 639722377819.9894 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 09:24 on Mon 9 Apr to 11:18 on Tue 10 Apr.", "fact": "1990-04-09T01:24:13Z → 1990-04-10T03:18:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 9th, 11:52–12:40 on the 10th.", "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 9th and 0 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 1989 s" }, { "step": "ruling", "text": "Caitrī Pūrṇimā, Lu’an, 1990: Monday 9 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": "1990-04-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-10", "confidence": "determinate" } ], "quote": "In Lu’an, Caitrī Pūrṇimā 1990 falls on Monday 9 April. Pūrṇimā runs from 09:24 on Mon 9 Apr to 11:18 on Tue 10 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/chaitri-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-04-13", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 7380, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-04-13T18:13:37+08:00", "utc": "1990-04-13T10:13:37Z", "ms": 640001616613.9661 }, "end": { "local": "1990-04-14T20:40:52+08:00", "utc": "1990-04-14T12:40:52Z", "ms": 640096851854.654 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-13T18:13:37+08:00", "utc": "1990-04-13T10:13:37Z", "ms": 640001616613.9661 }, "end": { "local": "1990-04-14T20:40:52+08:00", "utc": "1990-04-14T12:40:52Z", "ms": 640096851854.654 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-04-13", "window": { "start": { "local": "1990-04-13T21:48:20+08:00", "utc": "1990-04-13T13:48:20Z", "ms": 640014499906.8761 }, "end": { "local": "1990-04-13T21:48:20+08:00", "utc": "1990-04-13T13:48:20Z", "ms": 640014499906.8761 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-04-14", "window": { "start": { "local": "1990-04-14T22:43:52+08:00", "utc": "1990-04-14T14:43:52Z", "ms": 640104231791.5387 }, "end": { "local": "1990-04-14T22:43:52+08:00", "utc": "1990-04-14T14:43:52Z", "ms": 640104231791.5387 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:14 on Fri 13 Apr to 20:41 on Sat 14 Apr.", "fact": "1990-04-13T10:13:37Z → 1990-04-14T12:40:52Z" }, { "step": "kaala", "text": "Moonrise is at 21:48 on the 13th and 22:44 on the 14th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 13th and is not 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 7380 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Friday 13 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": "1990-04-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-13", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Friday 13 April. Caturthī runs from 18:14 on Fri 13 Apr to 20:41 on Sat 14 Apr and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-04-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vaishakhi", "festival": "vaishakhi", "name": "Vaiśākhī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2354, "anga": { "type": "sankranti", "index": 0, "key": "mesha", "name": "Meṣa", "start": { "local": "1990-04-14T06:26:54+08:00", "utc": "1990-04-13T22:26:54Z", "ms": 640045613915.0239 }, "end": { "local": "1990-05-15T04:19:01+09:00", "utc": "1990-05-14T19:19:01Z", "ms": 642712740813.8347 } }, "span": { "of": "transit", "start": { "local": "1990-04-14T06:26:54+08:00", "utc": "1990-04-13T22:26:54Z", "ms": 640045613915.0239 }, "end": { "local": "1990-04-14T06:26:54+08:00", "utc": "1990-04-13T22:26:54Z", "ms": 640045613915.0239 } }, "kaala": "day", "days": [ { "local_date": "1990-04-13", "window": { "start": { "local": "1990-04-13T05:48:51+08:00", "utc": "1990-04-12T21:48:51Z", "ms": 639956930600.0945 }, "end": { "local": "1990-04-14T05:47:40+08:00", "utc": "1990-04-13T21:47:40Z", "ms": 640043259501.438 } }, "covered_min": 0, "window_min": 1439, "qualifies": false }, { "local_date": "1990-04-14", "window": { "start": { "local": "1990-04-14T05:47:40+08:00", "utc": "1990-04-13T21:47:40Z", "ms": 640043259501.438 }, "end": { "local": "1990-04-15T06:46:29+09:00", "utc": "1990-04-14T21:46:29Z", "ms": 640129588978.193 } }, "covered_min": 1, "window_min": 1439, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "The Sun enters Meṣa at 06:27 on Sat 14 Apr.", "fact": "1990-04-13T22:26:54Z · nirayana, lahiri-iae1985" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 05:49 on the 13th, and from 05:48 on the 14th.", "fact": "day: sunrise-to-sunrise · sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The festival is kept on the day of the transit, the day counted from sunrise. The transit falls on the 14th, not the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 106" }, { "step": "tie_break", "text": "An instant falls in one day and no other. No tie-break is needed.", "fact": "day counted from sunrise → only-day · margin 2354 s" }, { "step": "ruling", "text": "Vaiśākhī, Lu’an, 1990: Saturday 14 April.", "fact": "confidence: determinate" } ], "rule": { "kind": "solar", "id": "vaishakhi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Mesadi — Cadaka puja (Bengal), Bahag Bihu (Assam), Cheiraoba (Manipur), Visu (T. C. State), Vaisakhi (on the samkramana day commencing from sunrise)." }, { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 106", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The following festivals are observed according to the day of Sun's transit into rasis (Ravi-samkramana). For this purpose the day has been taken to begin from midnight, i.e., when the samkramana takes place after midnight, the festival relating to the samkramana is to be observed on the following day." } ], "not_evaluated": "The other names in the row (Cadaka puja, Bahag Bihu, Cheiraoba, Visu) are regional observances and wait with the regional rows.", "rashi": "Meṣa", "day_from": "sunrise" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-04-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-14", "confidence": "determinate" }, { "kind": "reckoning", "id": "civil-day", "local_date": "1990-04-14", "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": "1990-04-14", "statement": "Past sunset, the next day (the Tamil rule)", "reference": { "text": "Calendar Reform Committee 1955, Rules of Samkranti", "locator": "p. 244", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The Tamil rule: In the Tamil districts the rule is that when a samkranti takes place before sunset, the month begins on the same day, while if it takes place after sunset the month begins on the following day." } } ], "quote": "In Lu’an, Vaiśākhī 1990 falls on Saturday 14 April. The Sun enters Meṣa at 06:27 on Sat 14 Apr, and the rule counts the day from sunrise.", "cite": "https://ahargana.org/lu-an/festivals/1990/vaishakhi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-04-21", "festival": "ekadashi", "name": "Varūthinī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10729, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-04-21T03:40:50+09:00", "utc": "1990-04-20T18:40:50Z", "ms": 640636850121.4568 }, "end": { "local": "1990-04-22T02:04:46+09:00", "utc": "1990-04-21T17:04:46Z", "ms": 640717485824.835 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-21T03:40:50+09:00", "utc": "1990-04-20T18:40:50Z", "ms": 640636850121.4568 }, "end": { "local": "1990-04-22T02:04:46+09:00", "utc": "1990-04-21T17:04:46Z", "ms": 640717485824.835 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-04-21", "window": { "start": { "local": "1990-04-21T06:39:40+09:00", "utc": "1990-04-20T21:39:40Z", "ms": 640647579550.1543 }, "end": { "local": "1990-04-21T06:39:40+09:00", "utc": "1990-04-20T21:39:40Z", "ms": 640647579550.1543 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-04-22", "window": { "start": { "local": "1990-04-22T06:38:34+09:00", "utc": "1990-04-21T21:38:34Z", "ms": 640733913861.8567 }, "end": { "local": "1990-04-22T06:38:34+09:00", "utc": "1990-04-21T21:38:34Z", "ms": 640733913861.8567 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 03:41 on Sat 21 Apr to 02:05 on Sun 22 Apr.", "fact": "1990-04-20T18:40:50Z → 1990-04-21T17:04:46Z" }, { "step": "kaala", "text": "Sunrise is at 06:40 on the 21st and 06:39 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 10729 s" }, { "step": "ruling", "text": "Varūthinī Ekādaśī, Lu’an, 1990: Saturday 21 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": "1990-04-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-21", "confidence": "determinate" } ], "quote": "In Lu’an, Varūthinī Ekādaśī 1990 falls on Saturday 21 April. Ekādaśī runs from 03:41 on Sat 21 Apr to 02:05 on Sun 22 Apr and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-04-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-04-23", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1861, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-04-22T23:43:06+09:00", "utc": "1990-04-22T14:43:06Z", "ms": 640795385884.5448 }, "end": { "local": "1990-04-23T20:43:09+09:00", "utc": "1990-04-23T11:43:09Z", "ms": 640870988954.0138 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-22T23:43:06+09:00", "utc": "1990-04-22T14:43:06Z", "ms": 640795385884.5448 }, "end": { "local": "1990-04-23T20:43:09+09:00", "utc": "1990-04-23T11:43:09Z", "ms": 640870988954.0138 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-04-22", "window": { "start": { "local": "1990-04-22T19:46:58+09:00", "utc": "1990-04-22T10:46:58Z", "ms": 640781218048.166 }, "end": { "local": "1990-04-22T21:13:42+09:00", "utc": "1990-04-22T12:13:42Z", "ms": 640786422171.5804 } }, "covered_min": 0, "window_min": 87, "qualifies": false }, { "local_date": "1990-04-23", "window": { "start": { "local": "1990-04-23T19:47:40+09:00", "utc": "1990-04-23T10:47:40Z", "ms": 640867659571.6104 }, "end": { "local": "1990-04-23T21:14:10+09:00", "utc": "1990-04-23T12:14:10Z", "ms": 640872849616.767 } }, "covered_min": 55, "window_min": 87, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 23:43 on Sun 22 Apr to 20:43 on Mon 23 Apr.", "fact": "1990-04-22T14:43:06Z → 1990-04-23T11:43:09Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:47–21:14 on the 22nd, 19:48–21:14 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 87 minutes on the 22nd and 55 of 87 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 1861 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Monday 23 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": "1990-04-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-23", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Monday 23 April. Trayodaśī runs from 23:43 on Sun 22 Apr to 20:43 on Mon 23 Apr and covers 55 of 87 minutes of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-04-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-04-23", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14693, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-04-23T20:43:09+09:00", "utc": "1990-04-23T11:43:09Z", "ms": 640870988954.0138 }, "end": { "local": "1990-04-24T17:14:21+09:00", "utc": "1990-04-24T08:14:21Z", "ms": 640944861025.9421 }, "month": { "amanta": 0, "purnimanta": 1, "adhika": false, "amanta_name": "Caitra", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-23T20:43:09+09:00", "utc": "1990-04-23T11:43:09Z", "ms": 640870988954.0138 }, "end": { "local": "1990-04-24T17:14:21+09:00", "utc": "1990-04-24T08:14:21Z", "ms": 640944861025.9421 } }, "kaala": "nishita", "days": [ { "local_date": "1990-04-23", "window": { "start": { "local": "1990-04-24T00:48:02+09:00", "utc": "1990-04-23T15:48:02Z", "ms": 640885682240.9475 }, "end": { "local": "1990-04-24T01:36:02+09:00", "utc": "1990-04-23T16:36:02Z", "ms": 640888562240.9475 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-04-24", "window": { "start": { "local": "1990-04-25T00:47:51+09:00", "utc": "1990-04-24T15:47:51Z", "ms": 640972071446.4833 }, "end": { "local": "1990-04-25T01:35:51+09:00", "utc": "1990-04-24T16:35:51Z", "ms": 640974951446.4833 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 20:43 on Mon 23 Apr to 17:14 on Tue 24 Apr.", "fact": "1990-04-23T11:43:09Z → 1990-04-24T08:14:21Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:48–01:36 on the 23rd, 00:48–01:36 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 14693 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Monday 23 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": "1990-04-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-23", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Monday 23 April. Caturdaśī runs from 20:43 on Mon 23 Apr to 17:14 on Tue 24 Apr and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-04-23", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/akshaya-tritiya", "festival": "akshaya-tritiya", "name": "Akṣaya Tṛtīyā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2895, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-04-27T05:45:03+09:00", "utc": "1990-04-26T20:45:03Z", "ms": 641162702800.1919 }, "end": { "local": "1990-04-28T02:12:06+09:00", "utc": "1990-04-27T17:12:06Z", "ms": 641236325829.1616 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-27T05:45:03+09:00", "utc": "1990-04-26T20:45:03Z", "ms": 641162702800.1919 }, "end": { "local": "1990-04-28T02:12:06+09:00", "utc": "1990-04-27T17:12:06Z", "ms": 641236325829.1616 } }, "kaala": "purvahna", "days": [ { "local_date": "1990-04-27", "window": { "start": { "local": "1990-04-27T06:33:18+09:00", "utc": "1990-04-26T21:33:18Z", "ms": 641165597891.5543 }, "end": { "local": "1990-04-27T10:59:01+09:00", "utc": "1990-04-27T01:59:01Z", "ms": 641181540795.761 } }, "covered_min": 266, "window_min": 266, "qualifies": true }, { "local_date": "1990-04-28", "window": { "start": { "local": "1990-04-28T06:32:17+09:00", "utc": "1990-04-27T21:32:17Z", "ms": 641251937347.104 }, "end": { "local": "1990-04-28T10:58:34+09:00", "utc": "1990-04-28T01:58:34Z", "ms": 641267914412.1577 } }, "covered_min": 0, "window_min": 266, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 05:45 on Fri 27 Apr to 02:12 on Sat 28 Apr.", "fact": "1990-04-26T20:45:03Z → 1990-04-27T17:12:06Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:33–10:59 on the 27th, 06:32–10:59 on the 28th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pūrvāhṇa. It covers 266 of 266 minutes on the 27th and 0 of 266 on the 28th.", "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 2895 s" }, { "step": "ruling", "text": "Akṣaya Tṛtīyā, Lu’an, 1990: Friday 27 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": "1990-04-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-27", "confidence": "determinate" } ], "quote": "In Lu’an, Akṣaya Tṛtīyā 1990 falls on Friday 27 April. Tṛtīyā runs from 05:45 on Fri 27 Apr to 02:12 on Sat 28 Apr and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/lu-an/festivals/1990/akshaya-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/parashurama-jayanti", "festival": "parashurama-jayanti", "name": "Paraśurāma Jayantī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17764, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-04-27T05:45:03+09:00", "utc": "1990-04-26T20:45:03Z", "ms": 641162702800.1919 }, "end": { "local": "1990-04-28T02:12:06+09:00", "utc": "1990-04-27T17:12:06Z", "ms": 641236325829.1616 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-27T05:45:03+09:00", "utc": "1990-04-26T20:45:03Z", "ms": 641162702800.1919 }, "end": { "local": "1990-04-28T02:12:06+09:00", "utc": "1990-04-27T17:12:06Z", "ms": 641236325829.1616 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-04-26", "window": { "start": { "local": "1990-04-26T19:49:45+09:00", "utc": "1990-04-26T10:49:45Z", "ms": 641126984726.0955 }, "end": { "local": "1990-04-26T21:15:33+09:00", "utc": "1990-04-26T12:15:33Z", "ms": 641132133148.1566 } }, "covered_min": 0, "window_min": 86, "qualifies": false }, { "local_date": "1990-04-27", "window": { "start": { "local": "1990-04-27T19:50:27+09:00", "utc": "1990-04-27T10:50:27Z", "ms": 641213426604.1742 }, "end": { "local": "1990-04-27T21:16:01+09:00", "utc": "1990-04-27T12:16:01Z", "ms": 641218561369.8982 } }, "covered_min": 86, "window_min": 86, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 05:45 on Fri 27 Apr to 02:12 on Sat 28 Apr.", "fact": "1990-04-26T20:45:03Z → 1990-04-27T17:12:06Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:50–21:16 on the 26th, 19:50–21:16 on the 27th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during pradoṣa. It covers 0 of 86 minutes on the 26th and 86 of 86 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 17764 s" }, { "step": "ruling", "text": "Paraśurāma Jayantī, Lu’an, 1990: Friday 27 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": "1990-04-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-27", "confidence": "determinate" } ], "quote": "In Lu’an, Paraśurāma Jayantī 1990 falls on Friday 27 April. Tṛtīyā runs from 05:45 on Fri 27 Apr to 02:12 on Sat 28 Apr and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/parashurama-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-04-28", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34165, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-04-28T02:12:06+09:00", "utc": "1990-04-27T17:12:06Z", "ms": 641236325829.1616 }, "end": { "local": "1990-04-28T23:05:08+09:00", "utc": "1990-04-28T14:05:08Z", "ms": 641311507692.3081 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-28T02:12:06+09:00", "utc": "1990-04-27T17:12:06Z", "ms": 641236325829.1616 }, "end": { "local": "1990-04-28T23:05:08+09:00", "utc": "1990-04-28T14:05:08Z", "ms": 641311507692.3081 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-27", "window": { "start": { "local": "1990-04-27T12:47:52+09:00", "utc": "1990-04-27T03:47:52Z", "ms": 641188072247.8643 }, "end": { "local": "1990-04-27T13:35:52+09:00", "utc": "1990-04-27T04:35:52Z", "ms": 641190952247.8643 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-04-28", "window": { "start": { "local": "1990-04-28T12:47:43+09:00", "utc": "1990-04-28T03:47:43Z", "ms": 641274462944.6846 }, "end": { "local": "1990-04-28T13:35:43+09:00", "utc": "1990-04-28T04:35:43Z", "ms": 641277342944.6846 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 02:12 on Sat 28 Apr to 23:05 on Sat 28 Apr.", "fact": "1990-04-27T17:12:06Z → 1990-04-28T14:05:08Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:48–13:36 on the 27th, 12:48–13:36 on the 28th.", "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 27th and 48 of 48 on the 28th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 34165 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Saturday 28 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": "1990-04-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-28", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Saturday 28 April. Caturthī runs from 02:12 on Sat 28 Apr to 23:05 on Sat 28 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-04-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shankara-jayanti", "festival": "shankara-jayanti", "name": "Śaṅkara Jayantī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-04-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25029, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-04-28T23:05:08+09:00", "utc": "1990-04-28T14:05:08Z", "ms": 641311507692.3081 }, "end": { "local": "1990-04-29T20:32:43+09:00", "utc": "1990-04-29T11:32:43Z", "ms": 641388763036.669 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-28T23:05:08+09:00", "utc": "1990-04-28T14:05:08Z", "ms": 641311507692.3081 }, "end": { "local": "1990-04-29T20:32:43+09:00", "utc": "1990-04-29T11:32:43Z", "ms": 641388763036.669 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-28", "window": { "start": { "local": "1990-04-28T12:47:43+09:00", "utc": "1990-04-28T03:47:43Z", "ms": 641274462944.6846 }, "end": { "local": "1990-04-28T13:35:43+09:00", "utc": "1990-04-28T04:35:43Z", "ms": 641277342944.6846 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-04-29", "window": { "start": { "local": "1990-04-29T12:47:34+09:00", "utc": "1990-04-29T03:47:34Z", "ms": 641360854132.1758 }, "end": { "local": "1990-04-29T13:35:34+09:00", "utc": "1990-04-29T04:35:34Z", "ms": 641363734132.1758 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 23:05 on Sat 28 Apr to 20:33 on Sun 29 Apr.", "fact": "1990-04-28T14:05:08Z → 1990-04-29T11:32:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:48–13:36 on the 28th, 12:48–13:36 on the 29th.", "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 28th and 48 of 48 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25029 s" }, { "step": "ruling", "text": "Śaṅkara Jayantī, Lu’an, 1990: Sunday 29 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": "1990-04-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-04-29", "confidence": "determinate" } ], "quote": "In Lu’an, Śaṅkara Jayantī 1990 falls on Sunday 29 April. Pañcamī runs from 23:05 on Sat 28 Apr to 20:33 on Sun 29 Apr and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/shankara-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/gangotpatti", "festival": "gangotpatti", "name": "Gaṅgotpatti", "everyday": "Ganga Saptami", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14342, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1990-04-30T18:41:15+09:00", "utc": "1990-04-30T09:41:15Z", "ms": 641468475090.5773 }, "end": { "local": "1990-05-01T17:34:20+09:00", "utc": "1990-05-01T08:34:20Z", "ms": 641550859503.438 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-04-30T18:41:15+09:00", "utc": "1990-04-30T09:41:15Z", "ms": 641468475090.5773 }, "end": { "local": "1990-05-01T17:34:20+09:00", "utc": "1990-05-01T08:34:20Z", "ms": 641550859503.438 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-04-30", "window": { "start": { "local": "1990-04-30T12:47:26+09:00", "utc": "1990-04-30T03:47:26Z", "ms": 641447245815.8574 }, "end": { "local": "1990-04-30T13:35:26+09:00", "utc": "1990-04-30T04:35:26Z", "ms": 641450125815.8574 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-05-01", "window": { "start": { "local": "1990-05-01T12:47:18+09:00", "utc": "1990-05-01T03:47:18Z", "ms": 641533638001.9507 }, "end": { "local": "1990-05-01T13:35:18+09:00", "utc": "1990-05-01T04:35:18Z", "ms": 641536518001.9507 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 18:41 on Mon 30 Apr to 17:34 on Tue 1 May.", "fact": "1990-04-30T09:41:15Z → 1990-05-01T08:34:20Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 30th, 12:47–13:35 on the 1st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 30th 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: purvaviddha → only-day · margin 14342 s" }, { "step": "ruling", "text": "Gaṅgotpatti, Lu’an, 1990: Tuesday 1 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "gangotpatti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 102", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Gangotpatti, (madhyahna vyapini, if occurs on two successive days, the first day is to be observed), Jahnu saptami, Sarkara saptami." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-05-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-01", "confidence": "determinate" } ], "quote": "In Lu’an, Gaṅgotpatti (Ganga Saptami) 1990 falls on Tuesday 1 May. Saptamī runs from 18:41 on Mon 30 Apr to 17:34 on Tue 1 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/gangotpatti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-05-05", "festival": "ekadashi", "name": "Mohinī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37677, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-05-04T18:29:45+09:00", "utc": "1990-05-04T09:29:45Z", "ms": 641813384504.4633 }, "end": { "local": "1990-05-05T19:56:52+09:00", "utc": "1990-05-05T10:56:52Z", "ms": 641905011823.0885 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-04T18:29:45+09:00", "utc": "1990-05-04T09:29:45Z", "ms": 641813384504.4633 }, "end": { "local": "1990-05-05T19:56:52+09:00", "utc": "1990-05-05T10:56:52Z", "ms": 641905011823.0885 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-05-05", "window": { "start": { "local": "1990-05-05T06:25:41+09:00", "utc": "1990-05-04T21:25:41Z", "ms": 641856340981.697 }, "end": { "local": "1990-05-05T06:25:41+09:00", "utc": "1990-05-04T21:25:41Z", "ms": 641856340981.697 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-05-06", "window": { "start": { "local": "1990-05-06T06:24:49+09:00", "utc": "1990-05-05T21:24:49Z", "ms": 641942688567.6665 }, "end": { "local": "1990-05-06T06:24:49+09:00", "utc": "1990-05-05T21:24:49Z", "ms": 641942688567.6665 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 18:30 on Fri 4 May to 19:57 on Sat 5 May.", "fact": "1990-05-04T09:29:45Z → 1990-05-05T10:56:52Z" }, { "step": "kaala", "text": "Sunrise is at 06:26 on the 5th and 06:25 on the 6th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 5th and is not on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 37677 s" }, { "step": "ruling", "text": "Mohinī Ekādaśī, Lu’an, 1990: Saturday 5 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": "1990-05-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-05", "confidence": "determinate" } ], "quote": "In Lu’an, Mohinī Ekādaśī 1990 falls on Saturday 5 May. Ekādaśī runs from 18:30 on Fri 4 May to 19:57 on Sat 5 May and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-05-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/parashurama-dvadashi", "festival": "parashurama-dvadashi", "name": "Paraśurāma Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22920, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-05-05T19:56:52+09:00", "utc": "1990-05-05T10:56:52Z", "ms": 641905011823.0885 }, "end": { "local": "1990-05-06T21:46:40+09:00", "utc": "1990-05-06T12:46:40Z", "ms": 641997999913.7898 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-05T19:56:52+09:00", "utc": "1990-05-05T10:56:52Z", "ms": 641905011823.0885 }, "end": { "local": "1990-05-06T21:46:40+09:00", "utc": "1990-05-06T12:46:40Z", "ms": 641997999913.7898 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-05", "window": { "start": { "local": "1990-05-05T12:46:52+09:00", "utc": "1990-05-05T03:46:52Z", "ms": 641879211912.1641 }, "end": { "local": "1990-05-05T13:34:52+09:00", "utc": "1990-05-05T04:34:52Z", "ms": 641882091912.1641 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-05-06", "window": { "start": { "local": "1990-05-06T12:46:47+09:00", "utc": "1990-05-06T03:46:47Z", "ms": 641965606717.7799 }, "end": { "local": "1990-05-06T13:34:47+09:00", "utc": "1990-05-06T04:34:47Z", "ms": 641968486717.7799 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 19:57 on Sat 5 May to 21:47 on Sun 6 May.", "fact": "1990-05-05T10:56:52Z → 1990-05-06T12:46:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 5th, 12:47–13:35 on the 6th.", "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 5th and 48 of 48 on the 6th.", "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 22920 s" }, { "step": "ruling", "text": "Paraśurāma Dvādaśī, Lu’an, 1990: Sunday 6 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": "1990-05-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-06", "confidence": "determinate" } ], "quote": "In Lu’an, Paraśurāma Dvādaśī 1990 falls on Sunday 6 May. Dvādaśī runs from 19:57 on Sat 5 May to 21:47 on Sun 6 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/parashurama-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rukmini-dvadashi", "festival": "rukmini-dvadashi", "name": "Rukmiṇī Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22920, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-05-05T19:56:52+09:00", "utc": "1990-05-05T10:56:52Z", "ms": 641905011823.0885 }, "end": { "local": "1990-05-06T21:46:40+09:00", "utc": "1990-05-06T12:46:40Z", "ms": 641997999913.7898 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-05T19:56:52+09:00", "utc": "1990-05-05T10:56:52Z", "ms": 641905011823.0885 }, "end": { "local": "1990-05-06T21:46:40+09:00", "utc": "1990-05-06T12:46:40Z", "ms": 641997999913.7898 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-05", "window": { "start": { "local": "1990-05-05T12:46:52+09:00", "utc": "1990-05-05T03:46:52Z", "ms": 641879211912.1641 }, "end": { "local": "1990-05-05T13:34:52+09:00", "utc": "1990-05-05T04:34:52Z", "ms": 641882091912.1641 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-05-06", "window": { "start": { "local": "1990-05-06T12:46:47+09:00", "utc": "1990-05-06T03:46:47Z", "ms": 641965606717.7799 }, "end": { "local": "1990-05-06T13:34:47+09:00", "utc": "1990-05-06T04:34:47Z", "ms": 641968486717.7799 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 19:57 on Sat 5 May to 21:47 on Sun 6 May.", "fact": "1990-05-05T10:56:52Z → 1990-05-06T12:46:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 5th, 12:47–13:35 on the 6th.", "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 5th and 48 of 48 on the 6th.", "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 22920 s" }, { "step": "ruling", "text": "Rukmiṇī Dvādaśī, Lu’an, 1990: Sunday 6 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": "1990-05-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-06", "confidence": "determinate" } ], "quote": "In Lu’an, Rukmiṇī Dvādaśī 1990 falls on Sunday 6 May. Dvādaśī runs from 19:57 on Sat 5 May to 21:47 on Sun 6 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/rukmini-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-05-07", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1577, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-05-06T21:46:40+09:00", "utc": "1990-05-06T12:46:40Z", "ms": 641997999913.7898 }, "end": { "local": "1990-05-07T23:52:27+09:00", "utc": "1990-05-07T14:52:27Z", "ms": 642091947023.0758 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-06T21:46:40+09:00", "utc": "1990-05-06T12:46:40Z", "ms": 641997999913.7898 }, "end": { "local": "1990-05-07T23:52:27+09:00", "utc": "1990-05-07T14:52:27Z", "ms": 642091947023.0758 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-05-06", "window": { "start": { "local": "1990-05-06T19:56:45+09:00", "utc": "1990-05-06T10:56:45Z", "ms": 641991404867.8933 }, "end": { "local": "1990-05-06T21:20:23+09:00", "utc": "1990-05-06T12:20:23Z", "ms": 641996422522.7596 } }, "covered_min": 0, "window_min": 84, "qualifies": false }, { "local_date": "1990-05-07", "window": { "start": { "local": "1990-05-07T19:57:27+09:00", "utc": "1990-05-07T10:57:27Z", "ms": 642077846857.7236 }, "end": { "local": "1990-05-07T21:20:52+09:00", "utc": "1990-05-07T12:20:52Z", "ms": 642082852228.8413 } }, "covered_min": 83, "window_min": 83, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 21:47 on Sun 6 May to 23:52 on Mon 7 May.", "fact": "1990-05-06T12:46:40Z → 1990-05-07T14:52:27Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:57–21:20 on the 6th, 19:57–21:21 on the 7th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 84 minutes on the 6th and 83 of 83 on the 7th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1577 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Monday 7 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-05-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-07", "confidence": "boundary" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Monday 7 May. Trayodaśī runs from 21:47 on Sun 6 May to 23:52 on Mon 7 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-05-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/nrisimha-chaturdashi", "festival": "nrisimha-chaturdashi", "name": "Nṛsiṃha Caturdaśī", "everyday": "Narasimha Jayanti", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9095, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-05-07T23:52:27+09:00", "utc": "1990-05-07T14:52:27Z", "ms": 642091947023.0758 }, "end": { "local": "1990-05-09T02:08:39+09:00", "utc": "1990-05-08T17:08:39Z", "ms": 642186518980.7906 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-07T23:52:27+09:00", "utc": "1990-05-07T14:52:27Z", "ms": 642091947023.0758 }, "end": { "local": "1990-05-09T02:08:39+09:00", "utc": "1990-05-08T17:08:39Z", "ms": 642186518980.7906 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-05-07", "window": { "start": { "local": "1990-05-07T19:57:27+09:00", "utc": "1990-05-07T10:57:27Z", "ms": 642077846857.7236 }, "end": { "local": "1990-05-07T21:20:52+09:00", "utc": "1990-05-07T12:20:52Z", "ms": 642082852228.8413 } }, "covered_min": 0, "window_min": 83, "qualifies": false }, { "local_date": "1990-05-08", "window": { "start": { "local": "1990-05-08T19:58:09+09:00", "utc": "1990-05-08T10:58:09Z", "ms": 642164288800.4713 }, "end": { "local": "1990-05-08T21:21:22+09:00", "utc": "1990-05-08T12:21:22Z", "ms": 642169282050.6534 } }, "covered_min": 83, "window_min": 83, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 23:52 on Mon 7 May to 02:09 on Wed 9 May.", "fact": "1990-05-07T14:52:27Z → 1990-05-08T17:08:39Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:57–21:21 on the 7th, 19:58–21:21 on the 8th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 0 of 83 minutes on the 7th and 83 of 83 on the 8th.", "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 9095 s" }, { "step": "ruling", "text": "Nṛsiṃha Caturdaśī, Lu’an, 1990: Tuesday 8 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": "1990-05-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-08", "confidence": "determinate" } ], "quote": "In Lu’an, Nṛsiṃha Caturdaśī (Narasimha Jayanti) 1990 falls on Tuesday 8 May. Caturdaśī runs from 23:52 on Mon 7 May to 02:09 on Wed 9 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/nrisimha-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/buddha-purnima", "festival": "buddha-purnima", "name": "Buddha Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29746, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-05-09T02:08:39+09:00", "utc": "1990-05-08T17:08:39Z", "ms": 642186518980.7906 }, "end": { "local": "1990-05-10T04:30:46+09:00", "utc": "1990-05-09T19:30:46Z", "ms": 642281445849.8448 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-09T02:08:39+09:00", "utc": "1990-05-08T17:08:39Z", "ms": 642186518980.7906 }, "end": { "local": "1990-05-10T04:30:46+09:00", "utc": "1990-05-09T19:30:46Z", "ms": 642281445849.8448 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-09", "window": { "start": { "local": "1990-05-09T12:46:34+09:00", "utc": "1990-05-09T03:46:34Z", "ms": 642224794430.2273 }, "end": { "local": "1990-05-09T13:34:34+09:00", "utc": "1990-05-09T04:34:34Z", "ms": 642227674430.2273 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-05-10", "window": { "start": { "local": "1990-05-10T12:46:31+09:00", "utc": "1990-05-10T03:46:31Z", "ms": 642311191452.0143 }, "end": { "local": "1990-05-10T13:34:31+09:00", "utc": "1990-05-10T04:34:31Z", "ms": 642314071452.0143 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:09 on Wed 9 May to 04:31 on Thu 10 May.", "fact": "1990-05-08T17:08:39Z → 1990-05-09T19:30:46Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 9th, 12:47–13:35 on the 10th.", "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 9th and 0 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 29746 s" }, { "step": "ruling", "text": "Buddha Pūrṇimā, Lu’an, 1990: Wednesday 9 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": "1990-05-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-09", "confidence": "determinate" } ], "quote": "In Lu’an, Buddha Pūrṇimā 1990 falls on Wednesday 9 May. Pūrṇimā runs from 02:09 on Wed 9 May to 04:31 on Thu 10 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/buddha-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sampat-gauri-vrata", "festival": "sampat-gauri-vrata", "name": "Sampat Gaurī Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29746, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-05-09T02:08:39+09:00", "utc": "1990-05-08T17:08:39Z", "ms": 642186518980.7906 }, "end": { "local": "1990-05-10T04:30:46+09:00", "utc": "1990-05-09T19:30:46Z", "ms": 642281445849.8448 }, "month": { "amanta": 1, "purnimanta": 1, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Vaiśākha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-09T02:08:39+09:00", "utc": "1990-05-08T17:08:39Z", "ms": 642186518980.7906 }, "end": { "local": "1990-05-10T04:30:46+09:00", "utc": "1990-05-09T19:30:46Z", "ms": 642281445849.8448 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-09", "window": { "start": { "local": "1990-05-09T12:46:34+09:00", "utc": "1990-05-09T03:46:34Z", "ms": 642224794430.2273 }, "end": { "local": "1990-05-09T13:34:34+09:00", "utc": "1990-05-09T04:34:34Z", "ms": 642227674430.2273 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-05-10", "window": { "start": { "local": "1990-05-10T12:46:31+09:00", "utc": "1990-05-10T03:46:31Z", "ms": 642311191452.0143 }, "end": { "local": "1990-05-10T13:34:31+09:00", "utc": "1990-05-10T04:34:31Z", "ms": 642314071452.0143 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 02:09 on Wed 9 May to 04:31 on Thu 10 May.", "fact": "1990-05-08T17:08:39Z → 1990-05-09T19:30:46Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 9th, 12:47–13:35 on the 10th.", "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 9th and 0 of 48 on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 29746 s" }, { "step": "ruling", "text": "Sampat Gaurī Vrata, Lu’an, 1990: Wednesday 9 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": "1990-05-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-09", "confidence": "determinate" } ], "quote": "In Lu’an, Sampat Gaurī Vrata 1990 falls on Wednesday 9 May. Pūrṇimā runs from 02:09 on Wed 9 May to 04:31 on Thu 10 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/sampat-gauri-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-05-13", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38061, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-05-13T11:30:59+09:00", "utc": "1990-05-13T02:30:59Z", "ms": 642565859361.6556 }, "end": { "local": "1990-05-14T13:31:15+09:00", "utc": "1990-05-14T04:31:15Z", "ms": 642659474520.3174 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-13T11:30:59+09:00", "utc": "1990-05-13T02:30:59Z", "ms": 642565859361.6556 }, "end": { "local": "1990-05-14T13:31:15+09:00", "utc": "1990-05-14T04:31:15Z", "ms": 642659474520.3174 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-05-13", "window": { "start": { "local": "1990-05-13T23:21:02+09:00", "utc": "1990-05-13T14:21:02Z", "ms": 642608462156.4811 }, "end": { "local": "1990-05-13T23:21:02+09:00", "utc": "1990-05-13T14:21:02Z", "ms": 642608462156.4811 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-05-14", "window": { "start": { "local": "1990-05-15T00:05:36+09:00", "utc": "1990-05-14T15:05:36Z", "ms": 642697535764.4043 }, "end": { "local": "1990-05-15T00:05:36+09:00", "utc": "1990-05-14T15:05:36Z", "ms": 642697535764.4043 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 11:31 on Sun 13 May to 13:31 on Mon 14 May.", "fact": "1990-05-13T02:30:59Z → 1990-05-14T04:31:15Z" }, { "step": "kaala", "text": "Moonrise is at 23:21 on the 13th and 00:06 on the 14th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 13th and is not 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 38061 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Sunday 13 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": "1990-05-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-13", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Sunday 13 May. Caturthī runs from 11:31 on Sun 13 May to 13:31 on Mon 14 May and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-05-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-05-21", "festival": "ekadashi", "name": "Aparā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17812, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-05-20T13:41:42+09:00", "utc": "1990-05-20T04:41:42Z", "ms": 643178502104.7153 }, "end": { "local": "1990-05-21T11:11:02+09:00", "utc": "1990-05-21T02:11:02Z", "ms": 643255862248.6666 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-20T13:41:42+09:00", "utc": "1990-05-20T04:41:42Z", "ms": 643178502104.7153 }, "end": { "local": "1990-05-21T11:11:02+09:00", "utc": "1990-05-21T02:11:02Z", "ms": 643255862248.6666 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-05-20", "window": { "start": { "local": "1990-05-20T06:14:44+09:00", "utc": "1990-05-19T21:14:44Z", "ms": 643151683555.5038 }, "end": { "local": "1990-05-20T06:14:44+09:00", "utc": "1990-05-19T21:14:44Z", "ms": 643151683555.5038 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-05-21", "window": { "start": { "local": "1990-05-21T06:14:10+09:00", "utc": "1990-05-20T21:14:10Z", "ms": 643238050394.2128 }, "end": { "local": "1990-05-21T06:14:10+09:00", "utc": "1990-05-20T21:14:10Z", "ms": 643238050394.2128 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:42 on Sun 20 May to 11:11 on Mon 21 May.", "fact": "1990-05-20T04:41:42Z → 1990-05-21T02:11:02Z" }, { "step": "kaala", "text": "Sunrise is at 06:15 on the 20th and 06:14 on the 21st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 20th and is on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 17812 s" }, { "step": "ruling", "text": "Aparā Ekādaśī, Lu’an, 1990: Monday 21 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": "1990-05-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-21", "confidence": "determinate" } ], "quote": "In Lu’an, Aparā Ekādaśī 1990 falls on Monday 21 May. Ekādaśī runs from 13:42 on Sun 20 May to 11:11 on Mon 21 May and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-05-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-05-22", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25393, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-05-22T08:04:43+09:00", "utc": "1990-05-21T23:04:43Z", "ms": 643331083447.3539 }, "end": { "local": "1990-05-23T04:31:39+09:00", "utc": "1990-05-22T19:31:39Z", "ms": 643404698918.6095 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-22T08:04:43+09:00", "utc": "1990-05-21T23:04:43Z", "ms": 643331083447.3539 }, "end": { "local": "1990-05-23T04:31:39+09:00", "utc": "1990-05-22T19:31:39Z", "ms": 643404698918.6095 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-05-21", "window": { "start": { "local": "1990-05-21T20:07:02+09:00", "utc": "1990-05-21T11:07:02Z", "ms": 643288022498.8849 }, "end": { "local": "1990-05-21T21:27:55+09:00", "utc": "1990-05-21T12:27:55Z", "ms": 643292875321.1527 } }, "covered_min": 0, "window_min": 81, "qualifies": false }, { "local_date": "1990-05-22", "window": { "start": { "local": "1990-05-22T20:07:42+09:00", "utc": "1990-05-22T11:07:42Z", "ms": 643374461916.8871 }, "end": { "local": "1990-05-22T21:28:25+09:00", "utc": "1990-05-22T12:28:25Z", "ms": 643379305445.3335 } }, "covered_min": 81, "window_min": 81, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 08:05 on Tue 22 May to 04:32 on Wed 23 May.", "fact": "1990-05-21T23:04:43Z → 1990-05-22T19:31:39Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:07–21:28 on the 21st, 20:08–21:28 on the 22nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 81 minutes on the 21st and 81 of 81 on the 22nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25393 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Tuesday 22 May.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "pradosha-vrata", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "Pradosa-vrata — The sukla and krsna trayodasi tithis of each month when cover the period of 'pradosa', are observed as Pradosa-vratas." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-05-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-22", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Tuesday 22 May. Trayodaśī runs from 08:05 on Tue 22 May to 04:32 on Wed 23 May and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-05-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-05-22", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-22", "confidence": "boundary", "boundary_reasons": [ "margin", "absent-unstated" ], "boundary_margin_s": 265, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-05-23T04:31:39+09:00", "utc": "1990-05-22T19:31:39Z", "ms": 643404698918.6095 }, "end": { "local": "1990-05-24T00:42:06+09:00", "utc": "1990-05-23T15:42:06Z", "ms": 643477325615.8235 }, "month": { "amanta": 1, "purnimanta": 2, "adhika": false, "amanta_name": "Vaiśākha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-23T04:31:39+09:00", "utc": "1990-05-22T19:31:39Z", "ms": 643404698918.6095 }, "end": { "local": "1990-05-24T00:42:06+09:00", "utc": "1990-05-23T15:42:06Z", "ms": 643477325615.8235 } }, "kaala": "nishita", "days": [ { "local_date": "1990-05-22", "window": { "start": { "local": "1990-05-23T00:46:25+09:00", "utc": "1990-05-22T15:46:25Z", "ms": 643391185148.5613 }, "end": { "local": "1990-05-23T01:34:25+09:00", "utc": "1990-05-22T16:34:25Z", "ms": 643394065148.5613 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-05-23", "window": { "start": { "local": "1990-05-24T00:46:30+09:00", "utc": "1990-05-23T15:46:30Z", "ms": 643477590253.3015 }, "end": { "local": "1990-05-24T01:34:30+09:00", "utc": "1990-05-23T16:34:30Z", "ms": 643480470253.3015 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 04:32 on Wed 23 May to 00:42 on Thu 24 May.", "fact": "1990-05-22T19:31:39Z → 1990-05-23T15:42:06Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:46–01:34 on the 22nd, 00:47–01:35 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 0 of 48 minutes on the 22nd and 0 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Neither night qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 265 s < 300 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Tuesday 22 May.", "fact": "confidence: boundary (margin, 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": "1990-05-22", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-22", "confidence": "boundary" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Tuesday 22 May. Caturdaśī runs from 04:32 on Wed 23 May to 00:42 on Thu 24 May, and reaches niśītha on neither day. It is 4 min 25 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-05-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rambha-tritiya", "festival": "rambha-tritiya", "name": "Rambhā Tṛtīyā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 549, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-05-26T13:25:52+09:00", "utc": "1990-05-26T04:25:52Z", "ms": 643695952186.2795 }, "end": { "local": "1990-05-27T10:20:58+09:00", "utc": "1990-05-27T01:20:58Z", "ms": 643771258052.2349 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-26T13:25:52+09:00", "utc": "1990-05-26T04:25:52Z", "ms": 643695952186.2795 }, "end": { "local": "1990-05-27T10:20:58+09:00", "utc": "1990-05-27T01:20:58Z", "ms": 643771258052.2349 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-26", "window": { "start": { "local": "1990-05-26T12:47:01+09:00", "utc": "1990-05-26T03:47:01Z", "ms": 643693620874.8596 }, "end": { "local": "1990-05-26T13:35:01+09:00", "utc": "1990-05-26T04:35:01Z", "ms": 643696500874.8596 } }, "covered_min": 9, "window_min": 48, "qualifies": true }, { "local_date": "1990-05-27", "window": { "start": { "local": "1990-05-27T12:47:07+09:00", "utc": "1990-05-27T03:47:07Z", "ms": 643780027241.239 }, "end": { "local": "1990-05-27T13:35:07+09:00", "utc": "1990-05-27T04:35:07Z", "ms": 643782907241.239 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 13:26 on Sat 26 May to 10:21 on Sun 27 May.", "fact": "1990-05-26T04:25:52Z → 1990-05-27T01:20:58Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 26th, 12:47–13:35 on the 27th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 9 of 48 minutes on the 26th and 0 of 48 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 549 s" }, { "step": "ruling", "text": "Rambhā Tṛtīyā, Lu’an, 1990: Saturday 26 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": "1990-05-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-26", "confidence": "determinate" } ], "quote": "In Lu’an, Rambhā Tṛtīyā 1990 falls on Saturday 26 May. Tṛtīyā runs from 13:26 on Sat 26 May to 10:21 on Sun 27 May and covers 9 of 48 minutes of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/rambha-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-05-27", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8769, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-05-27T10:20:58+09:00", "utc": "1990-05-27T01:20:58Z", "ms": 643771258052.2349 }, "end": { "local": "1990-05-28T07:52:16+09:00", "utc": "1990-05-27T22:52:16Z", "ms": 643848736477.5828 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-27T10:20:58+09:00", "utc": "1990-05-27T01:20:58Z", "ms": 643771258052.2349 }, "end": { "local": "1990-05-28T07:52:16+09:00", "utc": "1990-05-27T22:52:16Z", "ms": 643848736477.5828 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-27", "window": { "start": { "local": "1990-05-27T12:47:07+09:00", "utc": "1990-05-27T03:47:07Z", "ms": 643780027241.239 }, "end": { "local": "1990-05-27T13:35:07+09:00", "utc": "1990-05-27T04:35:07Z", "ms": 643782907241.239 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-05-28", "window": { "start": { "local": "1990-05-28T12:47:14+09:00", "utc": "1990-05-28T03:47:14Z", "ms": 643866434061.8564 }, "end": { "local": "1990-05-28T13:35:14+09:00", "utc": "1990-05-28T04:35:14Z", "ms": 643869314061.8564 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:21 on Sun 27 May to 07:52 on Mon 28 May.", "fact": "1990-05-27T01:20:58Z → 1990-05-27T22:52:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 27th, 12:47–13:35 on the 28th.", "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 27th and 0 of 48 on the 28th.", "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 8769 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Sunday 27 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": "1990-05-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-27", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Sunday 27 May. Caturthī runs from 10:21 on Sun 27 May to 07:52 on Mon 28 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-05-27", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/aranya-gauri-vrata", "festival": "aranya-gauri-vrata", "name": "Araṇya Gaurī Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24038, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-05-29T06:06:43+09:00", "utc": "1990-05-28T21:06:43Z", "ms": 643928803146.3688 }, "end": { "local": "1990-05-30T05:08:29+09:00", "utc": "1990-05-29T20:08:29Z", "ms": 644011708994.2448 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-29T06:06:43+09:00", "utc": "1990-05-28T21:06:43Z", "ms": 643928803146.3688 }, "end": { "local": "1990-05-30T05:08:29+09:00", "utc": "1990-05-29T20:08:29Z", "ms": 644011708994.2448 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-29", "window": { "start": { "local": "1990-05-29T12:47:21+09:00", "utc": "1990-05-29T03:47:21Z", "ms": 643952841320.4805 }, "end": { "local": "1990-05-29T13:35:21+09:00", "utc": "1990-05-29T04:35:21Z", "ms": 643955721320.4805 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-05-30", "window": { "start": { "local": "1990-05-30T12:47:29+09:00", "utc": "1990-05-30T03:47:29Z", "ms": 644039249001.5698 }, "end": { "local": "1990-05-30T13:35:29+09:00", "utc": "1990-05-30T04:35:29Z", "ms": 644042129001.5698 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 06:07 on Tue 29 May to 05:08 on Wed 30 May.", "fact": "1990-05-28T21:06:43Z → 1990-05-29T20:08:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 29th, 12:47–13:35 on the 30th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 29th and 0 of 48 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 24038 s" }, { "step": "ruling", "text": "Araṇya Gaurī Vrata, Lu’an, 1990: Tuesday 29 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": "1990-05-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-29", "confidence": "determinate" } ], "quote": "In Lu’an, Araṇya Gaurī Vrata 1990 falls on Tuesday 29 May. Ṣaṣṭhī runs from 06:07 on Tue 29 May to 05:08 on Wed 30 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/aranya-gauri-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/skanda-shashthi-jyaishtha", "festival": "skanda-shashthi-jyaishtha", "name": "Skanda Ṣaṣṭhī (Jyaiṣṭha)", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-05-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24038, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-05-29T06:06:43+09:00", "utc": "1990-05-28T21:06:43Z", "ms": 643928803146.3688 }, "end": { "local": "1990-05-30T05:08:29+09:00", "utc": "1990-05-29T20:08:29Z", "ms": 644011708994.2448 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-05-29T06:06:43+09:00", "utc": "1990-05-28T21:06:43Z", "ms": 643928803146.3688 }, "end": { "local": "1990-05-30T05:08:29+09:00", "utc": "1990-05-29T20:08:29Z", "ms": 644011708994.2448 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-05-29", "window": { "start": { "local": "1990-05-29T12:47:21+09:00", "utc": "1990-05-29T03:47:21Z", "ms": 643952841320.4805 }, "end": { "local": "1990-05-29T13:35:21+09:00", "utc": "1990-05-29T04:35:21Z", "ms": 643955721320.4805 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-05-30", "window": { "start": { "local": "1990-05-30T12:47:29+09:00", "utc": "1990-05-30T03:47:29Z", "ms": 644039249001.5698 }, "end": { "local": "1990-05-30T13:35:29+09:00", "utc": "1990-05-30T04:35:29Z", "ms": 644042129001.5698 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 06:07 on Tue 29 May to 05:08 on Wed 30 May.", "fact": "1990-05-28T21:06:43Z → 1990-05-29T20:08:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:47–13:35 on the 29th, 12:47–13:35 on the 30th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 29th and 0 of 48 on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 24038 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī (Jyaiṣṭha), Lu’an, 1990: Tuesday 29 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": "1990-05-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-05-29", "confidence": "determinate" } ], "quote": "In Lu’an, Skanda Ṣaṣṭhī (Jyaiṣṭha) 1990 falls on Tuesday 29 May. Ṣaṣṭhī runs from 06:07 on Tue 29 May to 05:08 on Wed 30 May and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/skanda-shashthi-jyaishtha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-06-04", "festival": "ekadashi", "name": "Nirjalā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8709, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-06-03T08:34:21+09:00", "utc": "1990-06-02T23:34:21Z", "ms": 644369660634.5847 }, "end": { "local": "1990-06-04T10:41:40+09:00", "utc": "1990-06-04T01:41:40Z", "ms": 644463700015.893 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-03T08:34:21+09:00", "utc": "1990-06-02T23:34:21Z", "ms": 644369660634.5847 }, "end": { "local": "1990-06-04T10:41:40+09:00", "utc": "1990-06-04T01:41:40Z", "ms": 644463700015.893 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-06-03", "window": { "start": { "local": "1990-06-03T06:09:12+09:00", "utc": "1990-06-02T21:09:12Z", "ms": 644360951719.1918 }, "end": { "local": "1990-06-03T06:09:12+09:00", "utc": "1990-06-02T21:09:12Z", "ms": 644360951719.1918 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-06-04", "window": { "start": { "local": "1990-06-04T06:08:59+09:00", "utc": "1990-06-03T21:08:59Z", "ms": 644447339047.733 }, "end": { "local": "1990-06-04T06:08:59+09:00", "utc": "1990-06-03T21:08:59Z", "ms": 644447339047.733 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 08:34 on Sun 3 Jun to 10:42 on Mon 4 Jun.", "fact": "1990-06-02T23:34:21Z → 1990-06-04T01:41:40Z" }, { "step": "kaala", "text": "Sunrise is at 06:09 on the 3rd and 06:09 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 8709 s" }, { "step": "ruling", "text": "Nirjalā Ekādaśī, Lu’an, 1990: Monday 4 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": "1990-06-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-04", "confidence": "determinate" } ], "quote": "In Lu’an, Nirjalā Ekādaśī 1990 falls on Monday 4 June. Ekādaśī runs from 08:34 on Sun 3 Jun to 10:42 on Mon 4 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-06-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shri-rama-dvadashi", "festival": "shri-rama-dvadashi", "name": "Śrī Rāma Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 773, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-06-04T10:41:40+09:00", "utc": "1990-06-04T01:41:40Z", "ms": 644463700015.893 }, "end": { "local": "1990-06-05T13:01:16+09:00", "utc": "1990-06-05T04:01:16Z", "ms": 644558476360.0842 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-04T10:41:40+09:00", "utc": "1990-06-04T01:41:40Z", "ms": 644463700015.893 }, "end": { "local": "1990-06-05T13:01:16+09:00", "utc": "1990-06-05T04:01:16Z", "ms": 644558476360.0842 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-06-04", "window": { "start": { "local": "1990-06-04T12:48:13+09:00", "utc": "1990-06-04T03:48:13Z", "ms": 644471293221.6074 }, "end": { "local": "1990-06-04T13:36:13+09:00", "utc": "1990-06-04T04:36:13Z", "ms": 644474173221.6074 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-06-05", "window": { "start": { "local": "1990-06-05T12:48:23+09:00", "utc": "1990-06-05T03:48:23Z", "ms": 644557703124.3201 }, "end": { "local": "1990-06-05T13:36:23+09:00", "utc": "1990-06-05T04:36:23Z", "ms": 644560583124.3201 } }, "covered_min": 13, "window_min": 48, "qualifies": true } ], "decided_by": "purvaviddha", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 10:42 on Mon 4 Jun to 13:01 on Tue 5 Jun.", "fact": "1990-06-04T01:41:40Z → 1990-06-05T04:01:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:48–13:36 on the 4th, 12:48–13:36 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 48 of 48 minutes on the 4th and 13 of 48 on the 5th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Both middays qualify. Pūrvaviddhā: the first is taken.", "fact": "priority: purvaviddha → purvaviddha · margin 773 s" }, { "step": "ruling", "text": "Śrī Rāma Dvādaśī, Lu’an, 1990: Monday 4 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": "1990-06-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-04", "confidence": "determinate" } ], "quote": "In Lu’an, Śrī Rāma Dvādaśī 1990 falls on Monday 4 June. Dvādaśī runs from 10:42 on Mon 4 Jun to 13:01 on Tue 5 Jun and covers all of madhyāhna that midday. It also reaches the next midday for 13 minutes; by the rule the first midday is taken.", "cite": "https://ahargana.org/lu-an/festivals/1990/shri-rama-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-06-05", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17482, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-06-05T13:01:16+09:00", "utc": "1990-06-05T04:01:16Z", "ms": 644558476360.0842 }, "end": { "local": "1990-06-06T15:25:07+09:00", "utc": "1990-06-06T06:25:07Z", "ms": 644653507045.3772 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-05T13:01:16+09:00", "utc": "1990-06-05T04:01:16Z", "ms": 644558476360.0842 }, "end": { "local": "1990-06-06T15:25:07+09:00", "utc": "1990-06-06T06:25:07Z", "ms": 644653507045.3772 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-06-05", "window": { "start": { "local": "1990-06-05T20:15:58+09:00", "utc": "1990-06-05T11:15:58Z", "ms": 644584558392.9447 }, "end": { "local": "1990-06-05T21:35:00+09:00", "utc": "1990-06-05T12:35:00Z", "ms": 644589299692.7898 } }, "covered_min": 79, "window_min": 79, "qualifies": true }, { "local_date": "1990-06-06", "window": { "start": { "local": "1990-06-06T20:16:29+09:00", "utc": "1990-06-06T11:16:29Z", "ms": 644670988546.8132 }, "end": { "local": "1990-06-06T21:35:25+09:00", "utc": "1990-06-06T12:35:25Z", "ms": 644675724727.7461 } }, "covered_min": 0, "window_min": 79, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:01 on Tue 5 Jun to 15:25 on Wed 6 Jun.", "fact": "1990-06-05T04:01:16Z → 1990-06-06T06:25:07Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:16–21:35 on the 5th, 20:16–21:35 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 79 of 79 minutes on the 5th and 0 of 79 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 17482 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Tuesday 5 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": "1990-06-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-05", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Tuesday 5 June. Trayodaśī runs from 13:01 on Tue 5 Jun to 15:25 on Wed 6 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-06-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vata-savitri-vrata", "festival": "vata-savitri-vrata", "name": "Vaṭa Sāvitrī Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 979, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-06-07T17:46:45+09:00", "utc": "1990-06-07T08:46:45Z", "ms": 644748404798.312 }, "end": { "local": "1990-06-08T20:01:07+09:00", "utc": "1990-06-08T11:01:07Z", "ms": 644842867075.6508 }, "month": { "amanta": 2, "purnimanta": 2, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Jyeṣṭha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-07T17:46:45+09:00", "utc": "1990-06-07T08:46:45Z", "ms": 644748404798.312 }, "end": { "local": "1990-06-08T20:01:07+09:00", "utc": "1990-06-08T11:01:07Z", "ms": 644842867075.6508 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-06-07", "window": { "start": { "local": "1990-06-07T20:16:58+09:00", "utc": "1990-06-07T11:16:58Z", "ms": 644757417827.537 }, "end": { "local": "1990-06-07T21:35:49+09:00", "utc": "1990-06-07T12:35:49Z", "ms": 644762149202.3584 } }, "covered_min": 79, "window_min": 79, "qualifies": true }, { "local_date": "1990-06-08", "window": { "start": { "local": "1990-06-08T20:17:26+09:00", "utc": "1990-06-08T11:17:26Z", "ms": 644843846205.808 }, "end": { "local": "1990-06-08T21:36:13+09:00", "utc": "1990-06-08T12:36:13Z", "ms": 644848573090.6945 } }, "covered_min": 0, "window_min": 79, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 17:47 on Thu 7 Jun to 20:01 on Fri 8 Jun.", "fact": "1990-06-07T08:46:45Z → 1990-06-08T11:01:07Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:17–21:36 on the 7th, 20:17–21:36 on the 8th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 79 of 79 minutes on the 7th and 0 of 79 on the 8th.", "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 979 s" }, { "step": "ruling", "text": "Vaṭa Sāvitrī Vrata, Lu’an, 1990: Thursday 7 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": "1990-06-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-07", "confidence": "determinate" } ], "quote": "In Lu’an, Vaṭa Sāvitrī Vrata 1990 falls on Thursday 7 June. Pūrṇimā runs from 17:47 on Thu 7 Jun to 20:01 on Fri 8 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/vata-savitri-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-06-12", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9243, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-06-12T01:19:28+09:00", "utc": "1990-06-11T16:19:28Z", "ms": 645121168245.1552 }, "end": { "local": "1990-06-13T02:22:59+09:00", "utc": "1990-06-12T17:22:59Z", "ms": 645211378662.4387 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-12T01:19:28+09:00", "utc": "1990-06-11T16:19:28Z", "ms": 645121168245.1552 }, "end": { "local": "1990-06-13T02:22:59+09:00", "utc": "1990-06-12T17:22:59Z", "ms": 645211378662.4387 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-06-11", "window": { "start": { "local": "1990-06-11T22:45:26+09:00", "utc": "1990-06-11T13:45:26Z", "ms": 645111925630.4647 }, "end": { "local": "1990-06-11T22:45:26+09:00", "utc": "1990-06-11T13:45:26Z", "ms": 645111925630.4647 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-06-12", "window": { "start": { "local": "1990-06-12T23:21:56+09:00", "utc": "1990-06-12T14:21:56Z", "ms": 645200515999.6753 }, "end": { "local": "1990-06-12T23:21:56+09:00", "utc": "1990-06-12T14:21:56Z", "ms": 645200515999.6753 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 01:19 on Tue 12 Jun to 02:23 on Wed 13 Jun.", "fact": "1990-06-11T16:19:28Z → 1990-06-12T17:22:59Z" }, { "step": "kaala", "text": "Moonrise is at 22:45 on the 11th and 23:22 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 9243 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Tuesday 12 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": "1990-06-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-12", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Tuesday 12 June. Caturthī runs from 01:19 on Tue 12 Jun to 02:23 on Wed 13 Jun and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-06-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-06-19", "festival": "ekadashi", "name": "Yoginī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33901, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-06-18T20:43:43+09:00", "utc": "1990-06-18T11:43:43Z", "ms": 645709422820.5812 }, "end": { "local": "1990-06-19T17:46:49+09:00", "utc": "1990-06-19T08:46:49Z", "ms": 645785209159.9491 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-18T20:43:43+09:00", "utc": "1990-06-18T11:43:43Z", "ms": 645709422820.5812 }, "end": { "local": "1990-06-19T17:46:49+09:00", "utc": "1990-06-19T08:46:49Z", "ms": 645785209159.9491 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-06-19", "window": { "start": { "local": "1990-06-19T06:08:44+09:00", "utc": "1990-06-18T21:08:44Z", "ms": 645743324002.5428 }, "end": { "local": "1990-06-19T06:08:44+09:00", "utc": "1990-06-18T21:08:44Z", "ms": 645743324002.5428 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-06-20", "window": { "start": { "local": "1990-06-20T06:08:54+09:00", "utc": "1990-06-19T21:08:54Z", "ms": 645829734255.7394 }, "end": { "local": "1990-06-20T06:08:54+09:00", "utc": "1990-06-19T21:08:54Z", "ms": 645829734255.7394 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 20:44 on Mon 18 Jun to 17:47 on Tue 19 Jun.", "fact": "1990-06-18T11:43:43Z → 1990-06-19T08:46:49Z" }, { "step": "kaala", "text": "Sunrise is at 06:09 on the 19th and 06:09 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 33901 s" }, { "step": "ruling", "text": "Yoginī Ekādaśī, Lu’an, 1990: Tuesday 19 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": "1990-06-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-19", "confidence": "determinate" } ], "quote": "In Lu’an, Yoginī Ekādaśī 1990 falls on Tuesday 19 June. Ekādaśī runs from 20:44 on Mon 18 Jun to 17:47 on Tue 19 Jun and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-06-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-06-20", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 21205, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-06-20T14:28:21+09:00", "utc": "1990-06-20T05:28:21Z", "ms": 645859700828.1001 }, "end": { "local": "1990-06-21T10:57:01+09:00", "utc": "1990-06-21T01:57:01Z", "ms": 645933421440.7386 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-20T14:28:21+09:00", "utc": "1990-06-20T05:28:21Z", "ms": 645859700828.1001 }, "end": { "local": "1990-06-21T10:57:01+09:00", "utc": "1990-06-21T01:57:01Z", "ms": 645933421440.7386 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-06-20", "window": { "start": { "local": "1990-06-20T20:21:46+09:00", "utc": "1990-06-20T11:21:46Z", "ms": 645880905903.3011 }, "end": { "local": "1990-06-20T21:40:05+09:00", "utc": "1990-06-20T12:40:05Z", "ms": 645885604558.7267 } }, "covered_min": 78, "window_min": 78, "qualifies": true }, { "local_date": "1990-06-21", "window": { "start": { "local": "1990-06-21T20:22:00+09:00", "utc": "1990-06-21T11:22:00Z", "ms": 645967319946.981 }, "end": { "local": "1990-06-21T21:40:18+09:00", "utc": "1990-06-21T12:40:18Z", "ms": 645972018442.5569 } }, "covered_min": 0, "window_min": 78, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 14:28 on Wed 20 Jun to 10:57 on Thu 21 Jun.", "fact": "1990-06-20T05:28:21Z → 1990-06-21T01:57:01Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:22–21:40 on the 20th, 20:22–21:40 on the 21st.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 78 of 78 minutes on the 20th and 0 of 78 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 21205 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Wednesday 20 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": "1990-06-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-20", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Wednesday 20 June. Trayodaśī runs from 14:28 on Wed 20 Jun to 10:57 on Thu 21 Jun and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-06-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-06-21", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20567, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-06-21T10:57:01+09:00", "utc": "1990-06-21T01:57:01Z", "ms": 645933421440.7386 }, "end": { "local": "1990-06-22T07:22:26+09:00", "utc": "1990-06-21T22:22:26Z", "ms": 646006946325.9431 }, "month": { "amanta": 2, "purnimanta": 3, "adhika": false, "amanta_name": "Jyeṣṭha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-21T10:57:01+09:00", "utc": "1990-06-21T01:57:01Z", "ms": 645933421440.7386 }, "end": { "local": "1990-06-22T07:22:26+09:00", "utc": "1990-06-21T22:22:26Z", "ms": 646006946325.9431 } }, "kaala": "nishita", "days": [ { "local_date": "1990-06-20", "window": { "start": { "local": "1990-06-21T00:51:26+09:00", "utc": "1990-06-20T15:51:26Z", "ms": 645897085861.147 }, "end": { "local": "1990-06-21T01:39:26+09:00", "utc": "1990-06-20T16:39:26Z", "ms": 645899965861.147 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-06-21", "window": { "start": { "local": "1990-06-22T00:51:39+09:00", "utc": "1990-06-21T15:51:39Z", "ms": 645983499305.3906 }, "end": { "local": "1990-06-22T01:39:39+09:00", "utc": "1990-06-21T16:39:39Z", "ms": 645986379305.3906 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 10:57 on Thu 21 Jun to 07:22 on Fri 22 Jun.", "fact": "1990-06-21T01:57:01Z → 1990-06-21T22:22:26Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:51–01:39 on the 20th, 00:52–01:40 on the 21st.", "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 20th and 48 of 48 on the 21st.", "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 20567 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Thursday 21 June.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "shivaratri", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion)." } ], "not_evaluated": "The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.", "kaala": "nishita", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-06-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-21", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Thursday 21 June. Caturdaśī runs from 10:57 on Thu 21 Jun to 07:22 on Fri 22 Jun and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-06-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rathayatra", "festival": "rathayatra", "name": "Rathayātrā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29900, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1990-06-24T00:43:27+09:00", "utc": "1990-06-23T15:43:27Z", "ms": 646155807349.7125 }, "end": { "local": "1990-06-24T21:58:31+09:00", "utc": "1990-06-24T12:58:31Z", "ms": 646232310763.408 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-24T00:43:27+09:00", "utc": "1990-06-23T15:43:27Z", "ms": 646155807349.7125 }, "end": { "local": "1990-06-24T21:58:31+09:00", "utc": "1990-06-24T12:58:31Z", "ms": 646232310763.408 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-06-23", "window": { "start": { "local": "1990-06-23T12:51:58+09:00", "utc": "1990-06-23T03:51:58Z", "ms": 646113118429.5704 }, "end": { "local": "1990-06-23T13:39:58+09:00", "utc": "1990-06-23T04:39:58Z", "ms": 646115998429.5704 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-06-24", "window": { "start": { "local": "1990-06-24T12:52:11+09:00", "utc": "1990-06-24T03:52:11Z", "ms": 646199531113.2981 }, "end": { "local": "1990-06-24T13:40:11+09:00", "utc": "1990-06-24T04:40:11Z", "ms": 646202411113.2981 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 00:43 on Sun 24 Jun to 21:59 on Sun 24 Jun.", "fact": "1990-06-23T15:43:27Z → 1990-06-24T12:58:31Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:52–13:40 on the 23rd, 12:52–13:40 on the 24th.", "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 23rd and 48 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 29900 s" }, { "step": "ruling", "text": "Rathayātrā, Lu’an, 1990: Sunday 24 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": "1990-06-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-24", "confidence": "determinate" } ], "quote": "In Lu’an, Rathayātrā 1990 falls on Sunday 24 June. Dvitīyā runs from 00:43 on Sun 24 Jun to 21:59 on Sun 24 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/rathayatra", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-06-26", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16721, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-06-25T19:48:12+09:00", "utc": "1990-06-25T10:48:12Z", "ms": 646310892304.1052 }, "end": { "local": "1990-06-26T18:19:17+09:00", "utc": "1990-06-26T09:19:17Z", "ms": 646391957394.9329 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-25T19:48:12+09:00", "utc": "1990-06-25T10:48:12Z", "ms": 646310892304.1052 }, "end": { "local": "1990-06-26T18:19:17+09:00", "utc": "1990-06-26T09:19:17Z", "ms": 646391957394.9329 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-06-25", "window": { "start": { "local": "1990-06-25T12:52:24+09:00", "utc": "1990-06-25T03:52:24Z", "ms": 646285943698.3508 }, "end": { "local": "1990-06-25T13:40:24+09:00", "utc": "1990-06-25T04:40:24Z", "ms": 646288823698.3508 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-06-26", "window": { "start": { "local": "1990-06-26T12:52:36+09:00", "utc": "1990-06-26T03:52:36Z", "ms": 646372356156.9417 }, "end": { "local": "1990-06-26T13:40:36+09:00", "utc": "1990-06-26T04:40:36Z", "ms": 646375236156.9417 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 19:48 on Mon 25 Jun to 18:19 on Tue 26 Jun.", "fact": "1990-06-25T10:48:12Z → 1990-06-26T09:19:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:52–13:40 on the 25th, 12:53–13:41 on the 26th.", "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 25th and 48 of 48 on the 26th.", "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 16721 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Tuesday 26 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": "1990-06-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-26", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Tuesday 26 June. Caturthī runs from 19:48 on Mon 25 Jun to 18:19 on Tue 26 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-06-26", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/skanda-panchami", "festival": "skanda-panchami", "name": "Skanda Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14118, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-06-26T18:19:17+09:00", "utc": "1990-06-26T09:19:17Z", "ms": 646391957394.9329 }, "end": { "local": "1990-06-27T17:36:07+09:00", "utc": "1990-06-27T08:36:07Z", "ms": 646475766670.0073 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-26T18:19:17+09:00", "utc": "1990-06-26T09:19:17Z", "ms": 646391957394.9329 }, "end": { "local": "1990-06-27T17:36:07+09:00", "utc": "1990-06-27T08:36:07Z", "ms": 646475766670.0073 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-06-26", "window": { "start": { "local": "1990-06-26T12:52:36+09:00", "utc": "1990-06-26T03:52:36Z", "ms": 646372356156.9417 }, "end": { "local": "1990-06-26T13:40:36+09:00", "utc": "1990-06-26T04:40:36Z", "ms": 646375236156.9417 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-06-27", "window": { "start": { "local": "1990-06-27T12:52:48+09:00", "utc": "1990-06-27T03:52:48Z", "ms": 646458768462.7949 }, "end": { "local": "1990-06-27T13:40:48+09:00", "utc": "1990-06-27T04:40:48Z", "ms": 646461648462.7949 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 18:19 on Tue 26 Jun to 17:36 on Wed 27 Jun.", "fact": "1990-06-26T09:19:17Z → 1990-06-27T08:36:07Z" }, { "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": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 26th and 48 of 48 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 14118 s" }, { "step": "ruling", "text": "Skanda Pañcamī, Lu’an, 1990: Wednesday 27 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": "1990-06-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-27", "confidence": "determinate" } ], "quote": "In Lu’an, Skanda Pañcamī 1990 falls on Wednesday 27 June. Pañcamī runs from 18:19 on Tue 26 Jun to 17:36 on Wed 27 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/skanda-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vivasvat-saptami", "festival": "vivasvat-saptami", "name": "Vivasvat Saptamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-06-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14333, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1990-06-28T17:39:54+09:00", "utc": "1990-06-28T08:39:54Z", "ms": 646562393932.5469 }, "end": { "local": "1990-06-29T18:28:17+09:00", "utc": "1990-06-29T09:28:17Z", "ms": 646651697319.4926 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-06-28T17:39:54+09:00", "utc": "1990-06-28T08:39:54Z", "ms": 646562393932.5469 }, "end": { "local": "1990-06-29T18:28:17+09:00", "utc": "1990-06-29T09:28:17Z", "ms": 646651697319.4926 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-06-28", "window": { "start": { "local": "1990-06-28T12:53:01+09:00", "utc": "1990-06-28T03:53:01Z", "ms": 646545180591.124 }, "end": { "local": "1990-06-28T13:41:01+09:00", "utc": "1990-06-28T04:41:01Z", "ms": 646548060591.124 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-06-29", "window": { "start": { "local": "1990-06-29T12:53:13+09:00", "utc": "1990-06-29T03:53:13Z", "ms": 646631592518.4751 }, "end": { "local": "1990-06-29T13:41:13+09:00", "utc": "1990-06-29T04:41:13Z", "ms": 646634472518.4751 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 17:40 on Thu 28 Jun to 18:28 on Fri 29 Jun.", "fact": "1990-06-28T08:39:54Z → 1990-06-29T09:28:17Z" }, { "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": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 28th and 48 of 48 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 14333 s" }, { "step": "ruling", "text": "Vivasvat Saptamī, Lu’an, 1990: Friday 29 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": "1990-06-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-06-29", "confidence": "determinate" } ], "quote": "In Lu’an, Vivasvat Saptamī 1990 falls on Friday 29 June. Saptamī runs from 17:40 on Thu 28 Jun to 18:28 on Fri 29 Jun and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vivasvat-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-07-03", "festival": "ekadashi", "name": "Hariśayanī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13387, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-07-03T00:07:18+09:00", "utc": "1990-07-02T15:07:18Z", "ms": 646931237855.6552 }, "end": { "local": "1990-07-04T02:30:14+09:00", "utc": "1990-07-03T17:30:14Z", "ms": 647026214012.2043 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-07-03T00:07:18+09:00", "utc": "1990-07-02T15:07:18Z", "ms": 646931237855.6552 }, "end": { "local": "1990-07-04T02:30:14+09:00", "utc": "1990-07-03T17:30:14Z", "ms": 647026214012.2043 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-07-03", "window": { "start": { "local": "1990-07-03T06:12:56+09:00", "utc": "1990-07-02T21:12:56Z", "ms": 646953175594.4668 }, "end": { "local": "1990-07-03T06:12:56+09:00", "utc": "1990-07-02T21:12:56Z", "ms": 646953175594.4668 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-07-04", "window": { "start": { "local": "1990-07-04T06:13:21+09:00", "utc": "1990-07-03T21:13:21Z", "ms": 647039601384.673 }, "end": { "local": "1990-07-04T06:13:21+09:00", "utc": "1990-07-03T21:13:21Z", "ms": 647039601384.673 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 00:07 on Tue 3 Jul to 02:30 on Wed 4 Jul.", "fact": "1990-07-02T15:07:18Z → 1990-07-03T17:30:14Z" }, { "step": "kaala", "text": "Sunrise is at 06:13 on the 3rd and 06:13 on the 4th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 3rd and is not on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 13387 s" }, { "step": "ruling", "text": "Hariśayanī Ekādaśī, Lu’an, 1990: Tuesday 3 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": "1990-07-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-03", "confidence": "determinate" } ], "quote": "In Lu’an, Hariśayanī Ekādaśī 1990 falls on Tuesday 3 July. Ekādaśī runs from 00:07 on Tue 3 Jul to 02:30 on Wed 4 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-07-03", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-07-05", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25729, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-07-05T04:50:32+09:00", "utc": "1990-07-04T19:50:32Z", "ms": 647121031544.5183 }, "end": { "local": "1990-07-06T06:59:53+09:00", "utc": "1990-07-05T21:59:53Z", "ms": 647215193090.9447 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-07-05T04:50:32+09:00", "utc": "1990-07-04T19:50:32Z", "ms": 647121031544.5183 }, "end": { "local": "1990-07-06T06:59:53+09:00", "utc": "1990-07-05T21:59:53Z", "ms": 647215193090.9447 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-07-04", "window": { "start": { "local": "1990-07-04T20:22:55+09:00", "utc": "1990-07-04T11:22:55Z", "ms": 647090575399.9369 }, "end": { "local": "1990-07-04T21:41:42+09:00", "utc": "1990-07-04T12:41:42Z", "ms": 647095302420.4799 } }, "covered_min": 0, "window_min": 79, "qualifies": false }, { "local_date": "1990-07-05", "window": { "start": { "local": "1990-07-05T20:22:49+09:00", "utc": "1990-07-05T11:22:49Z", "ms": 647176969301.7024 }, "end": { "local": "1990-07-05T21:41:41+09:00", "utc": "1990-07-05T12:41:41Z", "ms": 647181700804.4546 } }, "covered_min": 79, "window_min": 79, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:51 on Thu 5 Jul to 07:00 on Fri 6 Jul.", "fact": "1990-07-04T19:50:32Z → 1990-07-05T21:59:53Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:23–21:42 on the 4th, 20:23–21:42 on the 5th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 79 minutes on the 4th and 79 of 79 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 25729 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Thursday 5 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": "1990-07-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-05", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Thursday 5 July. Trayodaśī runs from 04:51 on Thu 5 Jul to 07:00 on Fri 6 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-07-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/guru-purnima", "festival": "guru-purnima", "name": "Guru Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9078, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-07-07", "window": { "start": { "local": "1990-07-07T12:54:38+09:00", "utc": "1990-07-07T03:54:38Z", "ms": 647322878218.5835 }, "end": { "local": "1990-07-07T13:42:38+09:00", "utc": "1990-07-07T04:42:38Z", "ms": 647325758218.5835 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-07-08", "window": { "start": { "local": "1990-07-08T12:54:47+09:00", "utc": "1990-07-08T03:54:47Z", "ms": 647409287442.1733 }, "end": { "local": "1990-07-08T13:42:47+09:00", "utc": "1990-07-08T04:42:47Z", "ms": 647412167442.1733 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul.", "fact": "1990-07-06T23:52:14Z → 1990-07-08T01:23:29Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:55–13:43 on the 7th, 12:55–13:43 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 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 9078 s" }, { "step": "ruling", "text": "Guru Pūrṇimā, Lu’an, 1990: Saturday 7 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": "1990-07-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-07", "confidence": "determinate" } ], "quote": "In Lu’an, Guru Pūrṇimā 1990 falls on Saturday 7 July. Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/guru-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/kokila-vrata", "festival": "kokila-vrata", "name": "Kokilā Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25767, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 } }, "kaala": "sayahna", "days": [ { "local_date": "1990-07-07", "window": { "start": { "local": "1990-07-07T17:32:59+09:00", "utc": "1990-07-07T08:32:59Z", "ms": 647339578803.8356 }, "end": { "local": "1990-07-07T20:22:33+09:00", "utc": "1990-07-07T11:22:33Z", "ms": 647349752527.337 } }, "covered_min": 170, "window_min": 170, "qualifies": true }, { "local_date": "1990-07-08", "window": { "start": { "local": "1990-07-08T17:32:56+09:00", "utc": "1990-07-08T08:32:56Z", "ms": 647425976085.2938 }, "end": { "local": "1990-07-08T20:22:22+09:00", "utc": "1990-07-08T11:22:22Z", "ms": 647436141847.3741 } }, "covered_min": 0, "window_min": 169, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul.", "fact": "1990-07-06T23:52:14Z → 1990-07-08T01:23:29Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 17:33–20:23 on the 7th, 17:33–20:22 on the 8th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during sāyāhna. It covers 170 of 170 minutes on the 7th and 0 of 169 on the 8th.", "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 25767 s" }, { "step": "ruling", "text": "Kokilā Vrata, Lu’an, 1990: Saturday 7 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": "1990-07-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-07", "confidence": "determinate" } ], "quote": "In Lu’an, Kokilā Vrata 1990 falls on Saturday 7 July. Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul and covers all of sāyāhna that late afternoon.", "cite": "https://ahargana.org/lu-an/festivals/1990/kokila-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shiva-shayanotsava", "festival": "shiva-shayanotsava", "name": "Śiva Śayanotsava", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35933, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-07-07", "window": { "start": { "local": "1990-07-07T20:22:33+09:00", "utc": "1990-07-07T11:22:33Z", "ms": 647349752527.337 }, "end": { "local": "1990-07-07T21:41:34+09:00", "utc": "1990-07-07T12:41:34Z", "ms": 647354493928.6218 } }, "covered_min": 79, "window_min": 79, "qualifies": true }, { "local_date": "1990-07-08", "window": { "start": { "local": "1990-07-08T20:22:22+09:00", "utc": "1990-07-08T11:22:22Z", "ms": 647436141847.3741 }, "end": { "local": "1990-07-08T21:41:29+09:00", "utc": "1990-07-08T12:41:29Z", "ms": 647440888657.6791 } }, "covered_min": 0, "window_min": 79, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul.", "fact": "1990-07-06T23:52:14Z → 1990-07-08T01:23:29Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:23–21:42 on the 7th, 20:22–21:41 on the 8th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 79 of 79 minutes on the 7th and 0 of 79 on the 8th.", "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 35933 s" }, { "step": "ruling", "text": "Śiva Śayanotsava, Lu’an, 1990: Saturday 7 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": "1990-07-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-07", "confidence": "determinate" } ], "quote": "In Lu’an, Śiva Śayanotsava 1990 falls on Saturday 7 July. Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/shiva-shayanotsava", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vyasa-puja", "festival": "vyasa-puja", "name": "Vyāsa Pūjā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 724, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 }, "month": { "amanta": 3, "purnimanta": 3, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Āṣāḍha" } }, "span": { "of": "tithi", "start": { "local": "1990-07-07T08:52:14+09:00", "utc": "1990-07-06T23:52:14Z", "ms": 647308333812.439 }, "end": { "local": "1990-07-08T10:23:29+09:00", "utc": "1990-07-08T01:23:29Z", "ms": 647400209036.0781 } }, "kaala": "udaya-3", "days": [ { "local_date": "1990-07-07", "window": { "start": { "local": "1990-07-07T06:14:44+09:00", "utc": "1990-07-06T21:14:44Z", "ms": 647298883909.8298 }, "end": { "local": "1990-07-07T09:04:18+09:00", "utc": "1990-07-07T00:04:18Z", "ms": 647309057633.3313 } }, "covered_min": 12, "window_min": 170, "qualifies": false }, { "local_date": "1990-07-08", "window": { "start": { "local": "1990-07-08T06:15:13+09:00", "utc": "1990-07-07T21:15:13Z", "ms": 647385313036.9725 }, "end": { "local": "1990-07-08T09:04:39+09:00", "utc": "1990-07-08T00:04:39Z", "ms": 647395478799.0529 } }, "covered_min": 169, "window_min": 169, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul.", "fact": "1990-07-06T23:52:14Z → 1990-07-08T01:23:29Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:15–09:04 on the 7th, 06:15–09:05 on the 8th.", "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 12 of 170 minutes on the 7th and 169 of 169 on the 8th.", "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 724 s" }, { "step": "ruling", "text": "Vyāsa Pūjā, Lu’an, 1990: Sunday 8 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": "1990-07-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-08", "confidence": "determinate" } ], "quote": "In Lu’an, Vyāsa Pūjā 1990 falls on Sunday 8 July. Pūrṇimā runs from 08:52 on Sat 7 Jul to 10:23 on Sun 8 Jul and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/lu-an/festivals/1990/vyasa-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ashunya-shayana-vrata-ashadha", "festival": "ashunya-shayana-vrata-ashadha", "name": "Aśūnya Śayana Vrata (Āṣāḍha)", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35031, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1990-07-09T11:31:05+09:00", "utc": "1990-07-09T02:31:05Z", "ms": 647490664707.3531 }, "end": { "local": "1990-07-10T12:13:24+09:00", "utc": "1990-07-10T03:13:24Z", "ms": 647579604456.869 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-09T11:31:05+09:00", "utc": "1990-07-09T02:31:05Z", "ms": 647490664707.3531 }, "end": { "local": "1990-07-10T12:13:24+09:00", "utc": "1990-07-10T03:13:24Z", "ms": 647579604456.869 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-07-09", "window": { "start": { "local": "1990-07-09T21:23:03+09:00", "utc": "1990-07-09T12:23:03Z", "ms": 647526183249.8253 }, "end": { "local": "1990-07-09T21:23:03+09:00", "utc": "1990-07-09T12:23:03Z", "ms": 647526183249.8253 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-07-10", "window": { "start": { "local": "1990-07-10T21:57:15+09:00", "utc": "1990-07-10T12:57:15Z", "ms": 647614635232.8319 }, "end": { "local": "1990-07-10T21:57:15+09:00", "utc": "1990-07-10T12:57:15Z", "ms": 647614635232.8319 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 11:31 on Mon 9 Jul to 12:13 on Tue 10 Jul.", "fact": "1990-07-09T02:31:05Z → 1990-07-10T03:13:24Z" }, { "step": "kaala", "text": "Moonrise is at 21:23 on the 9th and 21:57 on the 10th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Dvitīyā 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. 102" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 35031 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata (Āṣāḍha), Lu’an, 1990: Monday 9 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": "1990-07-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-09", "confidence": "determinate" } ], "quote": "In Lu’an, Aśūnya Śayana Vrata (Āṣāḍha) 1990 falls on Monday 9 July. Dvitīyā runs from 11:31 on Mon 9 Jul to 12:13 on Tue 10 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ashunya-shayana-vrata-ashadha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-07-11", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 35951, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-07-11T12:29:24+09:00", "utc": "1990-07-11T03:29:24Z", "ms": 647666963589.4628 }, "end": { "local": "1990-07-12T12:18:15+09:00", "utc": "1990-07-12T03:18:15Z", "ms": 647752695495.2892 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-11T12:29:24+09:00", "utc": "1990-07-11T03:29:24Z", "ms": 647666963589.4628 }, "end": { "local": "1990-07-12T12:18:15+09:00", "utc": "1990-07-12T03:18:15Z", "ms": 647752695495.2892 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-07-11", "window": { "start": { "local": "1990-07-11T22:28:35+09:00", "utc": "1990-07-11T13:28:35Z", "ms": 647702914525.4028 }, "end": { "local": "1990-07-11T22:28:35+09:00", "utc": "1990-07-11T13:28:35Z", "ms": 647702914525.4028 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-07-12", "window": { "start": { "local": "1990-07-12T22:58:19+09:00", "utc": "1990-07-12T13:58:19Z", "ms": 647791099140.5854 }, "end": { "local": "1990-07-12T22:58:19+09:00", "utc": "1990-07-12T13:58:19Z", "ms": 647791099140.5854 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 12:29 on Wed 11 Jul to 12:18 on Thu 12 Jul.", "fact": "1990-07-11T03:29:24Z → 1990-07-12T03:18:15Z" }, { "step": "kaala", "text": "Moonrise is at 22:29 on the 11th and 22:58 on the 12th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 11th and is not 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 35951 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Wednesday 11 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": "1990-07-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-11", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Wednesday 11 July. Caturthī runs from 12:29 on Wed 11 Jul to 12:18 on Thu 12 Jul and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-07-11", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-07-18", "festival": "ekadashi", "name": "Kāmikā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15508, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-07-18T02:02:13+09:00", "utc": "1990-07-17T17:02:13Z", "ms": 648234133041.2366 }, "end": { "local": "1990-07-18T23:10:42+09:00", "utc": "1990-07-18T14:10:42Z", "ms": 648310242201.8289 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-18T02:02:13+09:00", "utc": "1990-07-17T17:02:13Z", "ms": 648234133041.2366 }, "end": { "local": "1990-07-18T23:10:42+09:00", "utc": "1990-07-18T14:10:42Z", "ms": 648310242201.8289 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-07-18", "window": { "start": { "local": "1990-07-18T06:20:41+09:00", "utc": "1990-07-17T21:20:41Z", "ms": 648249641418.8206 }, "end": { "local": "1990-07-18T06:20:41+09:00", "utc": "1990-07-17T21:20:41Z", "ms": 648249641418.8206 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-07-19", "window": { "start": { "local": "1990-07-19T06:21:17+09:00", "utc": "1990-07-18T21:21:17Z", "ms": 648336077318.5356 }, "end": { "local": "1990-07-19T06:21:17+09:00", "utc": "1990-07-18T21:21:17Z", "ms": 648336077318.5356 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 02:02 on Wed 18 Jul to 23:11 on Wed 18 Jul.", "fact": "1990-07-17T17:02:13Z → 1990-07-18T14:10:42Z" }, { "step": "kaala", "text": "Sunrise is at 06:21 on the 18th and 06:21 on the 19th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 18th and is not on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 15508 s" }, { "step": "ruling", "text": "Kāmikā Ekādaśī, Lu’an, 1990: Wednesday 18 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": "1990-07-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-18", "confidence": "determinate" } ], "quote": "In Lu’an, Kāmikā Ekādaśī 1990 falls on Wednesday 18 July. Ekādaśī runs from 02:02 on Wed 18 Jul to 23:11 on Wed 18 Jul and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-07-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-07-19", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 359, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-07-19T20:12:46+09:00", "utc": "1990-07-19T11:12:46Z", "ms": 648385965575.9188 }, "end": { "local": "1990-07-20T17:15:32+09:00", "utc": "1990-07-20T08:15:32Z", "ms": 648461732488.2808 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-19T20:12:46+09:00", "utc": "1990-07-19T11:12:46Z", "ms": 648385965575.9188 }, "end": { "local": "1990-07-20T17:15:32+09:00", "utc": "1990-07-20T08:15:32Z", "ms": 648461732488.2808 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-07-19", "window": { "start": { "local": "1990-07-19T20:18:44+09:00", "utc": "1990-07-19T11:18:44Z", "ms": 648386324136.6987 }, "end": { "local": "1990-07-19T21:39:09+09:00", "utc": "1990-07-19T12:39:09Z", "ms": 648391149404.5411 } }, "covered_min": 80, "window_min": 80, "qualifies": true }, { "local_date": "1990-07-20", "window": { "start": { "local": "1990-07-20T20:18:15+09:00", "utc": "1990-07-20T11:18:15Z", "ms": 648472695364.2312 }, "end": { "local": "1990-07-20T21:38:49+09:00", "utc": "1990-07-20T12:38:49Z", "ms": 648477529364.2102 } }, "covered_min": 0, "window_min": 81, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:13 on Thu 19 Jul to 17:16 on Fri 20 Jul.", "fact": "1990-07-19T11:12:46Z → 1990-07-20T08:15:32Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:19–21:39 on the 19th, 20:18–21:39 on the 20th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 80 of 80 minutes on the 19th and 0 of 81 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 359 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Thursday 19 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": "1990-07-19", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-19", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Thursday 19 July. Trayodaśī runs from 20:13 on Thu 19 Jul to 17:16 on Fri 20 Jul and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-07-19", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-07-20", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27650, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-07-20T17:15:32+09:00", "utc": "1990-07-20T08:15:32Z", "ms": 648461732488.2808 }, "end": { "local": "1990-07-21T14:26:45+09:00", "utc": "1990-07-21T05:26:45Z", "ms": 648538004695.5809 }, "month": { "amanta": 3, "purnimanta": 4, "adhika": false, "amanta_name": "Āṣāḍha", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-20T17:15:32+09:00", "utc": "1990-07-20T08:15:32Z", "ms": 648461732488.2808 }, "end": { "local": "1990-07-21T14:26:45+09:00", "utc": "1990-07-21T05:26:45Z", "ms": 648538004695.5809 } }, "kaala": "nishita", "days": [ { "local_date": "1990-07-20", "window": { "start": { "local": "1990-07-21T00:56:23+09:00", "utc": "1990-07-20T15:56:23Z", "ms": 648489382864.1526 }, "end": { "local": "1990-07-21T01:44:23+09:00", "utc": "1990-07-20T16:44:23Z", "ms": 648492262864.1526 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-07-21", "window": { "start": { "local": "1990-07-22T00:56:26+09:00", "utc": "1990-07-21T15:56:26Z", "ms": 648575786280.7909 }, "end": { "local": "1990-07-22T01:44:26+09:00", "utc": "1990-07-21T16:44:26Z", "ms": 648578666280.7909 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 17:16 on Fri 20 Jul to 14:27 on Sat 21 Jul.", "fact": "1990-07-20T08:15:32Z → 1990-07-21T05:26:45Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:56–01:44 on the 20th, 00:56–01:44 on the 21st.", "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 20th and 0 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 27650 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Friday 20 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": "1990-07-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-20", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Friday 20 July. Caturdaśī runs from 17:16 on Fri 20 Jul to 14:27 on Sat 21 Jul and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-07-20", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/madhusrava-tritiya", "festival": "madhusrava-tritiya", "name": "Madhusravā Tṛtīyā", "everyday": "Hariyali Teej", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17234, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-07-24T08:09:00+09:00", "utc": "1990-07-23T23:09:00Z", "ms": 648774540386.6461 }, "end": { "local": "1990-07-25T07:09:20+09:00", "utc": "1990-07-24T22:09:20Z", "ms": 648857359946.9169 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-24T08:09:00+09:00", "utc": "1990-07-23T23:09:00Z", "ms": 648774540386.6461 }, "end": { "local": "1990-07-25T07:09:20+09:00", "utc": "1990-07-24T22:09:20Z", "ms": 648857359946.9169 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-07-24", "window": { "start": { "local": "1990-07-24T12:56:14+09:00", "utc": "1990-07-24T03:56:14Z", "ms": 648791774090.4976 }, "end": { "local": "1990-07-24T13:44:14+09:00", "utc": "1990-07-24T04:44:14Z", "ms": 648794654090.4976 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-07-25", "window": { "start": { "local": "1990-07-25T12:56:15+09:00", "utc": "1990-07-25T03:56:15Z", "ms": 648878175043.1365 }, "end": { "local": "1990-07-25T13:44:15+09:00", "utc": "1990-07-25T04:44:15Z", "ms": 648881055043.1365 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 08:09 on Tue 24 Jul to 07:09 on Wed 25 Jul.", "fact": "1990-07-23T23:09:00Z → 1990-07-24T22:09:20Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:56–13:44 on the 24th, 12:56–13:44 on the 25th.", "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 24th and 0 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 17234 s" }, { "step": "ruling", "text": "Madhusravā Tṛtīyā, Lu’an, 1990: Tuesday 24 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": "1990-07-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-24", "confidence": "determinate" } ], "quote": "In Lu’an, Madhusravā Tṛtīyā (Hariyali Teej) 1990 falls on Tuesday 24 July. Tṛtīyā runs from 08:09 on Tue 24 Jul to 07:09 on Wed 25 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/madhusrava-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-07-25", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20815, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-07-25T07:09:20+09:00", "utc": "1990-07-24T22:09:20Z", "ms": 648857359946.9169 }, "end": { "local": "1990-07-26T06:51:02+09:00", "utc": "1990-07-25T21:51:02Z", "ms": 648942662457.7675 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-25T07:09:20+09:00", "utc": "1990-07-24T22:09:20Z", "ms": 648857359946.9169 }, "end": { "local": "1990-07-26T06:51:02+09:00", "utc": "1990-07-25T21:51:02Z", "ms": 648942662457.7675 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-07-25", "window": { "start": { "local": "1990-07-25T12:56:15+09:00", "utc": "1990-07-25T03:56:15Z", "ms": 648878175043.1365 }, "end": { "local": "1990-07-25T13:44:15+09:00", "utc": "1990-07-25T04:44:15Z", "ms": 648881055043.1365 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-07-26", "window": { "start": { "local": "1990-07-26T12:56:15+09:00", "utc": "1990-07-26T03:56:15Z", "ms": 648964575398.4229 }, "end": { "local": "1990-07-26T13:44:15+09:00", "utc": "1990-07-26T04:44:15Z", "ms": 648967455398.4229 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 07:09 on Wed 25 Jul to 06:51 on Thu 26 Jul.", "fact": "1990-07-24T22:09:20Z → 1990-07-25T21:51:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:56–13:44 on the 25th, 12:56–13:44 on the 26th.", "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 25th and 0 of 48 on the 26th.", "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 20815 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Wednesday 25 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": "1990-07-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-25", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Wednesday 25 July. Caturthī runs from 07:09 on Wed 25 Jul to 06:51 on Thu 26 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-07-25", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/naga-panchami", "festival": "naga-panchami", "name": "Nāga Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-07-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20445, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-07-26T06:51:02+09:00", "utc": "1990-07-25T21:51:02Z", "ms": 648942662457.7675 }, "end": { "local": "1990-07-27T07:15:30+09:00", "utc": "1990-07-26T22:15:30Z", "ms": 649030530409.8694 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-07-26T06:51:02+09:00", "utc": "1990-07-25T21:51:02Z", "ms": 648942662457.7675 }, "end": { "local": "1990-07-27T07:15:30+09:00", "utc": "1990-07-26T22:15:30Z", "ms": 649030530409.8694 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-07-26", "window": { "start": { "local": "1990-07-26T12:56:15+09:00", "utc": "1990-07-26T03:56:15Z", "ms": 648964575398.4229 }, "end": { "local": "1990-07-26T13:44:15+09:00", "utc": "1990-07-26T04:44:15Z", "ms": 648967455398.4229 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-07-27", "window": { "start": { "local": "1990-07-27T12:56:15+09:00", "utc": "1990-07-27T03:56:15Z", "ms": 649050975149.4788 }, "end": { "local": "1990-07-27T13:44:15+09:00", "utc": "1990-07-27T04:44:15Z", "ms": 649053855149.4788 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 06:51 on Thu 26 Jul to 07:16 on Fri 27 Jul.", "fact": "1990-07-25T21:51:02Z → 1990-07-26T22:15:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:56–13:44 on the 26th, 12:56–13:44 on the 27th.", "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 26th and 0 of 48 on the 27th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 20445 s" }, { "step": "ruling", "text": "Nāga Pañcamī, Lu’an, 1990: Thursday 26 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": "1990-07-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-07-26", "confidence": "determinate" } ], "quote": "In Lu’an, Nāga Pañcamī 1990 falls on Thursday 26 July. Pañcamī runs from 06:51 on Thu 26 Jul to 07:16 on Fri 27 Jul and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/naga-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-08-02", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37097, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-08-01T16:47:48+09:00", "utc": "1990-08-01T07:47:48Z", "ms": 649496867839.8202 }, "end": { "local": "1990-08-02T18:58:03+09:00", "utc": "1990-08-02T09:58:03Z", "ms": 649591082501.7478 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-08-01T16:47:48+09:00", "utc": "1990-08-01T07:47:48Z", "ms": 649496867839.8202 }, "end": { "local": "1990-08-02T18:58:03+09:00", "utc": "1990-08-02T09:58:03Z", "ms": 649591082501.7478 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-08-01", "window": { "start": { "local": "1990-08-01T06:29:31+09:00", "utc": "1990-07-31T21:29:31Z", "ms": 649459770837.715 }, "end": { "local": "1990-08-01T06:29:31+09:00", "utc": "1990-07-31T21:29:31Z", "ms": 649459770837.715 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-08-02", "window": { "start": { "local": "1990-08-02T06:30:10+09:00", "utc": "1990-08-01T21:30:10Z", "ms": 649546209868.3033 }, "end": { "local": "1990-08-02T06:30:10+09:00", "utc": "1990-08-01T21:30:10Z", "ms": 649546209868.3033 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 16:48 on Wed 1 Aug to 18:58 on Thu 2 Aug.", "fact": "1990-08-01T07:47:48Z → 1990-08-02T09:58:03Z" }, { "step": "kaala", "text": "Sunrise is at 06:30 on the 1st and 06:30 on the 2nd.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 1st and is on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 37097 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Lu’an, 1990: Thursday 2 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": "1990-08-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-02", "confidence": "determinate" } ], "quote": "In Lu’an, Putradā Ekādaśī 1990 falls on Thursday 2 August. Ekādaśī runs from 16:48 on Wed 1 Aug to 18:58 on Thu 2 Aug and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-08-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/damodara-dvadashi", "festival": "damodara-dvadashi", "name": "Dāmodara Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-03", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18842, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-08-02T18:58:03+09:00", "utc": "1990-08-02T09:58:03Z", "ms": 649591082501.7478 }, "end": { "local": "1990-08-03T20:47:38+09:00", "utc": "1990-08-03T11:47:38Z", "ms": 649684058243.8114 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-08-02T18:58:03+09:00", "utc": "1990-08-02T09:58:03Z", "ms": 649591082501.7478 }, "end": { "local": "1990-08-03T20:47:38+09:00", "utc": "1990-08-03T11:47:38Z", "ms": 649684058243.8114 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-02", "window": { "start": { "local": "1990-08-02T12:56:01+09:00", "utc": "1990-08-02T03:56:01Z", "ms": 649569360770.8203 }, "end": { "local": "1990-08-02T13:44:01+09:00", "utc": "1990-08-02T04:44:01Z", "ms": 649572240770.8203 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-03", "window": { "start": { "local": "1990-08-03T12:55:56+09:00", "utc": "1990-08-03T03:55:56Z", "ms": 649655756221.4602 }, "end": { "local": "1990-08-03T13:43:56+09:00", "utc": "1990-08-03T04:43:56Z", "ms": 649658636221.4602 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 18:58 on Thu 2 Aug to 20:48 on Fri 3 Aug.", "fact": "1990-08-02T09:58:03Z → 1990-08-03T11:47:38Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:56–13:44 on the 2nd, 12:56–13:44 on the 3rd.", "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 2nd and 48 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 18842 s" }, { "step": "ruling", "text": "Dāmodara Dvādaśī, Lu’an, 1990: Friday 3 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": "1990-08-03", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-03", "confidence": "determinate" } ], "quote": "In Lu’an, Dāmodara Dvādaśī 1990 falls on Friday 3 August. Dvādaśī runs from 18:58 on Thu 2 Aug to 20:48 on Fri 3 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/damodara-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-08-04", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-04", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 2300, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-08-03T20:47:38+09:00", "utc": "1990-08-03T11:47:38Z", "ms": 649684058243.8114 }, "end": { "local": "1990-08-04T22:09:45+09:00", "utc": "1990-08-04T13:09:45Z", "ms": 649775385004.9 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-08-03T20:47:38+09:00", "utc": "1990-08-03T11:47:38Z", "ms": 649684058243.8114 }, "end": { "local": "1990-08-04T22:09:45+09:00", "utc": "1990-08-04T13:09:45Z", "ms": 649775385004.9 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-08-03", "window": { "start": { "local": "1990-08-03T20:09:04+09:00", "utc": "1990-08-03T11:09:04Z", "ms": 649681743502.6167 }, "end": { "local": "1990-08-03T21:32:03+09:00", "utc": "1990-08-03T12:32:03Z", "ms": 649686722773.9482 } }, "covered_min": 44, "window_min": 83, "qualifies": true }, { "local_date": "1990-08-04", "window": { "start": { "local": "1990-08-04T20:08:14+09:00", "utc": "1990-08-04T11:08:14Z", "ms": 649768094087.1737 }, "end": { "local": "1990-08-04T21:31:25+09:00", "utc": "1990-08-04T12:31:25Z", "ms": 649773085161.6498 } }, "covered_min": 83, "window_min": 83, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:48 on Fri 3 Aug to 22:10 on Sat 4 Aug.", "fact": "1990-08-03T11:47:38Z → 1990-08-04T13:09:45Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 20:09–21:32 on the 3rd, 20:08–21:31 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 44 of 83 minutes on the 3rd and 83 of 83 on the 4th.", "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 2300 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Saturday 4 August.", "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": "1990-08-04", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-04", "confidence": "boundary" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Saturday 4 August. Trayodaśī runs from 20:48 on Fri 3 Aug to 22:10 on Sat 4 Aug and covers all of pradoṣa that evening. It also reaches the previous evening for 44 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-08-04", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/raksha-bandhana", "festival": "raksha-bandhana", "name": "Rakṣā Bandhana", "everyday": "Rakhi", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16876, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-08-05T23:00:40+09:00", "utc": "1990-08-05T14:00:40Z", "ms": 649864840032.1678 }, "end": { "local": "1990-08-06T23:19:25+09:00", "utc": "1990-08-06T14:19:25Z", "ms": 649952365426.728 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "second-half", "start": { "local": "1990-08-06T11:14:02+09:00", "utc": "1990-08-06T02:14:02Z", "ms": 649908842108.2242 }, "end": { "local": "1990-08-06T23:19:25+09:00", "utc": "1990-08-06T14:19:25Z", "ms": 649952365426.728 } }, "kaala": "day", "days": [ { "local_date": "1990-08-05", "window": { "start": { "local": "1990-08-05T06:32:07+09:00", "utc": "1990-08-04T21:32:07Z", "ms": 649805527145.7443 }, "end": { "local": "1990-08-06T06:32:46+09:00", "utc": "1990-08-05T21:32:46Z", "ms": 649891966251.9242 } }, "covered_min": 0, "window_min": 1441, "qualifies": false }, { "local_date": "1990-08-06", "window": { "start": { "local": "1990-08-06T06:32:46+09:00", "utc": "1990-08-05T21:32:46Z", "ms": 649891966251.9242 }, "end": { "local": "1990-08-07T06:33:25+09:00", "utc": "1990-08-06T21:33:25Z", "ms": 649978405344.9965 } }, "covered_min": 725, "window_min": 1441, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 23:01 on Sun 5 Aug to 23:19 on Mon 6 Aug. Its second half begins at 11:14 on Mon 6 Aug.", "fact": "1990-08-05T14:00:40Z → 1990-08-06T14:19:25Z · second half from 1990-08-06T02:14:02Z" }, { "step": "kaala", "text": "The day runs from sunrise to the next sunrise: from 06:32 on the 5th, and from 06:33 on the 6th.", "fact": "day: sunrise-to-sunrise · sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "The second half of Pūrṇimā must be present during the day. It covers 0 of 1441 minutes on the 5th and 725 of 1441 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one day qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 16876 s" }, { "step": "ruling", "text": "Rakṣā Bandhana, Lu’an, 1990: Monday 6 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "raksha-bandhana", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Rakhi purnima, Naroli purnima (Cocoanut day), Raksa Bandhana (in the second half of purnima), Rsi tarpana (madhyahna vyapini), Hayagriva utpatti, Jhulanayatra samapana" } ], "kaala": "day", "priority": "unstated", "when_absent": "unstated", "half": "second" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-08-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-06", "confidence": "determinate" } ], "quote": "In Lu’an, Rakṣā Bandhana (Rakhi) 1990 falls on Monday 6 August. The second half of Pūrṇimā runs from 11:14 on Mon 6 Aug to 23:19 on Mon 6 Aug and lies within that day, sunrise to sunrise.", "cite": "https://ahargana.org/lu-an/festivals/1990/raksha-bandhana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rishi-tarpana", "festival": "rishi-tarpana", "name": "Ṛṣi Tarpaṇa", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-06", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33415, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-08-05T23:00:40+09:00", "utc": "1990-08-05T14:00:40Z", "ms": 649864840032.1678 }, "end": { "local": "1990-08-06T23:19:25+09:00", "utc": "1990-08-06T14:19:25Z", "ms": 649952365426.728 }, "month": { "amanta": 4, "purnimanta": 4, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Śrāvaṇa" } }, "span": { "of": "tithi", "start": { "local": "1990-08-05T23:00:40+09:00", "utc": "1990-08-05T14:00:40Z", "ms": 649864840032.1678 }, "end": { "local": "1990-08-06T23:19:25+09:00", "utc": "1990-08-06T14:19:25Z", "ms": 649952365426.728 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-05", "window": { "start": { "local": "1990-08-05T12:55:45+09:00", "utc": "1990-08-05T03:55:45Z", "ms": 649828545298.2434 }, "end": { "local": "1990-08-05T13:43:45+09:00", "utc": "1990-08-05T04:43:45Z", "ms": 649831425298.2434 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-06", "window": { "start": { "local": "1990-08-06T12:55:39+09:00", "utc": "1990-08-06T03:55:39Z", "ms": 649914938934.7844 }, "end": { "local": "1990-08-06T13:43:39+09:00", "utc": "1990-08-06T04:43:39Z", "ms": 649917818934.7844 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 23:01 on Sun 5 Aug to 23:19 on Mon 6 Aug.", "fact": "1990-08-05T14:00:40Z → 1990-08-06T14:19:25Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:56–13:44 on the 5th, 12:56–13:44 on the 6th.", "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 5th and 48 of 48 on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 33415 s" }, { "step": "ruling", "text": "Ṛṣi Tarpaṇa, Lu’an, 1990: Monday 6 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": "1990-08-06", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-06", "confidence": "determinate" } ], "quote": "In Lu’an, Ṛṣi Tarpaṇa 1990 falls on Monday 6 August. Pūrṇimā runs from 23:01 on Sun 5 Aug to 23:19 on Mon 6 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/rishi-tarpana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ashunya-shayana-vrata", "festival": "ashunya-shayana-vrata", "name": "Aśūnya Śayana Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5121, "anga": { "type": "tithi", "index": 16, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1990-08-07T23:07:10+09:00", "utc": "1990-08-07T14:07:10Z", "ms": 650038030074.2155 }, "end": { "local": "1990-08-08T22:26:28+09:00", "utc": "1990-08-08T13:26:28Z", "ms": 650121988492.6273 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-07T23:07:10+09:00", "utc": "1990-08-07T14:07:10Z", "ms": 650038030074.2155 }, "end": { "local": "1990-08-08T22:26:28+09:00", "utc": "1990-08-08T13:26:28Z", "ms": 650121988492.6273 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-08-07", "window": { "start": { "local": "1990-08-07T20:30:25+09:00", "utc": "1990-08-07T11:30:25Z", "ms": 650028625062.186 }, "end": { "local": "1990-08-07T20:30:25+09:00", "utc": "1990-08-07T11:30:25Z", "ms": 650028625062.186 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-08-08", "window": { "start": { "local": "1990-08-08T21:01:07+09:00", "utc": "1990-08-08T12:01:07Z", "ms": 650116867343.8706 }, "end": { "local": "1990-08-08T21:01:07+09:00", "utc": "1990-08-08T12:01:07Z", "ms": 650116867343.8706 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 23:07 on Tue 7 Aug to 22:26 on Wed 8 Aug.", "fact": "1990-08-07T14:07:10Z → 1990-08-08T13:26:28Z" }, { "step": "kaala", "text": "Moonrise is at 20:30 on the 7th and 21:01 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. 103" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 5121 s" }, { "step": "ruling", "text": "Aśūnya Śayana Vrata, Lu’an, 1990: Wednesday 8 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": "1990-08-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-08", "confidence": "determinate" } ], "quote": "In Lu’an, Aśūnya Śayana Vrata 1990 falls on Wednesday 8 August. Dvitīyā runs from 23:07 on Tue 7 Aug to 22:26 on Wed 8 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ashunya-shayana-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/kajjali-tritiya", "festival": "kajjali-tritiya", "name": "Kajjalī Tṛtīyā", "everyday": "Kajari Teej", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 27448, "anga": { "type": "tithi", "index": 17, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-08-08T22:26:28+09:00", "utc": "1990-08-08T13:26:28Z", "ms": 650121988492.6273 }, "end": { "local": "1990-08-09T21:20:44+09:00", "utc": "1990-08-09T12:20:44Z", "ms": 650204444373.5061 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-08T22:26:28+09:00", "utc": "1990-08-08T13:26:28Z", "ms": 650121988492.6273 }, "end": { "local": "1990-08-09T21:20:44+09:00", "utc": "1990-08-09T12:20:44Z", "ms": 650204444373.5061 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-08", "window": { "start": { "local": "1990-08-08T12:55:24+09:00", "utc": "1990-08-08T03:55:24Z", "ms": 650087724438.2776 }, "end": { "local": "1990-08-08T13:43:24+09:00", "utc": "1990-08-08T04:43:24Z", "ms": 650090604438.2776 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-09", "window": { "start": { "local": "1990-08-09T12:55:16+09:00", "utc": "1990-08-09T03:55:16Z", "ms": 650174116321.7671 }, "end": { "local": "1990-08-09T13:43:16+09:00", "utc": "1990-08-09T04:43:16Z", "ms": 650176996321.7671 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 22:26 on Wed 8 Aug to 21:21 on Thu 9 Aug.", "fact": "1990-08-08T13:26:28Z → 1990-08-09T12:20:44Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:55–13:43 on the 8th, 12:55–13:43 on the 9th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 8th and 48 of 48 on the 9th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 27448 s" }, { "step": "ruling", "text": "Kajjalī Tṛtīyā, Lu’an, 1990: Thursday 9 August.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "kajjali-tritiya", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 3 Kajjali trtiya, (paraviddha), Angaveta trtiya (Orissa)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-08-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-09", "confidence": "determinate" } ], "quote": "In Lu’an, Kajjalī Tṛtīyā (Kajari Teej) 1990 falls on Thursday 9 August. Tṛtīyā runs from 22:26 on Wed 8 Aug to 21:21 on Thu 9 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/kajjali-tritiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-08-09", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-09", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 621, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-08-09T21:20:44+09:00", "utc": "1990-08-09T12:20:44Z", "ms": 650204444373.5061 }, "end": { "local": "1990-08-10T19:53:42+09:00", "utc": "1990-08-10T10:53:42Z", "ms": 650285622342.066 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-09T21:20:44+09:00", "utc": "1990-08-09T12:20:44Z", "ms": 650204444373.5061 }, "end": { "local": "1990-08-10T19:53:42+09:00", "utc": "1990-08-10T10:53:42Z", "ms": 650285622342.066 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-08-09", "window": { "start": { "local": "1990-08-09T21:31:05+09:00", "utc": "1990-08-09T12:31:05Z", "ms": 650205065435.7354 }, "end": { "local": "1990-08-09T21:31:05+09:00", "utc": "1990-08-09T12:31:05Z", "ms": 650205065435.7354 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-08-10", "window": { "start": { "local": "1990-08-10T22:01:43+09:00", "utc": "1990-08-10T13:01:43Z", "ms": 650293303022.2084 }, "end": { "local": "1990-08-10T22:01:43+09:00", "utc": "1990-08-10T13:01:43Z", "ms": 650293303022.2084 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:21 on Thu 9 Aug to 19:54 on Fri 10 Aug.", "fact": "1990-08-09T12:20:44Z → 1990-08-10T10:53:42Z" }, { "step": "kaala", "text": "Moonrise is at 21:31 on the 9th and 22:02 on the 10th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī 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. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 621 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Thursday 9 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": "1990-08-09", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-09", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Thursday 9 August. Caturthī runs from 21:21 on Thu 9 Aug to 19:54 on Fri 10 Aug and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-08-09", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/bahula-chaturthi", "festival": "bahula-chaturthi", "name": "Bahulā Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-10", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 550, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-08-09T21:20:44+09:00", "utc": "1990-08-09T12:20:44Z", "ms": 650204444373.5061 }, "end": { "local": "1990-08-10T19:53:42+09:00", "utc": "1990-08-10T10:53:42Z", "ms": 650285622342.066 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-09T21:20:44+09:00", "utc": "1990-08-09T12:20:44Z", "ms": 650204444373.5061 }, "end": { "local": "1990-08-10T19:53:42+09:00", "utc": "1990-08-10T10:53:42Z", "ms": 650285622342.066 } }, "kaala": "sayahna", "days": [ { "local_date": "1990-08-09", "window": { "start": { "local": "1990-08-09T17:22:00+09:00", "utc": "1990-08-09T08:22:00Z", "ms": 650190120041.8868 }, "end": { "local": "1990-08-09T20:03:49+09:00", "utc": "1990-08-09T11:03:49Z", "ms": 650199829188.6334 } }, "covered_min": 0, "window_min": 162, "qualifies": false }, { "local_date": "1990-08-10", "window": { "start": { "local": "1990-08-10T17:21:23+09:00", "utc": "1990-08-10T08:21:23Z", "ms": 650276482748.0615 }, "end": { "local": "1990-08-10T20:02:53+09:00", "utc": "1990-08-10T11:02:53Z", "ms": 650286172820.9735 } }, "covered_min": 152, "window_min": 162, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 21:21 on Thu 9 Aug to 19:54 on Fri 10 Aug.", "fact": "1990-08-09T12:20:44Z → 1990-08-10T10:53:42Z" }, { "step": "kaala", "text": "Sāyāhna is last 3 of 15 day muhūrtas: 17:22–20:04 on the 9th, 17:21–20:03 on the 10th.", "fact": "sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during sāyāhna. It covers 0 of 162 minutes on the 9th and 152 of 162 on the 10th.", "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 550 s" }, { "step": "ruling", "text": "Bahulā Caturthī, Lu’an, 1990: Friday 10 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": "1990-08-10", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-10", "confidence": "determinate" } ], "quote": "In Lu’an, Bahulā Caturthī 1990 falls on Friday 10 August. Caturthī runs from 21:21 on Thu 9 Aug to 19:54 on Fri 10 Aug and covers 152 of 162 minutes of sāyāhna that late afternoon.", "cite": "https://ahargana.org/lu-an/festivals/1990/bahula-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/hala-shashthi", "festival": "hala-shashthi", "name": "Hala Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8873, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-08-11T18:09:09+09:00", "utc": "1990-08-11T09:09:09Z", "ms": 650365748783.7166 }, "end": { "local": "1990-08-12T16:10:41+09:00", "utc": "1990-08-12T07:10:41Z", "ms": 650445041259.1205 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-11T18:09:09+09:00", "utc": "1990-08-11T09:09:09Z", "ms": 650365748783.7166 }, "end": { "local": "1990-08-12T16:10:41+09:00", "utc": "1990-08-12T07:10:41Z", "ms": 650445041259.1205 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-11", "window": { "start": { "local": "1990-08-11T12:54:58+09:00", "utc": "1990-08-11T03:54:58Z", "ms": 650346898398.8577 }, "end": { "local": "1990-08-11T13:42:58+09:00", "utc": "1990-08-11T04:42:58Z", "ms": 650349778398.8577 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-12", "window": { "start": { "local": "1990-08-12T12:54:49+09:00", "utc": "1990-08-12T03:54:49Z", "ms": 650433288612.2083 }, "end": { "local": "1990-08-12T13:42:49+09:00", "utc": "1990-08-12T04:42:49Z", "ms": 650436168612.2083 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 18:09 on Sat 11 Aug to 16:11 on Sun 12 Aug.", "fact": "1990-08-11T09:09:09Z → 1990-08-12T07:10:41Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:55–13:43 on the 11th, 12:55–13:43 on the 12th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 0 of 48 minutes on the 11th and 48 of 48 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 8873 s" }, { "step": "ruling", "text": "Hala Ṣaṣṭhī, Lu’an, 1990: Sunday 12 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": "1990-08-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-12", "confidence": "determinate" } ], "quote": "In Lu’an, Hala Ṣaṣṭhī 1990 falls on Sunday 12 August. Ṣaṣṭhī runs from 18:09 on Sat 11 Aug to 16:11 on Sun 12 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/hala-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/janmashtami", "festival": "janmashtami", "name": "Janmāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 36160, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-08-13T14:01:45+09:00", "utc": "1990-08-13T05:01:45Z", "ms": 650523705443.7318 }, "end": { "local": "1990-08-14T11:45:38+09:00", "utc": "1990-08-14T02:45:38Z", "ms": 650601938180.9043 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-13T14:01:45+09:00", "utc": "1990-08-13T05:01:45Z", "ms": 650523705443.7318 }, "end": { "local": "1990-08-14T11:45:38+09:00", "utc": "1990-08-14T02:45:38Z", "ms": 650601938180.9043 } }, "kaala": "nishita", "days": [ { "local_date": "1990-08-12", "window": { "start": { "local": "1990-08-13T00:55:08+09:00", "utc": "1990-08-12T15:55:08Z", "ms": 650476508036.7957 }, "end": { "local": "1990-08-13T01:43:08+09:00", "utc": "1990-08-12T16:43:08Z", "ms": 650479388036.7957 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-13", "window": { "start": { "local": "1990-08-14T00:54:58+09:00", "utc": "1990-08-13T15:54:58Z", "ms": 650562897681.0862 }, "end": { "local": "1990-08-14T01:42:58+09:00", "utc": "1990-08-13T16:42:58Z", "ms": 650565777681.0862 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 14:02 on Mon 13 Aug to 11:46 on Tue 14 Aug.", "fact": "1990-08-13T05:01:45Z → 1990-08-14T02:45:38Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:55–01:43 on the 12th, 00:55–01:43 on the 13th.", "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 12th and 48 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 36160 s" }, { "step": "ruling", "text": "Janmāṣṭamī, Lu’an, 1990: Monday 13 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": "1990-08-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-13", "confidence": "determinate" } ], "quote": "In Lu’an, Janmāṣṭamī 1990 falls on Monday 13 August. Aṣṭamī runs from 14:02 on Mon 13 Aug to 11:46 on Tue 14 Aug and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/janmashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shitala-saptami", "festival": "shitala-saptami", "name": "Śītalā Saptamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1147, "anga": { "type": "tithi", "index": 21, "key": "saptami", "name": "Saptamī", "start": { "local": "1990-08-12T16:10:41+09:00", "utc": "1990-08-12T07:10:41Z", "ms": 650445041259.1205 }, "end": { "local": "1990-08-13T14:01:45+09:00", "utc": "1990-08-13T05:01:45Z", "ms": 650523705443.7318 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-12T16:10:41+09:00", "utc": "1990-08-12T07:10:41Z", "ms": 650445041259.1205 }, "end": { "local": "1990-08-13T14:01:45+09:00", "utc": "1990-08-13T05:01:45Z", "ms": 650523705443.7318 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-12", "window": { "start": { "local": "1990-08-12T12:54:49+09:00", "utc": "1990-08-12T03:54:49Z", "ms": 650433288612.2083 }, "end": { "local": "1990-08-12T13:42:49+09:00", "utc": "1990-08-12T04:42:49Z", "ms": 650436168612.2083 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-13", "window": { "start": { "local": "1990-08-13T12:54:38+09:00", "utc": "1990-08-13T03:54:38Z", "ms": 650519678288.561 }, "end": { "local": "1990-08-13T13:42:38+09:00", "utc": "1990-08-13T04:42:38Z", "ms": 650522558288.561 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 16:11 on Sun 12 Aug to 14:02 on Mon 13 Aug.", "fact": "1990-08-12T07:10:41Z → 1990-08-13T05:01:45Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:55–13:43 on the 12th, 12:55–13:43 on the 13th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 0 of 48 minutes on the 12th and 48 of 48 on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 1147 s" }, { "step": "ruling", "text": "Śītalā Saptamī, Lu’an, 1990: Monday 13 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": "1990-08-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-13", "confidence": "determinate" } ], "quote": "In Lu’an, Śītalā Saptamī 1990 falls on Monday 13 August. Saptamī runs from 16:11 on Sun 12 Aug to 14:02 on Mon 13 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/shitala-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-08-16", "festival": "ekadashi", "name": "Ajā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1544, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-08-16T07:04:59+09:00", "utc": "1990-08-15T22:04:59Z", "ms": 650757899382.4596 }, "end": { "local": "1990-08-17T04:47:34+09:00", "utc": "1990-08-16T19:47:34Z", "ms": 650836053536.863 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-16T07:04:59+09:00", "utc": "1990-08-15T22:04:59Z", "ms": 650757899382.4596 }, "end": { "local": "1990-08-17T04:47:34+09:00", "utc": "1990-08-16T19:47:34Z", "ms": 650836053536.863 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-08-16", "window": { "start": { "local": "1990-08-16T06:39:15+09:00", "utc": "1990-08-15T21:39:15Z", "ms": 650756355300.2476 }, "end": { "local": "1990-08-16T06:39:15+09:00", "utc": "1990-08-15T21:39:15Z", "ms": 650756355300.2476 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-08-17", "window": { "start": { "local": "1990-08-17T06:39:54+09:00", "utc": "1990-08-16T21:39:54Z", "ms": 650842793843.9333 }, "end": { "local": "1990-08-17T06:39:54+09:00", "utc": "1990-08-16T21:39:54Z", "ms": 650842793843.9333 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 07:05 on Thu 16 Aug to 04:48 on Fri 17 Aug.", "fact": "1990-08-15T22:04:59Z → 1990-08-16T19:47:34Z" }, { "step": "kaala", "text": "Sunrise is at 06:39 on the 16th and 06:40 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 not on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Neither sunrise qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 1544 s" }, { "step": "ruling", "text": "Ajā Ekādaśī, Lu’an, 1990: Thursday 16 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": "1990-08-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-16", "confidence": "determinate" } ], "quote": "In Lu’an, Ajā Ekādaśī 1990 falls on Thursday 16 August. Ekādaśī runs from 07:05 on Thu 16 Aug to 04:48 on Fri 17 Aug, and is current at sunrise on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-08-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-08-18", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11894, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-08-18T02:37:25+09:00", "utc": "1990-08-17T17:37:25Z", "ms": 650914645151.7915 }, "end": { "local": "1990-08-19T00:39:11+09:00", "utc": "1990-08-18T15:39:11Z", "ms": 650993951397.2246 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-18T02:37:25+09:00", "utc": "1990-08-17T17:37:25Z", "ms": 650914645151.7915 }, "end": { "local": "1990-08-19T00:39:11+09:00", "utc": "1990-08-18T15:39:11Z", "ms": 650993951397.2246 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-08-17", "window": { "start": { "local": "1990-08-17T19:55:50+09:00", "utc": "1990-08-17T10:55:50Z", "ms": 650890549763.6885 }, "end": { "local": "1990-08-17T21:21:47+09:00", "utc": "1990-08-17T12:21:47Z", "ms": 650895707433.7211 } }, "covered_min": 0, "window_min": 86, "qualifies": false }, { "local_date": "1990-08-18", "window": { "start": { "local": "1990-08-18T19:54:46+09:00", "utc": "1990-08-18T10:54:46Z", "ms": 650976885560.519 }, "end": { "local": "1990-08-18T21:20:57+09:00", "utc": "1990-08-18T12:20:57Z", "ms": 650982056902.5757 } }, "covered_min": 86, "window_min": 86, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:37 on Sat 18 Aug to 00:39 on Sun 19 Aug.", "fact": "1990-08-17T17:37:25Z → 1990-08-18T15:39:11Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:56–21:22 on the 17th, 19:55–21:21 on the 18th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 86 minutes on the 17th and 86 of 86 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11894 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Saturday 18 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": "1990-08-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-18", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Saturday 18 August. Trayodaśī runs from 02:37 on Sat 18 Aug to 00:39 on Sun 19 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-08-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-08-18", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 887, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-08-19T00:39:11+09:00", "utc": "1990-08-18T15:39:11Z", "ms": 650993951397.2246 }, "end": { "local": "1990-08-19T22:57:56+09:00", "utc": "1990-08-19T13:57:56Z", "ms": 651074276293.3035 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-19T00:39:11+09:00", "utc": "1990-08-18T15:39:11Z", "ms": 650993951397.2246 }, "end": { "local": "1990-08-19T22:57:56+09:00", "utc": "1990-08-19T13:57:56Z", "ms": 651074276293.3035 } }, "kaala": "nishita", "days": [ { "local_date": "1990-08-18", "window": { "start": { "local": "1990-08-19T00:53:58+09:00", "utc": "1990-08-18T15:53:58Z", "ms": 650994838093.2314 }, "end": { "local": "1990-08-19T01:41:58+09:00", "utc": "1990-08-18T16:41:58Z", "ms": 650997718093.2314 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-08-19", "window": { "start": { "local": "1990-08-20T00:53:45+09:00", "utc": "1990-08-19T15:53:45Z", "ms": 651081224666.8275 }, "end": { "local": "1990-08-20T01:41:45+09:00", "utc": "1990-08-19T16:41:45Z", "ms": 651084104666.8275 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 00:39 on Sun 19 Aug to 22:58 on Sun 19 Aug.", "fact": "1990-08-18T15:39:11Z → 1990-08-19T13:57:56Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 00:54–01:42 on the 18th, 00:54–01:42 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 48 of 48 minutes on the 18th and 0 of 48 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 887 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Saturday 18 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": "1990-08-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-18", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Saturday 18 August. Caturdaśī runs from 00:39 on Sun 19 Aug to 22:58 on Sun 19 Aug and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-08-18", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/aghora-chaturdashi", "festival": "aghora-chaturdashi", "name": "Aghora Caturdaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5871, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-08-19T00:39:11+09:00", "utc": "1990-08-18T15:39:11Z", "ms": 650993951397.2246 }, "end": { "local": "1990-08-19T22:57:56+09:00", "utc": "1990-08-19T13:57:56Z", "ms": 651074276293.3035 }, "month": { "amanta": 4, "purnimanta": 5, "adhika": false, "amanta_name": "Śrāvaṇa", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-19T00:39:11+09:00", "utc": "1990-08-18T15:39:11Z", "ms": 650993951397.2246 }, "end": { "local": "1990-08-19T22:57:56+09:00", "utc": "1990-08-19T13:57:56Z", "ms": 651074276293.3035 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-08-18", "window": { "start": { "local": "1990-08-18T19:54:46+09:00", "utc": "1990-08-18T10:54:46Z", "ms": 650976885560.519 }, "end": { "local": "1990-08-18T21:20:57+09:00", "utc": "1990-08-18T12:20:57Z", "ms": 650982056902.5757 } }, "covered_min": 0, "window_min": 86, "qualifies": false }, { "local_date": "1990-08-19", "window": { "start": { "local": "1990-08-19T19:53:40+09:00", "utc": "1990-08-19T10:53:40Z", "ms": 651063220487.4817 }, "end": { "local": "1990-08-19T21:20:06+09:00", "utc": "1990-08-19T12:20:06Z", "ms": 651068405601.9739 } }, "covered_min": 86, "window_min": 86, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 00:39 on Sun 19 Aug to 22:58 on Sun 19 Aug.", "fact": "1990-08-18T15:39:11Z → 1990-08-19T13:57:56Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:55–21:21 on the 18th, 19:54–21:20 on the 19th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during pradoṣa. It covers 0 of 86 minutes on the 18th and 86 of 86 on the 19th.", "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 5871 s" }, { "step": "ruling", "text": "Aghora Caturdaśī, Lu’an, 1990: Sunday 19 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": "1990-08-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-19", "confidence": "determinate" } ], "quote": "In Lu’an, Aghora Caturdaśī 1990 falls on Sunday 19 August. Caturdaśī runs from 00:39 on Sun 19 Aug to 22:58 on Sun 19 Aug and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/aghora-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rudra-vrata", "festival": "rudra-vrata", "name": "Rudra Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25602, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1990-08-20T21:39:00+09:00", "utc": "1990-08-20T12:39:00Z", "ms": 651155940260.2747 }, "end": { "local": "1990-08-21T20:47:40+09:00", "utc": "1990-08-21T11:47:40Z", "ms": 651239259875.273 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-20T21:39:00+09:00", "utc": "1990-08-20T12:39:00Z", "ms": 651155940260.2747 }, "end": { "local": "1990-08-21T20:47:40+09:00", "utc": "1990-08-21T11:47:40Z", "ms": 651239259875.273 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-20", "window": { "start": { "local": "1990-08-20T12:53:12+09:00", "utc": "1990-08-20T03:53:12Z", "ms": 651124391706.7952 }, "end": { "local": "1990-08-20T13:41:12+09:00", "utc": "1990-08-20T04:41:12Z", "ms": 651127271706.7952 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-21", "window": { "start": { "local": "1990-08-21T12:52:57+09:00", "utc": "1990-08-21T03:52:57Z", "ms": 651210777382.4966 }, "end": { "local": "1990-08-21T13:40:57+09:00", "utc": "1990-08-21T04:40:57Z", "ms": 651213657382.4966 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 21:39 on Mon 20 Aug to 20:48 on Tue 21 Aug.", "fact": "1990-08-20T12:39:00Z → 1990-08-21T11:47:40Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:53–13:41 on the 20th, 12:53–13:41 on the 21st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during madhyāhna. It covers 0 of 48 minutes on the 20th and 48 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 25602 s" }, { "step": "ruling", "text": "Rudra Vrata, Lu’an, 1990: Tuesday 21 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": "1990-08-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-21", "confidence": "determinate" } ], "quote": "In Lu’an, Rudra Vrata 1990 falls on Tuesday 21 August. Pratipadā runs from 21:39 on Mon 20 Aug to 20:48 on Tue 21 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/rudra-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/haritalika-vrata", "festival": "haritalika-vrata", "name": "Haritālikā Vrata", "everyday": "Hartalika Teej", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 24474, "anga": { "type": "tithi", "index": 2, "key": "tritiya", "name": "Tṛtīyā", "start": { "local": "1990-08-22T20:28:36+09:00", "utc": "1990-08-22T11:28:36Z", "ms": 651324516204.0571 }, "end": { "local": "1990-08-23T20:45:11+09:00", "utc": "1990-08-23T11:45:11Z", "ms": 651411911296.549 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-22T20:28:36+09:00", "utc": "1990-08-22T11:28:36Z", "ms": 651324516204.0571 }, "end": { "local": "1990-08-23T20:45:11+09:00", "utc": "1990-08-23T11:45:11Z", "ms": 651411911296.549 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-22", "window": { "start": { "local": "1990-08-22T12:52:43+09:00", "utc": "1990-08-22T03:52:43Z", "ms": 651297162592.1309 }, "end": { "local": "1990-08-22T13:40:43+09:00", "utc": "1990-08-22T04:40:43Z", "ms": 651300042592.1309 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-23", "window": { "start": { "local": "1990-08-23T12:52:27+09:00", "utc": "1990-08-23T03:52:27Z", "ms": 651383547344.9877 }, "end": { "local": "1990-08-23T13:40:27+09:00", "utc": "1990-08-23T04:40:27Z", "ms": 651386427344.9877 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Tṛtīyā runs from 20:29 on Wed 22 Aug to 20:45 on Thu 23 Aug.", "fact": "1990-08-22T11:28:36Z → 1990-08-23T11:45:11Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:53–13:41 on the 22nd, 12:52–13:40 on the 23rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Tṛtīyā must be present during madhyāhna. It covers 0 of 48 minutes on the 22nd and 48 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 24474 s" }, { "step": "ruling", "text": "Haritālikā Vrata, Lu’an, 1990: Thursday 23 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": "1990-08-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-23", "confidence": "determinate" } ], "quote": "In Lu’an, Haritālikā Vrata (Hartalika Teej) 1990 falls on Thursday 23 August. Tṛtīyā runs from 20:29 on Wed 22 Aug to 20:45 on Thu 23 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/haritalika-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ganesha-chaturthi", "festival": "ganesha-chaturthi", "name": "Gaṇeśa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25484, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-08-23T20:45:11+09:00", "utc": "1990-08-23T11:45:11Z", "ms": 651411911296.549 }, "end": { "local": "1990-08-24T21:38:36+09:00", "utc": "1990-08-24T12:38:36Z", "ms": 651501515550.2441 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-23T20:45:11+09:00", "utc": "1990-08-23T11:45:11Z", "ms": 651411911296.549 }, "end": { "local": "1990-08-24T21:38:36+09:00", "utc": "1990-08-24T12:38:36Z", "ms": 651501515550.2441 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-23", "window": { "start": { "local": "1990-08-23T12:52:27+09:00", "utc": "1990-08-23T03:52:27Z", "ms": 651383547344.9877 }, "end": { "local": "1990-08-23T13:40:27+09:00", "utc": "1990-08-23T04:40:27Z", "ms": 651386427344.9877 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-24", "window": { "start": { "local": "1990-08-24T12:52:12+09:00", "utc": "1990-08-24T03:52:12Z", "ms": 651469931651.4115 }, "end": { "local": "1990-08-24T13:40:12+09:00", "utc": "1990-08-24T04:40:12Z", "ms": 651472811651.4115 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 20:45 on Thu 23 Aug to 21:39 on Fri 24 Aug.", "fact": "1990-08-23T11:45:11Z → 1990-08-24T12:38:36Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:52–13:40 on the 23rd, 12:52–13:40 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 23rd and 48 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 25484 s" }, { "step": "ruling", "text": "Gaṇeśa Caturthī, Lu’an, 1990: Friday 24 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": "1990-08-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-24", "confidence": "determinate" } ], "quote": "In Lu’an, Gaṇeśa Caturthī 1990 falls on Friday 24 August. Caturthī runs from 20:45 on Thu 23 Aug to 21:39 on Fri 24 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/ganesha-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rishi-panchami", "festival": "rishi-panchami", "name": "Ṛṣi Pañcamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-25", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 28704, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-08-24T21:38:36+09:00", "utc": "1990-08-24T12:38:36Z", "ms": 651501515550.2441 }, "end": { "local": "1990-08-25T23:06:54+09:00", "utc": "1990-08-25T14:06:54Z", "ms": 651593214229.0625 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-24T21:38:36+09:00", "utc": "1990-08-24T12:38:36Z", "ms": 651501515550.2441 }, "end": { "local": "1990-08-25T23:06:54+09:00", "utc": "1990-08-25T14:06:54Z", "ms": 651593214229.0625 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-24", "window": { "start": { "local": "1990-08-24T12:52:12+09:00", "utc": "1990-08-24T03:52:12Z", "ms": 651469931651.4115 }, "end": { "local": "1990-08-24T13:40:12+09:00", "utc": "1990-08-24T04:40:12Z", "ms": 651472811651.4115 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-25", "window": { "start": { "local": "1990-08-25T12:51:56+09:00", "utc": "1990-08-25T03:51:56Z", "ms": 651556315522.7957 }, "end": { "local": "1990-08-25T13:39:56+09:00", "utc": "1990-08-25T04:39:56Z", "ms": 651559195522.7957 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 21:39 on Fri 24 Aug to 23:07 on Sat 25 Aug.", "fact": "1990-08-24T12:38:36Z → 1990-08-25T14:06:54Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:52–13:40 on the 24th, 12:52–13:40 on the 25th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pañcamī must be present during madhyāhna. It covers 0 of 48 minutes on the 24th and 48 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: disputed → only-day · margin 28704 s" }, { "step": "ruling", "text": "Ṛṣi Pañcamī, Lu’an, 1990: Saturday 25 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": "1990-08-25", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-25", "confidence": "determinate" } ], "quote": "In Lu’an, Ṛṣi Pañcamī 1990 falls on Saturday 25 August. Pañcamī runs from 21:39 on Fri 24 Aug to 23:07 on Sat 25 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/rishi-panchami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/surya-shashthi-bhadrapada", "festival": "surya-shashthi-bhadrapada", "name": "Sūrya Ṣaṣṭhī (Bhādrapada)", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34019, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-08-25T23:06:54+09:00", "utc": "1990-08-25T14:06:54Z", "ms": 651593214229.0625 }, "end": { "local": "1990-08-27T01:04:28+09:00", "utc": "1990-08-26T16:04:28Z", "ms": 651686668467.4788 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-25T23:06:54+09:00", "utc": "1990-08-25T14:06:54Z", "ms": 651593214229.0625 }, "end": { "local": "1990-08-27T01:04:28+09:00", "utc": "1990-08-26T16:04:28Z", "ms": 651686668467.4788 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-25", "window": { "start": { "local": "1990-08-25T12:51:56+09:00", "utc": "1990-08-25T03:51:56Z", "ms": 651556315522.7957 }, "end": { "local": "1990-08-25T13:39:56+09:00", "utc": "1990-08-25T04:39:56Z", "ms": 651559195522.7957 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-08-26", "window": { "start": { "local": "1990-08-26T12:51:39+09:00", "utc": "1990-08-26T03:51:39Z", "ms": 651642698971.5308 }, "end": { "local": "1990-08-26T13:39:39+09:00", "utc": "1990-08-26T04:39:39Z", "ms": 651645578971.5308 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 23:07 on Sat 25 Aug to 01:04 on Mon 27 Aug.", "fact": "1990-08-25T14:06:54Z → 1990-08-26T16:04:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:52–13:40 on the 25th, 12:52–13:40 on the 26th.", "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 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: paraviddha → only-day · margin 34019 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī (Bhādrapada), Lu’an, 1990: Sunday 26 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": "1990-08-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-26", "confidence": "determinate" } ], "quote": "In Lu’an, Sūrya Ṣaṣṭhī (Bhādrapada) 1990 falls on Sunday 26 August. Ṣaṣṭhī runs from 23:07 on Sat 25 Aug to 01:04 on Mon 27 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/surya-shashthi-bhadrapada", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/muktabharana-vrata", "festival": "muktabharana-vrata", "name": "Muktābharaṇa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34154, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1990-08-27T01:04:28+09:00", "utc": "1990-08-26T16:04:28Z", "ms": 651686668467.4788 }, "end": { "local": "1990-08-28T03:21:51+09:00", "utc": "1990-08-27T18:21:51Z", "ms": 651781310664.754 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-27T01:04:28+09:00", "utc": "1990-08-26T16:04:28Z", "ms": 651686668467.4788 }, "end": { "local": "1990-08-28T03:21:51+09:00", "utc": "1990-08-27T18:21:51Z", "ms": 651781310664.754 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-27", "window": { "start": { "local": "1990-08-27T12:51:22+09:00", "utc": "1990-08-27T03:51:22Z", "ms": 651729082010.9326 }, "end": { "local": "1990-08-27T13:39:22+09:00", "utc": "1990-08-27T04:39:22Z", "ms": 651731962010.9326 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-08-28", "window": { "start": { "local": "1990-08-28T12:51:05+09:00", "utc": "1990-08-28T03:51:05Z", "ms": 651815464655.1724 }, "end": { "local": "1990-08-28T13:39:05+09:00", "utc": "1990-08-28T04:39:05Z", "ms": 651818344655.1724 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 01:04 on Mon 27 Aug to 03:22 on Tue 28 Aug.", "fact": "1990-08-26T16:04:28Z → 1990-08-27T18:21:51Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:51–13:39 on the 27th, 12:51–13:39 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 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: purvaviddha → only-day · margin 34154 s" }, { "step": "ruling", "text": "Muktābharaṇa Vrata, Lu’an, 1990: Monday 27 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": "1990-08-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-27", "confidence": "determinate" } ], "quote": "In Lu’an, Muktābharaṇa Vrata 1990 falls on Monday 27 August. Saptamī runs from 01:04 on Mon 27 Aug to 03:22 on Tue 28 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/muktabharana-vrata", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/radhashtami", "festival": "radhashtami", "name": "Rādhāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-08-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25457, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-08-28T03:21:51+09:00", "utc": "1990-08-27T18:21:51Z", "ms": 651781310664.754 }, "end": { "local": "1990-08-29T05:46:30+09:00", "utc": "1990-08-28T20:46:30Z", "ms": 651876390136.8197 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-28T03:21:51+09:00", "utc": "1990-08-27T18:21:51Z", "ms": 651781310664.754 }, "end": { "local": "1990-08-29T05:46:30+09:00", "utc": "1990-08-28T20:46:30Z", "ms": 651876390136.8197 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-08-28", "window": { "start": { "local": "1990-08-28T12:51:05+09:00", "utc": "1990-08-28T03:51:05Z", "ms": 651815464655.1724 }, "end": { "local": "1990-08-28T13:39:05+09:00", "utc": "1990-08-28T04:39:05Z", "ms": 651818344655.1724 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-08-29", "window": { "start": { "local": "1990-08-29T12:50:47+09:00", "utc": "1990-08-29T03:50:47Z", "ms": 651901846919.2197 }, "end": { "local": "1990-08-29T13:38:47+09:00", "utc": "1990-08-29T04:38:47Z", "ms": 651904726919.2197 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 03:22 on Tue 28 Aug to 05:47 on Wed 29 Aug.", "fact": "1990-08-27T18:21:51Z → 1990-08-28T20:46:30Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:51–13:39 on the 28th, 12:51–13:39 on the 29th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 28th and 0 of 48 on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25457 s" }, { "step": "ruling", "text": "Rādhāṣṭamī, Lu’an, 1990: Tuesday 28 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": "1990-08-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-08-28", "confidence": "determinate" } ], "quote": "In Lu’an, Rādhāṣṭamī 1990 falls on Tuesday 28 August. Aṣṭamī runs from 03:22 on Tue 28 Aug to 05:47 on Wed 29 Aug and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/radhashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-09-01", "festival": "ekadashi", "name": "Parivartanī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11624, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-08-31T10:02:25+09:00", "utc": "1990-08-31T01:02:25Z", "ms": 652064544719.7144 }, "end": { "local": "1990-09-01T11:29:26+09:00", "utc": "1990-09-01T02:29:26Z", "ms": 652156166430.5203 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-08-31T10:02:25+09:00", "utc": "1990-08-31T01:02:25Z", "ms": 652064544719.7144 }, "end": { "local": "1990-09-01T11:29:26+09:00", "utc": "1990-09-01T02:29:26Z", "ms": 652156166430.5203 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-08-31", "window": { "start": { "local": "1990-08-31T06:48:40+09:00", "utc": "1990-08-30T21:48:40Z", "ms": 652052920258.6422 }, "end": { "local": "1990-08-31T06:48:40+09:00", "utc": "1990-08-30T21:48:40Z", "ms": 652052920258.6422 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-09-01", "window": { "start": { "local": "1990-09-01T06:49:17+09:00", "utc": "1990-08-31T21:49:17Z", "ms": 652139356845.1504 }, "end": { "local": "1990-09-01T06:49:17+09:00", "utc": "1990-08-31T21:49:17Z", "ms": 652139356845.1504 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 10:02 on Fri 31 Aug to 11:29 on Sat 1 Sep.", "fact": "1990-08-31T01:02:25Z → 1990-09-01T02:29:26Z" }, { "step": "kaala", "text": "Sunrise is at 06:49 on the 31st and 06:49 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 11624 s" }, { "step": "ruling", "text": "Parivartanī Ekādaśī, Lu’an, 1990: Saturday 1 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": "1990-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-01", "confidence": "determinate" } ], "quote": "In Lu’an, Parivartanī Ekādaśī 1990 falls on Saturday 1 September. Ekādaśī runs from 10:02 on Fri 31 Aug to 11:29 on Sat 1 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-09-01", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vamana-jayanti", "festival": "vamana-jayanti", "name": "Vāmana Jayantī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-01", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1865, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-09-01T11:29:26+09:00", "utc": "1990-09-01T02:29:26Z", "ms": 652156166430.5203 }, "end": { "local": "1990-09-02T12:18:28+09:00", "utc": "1990-09-02T03:18:28Z", "ms": 652245507602.5452 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-09-01T11:29:26+09:00", "utc": "1990-09-01T02:29:26Z", "ms": 652156166430.5203 }, "end": { "local": "1990-09-02T12:18:28+09:00", "utc": "1990-09-02T03:18:28Z", "ms": 652245507602.5452 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-09-01", "window": { "start": { "local": "1990-09-01T12:49:52+09:00", "utc": "1990-09-01T03:49:52Z", "ms": 652160991591.4974 }, "end": { "local": "1990-09-01T13:37:52+09:00", "utc": "1990-09-01T04:37:52Z", "ms": 652163871591.4974 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-09-02", "window": { "start": { "local": "1990-09-02T12:49:33+09:00", "utc": "1990-09-02T03:49:33Z", "ms": 652247372500.2522 }, "end": { "local": "1990-09-02T13:37:33+09:00", "utc": "1990-09-02T04:37:33Z", "ms": 652250252500.2522 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 11:29 on Sat 1 Sep to 12:18 on Sun 2 Sep.", "fact": "1990-09-01T02:29:26Z → 1990-09-02T03:18:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 12:50–13:38 on the 1st, 12:50–13:38 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 48 of 48 minutes on the 1st and 0 of 48 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1865 s" }, { "step": "ruling", "text": "Vāmana Jayantī, Lu’an, 1990: Saturday 1 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "vamana-jayanti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Visnuparivartanotsava, Sakrotthana (in any of the naksatras U. Asadha, Sravana & Dhanistha), Kalki dvadasi, Sravana dvadasi (when combined with naksatra Sravana), Vamana jayanti (madhyahna vyapini)." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-09-01", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-01", "confidence": "boundary" } ], "quote": "In Lu’an, Vāmana Jayantī 1990 falls on Saturday 1 September. Dvādaśī runs from 11:29 on Sat 1 Sep to 12:18 on Sun 2 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vamana-jayanti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-09-02", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25768, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-09-02T12:18:28+09:00", "utc": "1990-09-02T03:18:28Z", "ms": 652245507602.5452 }, "end": { "local": "1990-09-03T12:26:29+09:00", "utc": "1990-09-03T03:26:29Z", "ms": 652332389037.9773 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-09-02T12:18:28+09:00", "utc": "1990-09-02T03:18:28Z", "ms": 652245507602.5452 }, "end": { "local": "1990-09-03T12:26:29+09:00", "utc": "1990-09-03T03:26:29Z", "ms": 652332389037.9773 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-09-02", "window": { "start": { "local": "1990-09-02T19:37:12+09:00", "utc": "1990-09-02T10:37:12Z", "ms": 652271831684.0455 }, "end": { "local": "1990-09-02T21:06:58+09:00", "utc": "1990-09-02T12:06:58Z", "ms": 652277218083.7037 } }, "covered_min": 90, "window_min": 90, "qualifies": true }, { "local_date": "1990-09-03", "window": { "start": { "local": "1990-09-03T19:35:57+09:00", "utc": "1990-09-03T10:35:57Z", "ms": 652358156549.389 }, "end": { "local": "1990-09-03T21:05:58+09:00", "utc": "1990-09-03T12:05:58Z", "ms": 652363557802.919 } }, "covered_min": 0, "window_min": 90, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 12:18 on Sun 2 Sep to 12:26 on Mon 3 Sep.", "fact": "1990-09-02T03:18:28Z → 1990-09-03T03:26:29Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:37–21:07 on the 2nd, 19:36–21:06 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 90 of 90 minutes on the 2nd and 0 of 90 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 25768 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Sunday 2 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": "1990-09-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-02", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Sunday 2 September. Trayodaśī runs from 12:18 on Sun 2 Sep to 12:26 on Mon 3 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-09-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ananta-chaturdashi", "festival": "ananta-chaturdashi", "name": "Ananta Caturdaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-04", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9028, "anga": { "type": "tithi", "index": 13, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-09-03T12:26:29+09:00", "utc": "1990-09-03T03:26:29Z", "ms": 652332389037.9773 }, "end": { "local": "1990-09-04T11:54:17+09:00", "utc": "1990-09-04T02:54:17Z", "ms": 652416857051.3411 }, "month": { "amanta": 5, "purnimanta": 5, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Bhādrapada" } }, "span": { "of": "tithi", "start": { "local": "1990-09-03T12:26:29+09:00", "utc": "1990-09-03T03:26:29Z", "ms": 652332389037.9773 }, "end": { "local": "1990-09-04T11:54:17+09:00", "utc": "1990-09-04T02:54:17Z", "ms": 652416857051.3411 } }, "kaala": "udaya-3", "days": [ { "local_date": "1990-09-03", "window": { "start": { "local": "1990-09-03T06:50:30+09:00", "utc": "1990-09-02T21:50:30Z", "ms": 652312229681.4819 }, "end": { "local": "1990-09-03T09:23:35+09:00", "utc": "1990-09-03T00:23:35Z", "ms": 652321415055.0634 } }, "covered_min": 0, "window_min": 153, "qualifies": false }, { "local_date": "1990-09-04", "window": { "start": { "local": "1990-09-04T06:51:06+09:00", "utc": "1990-09-03T21:51:06Z", "ms": 652398665950.8633 }, "end": { "local": "1990-09-04T09:23:49+09:00", "utc": "1990-09-04T00:23:49Z", "ms": 652407828953.2751 } }, "covered_min": 153, "window_min": 153, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 12:26 on Mon 3 Sep to 11:54 on Tue 4 Sep.", "fact": "1990-09-03T03:26:29Z → 1990-09-04T02:54:17Z" }, { "step": "kaala", "text": "The first three muhūrtas after sunrise is first 3 of 15 day muhūrtas: 06:50–09:24 on the 3rd, 06:51–09:24 on the 4th.", "fact": "udaya-3: day-muhurta-1-3 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must hold through the first three muhūrtas after sunrise. It covers 0 of 153 minutes on the 3rd and 153 of 153 on the 4th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one morning qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 9028 s" }, { "step": "ruling", "text": "Ananta Caturdaśī, Lu’an, 1990: Tuesday 4 September.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "ananta-chaturdashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 103", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 14 Ananta caturdasi (covering three muhurtas from sunrise, but one muhurta in Bengal)." } ], "not_evaluated": "In Bengal the row asks for one muhūrta from sunrise; that reading is not applied.", "kaala": "udaya-3", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-09-04", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-04", "confidence": "determinate" } ], "quote": "In Lu’an, Ananta Caturdaśī 1990 falls on Tuesday 4 September. Caturdaśī runs from 12:26 on Mon 3 Sep to 11:54 on Tue 4 Sep and covers all of the first three muhūrtas after sunrise that morning.", "cite": "https://ahargana.org/lu-an/festivals/1990/ananta-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-09-08", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-08", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18224, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-09-08T04:43:52+09:00", "utc": "1990-09-07T19:43:52Z", "ms": 652736631984.2787 }, "end": { "local": "1990-09-09T02:15:34+09:00", "utc": "1990-09-08T17:15:34Z", "ms": 652814133720.3688 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-08T04:43:52+09:00", "utc": "1990-09-07T19:43:52Z", "ms": 652736631984.2787 }, "end": { "local": "1990-09-09T02:15:34+09:00", "utc": "1990-09-08T17:15:34Z", "ms": 652814133720.3688 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-09-07", "window": { "start": { "local": "1990-09-07T20:35:40+09:00", "utc": "1990-09-07T11:35:40Z", "ms": 652707339784.5911 }, "end": { "local": "1990-09-07T20:35:40+09:00", "utc": "1990-09-07T11:35:40Z", "ms": 652707339784.5911 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-09-08", "window": { "start": { "local": "1990-09-08T21:11:50+09:00", "utc": "1990-09-08T12:11:50Z", "ms": 652795909869.8445 }, "end": { "local": "1990-09-08T21:11:50+09:00", "utc": "1990-09-08T12:11:50Z", "ms": 652795909869.8445 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 04:44 on Sat 8 Sep to 02:16 on Sun 9 Sep.", "fact": "1990-09-07T19:43:52Z → 1990-09-08T17:15:34Z" }, { "step": "kaala", "text": "Moonrise is at 20:36 on the 7th and 21:12 on the 8th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī 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. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 18224 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Saturday 8 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": "1990-09-08", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-08", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Saturday 8 September. Caturthī runs from 04:44 on Sat 8 Sep to 02:16 on Sun 9 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-09-08", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/chandra-shashthi", "festival": "chandra-shashthi", "name": "Candra Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-09", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 4993, "anga": { "type": "tithi", "index": 20, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-09-09T23:44:57+09:00", "utc": "1990-09-09T14:44:57Z", "ms": 652891497461.3494 }, "end": { "local": "1990-09-10T21:17:48+09:00", "utc": "1990-09-10T12:17:48Z", "ms": 652969067636.9248 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-09T23:44:57+09:00", "utc": "1990-09-09T14:44:57Z", "ms": 652891497461.3494 }, "end": { "local": "1990-09-10T21:17:48+09:00", "utc": "1990-09-10T12:17:48Z", "ms": 652969067636.9248 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-09-09", "window": { "start": { "local": "1990-09-09T21:53:05+09:00", "utc": "1990-09-09T12:53:05Z", "ms": 652884785491.3524 }, "end": { "local": "1990-09-09T21:53:05+09:00", "utc": "1990-09-09T12:53:05Z", "ms": 652884785491.3524 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-09-10", "window": { "start": { "local": "1990-09-10T22:41:01+09:00", "utc": "1990-09-10T13:41:01Z", "ms": 652974061124.729 }, "end": { "local": "1990-09-10T22:41:01+09:00", "utc": "1990-09-10T13:41:01Z", "ms": 652974061124.729 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 23:45 on Sun 9 Sep to 21:18 on Mon 10 Sep.", "fact": "1990-09-09T14:44:57Z → 1990-09-10T12:17:48Z" }, { "step": "kaala", "text": "Moonrise is at 21:53 on the 9th and 22:41 on the 10th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Ṣaṣṭhī must be current at moonrise. It is not on the 9th and is not on the 10th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Neither moonrise qualifies. The day the tithi falls on is taken.", "fact": "priority: purvaviddha → tithi-day · margin 4993 s" }, { "step": "ruling", "text": "Candra Ṣaṣṭhī, Lu’an, 1990: Sunday 9 September.", "fact": "confidence: boundary (absent-unstated)" } ], "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": "1990-09-09", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-09", "confidence": "boundary" } ], "quote": "In Lu’an, Candra Ṣaṣṭhī 1990 falls on Sunday 9 September. Ṣaṣṭhī runs from 23:45 on Sun 9 Sep to 21:18 on Mon 10 Sep, and is current at moonrise on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1990/chandra-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/jitashtami", "festival": "jitashtami", "name": "Jitāṣṭamī", "everyday": "Jitiya", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1622, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-09-11T18:58:40+09:00", "utc": "1990-09-11T09:58:40Z", "ms": 653047120078.3362 }, "end": { "local": "1990-09-12T16:50:59+09:00", "utc": "1990-09-12T07:50:59Z", "ms": 653125859116.8779 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-11T18:58:40+09:00", "utc": "1990-09-11T09:58:40Z", "ms": 653047120078.3362 }, "end": { "local": "1990-09-12T16:50:59+09:00", "utc": "1990-09-12T07:50:59Z", "ms": 653125859116.8779 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-09-11", "window": { "start": { "local": "1990-09-11T19:25:42+09:00", "utc": "1990-09-11T10:25:42Z", "ms": 653048741691.262 }, "end": { "local": "1990-09-11T20:57:43+09:00", "utc": "1990-09-11T11:57:43Z", "ms": 653054263371.5111 } }, "covered_min": 92, "window_min": 92, "qualifies": true }, { "local_date": "1990-09-12", "window": { "start": { "local": "1990-09-12T19:24:24+09:00", "utc": "1990-09-12T10:24:24Z", "ms": 653135063555.5564 }, "end": { "local": "1990-09-12T20:56:40+09:00", "utc": "1990-09-12T11:56:40Z", "ms": 653140600457.0137 } }, "covered_min": 0, "window_min": 92, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 18:59 on Tue 11 Sep to 16:51 on Wed 12 Sep.", "fact": "1990-09-11T09:58:40Z → 1990-09-12T07:50:59Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 19:26–20:58 on the 11th, 19:24–20:57 on the 12th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Aṣṭamī must be present during pradoṣa. It covers 92 of 92 minutes on the 11th and 0 of 92 on the 12th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1622 s" }, { "step": "ruling", "text": "Jitāṣṭamī, Lu’an, 1990: Tuesday 11 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": "1990-09-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-11", "confidence": "determinate" } ], "quote": "In Lu’an, Jitāṣṭamī (Jitiya) 1990 falls on Tuesday 11 September. Aṣṭamī runs from 18:59 on Tue 11 Sep to 16:51 on Wed 12 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/jitashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/mahalakshmi-vrata-samapana", "festival": "mahalakshmi-vrata-samapana", "name": "Mahālakṣmī Vrata Samāpana", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-11", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16663, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-09-11T18:58:40+09:00", "utc": "1990-09-11T09:58:40Z", "ms": 653047120078.3362 }, "end": { "local": "1990-09-12T16:50:59+09:00", "utc": "1990-09-12T07:50:59Z", "ms": 653125859116.8779 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-11T18:58:40+09:00", "utc": "1990-09-11T09:58:40Z", "ms": 653047120078.3362 }, "end": { "local": "1990-09-12T16:50:59+09:00", "utc": "1990-09-12T07:50:59Z", "ms": 653125859116.8779 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-09-11", "window": { "start": { "local": "1990-09-11T23:36:23+09:00", "utc": "1990-09-11T14:36:23Z", "ms": 653063783333.673 }, "end": { "local": "1990-09-11T23:36:23+09:00", "utc": "1990-09-11T14:36:23Z", "ms": 653063783333.673 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-09-12", "window": { "start": { "local": "1990-09-13T00:38:25+09:00", "utc": "1990-09-12T15:38:25Z", "ms": 653153904936.6271 }, "end": { "local": "1990-09-13T00:38:25+09:00", "utc": "1990-09-12T15:38:25Z", "ms": 653153904936.6271 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 18:59 on Tue 11 Sep to 16:51 on Wed 12 Sep.", "fact": "1990-09-11T09:58:40Z → 1990-09-12T07:50:59Z" }, { "step": "kaala", "text": "Moonrise is at 23:36 on the 11th and 00:38 on the 12th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is on the 11th and is not on the 12th.", "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 16663 s" }, { "step": "ruling", "text": "Mahālakṣmī Vrata Samāpana, Lu’an, 1990: Tuesday 11 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": "1990-09-11", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-11", "confidence": "determinate" } ], "quote": "In Lu’an, Mahālakṣmī Vrata Samāpana 1990 falls on Tuesday 11 September. Aṣṭamī runs from 18:59 on Tue 11 Sep to 16:51 on Wed 12 Sep and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/mahalakshmi-vrata-samapana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-09-15", "festival": "ekadashi", "name": "Indirā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17929, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-09-14T13:18:32+09:00", "utc": "1990-09-14T04:18:32Z", "ms": 653285911815.8229 }, "end": { "local": "1990-09-15T11:56:31+09:00", "utc": "1990-09-15T02:56:31Z", "ms": 653367391254.5184 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-14T13:18:32+09:00", "utc": "1990-09-14T04:18:32Z", "ms": 653285911815.8229 }, "end": { "local": "1990-09-15T11:56:31+09:00", "utc": "1990-09-15T02:56:31Z", "ms": 653367391254.5184 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-09-14", "window": { "start": { "local": "1990-09-14T06:57:06+09:00", "utc": "1990-09-13T21:57:06Z", "ms": 653263026374.2032 }, "end": { "local": "1990-09-14T06:57:06+09:00", "utc": "1990-09-13T21:57:06Z", "ms": 653263026374.2032 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-09-15", "window": { "start": { "local": "1990-09-15T06:57:42+09:00", "utc": "1990-09-14T21:57:42Z", "ms": 653349462474.6145 }, "end": { "local": "1990-09-15T06:57:42+09:00", "utc": "1990-09-14T21:57:42Z", "ms": 653349462474.6145 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 13:19 on Fri 14 Sep to 11:57 on Sat 15 Sep.", "fact": "1990-09-14T04:18:32Z → 1990-09-15T02:56:31Z" }, { "step": "kaala", "text": "Sunrise is at 06:57 on the 14th and 06:58 on the 15th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 14th and is on the 15th.", "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 17929 s" }, { "step": "ruling", "text": "Indirā Ekādaśī, Lu’an, 1990: Saturday 15 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": "1990-09-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-15", "confidence": "determinate" } ], "quote": "In Lu’an, Indirā Ekādaśī 1990 falls on Saturday 15 September. Ekādaśī runs from 13:19 on Fri 14 Sep to 11:57 on Sat 15 Sep and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-09-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-09-16", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30410, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-09-16T09:52:20+08:00", "utc": "1990-09-16T01:52:20Z", "ms": 653449939636.7643 }, "end": { "local": "1990-09-17T09:07:39+08:00", "utc": "1990-09-17T01:07:39Z", "ms": 653533658515.3088 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-16T09:52:20+08:00", "utc": "1990-09-16T01:52:20Z", "ms": 653449939636.7643 }, "end": { "local": "1990-09-17T09:07:39+08:00", "utc": "1990-09-17T01:07:39Z", "ms": 653533658515.3088 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-09-16", "window": { "start": { "local": "1990-09-16T18:19:09+08:00", "utc": "1990-09-16T10:19:09Z", "ms": 653480349409.0402 }, "end": { "local": "1990-09-16T19:52:27+08:00", "utc": "1990-09-16T11:52:27Z", "ms": 653485947466.3158 } }, "covered_min": 93, "window_min": 93, "qualifies": true }, { "local_date": "1990-09-17", "window": { "start": { "local": "1990-09-17T18:17:51+08:00", "utc": "1990-09-17T10:17:51Z", "ms": 653566670603.3256 }, "end": { "local": "1990-09-17T19:51:24+08:00", "utc": "1990-09-17T11:51:24Z", "ms": 653572284005.196 } }, "covered_min": 0, "window_min": 94, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 09:52 on Sun 16 Sep to 09:08 on Mon 17 Sep.", "fact": "1990-09-16T01:52:20Z → 1990-09-17T01:07:39Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:19–19:52 on the 16th, 18:18–19:51 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 93 of 93 minutes on the 16th and 0 of 94 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 30410 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Sunday 16 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": "1990-09-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-16", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Sunday 16 September. Trayodaśī runs from 09:52 on Sun 16 Sep to 09:08 on Mon 17 Sep and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-09-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-09-17", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29523, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-09-17T09:07:39+08:00", "utc": "1990-09-17T01:07:39Z", "ms": 653533658515.3088 }, "end": { "local": "1990-09-18T08:44:44+08:00", "utc": "1990-09-18T00:44:44Z", "ms": 653618684205.8698 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-17T09:07:39+08:00", "utc": "1990-09-17T01:07:39Z", "ms": 653533658515.3088 }, "end": { "local": "1990-09-18T08:44:44+08:00", "utc": "1990-09-18T00:44:44Z", "ms": 653618684205.8698 } }, "kaala": "nishita", "days": [ { "local_date": "1990-09-16", "window": { "start": { "local": "1990-09-16T23:45:02+08:00", "utc": "1990-09-16T15:45:02Z", "ms": 653499902123.8236 }, "end": { "local": "1990-09-17T00:33:02+08:00", "utc": "1990-09-16T16:33:02Z", "ms": 653502782123.8236 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-09-17", "window": { "start": { "local": "1990-09-17T23:44:41+08:00", "utc": "1990-09-17T15:44:41Z", "ms": 653586280860.3401 }, "end": { "local": "1990-09-18T00:32:41+08:00", "utc": "1990-09-17T16:32:41Z", "ms": 653589160860.3401 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 09:08 on Mon 17 Sep to 08:45 on Tue 18 Sep.", "fact": "1990-09-17T01:07:39Z → 1990-09-18T00:44:44Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:45–00:33 on the 16th, 23:45–00:33 on the 17th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 16th and 48 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 29523 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Monday 17 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": "1990-09-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-17", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Monday 17 September. Caturdaśī runs from 09:08 on Mon 17 Sep to 08:45 on Tue 18 Sep and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-09-17", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/mahalaya-amavasya", "festival": "mahalaya-amavasya", "name": "Mahālaya Amāvāsyā", "everyday": "Sarvapitṛ Amāvāsyā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16490, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1990-09-18T08:44:44+08:00", "utc": "1990-09-18T00:44:44Z", "ms": 653618684205.8698 }, "end": { "local": "1990-09-19T08:46:21+08:00", "utc": "1990-09-19T00:46:21Z", "ms": 653705181068.683 }, "month": { "amanta": 5, "purnimanta": 6, "adhika": false, "amanta_name": "Bhādrapada", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-18T08:44:44+08:00", "utc": "1990-09-18T00:44:44Z", "ms": 653618684205.8698 }, "end": { "local": "1990-09-19T08:46:21+08:00", "utc": "1990-09-19T00:46:21Z", "ms": 653705181068.683 } }, "kaala": "aparahna", "days": [ { "local_date": "1990-09-18", "window": { "start": { "local": "1990-09-18T13:21:43+08:00", "utc": "1990-09-18T05:21:43Z", "ms": 653635303491.585 }, "end": { "local": "1990-09-18T15:49:08+08:00", "utc": "1990-09-18T07:49:08Z", "ms": 653644147616.3284 } }, "covered_min": 147, "window_min": 147, "qualifies": true }, { "local_date": "1990-09-19", "window": { "start": { "local": "1990-09-19T13:21:11+08:00", "utc": "1990-09-19T05:21:11Z", "ms": 653721670696.8636 }, "end": { "local": "1990-09-19T15:48:12+08:00", "utc": "1990-09-19T07:48:12Z", "ms": 653730491772.133 } }, "covered_min": 0, "window_min": 147, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 08:45 on Tue 18 Sep to 08:46 on Wed 19 Sep.", "fact": "1990-09-18T00:44:44Z → 1990-09-19T00:46:21Z" }, { "step": "kaala", "text": "Aparāhṇa is 10th to 12th of 15 day muhūrtas: 13:22–15:49 on the 18th, 13:21–15:48 on the 19th.", "fact": "aparahna: day-muhurta-10-12 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during aparāhṇa. It covers 147 of 147 minutes on the 18th and 0 of 147 on the 19th.", "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 16490 s" }, { "step": "ruling", "text": "Mahālaya Amāvāsyā, Lu’an, 1990: Tuesday 18 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": "1990-09-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-18", "confidence": "determinate" } ], "quote": "In Lu’an, Mahālaya Amāvāsyā 1990 falls on Tuesday 18 September. Amāvasyā runs from 08:45 on Tue 18 Sep to 08:46 on Wed 19 Sep and covers all of aparāhṇa that afternoon.", "cite": "https://ahargana.org/lu-an/festivals/1990/mahalaya-amavasya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/navaratra-arambha", "festival": "navaratra-arambha", "name": "Navarātrārambha", "everyday": "Navratri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8883, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1990-09-19T08:46:21+08:00", "utc": "1990-09-19T00:46:21Z", "ms": 653705181068.683 }, "end": { "local": "1990-09-20T09:15:16+08:00", "utc": "1990-09-20T01:15:16Z", "ms": 653793316367.9949 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-19T08:46:21+08:00", "utc": "1990-09-19T00:46:21Z", "ms": 653705181068.683 }, "end": { "local": "1990-09-20T09:15:16+08:00", "utc": "1990-09-20T01:15:16Z", "ms": 653793316367.9949 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-09-19", "window": { "start": { "local": "1990-09-19T11:43:40+08:00", "utc": "1990-09-19T03:43:40Z", "ms": 653715820159.2289 }, "end": { "local": "1990-09-19T12:31:40+08:00", "utc": "1990-09-19T04:31:40Z", "ms": 653718700159.2289 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-09-20", "window": { "start": { "local": "1990-09-20T11:43:19+08:00", "utc": "1990-09-20T03:43:19Z", "ms": 653802198927.666 }, "end": { "local": "1990-09-20T12:31:19+08:00", "utc": "1990-09-20T04:31:19Z", "ms": 653805078927.666 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 08:46 on Wed 19 Sep to 09:15 on Thu 20 Sep.", "fact": "1990-09-19T00:46:21Z → 1990-09-20T01:15:16Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 19th, 11:43–12:31 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 48 of 48 minutes on the 19th and 0 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 8883 s" }, { "step": "ruling", "text": "Navarātrārambha, Lu’an, 1990: Wednesday 19 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": "1990-09-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-19", "confidence": "determinate" } ], "quote": "In Lu’an, Navarātrārambha (Navratri) 1990 falls on Wednesday 19 September. Pratipadā runs from 08:46 on Wed 19 Sep to 09:15 on Thu 20 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/navaratra-arambha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-09-22", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-22", "confidence": "boundary", "boundary_reasons": [ "margin", "tie-break-unstated" ], "boundary_margin_s": 45, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-09-22T11:41:52+08:00", "utc": "1990-09-22T03:41:52Z", "ms": 653974911932.1761 }, "end": { "local": "1990-09-23T13:37:49+08:00", "utc": "1990-09-23T05:37:49Z", "ms": 654068268933.9679 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-22T11:41:52+08:00", "utc": "1990-09-22T03:41:52Z", "ms": 653974911932.1761 }, "end": { "local": "1990-09-23T13:37:49+08:00", "utc": "1990-09-23T05:37:49Z", "ms": 654068268933.9679 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-09-22", "window": { "start": { "local": "1990-09-22T11:42:37+08:00", "utc": "1990-09-22T03:42:37Z", "ms": 653974956647.9711 }, "end": { "local": "1990-09-22T12:30:37+08:00", "utc": "1990-09-22T04:30:37Z", "ms": 653977836647.9711 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-09-23", "window": { "start": { "local": "1990-09-23T11:42:16+08:00", "utc": "1990-09-23T03:42:16Z", "ms": 654061335634.9187 }, "end": { "local": "1990-09-23T12:30:16+08:00", "utc": "1990-09-23T04:30:16Z", "ms": 654064215634.9187 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Caturthī runs from 11:42 on Sat 22 Sep to 13:38 on Sun 23 Sep.", "fact": "1990-09-22T03:41:52Z → 1990-09-23T05:37:49Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:43–12:31 on the 22nd, 11:42–12:30 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 48 of 48 minutes on the 22nd and 48 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 45 s < 300 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Saturday 22 September.", "fact": "confidence: boundary (margin, tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "vinayaka-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-09-22", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-23", "confidence": "boundary" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Saturday 22 September. Caturthī runs from 11:42 on Sat 22 Sep to 13:38 on Sun 23 Sep and covers all of madhyāhna that midday. It also reaches the next midday for 48 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 0 min 45 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-09-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/durga-saptami", "festival": "durga-saptami", "name": "Durgā Saptamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-26", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 32967, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1990-09-25T18:25:56+08:00", "utc": "1990-09-25T10:25:56Z", "ms": 654258355726.0477 }, "end": { "local": "1990-09-26T20:55:35+08:00", "utc": "1990-09-26T12:55:35Z", "ms": 654353734971.9542 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-25T18:25:56+08:00", "utc": "1990-09-25T10:25:56Z", "ms": 654258355726.0477 }, "end": { "local": "1990-09-26T20:55:35+08:00", "utc": "1990-09-26T12:55:35Z", "ms": 654353734971.9542 } }, "kaala": "udaya-1", "days": [ { "local_date": "1990-09-26", "window": { "start": { "local": "1990-09-26T06:04:25+08:00", "utc": "1990-09-25T22:04:25Z", "ms": 654300264777.6604 }, "end": { "local": "1990-09-26T06:52:31+08:00", "utc": "1990-09-25T22:52:31Z", "ms": 654303151250.3011 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-09-27", "window": { "start": { "local": "1990-09-27T06:05:02+08:00", "utc": "1990-09-26T22:05:02Z", "ms": 654386702058.4331 }, "end": { "local": "1990-09-27T06:53:01+08:00", "utc": "1990-09-26T22:53:01Z", "ms": 654389580831.6155 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 18:26 on Tue 25 Sep to 20:56 on Wed 26 Sep.", "fact": "1990-09-25T10:25:56Z → 1990-09-26T12:55:35Z" }, { "step": "kaala", "text": "The first muhūrta after sunrise is 1st of 15 day muhūrtas: 06:04–06:53 on the 26th, 06:05–06:53 on the 27th.", "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 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. 104" }, { "step": "tie_break", "text": "Only one morning qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 32967 s" }, { "step": "ruling", "text": "Durgā Saptamī, Lu’an, 1990: Wednesday 26 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": "1990-09-26", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-26", "confidence": "determinate" } ], "quote": "In Lu’an, Durgā Saptamī 1990 falls on Wednesday 26 September. Saptamī runs from 18:26 on Tue 25 Sep to 20:56 on Wed 26 Sep and covers all of the first muhūrta after sunrise that morning.", "cite": "https://ahargana.org/lu-an/festivals/1990/durga-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/mahashtami", "festival": "mahashtami", "name": "Mahāṣṭamī", "everyday": "Durga Ashtami", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 30382, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-09-26T20:55:35+08:00", "utc": "1990-09-26T12:55:35Z", "ms": 654353734971.9542 }, "end": { "local": "1990-09-27T23:10:07+08:00", "utc": "1990-09-27T15:10:07Z", "ms": 654448207218.0948 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-26T20:55:35+08:00", "utc": "1990-09-26T12:55:35Z", "ms": 654353734971.9542 }, "end": { "local": "1990-09-27T23:10:07+08:00", "utc": "1990-09-27T15:10:07Z", "ms": 654448207218.0948 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-09-26", "window": { "start": { "local": "1990-09-26T11:41:13+08:00", "utc": "1990-09-26T03:41:13Z", "ms": 654320473322.4662 }, "end": { "local": "1990-09-26T12:29:13+08:00", "utc": "1990-09-26T04:29:13Z", "ms": 654323353322.4662 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-09-27", "window": { "start": { "local": "1990-09-27T11:40:53+08:00", "utc": "1990-09-27T03:40:53Z", "ms": 654406852857.3005 }, "end": { "local": "1990-09-27T12:28:53+08:00", "utc": "1990-09-27T04:28:53Z", "ms": 654409732857.3005 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 20:56 on Wed 26 Sep to 23:10 on Thu 27 Sep.", "fact": "1990-09-26T12:55:35Z → 1990-09-27T15:10:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 26th, 11:41–12:29 on the 27th.", "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 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: paraviddha → only-day · margin 30382 s" }, { "step": "ruling", "text": "Mahāṣṭamī, Lu’an, 1990: Thursday 27 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": "1990-09-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-27", "confidence": "determinate" } ], "quote": "In Lu’an, Mahāṣṭamī (Durga Ashtami) 1990 falls on Thursday 27 September. Aṣṭamī runs from 20:56 on Wed 26 Sep to 23:10 on Thu 27 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/mahashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/mahanavami", "festival": "mahanavami", "name": "Mahānavamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 38474, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1990-09-27T23:10:07+08:00", "utc": "1990-09-27T15:10:07Z", "ms": 654448207218.0948 }, "end": { "local": "1990-09-29T00:55:35+08:00", "utc": "1990-09-28T16:55:35Z", "ms": 654540935072.0137 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-27T23:10:07+08:00", "utc": "1990-09-27T15:10:07Z", "ms": 654448207218.0948 }, "end": { "local": "1990-09-29T00:55:35+08:00", "utc": "1990-09-28T16:55:35Z", "ms": 654540935072.0137 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-09-27", "window": { "start": { "local": "1990-09-27T11:40:53+08:00", "utc": "1990-09-27T03:40:53Z", "ms": 654406852857.3005 }, "end": { "local": "1990-09-27T12:28:53+08:00", "utc": "1990-09-27T04:28:53Z", "ms": 654409732857.3005 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-09-28", "window": { "start": { "local": "1990-09-28T11:40:33+08:00", "utc": "1990-09-28T03:40:33Z", "ms": 654493232577.6821 }, "end": { "local": "1990-09-28T12:28:33+08:00", "utc": "1990-09-28T04:28:33Z", "ms": 654496112577.6821 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 23:10 on Thu 27 Sep to 00:56 on Sat 29 Sep.", "fact": "1990-09-27T15:10:07Z → 1990-09-28T16:55:35Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 27th, 11:41–12:29 on the 28th.", "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 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: purvaviddha → only-day · margin 38474 s" }, { "step": "ruling", "text": "Mahānavamī, Lu’an, 1990: Friday 28 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": "1990-09-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-28", "confidence": "determinate" } ], "quote": "In Lu’an, Mahānavamī 1990 falls on Friday 28 September. Navamī runs from 23:10 on Thu 27 Sep to 00:56 on Sat 29 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/mahanavami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vijaya-dashami", "festival": "vijaya-dashami", "name": "Vijayā Daśamī", "everyday": "Dussehra", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10863, "anga": { "type": "tithi", "index": 9, "key": "dashami", "name": "Daśamī", "start": { "local": "1990-09-29T00:55:35+08:00", "utc": "1990-09-28T16:55:35Z", "ms": 654540935072.0137 }, "end": { "local": "1990-09-30T02:00:50+08:00", "utc": "1990-09-29T18:00:50Z", "ms": 654631250416.87 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-29T00:55:35+08:00", "utc": "1990-09-28T16:55:35Z", "ms": 654540935072.0137 }, "end": { "local": "1990-09-30T02:00:50+08:00", "utc": "1990-09-29T18:00:50Z", "ms": 654631250416.87 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-09-29", "window": { "start": { "local": "1990-09-29T11:40:13+08:00", "utc": "1990-09-29T03:40:13Z", "ms": 654579612503.8928 }, "end": { "local": "1990-09-29T12:28:13+08:00", "utc": "1990-09-29T04:28:13Z", "ms": 654582492503.8928 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-09-30", "window": { "start": { "local": "1990-09-30T11:39:53+08:00", "utc": "1990-09-30T03:39:53Z", "ms": 654665992656.7261 }, "end": { "local": "1990-09-30T12:27:53+08:00", "utc": "1990-09-30T04:27:53Z", "ms": 654668872656.7261 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Daśamī runs from 00:56 on Sat 29 Sep to 02:01 on Sun 30 Sep.", "fact": "1990-09-28T16:55:35Z → 1990-09-29T18:00:50Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:40–12:28 on the 29th, 11:40–12:28 on the 30th.", "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 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. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 10863 s" }, { "step": "ruling", "text": "Vijayā Daśamī, Lu’an, 1990: Saturday 29 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": "1990-09-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-29", "confidence": "determinate" } ], "quote": "In Lu’an, Vijayā Daśamī (Dussehra) 1990 falls on Saturday 29 September. Daśamī touches Śravaṇa in the day time on neither day, so madhyāhna decides. Daśamī runs from 00:56 on Sat 29 Sep to 02:01 on Sun 30 Sep and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vijaya-dashami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-09-30", "festival": "ekadashi", "name": "Pāśāṅkuśā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-09-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 13708, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-09-30T02:00:50+08:00", "utc": "1990-09-29T18:00:50Z", "ms": 654631250416.87 }, "end": { "local": "1990-10-01T02:19:05+08:00", "utc": "1990-09-30T18:19:05Z", "ms": 654718744839.621 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-09-30T02:00:50+08:00", "utc": "1990-09-29T18:00:50Z", "ms": 654631250416.87 }, "end": { "local": "1990-10-01T02:19:05+08:00", "utc": "1990-09-30T18:19:05Z", "ms": 654718744839.621 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-09-30", "window": { "start": { "local": "1990-09-30T06:06:55+08:00", "utc": "1990-09-29T22:06:55Z", "ms": 654646014933.0922 }, "end": { "local": "1990-09-30T06:06:55+08:00", "utc": "1990-09-29T22:06:55Z", "ms": 654646014933.0922 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-10-01", "window": { "start": { "local": "1990-10-01T06:07:33+08:00", "utc": "1990-09-30T22:07:33Z", "ms": 654732452944.9766 }, "end": { "local": "1990-10-01T06:07:33+08:00", "utc": "1990-09-30T22:07:33Z", "ms": 654732452944.9766 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 02:01 on Sun 30 Sep to 02:19 on Mon 1 Oct.", "fact": "1990-09-29T18:00:50Z → 1990-09-30T18:19:05Z" }, { "step": "kaala", "text": "Sunrise is at 06:07 on the 30th and 06:08 on the 1st.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 30th and is not on the 1st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 13708 s" }, { "step": "ruling", "text": "Pāśāṅkuśā Ekādaśī, Lu’an, 1990: Sunday 30 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": "1990-09-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-09-30", "confidence": "determinate" } ], "quote": "In Lu’an, Pāśāṅkuśā Ekādaśī 1990 falls on Sunday 30 September. Ekādaśī runs from 02:01 on Sun 30 Sep to 02:19 on Mon 1 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-09-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-10-02", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17713, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-10-02T01:48:18+08:00", "utc": "1990-10-01T17:48:18Z", "ms": 654803298241.9005 }, "end": { "local": "1990-10-03T00:30:54+08:00", "utc": "1990-10-02T16:30:54Z", "ms": 654885053580.368 }, "month": { "amanta": 6, "purnimanta": 6, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Āśvina" } }, "span": { "of": "tithi", "start": { "local": "1990-10-02T01:48:18+08:00", "utc": "1990-10-01T17:48:18Z", "ms": 654803298241.9005 }, "end": { "local": "1990-10-03T00:30:54+08:00", "utc": "1990-10-02T16:30:54Z", "ms": 654885053580.368 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-10-01", "window": { "start": { "local": "1990-10-01T17:59:33+08:00", "utc": "1990-10-01T09:59:33Z", "ms": 654775173170.321 }, "end": { "local": "1990-10-01T19:36:42+08:00", "utc": "1990-10-01T11:36:42Z", "ms": 654781002237.4774 } }, "covered_min": 0, "window_min": 97, "qualifies": false }, { "local_date": "1990-10-02", "window": { "start": { "local": "1990-10-02T17:58:16+08:00", "utc": "1990-10-02T09:58:16Z", "ms": 654861496283.8911 }, "end": { "local": "1990-10-02T19:35:41+08:00", "utc": "1990-10-02T11:35:41Z", "ms": 654867340730.7457 } }, "covered_min": 97, "window_min": 97, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 01:48 on Tue 2 Oct to 00:31 on Wed 3 Oct.", "fact": "1990-10-01T17:48:18Z → 1990-10-02T16:30:54Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 18:00–19:37 on the 1st, 17:58–19:36 on the 2nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 97 minutes on the 1st and 97 of 97 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 17713 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Tuesday 2 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": "1990-10-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-02", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Tuesday 2 October. Trayodaśī runs from 01:48 on Tue 2 Oct to 00:31 on Wed 3 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-10-02", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/karaka-chaturthi", "festival": "karaka-chaturthi", "name": "Karaka Caturthī", "everyday": "Karwa Chauth", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31509, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-10-07T10:50:47+08:00", "utc": "1990-10-07T02:50:47Z", "ms": 655267847208.5057 }, "end": { "local": "1990-10-08T07:46:46+08:00", "utc": "1990-10-07T23:46:46Z", "ms": 655343205620.0079 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-07T10:50:47+08:00", "utc": "1990-10-07T02:50:47Z", "ms": 655267847208.5057 }, "end": { "local": "1990-10-08T07:46:46+08:00", "utc": "1990-10-07T23:46:46Z", "ms": 655343205620.0079 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-10-07", "window": { "start": { "local": "1990-10-07T19:35:56+08:00", "utc": "1990-10-07T11:35:56Z", "ms": 655299355747.2241 }, "end": { "local": "1990-10-07T19:35:56+08:00", "utc": "1990-10-07T11:35:56Z", "ms": 655299355747.2241 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-10-08", "window": { "start": { "local": "1990-10-08T20:30:23+08:00", "utc": "1990-10-08T12:30:23Z", "ms": 655389023337.6012 }, "end": { "local": "1990-10-08T20:30:23+08:00", "utc": "1990-10-08T12:30:23Z", "ms": 655389023337.6012 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:51 on Sun 7 Oct to 07:47 on Mon 8 Oct.", "fact": "1990-10-07T02:50:47Z → 1990-10-07T23:46:46Z" }, { "step": "kaala", "text": "Moonrise is at 19:36 on the 7th and 20:30 on the 8th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 7th and is not on the 8th.", "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 31509 s" }, { "step": "ruling", "text": "Karaka Caturthī, Lu’an, 1990: Sunday 7 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": "1990-10-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-07", "confidence": "determinate" } ], "quote": "In Lu’an, Karaka Caturthī (Karwa Chauth) 1990 falls on Sunday 7 October. Caturthī runs from 10:51 on Sun 7 Oct to 07:47 on Mon 8 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/karaka-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-10-07", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-07", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31509, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-10-07T10:50:47+08:00", "utc": "1990-10-07T02:50:47Z", "ms": 655267847208.5057 }, "end": { "local": "1990-10-08T07:46:46+08:00", "utc": "1990-10-07T23:46:46Z", "ms": 655343205620.0079 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-07T10:50:47+08:00", "utc": "1990-10-07T02:50:47Z", "ms": 655267847208.5057 }, "end": { "local": "1990-10-08T07:46:46+08:00", "utc": "1990-10-07T23:46:46Z", "ms": 655343205620.0079 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-10-07", "window": { "start": { "local": "1990-10-07T19:35:56+08:00", "utc": "1990-10-07T11:35:56Z", "ms": 655299355747.2241 }, "end": { "local": "1990-10-07T19:35:56+08:00", "utc": "1990-10-07T11:35:56Z", "ms": 655299355747.2241 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-10-08", "window": { "start": { "local": "1990-10-08T20:30:23+08:00", "utc": "1990-10-08T12:30:23Z", "ms": 655389023337.6012 }, "end": { "local": "1990-10-08T20:30:23+08:00", "utc": "1990-10-08T12:30:23Z", "ms": 655389023337.6012 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 10:51 on Sun 7 Oct to 07:47 on Mon 8 Oct.", "fact": "1990-10-07T02:50:47Z → 1990-10-07T23:46:46Z" }, { "step": "kaala", "text": "Moonrise is at 19:36 on the 7th and 20:30 on the 8th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 7th and is not on the 8th.", "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 31509 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Sunday 7 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": "1990-10-07", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-07", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Sunday 7 October. Caturthī runs from 10:51 on Sun 7 Oct to 07:47 on Mon 8 Oct and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-10-07", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ahoyi-ashtami", "festival": "ahoyi-ashtami", "name": "Ahoyī Aṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-10", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 3508, "anga": { "type": "tithi", "index": 22, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-10-11T00:23:15+08:00", "utc": "1990-10-10T16:23:15Z", "ms": 655575794506.4739 }, "end": { "local": "1990-10-11T22:46:36+08:00", "utc": "1990-10-11T14:46:36Z", "ms": 655656395986.1543 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-11T00:23:15+08:00", "utc": "1990-10-10T16:23:15Z", "ms": 655575794506.4739 }, "end": { "local": "1990-10-11T22:46:36+08:00", "utc": "1990-10-11T14:46:36Z", "ms": 655656395986.1543 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-10-10", "window": { "start": { "local": "1990-10-10T22:37:47+08:00", "utc": "1990-10-10T14:37:47Z", "ms": 655569467256.7953 }, "end": { "local": "1990-10-10T22:37:47+08:00", "utc": "1990-10-10T14:37:47Z", "ms": 655569467256.7953 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-10-11", "window": { "start": { "local": "1990-10-11T23:45:04+08:00", "utc": "1990-10-11T15:45:04Z", "ms": 655659904090.9119 }, "end": { "local": "1990-10-11T23:45:04+08:00", "utc": "1990-10-11T15:45:04Z", "ms": 655659904090.9119 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 00:23 on Thu 11 Oct to 22:47 on Thu 11 Oct.", "fact": "1990-10-10T16:23:15Z → 1990-10-11T14:46:36Z" }, { "step": "kaala", "text": "Moonrise is at 22:38 on the 10th and 23:45 on the 11th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Aṣṭamī must be current at moonrise. It is not on the 10th and is not on the 11th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Neither moonrise qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 3508 s" }, { "step": "ruling", "text": "Ahoyī Aṣṭamī, Lu’an, 1990: Wednesday 10 October.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "ahoyi-ashtami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 8 Ahoyi astami (Gujerat) (current at moonrise), Karastami (Maharashtra). If occurs on two successive days, it is to be observed on the second day." } ], "kaala": "moonrise", "priority": "paraviddha", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-10-10", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-10", "confidence": "boundary" } ], "quote": "In Lu’an, Ahoyī Aṣṭamī 1990 falls on Wednesday 10 October. Aṣṭamī runs from 00:23 on Thu 11 Oct to 22:47 on Thu 11 Oct, and is current at moonrise on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ahoyi-ashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-10-14", "festival": "ekadashi", "name": "Ramā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33535, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-10-13T20:57:17+08:00", "utc": "1990-10-13T12:57:17Z", "ms": 655822637428.885 }, "end": { "local": "1990-10-14T20:42:15+08:00", "utc": "1990-10-14T12:42:15Z", "ms": 655908134889.2976 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-13T20:57:17+08:00", "utc": "1990-10-13T12:57:17Z", "ms": 655822637428.885 }, "end": { "local": "1990-10-14T20:42:15+08:00", "utc": "1990-10-14T12:42:15Z", "ms": 655908134889.2976 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-10-14", "window": { "start": { "local": "1990-10-14T06:16:13+08:00", "utc": "1990-10-13T22:16:13Z", "ms": 655856172628.4769 }, "end": { "local": "1990-10-14T06:16:13+08:00", "utc": "1990-10-13T22:16:13Z", "ms": 655856172628.4769 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-10-15", "window": { "start": { "local": "1990-10-15T06:16:55+08:00", "utc": "1990-10-14T22:16:55Z", "ms": 655942615028.9567 }, "end": { "local": "1990-10-15T06:16:55+08:00", "utc": "1990-10-14T22:16:55Z", "ms": 655942615028.9567 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 20:57 on Sat 13 Oct to 20:42 on Sun 14 Oct.", "fact": "1990-10-13T12:57:17Z → 1990-10-14T12:42:15Z" }, { "step": "kaala", "text": "Sunrise is at 06:16 on the 14th and 06:17 on the 15th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 14th and is not on the 15th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 33535 s" }, { "step": "ruling", "text": "Ramā Ekādaśī, Lu’an, 1990: Sunday 14 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": "1990-10-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-14", "confidence": "determinate" } ], "quote": "In Lu’an, Ramā Ekādaśī 1990 falls on Sunday 14 October. Ekādaśī runs from 20:57 on Sat 13 Oct to 20:42 on Sun 14 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-10-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/govatsa-dvadashi", "festival": "govatsa-dvadashi", "name": "Govatsa Dvādaśī", "everyday": "Vasu Baras", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4697, "anga": { "type": "tithi", "index": 26, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-10-14T20:42:15+08:00", "utc": "1990-10-14T12:42:15Z", "ms": 655908134889.2976 }, "end": { "local": "1990-10-15T20:51:27+08:00", "utc": "1990-10-15T12:51:27Z", "ms": 655995086928.7819 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-14T20:42:15+08:00", "utc": "1990-10-14T12:42:15Z", "ms": 655908134889.2976 }, "end": { "local": "1990-10-15T20:51:27+08:00", "utc": "1990-10-15T12:51:27Z", "ms": 655995086928.7819 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-10-14", "window": { "start": { "local": "1990-10-14T17:43:30+08:00", "utc": "1990-10-14T09:43:30Z", "ms": 655897410236.776 }, "end": { "local": "1990-10-14T19:23:58+08:00", "utc": "1990-10-14T11:23:58Z", "ms": 655903437542.4001 } }, "covered_min": 0, "window_min": 100, "qualifies": false }, { "local_date": "1990-10-15", "window": { "start": { "local": "1990-10-15T17:42:20+08:00", "utc": "1990-10-15T09:42:20Z", "ms": 655983740392.02 }, "end": { "local": "1990-10-15T19:23:03+08:00", "utc": "1990-10-15T11:23:03Z", "ms": 655989782714.8785 } }, "covered_min": 101, "window_min": 101, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 20:42 on Sun 14 Oct to 20:51 on Mon 15 Oct.", "fact": "1990-10-14T12:42:15Z → 1990-10-15T12:51:27Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:44–19:24 on the 14th, 17:42–19:23 on the 15th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during pradoṣa. It covers 0 of 100 minutes on the 14th and 101 of 101 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: purvaviddha → only-day · margin 4697 s" }, { "step": "ruling", "text": "Govatsa Dvādaśī, Lu’an, 1990: Monday 15 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": "1990-10-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-15", "confidence": "determinate" } ], "quote": "In Lu’an, Govatsa Dvādaśī (Vasu Baras) 1990 falls on Monday 15 October. Dvādaśī runs from 20:42 on Sun 14 Oct to 20:51 on Mon 15 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/govatsa-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/yama-dipadana", "festival": "yama-dipadana", "name": "Yama Dīpadāna", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5304, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-10-15T20:51:27+08:00", "utc": "1990-10-15T12:51:27Z", "ms": 655995086928.7819 }, "end": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-15T20:51:27+08:00", "utc": "1990-10-15T12:51:27Z", "ms": 655995086928.7819 }, "end": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-10-15", "window": { "start": { "local": "1990-10-15T17:42:20+08:00", "utc": "1990-10-15T09:42:20Z", "ms": 655983740392.02 }, "end": { "local": "1990-10-15T19:23:03+08:00", "utc": "1990-10-15T11:23:03Z", "ms": 655989782714.8785 } }, "covered_min": 0, "window_min": 101, "qualifies": false }, { "local_date": "1990-10-16", "window": { "start": { "local": "1990-10-16T17:41:11+08:00", "utc": "1990-10-16T09:41:11Z", "ms": 656070071298.5287 }, "end": { "local": "1990-10-16T19:22:09+08:00", "utc": "1990-10-16T11:22:09Z", "ms": 656076128589.9557 } }, "covered_min": 101, "window_min": 101, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:51 on Mon 15 Oct to 21:24 on Tue 16 Oct.", "fact": "1990-10-15T12:51:27Z → 1990-10-16T13:23:45Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:42–19:23 on the 15th, 17:41–19:22 on the 16th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 101 minutes on the 15th and 101 of 101 on the 16th.", "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 5304 s" }, { "step": "ruling", "text": "Yama Dīpadāna, Lu’an, 1990: Tuesday 16 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": "1990-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-16", "confidence": "determinate" } ], "quote": "In Lu’an, Yama Dīpadāna 1990 falls on Tuesday 16 October. Trayodaśī runs from 20:51 on Mon 15 Oct to 21:24 on Tue 16 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/yama-dipadana", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-10-16", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 5304, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-10-15T20:51:27+08:00", "utc": "1990-10-15T12:51:27Z", "ms": 655995086928.7819 }, "end": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-15T20:51:27+08:00", "utc": "1990-10-15T12:51:27Z", "ms": 655995086928.7819 }, "end": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-10-15", "window": { "start": { "local": "1990-10-15T17:42:20+08:00", "utc": "1990-10-15T09:42:20Z", "ms": 655983740392.02 }, "end": { "local": "1990-10-15T19:23:03+08:00", "utc": "1990-10-15T11:23:03Z", "ms": 655989782714.8785 } }, "covered_min": 0, "window_min": 101, "qualifies": false }, { "local_date": "1990-10-16", "window": { "start": { "local": "1990-10-16T17:41:11+08:00", "utc": "1990-10-16T09:41:11Z", "ms": 656070071298.5287 }, "end": { "local": "1990-10-16T19:22:09+08:00", "utc": "1990-10-16T11:22:09Z", "ms": 656076128589.9557 } }, "covered_min": 101, "window_min": 101, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 20:51 on Mon 15 Oct to 21:24 on Tue 16 Oct.", "fact": "1990-10-15T12:51:27Z → 1990-10-16T13:23:45Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:42–19:23 on the 15th, 17:41–19:22 on the 16th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 101 minutes on the 15th and 101 of 101 on the 16th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 5304 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Tuesday 16 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": "1990-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-16", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Tuesday 16 October. Trayodaśī runs from 20:51 on Mon 15 Oct to 21:24 on Tue 16 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-10-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-10-16", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-16", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 4607, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 }, "end": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 }, "end": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 } }, "kaala": "nishita", "days": [ { "local_date": "1990-10-16", "window": { "start": { "local": "1990-10-16T23:35:46+08:00", "utc": "1990-10-16T15:35:46Z", "ms": 656091346141.3801 }, "end": { "local": "1990-10-17T00:23:46+08:00", "utc": "1990-10-16T16:23:46Z", "ms": 656094226141.3801 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-10-17", "window": { "start": { "local": "1990-10-17T23:35:34+08:00", "utc": "1990-10-17T15:35:34Z", "ms": 656177733763.1316 }, "end": { "local": "1990-10-18T00:23:34+08:00", "utc": "1990-10-17T16:23:34Z", "ms": 656180613763.1316 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 21:24 on Tue 16 Oct to 22:19 on Wed 17 Oct.", "fact": "1990-10-16T13:23:45Z → 1990-10-17T14:18:47Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:36–00:24 on the 16th, 23:36–00:24 on the 17th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 48 of 48 minutes on the 16th and 0 of 48 on the 17th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 4607 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Tuesday 16 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": "1990-10-16", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-16", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Tuesday 16 October. Caturdaśī runs from 21:24 on Tue 16 Oct to 22:19 on Wed 17 Oct and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-10-16", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/naraka-chaturdashi", "festival": "naraka-chaturdashi", "name": "Naraka Caturdaśī", "everyday": "Choti Diwali", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-17", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22745, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 }, "end": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-16T21:23:45+08:00", "utc": "1990-10-16T13:23:45Z", "ms": 656083425488.6326 }, "end": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 } }, "kaala": "arunodaya", "days": [ { "local_date": "1990-10-17", "window": { "start": { "local": "1990-10-17T04:37:24+08:00", "utc": "1990-10-16T20:37:24Z", "ms": 656109443692.8046 }, "end": { "local": "1990-10-17T06:18:21+08:00", "utc": "1990-10-16T22:18:21Z", "ms": 656115500984.2316 } }, "covered_min": 101, "window_min": 101, "qualifies": true }, { "local_date": "1990-10-18", "window": { "start": { "local": "1990-10-18T04:37:52+08:00", "utc": "1990-10-17T20:37:52Z", "ms": 656195872334.7487 }, "end": { "local": "1990-10-18T06:19:05+08:00", "utc": "1990-10-17T22:19:05Z", "ms": 656201944542.6095 } }, "covered_min": 0, "window_min": 101, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 21:24 on Tue 16 Oct to 22:19 on Wed 17 Oct.", "fact": "1990-10-16T13:23:45Z → 1990-10-17T14:18:47Z" }, { "step": "kaala", "text": "Aruṇodaya is 2 muhūrtas before sunrise: 04:37–06:18 on the 17th, 04:38–06:19 on the 18th.", "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 101 of 101 minutes on the 17th and 0 of 101 on the 18th.", "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 22745 s" }, { "step": "ruling", "text": "Naraka Caturdaśī, Lu’an, 1990: Wednesday 17 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": "1990-10-17", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-17", "confidence": "determinate" } ], "quote": "In Lu’an, Naraka Caturdaśī (Choti Diwali) 1990 falls on Wednesday 17 October. Caturdaśī runs from 21:24 on Tue 16 Oct to 22:19 on Wed 17 Oct and covers all of aruṇodaya that dawn.", "cite": "https://ahargana.org/lu-an/festivals/1990/naraka-chaturdashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/kali-puja", "festival": "kali-puja", "name": "Kālī Pūjā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-17", "confidence": "boundary", "boundary_reasons": [ "margin", "tie-break-unstated" ], "boundary_margin_s": 79, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 }, "end": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 }, "end": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 } }, "kaala": "nishita", "days": [ { "local_date": "1990-10-17", "window": { "start": { "local": "1990-10-17T23:35:34+08:00", "utc": "1990-10-17T15:35:34Z", "ms": 656177733763.1316 }, "end": { "local": "1990-10-18T00:23:34+08:00", "utc": "1990-10-17T16:23:34Z", "ms": 656180613763.1316 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-10-18", "window": { "start": { "local": "1990-10-18T23:35:22+08:00", "utc": "1990-10-18T15:35:22Z", "ms": 656264121981.8096 }, "end": { "local": "1990-10-19T00:23:22+08:00", "utc": "1990-10-18T16:23:22Z", "ms": 656267001981.8096 } }, "covered_min": 1, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 22:19 on Wed 17 Oct to 23:37 on Thu 18 Oct.", "fact": "1990-10-17T14:18:47Z → 1990-10-18T15:36:41Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:36–00:24 on the 17th, 23:35–00:23 on the 18th.", "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 17th and 1 of 48 on the 18th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Both nights qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 79 s < 300 s" }, { "step": "ruling", "text": "Kālī Pūjā, Lu’an, 1990: Wednesday 17 October.", "fact": "confidence: boundary (margin, tie-break-unstated)" } ], "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": "1990-10-17", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-17", "confidence": "boundary" } ], "quote": "In Lu’an, Kālī Pūjā 1990 falls on Wednesday 17 October. Amāvasyā runs from 22:19 on Wed 17 Oct to 23:37 on Thu 18 Oct and covers all of niśītha that night. It also reaches the next night for 1 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 1 min 19 s from a threshold: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1990/kali-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/diwali-lakshmi-puja", "festival": "diwali-lakshmi-puja", "name": "Lakṣmī Pūjā", "everyday": "Diwali", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-18", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 10652, "anga": { "type": "tithi", "index": 29, "key": "amavasya", "name": "Amāvasyā", "start": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 }, "end": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "month": { "amanta": 6, "purnimanta": 7, "adhika": false, "amanta_name": "Āśvina", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-17T22:18:47+08:00", "utc": "1990-10-17T14:18:47Z", "ms": 656173127028.0854 }, "end": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-10-17", "window": { "start": { "local": "1990-10-17T17:40:03+08:00", "utc": "1990-10-17T09:40:03Z", "ms": 656156402983.6536 }, "end": { "local": "1990-10-17T19:21:15+08:00", "utc": "1990-10-17T11:21:15Z", "ms": 656162475191.5144 } }, "covered_min": 0, "window_min": 101, "qualifies": false }, { "local_date": "1990-10-18", "window": { "start": { "local": "1990-10-18T17:38:55+08:00", "utc": "1990-10-18T09:38:55Z", "ms": 656242735474.5162 }, "end": { "local": "1990-10-18T19:20:23+08:00", "utc": "1990-10-18T11:20:23Z", "ms": 656248822543.1278 } }, "covered_min": 101, "window_min": 101, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Amāvasyā runs from 22:19 on Wed 17 Oct to 23:37 on Thu 18 Oct.", "fact": "1990-10-17T14:18:47Z → 1990-10-18T15:36:41Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:40–19:21 on the 17th, 17:39–19:20 on the 18th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Amāvasyā must be present during pradoṣa. It covers 0 of 101 minutes on the 17th and 101 of 101 on the 18th.", "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 10652 s" }, { "step": "ruling", "text": "Lakṣmī Pūjā, Lu’an, 1990: Thursday 18 October.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "diwali-lakshmi-puja", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "K 30 Kali puja (nisithavyapini), Dipavali or Diwali (pradosa), Mahalaksmipuja (pradosa)" } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-10-18", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-18", "confidence": "determinate" } ], "quote": "In Lu’an, Lakṣmī Pūjā (Diwali) 1990 falls on Thursday 18 October. Amāvasyā runs from 22:19 on Wed 17 Oct to 23:37 on Thu 18 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/diwali-lakshmi-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/govardhana-puja", "festival": "govardhana-puja", "name": "Govardhana Pūjā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37023, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "end": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "end": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-10-19", "window": { "start": { "local": "1990-10-19T11:34:49+08:00", "utc": "1990-10-19T03:34:49Z", "ms": 656307288643.6255 }, "end": { "local": "1990-10-19T12:22:49+08:00", "utc": "1990-10-19T04:22:49Z", "ms": 656310168643.6255 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-10-20", "window": { "start": { "local": "1990-10-20T11:34:38+08:00", "utc": "1990-10-20T03:34:38Z", "ms": 656393677902.5436 }, "end": { "local": "1990-10-20T12:22:38+08:00", "utc": "1990-10-20T04:22:38Z", "ms": 656396557902.5436 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 23:37 on Thu 18 Oct to 01:18 on Sat 20 Oct.", "fact": "1990-10-18T15:36:41Z → 1990-10-19T17:17:35Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:35–12:23 on the 19th, 11:35–12:23 on the 20th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during madhyāhna. It covers 48 of 48 minutes on the 19th and 0 of 48 on the 20th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 37023 s" }, { "step": "ruling", "text": "Govardhana Pūjā, Lu’an, 1990: Friday 19 October.", "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": "1990-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-19", "confidence": "determinate" } ], "quote": "In Lu’an, Govardhana Pūjā 1990 falls on Friday 19 October. Pratipadā runs from 23:37 on Thu 18 Oct to 01:18 on Sat 20 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/govardhana-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/bali-puja", "festival": "bali-puja", "name": "Bali Pūjā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15379, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "end": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "end": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-10-18", "window": { "start": { "local": "1990-10-18T17:38:55+08:00", "utc": "1990-10-18T09:38:55Z", "ms": 656242735474.5162 }, "end": { "local": "1990-10-18T19:20:23+08:00", "utc": "1990-10-18T11:20:23Z", "ms": 656248822543.1278 } }, "covered_min": 0, "window_min": 101, "qualifies": false }, { "local_date": "1990-10-19", "window": { "start": { "local": "1990-10-19T17:37:49+08:00", "utc": "1990-10-19T09:37:49Z", "ms": 656329068798.148 }, "end": { "local": "1990-10-19T19:19:31+08:00", "utc": "1990-10-19T11:19:31Z", "ms": 656335170668.192 } }, "covered_min": 102, "window_min": 102, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 23:37 on Thu 18 Oct to 01:18 on Sat 20 Oct.", "fact": "1990-10-18T15:36:41Z → 1990-10-19T17:17:35Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:39–19:20 on the 18th, 17:38–19:20 on the 19th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pradoṣa. It covers 0 of 101 minutes on the 18th and 102 of 102 on the 19th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one evening qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 15379 s" }, { "step": "ruling", "text": "Bali Pūjā, Lu’an, 1990: Friday 19 October.", "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": "1990-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-19", "confidence": "determinate" } ], "quote": "In Lu’an, Bali Pūjā 1990 falls on Friday 19 October. Pratipadā runs from 23:37 on Thu 18 Oct to 01:18 on Sat 20 Oct and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/bali-puja", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/dyuta-pratipad", "festival": "dyuta-pratipad", "name": "Dyūta Pratipad", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-19", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 18178, "anga": { "type": "tithi", "index": 0, "key": "pratipada", "name": "Pratipadā", "start": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "end": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-18T23:36:41+08:00", "utc": "1990-10-18T15:36:41Z", "ms": 656264201293.0765 }, "end": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 } }, "kaala": "purvahna", "days": [ { "local_date": "1990-10-19", "window": { "start": { "local": "1990-10-19T06:19:48+08:00", "utc": "1990-10-18T22:19:48Z", "ms": 656288388489.103 }, "end": { "local": "1990-10-19T10:05:49+08:00", "utc": "1990-10-19T02:05:49Z", "ms": 656301948592.118 } }, "covered_min": 226, "window_min": 226, "qualifies": true }, { "local_date": "1990-10-20", "window": { "start": { "local": "1990-10-20T06:20:33+08:00", "utc": "1990-10-19T22:20:33Z", "ms": 656374832823.478 }, "end": { "local": "1990-10-20T10:05:56+08:00", "utc": "1990-10-20T02:05:56Z", "ms": 656388356209.5217 } }, "covered_min": 0, "window_min": 225, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pratipadā runs from 23:37 on Thu 18 Oct to 01:18 on Sat 20 Oct.", "fact": "1990-10-18T15:36:41Z → 1990-10-19T17:17:35Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:20–10:06 on the 19th, 06:21–10:06 on the 20th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pratipadā must be present during pūrvāhṇa. It covers 226 of 226 minutes on the 19th and 0 of 225 on the 20th.", "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 18178 s" }, { "step": "ruling", "text": "Dyūta Pratipad, Lu’an, 1990: Friday 19 October.", "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": "1990-10-19", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-19", "confidence": "determinate" } ], "quote": "In Lu’an, Dyūta Pratipad 1990 falls on Friday 19 October. Pratipadā runs from 23:37 on Thu 18 Oct to 01:18 on Sat 20 Oct and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/lu-an/festivals/1990/dyuta-pratipad", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/yama-dvitiya", "festival": "yama-dvitiya", "name": "Yama Dvitīyā", "everyday": "Bhai Dooj", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-20", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29633, "anga": { "type": "tithi", "index": 1, "key": "dvitiya", "name": "Dvitīyā", "start": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 }, "end": { "local": "1990-10-21T03:20:35+08:00", "utc": "1990-10-20T19:20:35Z", "ms": 656450434650.4185 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-20T01:17:35+08:00", "utc": "1990-10-19T17:17:35Z", "ms": 656356654815.3018 }, "end": { "local": "1990-10-21T03:20:35+08:00", "utc": "1990-10-20T19:20:35Z", "ms": 656450434650.4185 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-10-20", "window": { "start": { "local": "1990-10-20T11:34:38+08:00", "utc": "1990-10-20T03:34:38Z", "ms": 656393677902.5436 }, "end": { "local": "1990-10-20T12:22:38+08:00", "utc": "1990-10-20T04:22:38Z", "ms": 656396557902.5436 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-10-21", "window": { "start": { "local": "1990-10-21T11:34:28+08:00", "utc": "1990-10-21T03:34:28Z", "ms": 656480067798.4553 }, "end": { "local": "1990-10-21T12:22:28+08:00", "utc": "1990-10-21T04:22:28Z", "ms": 656482947798.4553 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvitīyā runs from 01:18 on Sat 20 Oct to 03:21 on Sun 21 Oct.", "fact": "1990-10-19T17:17:35Z → 1990-10-20T19:20:35Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:35–12:23 on the 20th, 11:34–12:22 on the 21st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvitīyā must be present during madhyāhna. It covers 48 of 48 minutes on the 20th and 0 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 29633 s" }, { "step": "ruling", "text": "Yama Dvitīyā, Lu’an, 1990: Saturday 20 October.", "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": "1990-10-20", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-20", "confidence": "determinate" } ], "quote": "In Lu’an, Yama Dvitīyā (Bhai Dooj) 1990 falls on Saturday 20 October. Dvitīyā runs from 01:18 on Sat 20 Oct to 03:21 on Sun 21 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/yama-dvitiya", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/naga-chaturthi", "festival": "naga-chaturthi", "name": "Nāga Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11768, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-10-22T05:42:43+08:00", "utc": "1990-10-21T21:42:43Z", "ms": 656545363287.0702 }, "end": { "local": "1990-10-23T08:18:02+08:00", "utc": "1990-10-23T00:18:02Z", "ms": 656641081972.805 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-22T05:42:43+08:00", "utc": "1990-10-21T21:42:43Z", "ms": 656545363287.0702 }, "end": { "local": "1990-10-23T08:18:02+08:00", "utc": "1990-10-23T00:18:02Z", "ms": 656641081972.805 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-10-22", "window": { "start": { "local": "1990-10-22T11:34:18+08:00", "utc": "1990-10-22T03:34:18Z", "ms": 656566458344.2839 }, "end": { "local": "1990-10-22T12:22:18+08:00", "utc": "1990-10-22T04:22:18Z", "ms": 656569338344.2839 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-10-23", "window": { "start": { "local": "1990-10-23T11:34:10+08:00", "utc": "1990-10-23T03:34:10Z", "ms": 656652849552.7764 }, "end": { "local": "1990-10-23T12:22:10+08:00", "utc": "1990-10-23T04:22:10Z", "ms": 656655729552.7764 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:43 on Mon 22 Oct to 08:18 on Tue 23 Oct.", "fact": "1990-10-21T21:42:43Z → 1990-10-23T00:18:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 22nd, 11:34–12:22 on the 23rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 22nd and 0 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 11768 s" }, { "step": "ruling", "text": "Nāga Caturthī, Lu’an, 1990: Monday 22 October.", "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": "1990-10-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-22", "confidence": "determinate" } ], "quote": "In Lu’an, Nāga Caturthī 1990 falls on Monday 22 October. Caturthī runs from 05:43 on Mon 22 Oct to 08:18 on Tue 23 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/naga-chaturthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-10-22", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11768, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-10-22T05:42:43+08:00", "utc": "1990-10-21T21:42:43Z", "ms": 656545363287.0702 }, "end": { "local": "1990-10-23T08:18:02+08:00", "utc": "1990-10-23T00:18:02Z", "ms": 656641081972.805 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-22T05:42:43+08:00", "utc": "1990-10-21T21:42:43Z", "ms": 656545363287.0702 }, "end": { "local": "1990-10-23T08:18:02+08:00", "utc": "1990-10-23T00:18:02Z", "ms": 656641081972.805 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-10-22", "window": { "start": { "local": "1990-10-22T11:34:18+08:00", "utc": "1990-10-22T03:34:18Z", "ms": 656566458344.2839 }, "end": { "local": "1990-10-22T12:22:18+08:00", "utc": "1990-10-22T04:22:18Z", "ms": 656569338344.2839 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-10-23", "window": { "start": { "local": "1990-10-23T11:34:10+08:00", "utc": "1990-10-23T03:34:10Z", "ms": 656652849552.7764 }, "end": { "local": "1990-10-23T12:22:10+08:00", "utc": "1990-10-23T04:22:10Z", "ms": 656655729552.7764 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:43 on Mon 22 Oct to 08:18 on Tue 23 Oct.", "fact": "1990-10-21T21:42:43Z → 1990-10-23T00:18:02Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 22nd, 11:34–12:22 on the 23rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 48 of 48 minutes on the 22nd and 0 of 48 on the 23rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 11768 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Monday 22 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": "1990-10-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-22", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Monday 22 October. Caturthī runs from 05:43 on Mon 22 Oct to 08:18 on Tue 23 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-10-22", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/surya-shashthi", "festival": "surya-shashthi", "name": "Sūrya Ṣaṣṭhī", "everyday": "Chhath", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-24", "confidence": "boundary", "boundary_reasons": [ "tie-break-unstated" ], "boundary_margin_s": 2216, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-10-24T10:57:05+08:00", "utc": "1990-10-24T02:57:05Z", "ms": 656737025198.0199 }, "end": { "local": "1990-10-25T13:27:28+08:00", "utc": "1990-10-25T05:27:28Z", "ms": 656832448069.9469 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-24T10:57:05+08:00", "utc": "1990-10-24T02:57:05Z", "ms": 656737025198.0199 }, "end": { "local": "1990-10-25T13:27:28+08:00", "utc": "1990-10-25T05:27:28Z", "ms": 656832448069.9469 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-10-24", "window": { "start": { "local": "1990-10-24T11:34:01+08:00", "utc": "1990-10-24T03:34:01Z", "ms": 656739241436.5211 }, "end": { "local": "1990-10-24T12:22:01+08:00", "utc": "1990-10-24T04:22:01Z", "ms": 656742121436.5211 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-10-25", "window": { "start": { "local": "1990-10-25T11:33:54+08:00", "utc": "1990-10-25T03:33:54Z", "ms": 656825634007.9596 }, "end": { "local": "1990-10-25T12:21:54+08:00", "utc": "1990-10-25T04:21:54Z", "ms": 656828514007.9596 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "greater-coverage", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 10:57 on Wed 24 Oct to 13:27 on Thu 25 Oct.", "fact": "1990-10-24T02:57:05Z → 1990-10-25T05:27:28Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 24th, 11:34–12:22 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 48 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": "Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.", "fact": "priority: unstated → greater-coverage · margin 2216 s" }, { "step": "ruling", "text": "Sūrya Ṣaṣṭhī, Lu’an, 1990: Wednesday 24 October.", "fact": "confidence: boundary (tie-break-unstated)" } ], "rule": { "kind": "lunar", "id": "surya-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Nadi sasthi, Skanda sasthi (Madras), Surya sasthi, Chhat (Bihar)." } ], "kaala": "madhyahna", "priority": "unstated", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-10-24", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-25", "confidence": "boundary" } ], "quote": "In Lu’an, Sūrya Ṣaṣṭhī (Chhath) 1990 falls on Wednesday 24 October. Ṣaṣṭhī runs from 10:57 on Wed 24 Oct to 13:27 on Thu 25 Oct and covers all of madhyāhna that midday. It also reaches the next midday for 48 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.", "cite": "https://ahargana.org/lu-an/festivals/1990/surya-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/gopashtami", "festival": "gopashtami", "name": "Gopāṣṭamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-27", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 11607, "anga": { "type": "tithi", "index": 7, "key": "ashtami", "name": "Aṣṭamī", "start": { "local": "1990-10-26T15:35:14+08:00", "utc": "1990-10-26T07:35:14Z", "ms": 656926514359.4998 }, "end": { "local": "1990-10-27T17:07:07+08:00", "utc": "1990-10-27T09:07:07Z", "ms": 657018427428.284 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-26T15:35:14+08:00", "utc": "1990-10-26T07:35:14Z", "ms": 656926514359.4998 }, "end": { "local": "1990-10-27T17:07:07+08:00", "utc": "1990-10-27T09:07:07Z", "ms": 657018427428.284 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-10-26", "window": { "start": { "local": "1990-10-26T11:33:47+08:00", "utc": "1990-10-26T03:33:47Z", "ms": 656912027279.3994 }, "end": { "local": "1990-10-26T12:21:47+08:00", "utc": "1990-10-26T04:21:47Z", "ms": 656914907279.3994 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-10-27", "window": { "start": { "local": "1990-10-27T11:33:41+08:00", "utc": "1990-10-27T03:33:41Z", "ms": 656998421263.0452 }, "end": { "local": "1990-10-27T12:21:41+08:00", "utc": "1990-10-27T04:21:41Z", "ms": 657001301263.0452 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Aṣṭamī runs from 15:35 on Fri 26 Oct to 17:07 on Sat 27 Oct.", "fact": "1990-10-26T07:35:14Z → 1990-10-27T09:07:07Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 26th, 11:34–12:22 on the 27th.", "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 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: unstated → only-day · margin 11607 s" }, { "step": "ruling", "text": "Gopāṣṭamī, Lu’an, 1990: Saturday 27 October.", "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": "1990-10-27", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-27", "confidence": "determinate" } ], "quote": "In Lu’an, Gopāṣṭamī 1990 falls on Saturday 27 October. Aṣṭamī runs from 15:35 on Fri 26 Oct to 17:07 on Sat 27 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/gopashtami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/akshaya-navami", "festival": "akshaya-navami", "name": "Akṣaya Navamī", "everyday": "Amla Navami", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25202, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1990-10-27T17:07:07+08:00", "utc": "1990-10-27T09:07:07Z", "ms": 657018427428.284 }, "end": { "local": "1990-10-28T17:52:43+08:00", "utc": "1990-10-28T09:52:43Z", "ms": 657107563416.1548 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-27T17:07:07+08:00", "utc": "1990-10-27T09:07:07Z", "ms": 657018427428.284 }, "end": { "local": "1990-10-28T17:52:43+08:00", "utc": "1990-10-28T09:52:43Z", "ms": 657107563416.1548 } }, "kaala": "purvahna", "days": [ { "local_date": "1990-10-27", "window": { "start": { "local": "1990-10-27T06:25:54+08:00", "utc": "1990-10-26T22:25:54Z", "ms": 656979953878.1926 }, "end": { "local": "1990-10-27T10:07:05+08:00", "utc": "1990-10-27T02:07:05Z", "ms": 656993225468.0944 } }, "covered_min": 0, "window_min": 221, "qualifies": false }, { "local_date": "1990-10-28", "window": { "start": { "local": "1990-10-28T06:26:41+08:00", "utc": "1990-10-27T22:26:41Z", "ms": 657066401237.153 }, "end": { "local": "1990-10-28T10:07:18+08:00", "utc": "1990-10-28T02:07:18Z", "ms": 657079637726.4249 } }, "covered_min": 221, "window_min": 221, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 17:07 on Sat 27 Oct to 17:53 on Sun 28 Oct.", "fact": "1990-10-27T09:07:07Z → 1990-10-28T09:52:43Z" }, { "step": "kaala", "text": "Pūrvāhṇa is first 5 of 15 day muhūrtas: 06:26–10:07 on the 27th, 06:27–10:07 on the 28th.", "fact": "purvahna: day-muhurta-1-5 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Navamī must be present during pūrvāhṇa. It covers 0 of 221 minutes on the 27th and 221 of 221 on the 28th.", "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 25202 s" }, { "step": "ruling", "text": "Akṣaya Navamī, Lu’an, 1990: Sunday 28 October.", "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": "1990-10-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-28", "confidence": "determinate" } ], "quote": "In Lu’an, Akṣaya Navamī (Amla Navami) 1990 falls on Sunday 28 October. Navamī runs from 17:07 on Sat 27 Oct to 17:53 on Sun 28 Oct and covers all of pūrvāhṇa that forenoon.", "cite": "https://ahargana.org/lu-an/festivals/1990/akshaya-navami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/durga-navami", "festival": "durga-navami", "name": "Durgā Navamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 17126, "anga": { "type": "tithi", "index": 8, "key": "navami", "name": "Navamī", "start": { "local": "1990-10-27T17:07:07+08:00", "utc": "1990-10-27T09:07:07Z", "ms": 657018427428.284 }, "end": { "local": "1990-10-28T17:52:43+08:00", "utc": "1990-10-28T09:52:43Z", "ms": 657107563416.1548 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-27T17:07:07+08:00", "utc": "1990-10-27T09:07:07Z", "ms": 657018427428.284 }, "end": { "local": "1990-10-28T17:52:43+08:00", "utc": "1990-10-28T09:52:43Z", "ms": 657107563416.1548 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-10-27", "window": { "start": { "local": "1990-10-27T11:33:41+08:00", "utc": "1990-10-27T03:33:41Z", "ms": 656998421263.0452 }, "end": { "local": "1990-10-27T12:21:41+08:00", "utc": "1990-10-27T04:21:41Z", "ms": 657001301263.0452 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-10-28", "window": { "start": { "local": "1990-10-28T11:33:36+08:00", "utc": "1990-10-28T03:33:36Z", "ms": 657084815971.061 }, "end": { "local": "1990-10-28T12:21:36+08:00", "utc": "1990-10-28T04:21:36Z", "ms": 657087695971.061 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Navamī runs from 17:07 on Sat 27 Oct to 17:53 on Sun 28 Oct.", "fact": "1990-10-27T09:07:07Z → 1990-10-28T09:52:43Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 27th, 11:34–12:22 on the 28th.", "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 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: purvaviddha → only-day · margin 17126 s" }, { "step": "ruling", "text": "Durgā Navamī, Lu’an, 1990: Sunday 28 October.", "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": "1990-10-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-28", "confidence": "determinate" } ], "quote": "In Lu’an, Durgā Navamī 1990 falls on Sunday 28 October. Navamī runs from 17:07 on Sat 27 Oct to 17:53 on Sun 28 Oct and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/durga-navami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-10-30", "festival": "ekadashi", "name": "Prabodhinī Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 37069, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-10-29T17:46:04+08:00", "utc": "1990-10-29T09:46:04Z", "ms": 657193563823.1327 }, "end": { "local": "1990-10-30T16:46:06+08:00", "utc": "1990-10-30T08:46:06Z", "ms": 657276365701.5726 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-29T17:46:04+08:00", "utc": "1990-10-29T09:46:04Z", "ms": 657193563823.1327 }, "end": { "local": "1990-10-30T16:46:06+08:00", "utc": "1990-10-30T08:46:06Z", "ms": 657276365701.5726 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-10-29", "window": { "start": { "local": "1990-10-29T06:27:29+08:00", "utc": "1990-10-28T22:27:29Z", "ms": 657152848957.2522 }, "end": { "local": "1990-10-29T06:27:29+08:00", "utc": "1990-10-28T22:27:29Z", "ms": 657152848957.2522 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-10-30", "window": { "start": { "local": "1990-10-30T06:28:17+08:00", "utc": "1990-10-29T22:28:17Z", "ms": 657239297033.8368 }, "end": { "local": "1990-10-30T06:28:17+08:00", "utc": "1990-10-29T22:28:17Z", "ms": 657239297033.8368 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 17:46 on Mon 29 Oct to 16:46 on Tue 30 Oct.", "fact": "1990-10-29T09:46:04Z → 1990-10-30T08:46:06Z" }, { "step": "kaala", "text": "Sunrise is at 06:27 on the 29th and 06:28 on the 30th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 29th and is on the 30th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 37069 s" }, { "step": "ruling", "text": "Prabodhinī Ekādaśī, Lu’an, 1990: Tuesday 30 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": "1990-10-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-30", "confidence": "determinate" } ], "quote": "In Lu’an, Prabodhinī Ekādaśī 1990 falls on Tuesday 30 October. Ekādaśī runs from 17:46 on Mon 29 Oct to 16:46 on Tue 30 Oct and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-10-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-10-31", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-10-31", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8968, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-10-31T14:56:16+08:00", "utc": "1990-10-31T06:56:16Z", "ms": 657356175851.9945 }, "end": { "local": "1990-11-01T12:23:32+08:00", "utc": "1990-11-01T04:23:32Z", "ms": 657433412352.604 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-10-31T14:56:16+08:00", "utc": "1990-10-31T06:56:16Z", "ms": 657356175851.9945 }, "end": { "local": "1990-11-01T12:23:32+08:00", "utc": "1990-11-01T04:23:32Z", "ms": 657433412352.604 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-10-31", "window": { "start": { "local": "1990-10-31T17:25:44+08:00", "utc": "1990-10-31T09:25:44Z", "ms": 657365143666.8292 }, "end": { "local": "1990-10-31T19:10:17+08:00", "utc": "1990-10-31T11:10:17Z", "ms": 657371417076.4595 } }, "covered_min": 105, "window_min": 105, "qualifies": true }, { "local_date": "1990-11-01", "window": { "start": { "local": "1990-11-01T17:24:50+08:00", "utc": "1990-11-01T09:24:50Z", "ms": 657451490350.8268 }, "end": { "local": "1990-11-01T19:09:37+08:00", "utc": "1990-11-01T11:09:37Z", "ms": 657457777418.7186 } }, "covered_min": 0, "window_min": 105, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 14:56 on Wed 31 Oct to 12:24 on Thu 1 Nov.", "fact": "1990-10-31T06:56:16Z → 1990-11-01T04:23:32Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:26–19:10 on the 31st, 17:25–19:10 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 105 of 105 minutes on the 31st and 0 of 105 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 8968 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Wednesday 31 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": "1990-10-31", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-10-31", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Wednesday 31 October. Trayodaśī runs from 14:56 on Wed 31 Oct to 12:24 on Thu 1 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-10-31", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/kartiki-purnima", "festival": "kartiki-purnima", "name": "Kārtikī Pūrṇimā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8163, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-11-02T09:17:17+08:00", "utc": "1990-11-02T01:17:17Z", "ms": 657508637452.9213 }, "end": { "local": "1990-11-03T05:48:17+08:00", "utc": "1990-11-02T21:48:17Z", "ms": 657582497061.1998 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-11-02T09:17:17+08:00", "utc": "1990-11-02T01:17:17Z", "ms": 657508637452.9213 }, "end": { "local": "1990-11-03T05:48:17+08:00", "utc": "1990-11-02T21:48:17Z", "ms": 657582497061.1998 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-11-02", "window": { "start": { "local": "1990-11-02T11:33:21+08:00", "utc": "1990-11-02T03:33:21Z", "ms": 657516800813.8086 }, "end": { "local": "1990-11-02T12:21:21+08:00", "utc": "1990-11-02T04:21:21Z", "ms": 657519680813.8086 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-03", "window": { "start": { "local": "1990-11-03T11:33:20+08:00", "utc": "1990-11-03T03:33:20Z", "ms": 657603200135.0708 }, "end": { "local": "1990-11-03T12:21:20+08:00", "utc": "1990-11-03T04:21:20Z", "ms": 657606080135.0708 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 09:17 on Fri 2 Nov to 05:48 on Sat 3 Nov.", "fact": "1990-11-02T01:17:17Z → 1990-11-02T21:48:17Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:33–12:21 on the 2nd, 11:33–12:21 on the 3rd.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during madhyāhna. It covers 48 of 48 minutes on the 2nd and 0 of 48 on the 3rd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 8163 s" }, { "step": "ruling", "text": "Kārtikī Pūrṇimā, Lu’an, 1990: Friday 2 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": "1990-11-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-02", "confidence": "determinate" } ], "quote": "In Lu’an, Kārtikī Pūrṇimā 1990 falls on Friday 2 November. Pūrṇimā runs from 09:17 on Fri 2 Nov to 05:48 on Sat 3 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/kartiki-purnima", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/rasayatra", "festival": "rasayatra", "name": "Rāsayātrā", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-02", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 19592, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-11-02T09:17:17+08:00", "utc": "1990-11-02T01:17:17Z", "ms": 657508637452.9213 }, "end": { "local": "1990-11-03T05:48:17+08:00", "utc": "1990-11-02T21:48:17Z", "ms": 657582497061.1998 }, "month": { "amanta": 7, "purnimanta": 7, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Kārtika" } }, "span": { "of": "tithi", "start": { "local": "1990-11-02T09:17:17+08:00", "utc": "1990-11-02T01:17:17Z", "ms": 657508637452.9213 }, "end": { "local": "1990-11-03T05:48:17+08:00", "utc": "1990-11-02T21:48:17Z", "ms": 657582497061.1998 } }, "kaala": "nishita", "days": [ { "local_date": "1990-11-01", "window": { "start": { "local": "1990-11-01T23:33:47+08:00", "utc": "1990-11-01T15:33:47Z", "ms": 657473626855.4211 }, "end": { "local": "1990-11-02T00:21:47+08:00", "utc": "1990-11-01T16:21:47Z", "ms": 657476506855.4211 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-11-02", "window": { "start": { "local": "1990-11-02T23:33:46+08:00", "utc": "1990-11-02T15:33:46Z", "ms": 657560025544.6595 }, "end": { "local": "1990-11-03T00:21:46+08:00", "utc": "1990-11-02T16:21:46Z", "ms": 657562905544.6595 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 09:17 on Fri 2 Nov to 05:48 on Sat 3 Nov.", "fact": "1990-11-02T01:17:17Z → 1990-11-02T21:48:17Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:34–00:22 on the 1st, 23:34–00:22 on the 2nd.", "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 1st and 48 of 48 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 19592 s" }, { "step": "ruling", "text": "Rāsayātrā, Lu’an, 1990: Friday 2 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": "1990-11-02", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-02", "confidence": "determinate" } ], "quote": "In Lu’an, Rāsayātrā 1990 falls on Friday 2 November. Pūrṇimā runs from 09:17 on Fri 2 Nov to 05:48 on Sat 3 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/rasayatra", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-11-05", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 1254, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-11-05T18:57:27+08:00", "utc": "1990-11-05T10:57:27Z", "ms": 657802646956.2473 }, "end": { "local": "1990-11-06T15:47:50+08:00", "utc": "1990-11-06T07:47:50Z", "ms": 657877670363.7352 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-05T18:57:27+08:00", "utc": "1990-11-05T10:57:27Z", "ms": 657802646956.2473 }, "end": { "local": "1990-11-06T15:47:50+08:00", "utc": "1990-11-06T07:47:50Z", "ms": 657877670363.7352 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-11-05", "window": { "start": { "local": "1990-11-05T19:18:21+08:00", "utc": "1990-11-05T11:18:21Z", "ms": 657803901208.2616 }, "end": { "local": "1990-11-05T19:18:21+08:00", "utc": "1990-11-05T11:18:21Z", "ms": 657803901208.2616 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-11-06", "window": { "start": { "local": "1990-11-06T20:25:25+08:00", "utc": "1990-11-06T12:25:25Z", "ms": 657894325244.7628 }, "end": { "local": "1990-11-06T20:25:25+08:00", "utc": "1990-11-06T12:25:25Z", "ms": 657894325244.7628 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 18:57 on Mon 5 Nov to 15:48 on Tue 6 Nov.", "fact": "1990-11-05T10:57:27Z → 1990-11-06T07:47:50Z" }, { "step": "kaala", "text": "Moonrise is at 19:18 on the 5th and 20:25 on the 6th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is on the 5th and is not on the 6th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one moonrise qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 1254 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Monday 5 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": "1990-11-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-05", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Monday 5 November. Caturthī runs from 18:57 on Mon 5 Nov to 15:48 on Tue 6 Nov and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-11-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-11-13", "festival": "ekadashi", "name": "Utpannā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-13", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 8068, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-11-12T08:53:40+08:00", "utc": "1990-11-12T00:53:40Z", "ms": 658371219772.261 }, "end": { "local": "1990-11-13T09:47:12+08:00", "utc": "1990-11-13T01:47:12Z", "ms": 658460832048.6173 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-12T08:53:40+08:00", "utc": "1990-11-12T00:53:40Z", "ms": 658371219772.261 }, "end": { "local": "1990-11-13T09:47:12+08:00", "utc": "1990-11-13T01:47:12Z", "ms": 658460832048.6173 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-11-12", "window": { "start": { "local": "1990-11-12T06:39:12+08:00", "utc": "1990-11-11T22:39:12Z", "ms": 658363151933.8994 }, "end": { "local": "1990-11-12T06:39:12+08:00", "utc": "1990-11-11T22:39:12Z", "ms": 658363151933.8994 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-11-13", "window": { "start": { "local": "1990-11-13T06:40:04+08:00", "utc": "1990-11-12T22:40:04Z", "ms": 658449604210.2839 }, "end": { "local": "1990-11-13T06:40:04+08:00", "utc": "1990-11-12T22:40:04Z", "ms": 658449604210.2839 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 08:54 on Mon 12 Nov to 09:47 on Tue 13 Nov.", "fact": "1990-11-12T00:53:40Z → 1990-11-13T01:47:12Z" }, { "step": "kaala", "text": "Sunrise is at 06:39 on the 12th and 06:40 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 8068 s" }, { "step": "ruling", "text": "Utpannā Ekādaśī, Lu’an, 1990: Tuesday 13 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": "1990-11-13", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-13", "confidence": "determinate" } ], "quote": "In Lu’an, Utpannā Ekādaśī 1990 falls on Tuesday 13 November. Ekādaśī runs from 08:54 on Mon 12 Nov to 09:47 on Tue 13 Nov and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-11-13", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-11-14", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15999, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-11-14T11:06:41+08:00", "utc": "1990-11-14T03:06:41Z", "ms": 658552000597.5243 }, "end": { "local": "1990-11-15T12:48:09+08:00", "utc": "1990-11-15T04:48:09Z", "ms": 658644488532.7517 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-14T11:06:41+08:00", "utc": "1990-11-14T03:06:41Z", "ms": 658552000597.5243 }, "end": { "local": "1990-11-15T12:48:09+08:00", "utc": "1990-11-15T04:48:09Z", "ms": 658644488532.7517 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-11-14", "window": { "start": { "local": "1990-11-14T17:15:21+08:00", "utc": "1990-11-14T09:15:21Z", "ms": 658574120545.94 }, "end": { "local": "1990-11-14T19:02:52+08:00", "utc": "1990-11-14T11:02:52Z", "ms": 658580572372.3402 } }, "covered_min": 108, "window_min": 108, "qualifies": true }, { "local_date": "1990-11-15", "window": { "start": { "local": "1990-11-15T17:14:47+08:00", "utc": "1990-11-15T09:14:47Z", "ms": 658660487165.9403 }, "end": { "local": "1990-11-15T19:02:30+08:00", "utc": "1990-11-15T11:02:30Z", "ms": 658666950469.497 } }, "covered_min": 0, "window_min": 108, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 11:07 on Wed 14 Nov to 12:48 on Thu 15 Nov.", "fact": "1990-11-14T03:06:41Z → 1990-11-15T04:48:09Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:15–19:03 on the 14th, 17:15–19:03 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 108 of 108 minutes on the 14th and 0 of 108 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 15999 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Wednesday 14 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": "1990-11-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-14", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Wednesday 14 November. Trayodaśī runs from 11:07 on Wed 14 Nov to 12:48 on Thu 15 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-11-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-11-15", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 31593, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-11-15T12:48:09+08:00", "utc": "1990-11-15T04:48:09Z", "ms": 658644488532.7517 }, "end": { "local": "1990-11-16T14:48:22+08:00", "utc": "1990-11-16T06:48:22Z", "ms": 658738102000.8453 }, "month": { "amanta": 7, "purnimanta": 8, "adhika": false, "amanta_name": "Kārtika", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-15T12:48:09+08:00", "utc": "1990-11-15T04:48:09Z", "ms": 658644488532.7517 }, "end": { "local": "1990-11-16T14:48:22+08:00", "utc": "1990-11-16T06:48:22Z", "ms": 658738102000.8453 } }, "kaala": "nishita", "days": [ { "local_date": "1990-11-15", "window": { "start": { "local": "1990-11-15T23:34:45+08:00", "utc": "1990-11-15T15:34:45Z", "ms": 658683284554.2778 }, "end": { "local": "1990-11-16T00:22:45+08:00", "utc": "1990-11-15T16:22:45Z", "ms": 658686164554.2778 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-16", "window": { "start": { "local": "1990-11-16T23:34:55+08:00", "utc": "1990-11-16T15:34:55Z", "ms": 658769695056.2831 }, "end": { "local": "1990-11-17T00:22:55+08:00", "utc": "1990-11-16T16:22:55Z", "ms": 658772575056.2831 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 12:48 on Thu 15 Nov to 14:48 on Fri 16 Nov.", "fact": "1990-11-15T04:48:09Z → 1990-11-16T06:48:22Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:35–00:23 on the 15th, 23:35–00:23 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 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 31593 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Thursday 15 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": "1990-11-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-15", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Thursday 15 November. Caturdaśī runs from 12:48 on Thu 15 Nov to 14:48 on Fri 16 Nov and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-11-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-11-21", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 29266, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-11-21T00:52:44+08:00", "utc": "1990-11-20T16:52:44Z", "ms": 659119963673.518 }, "end": { "local": "1990-11-22T03:28:03+08:00", "utc": "1990-11-21T19:28:03Z", "ms": 659215683183.1089 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-21T00:52:44+08:00", "utc": "1990-11-20T16:52:44Z", "ms": 659119963673.518 }, "end": { "local": "1990-11-22T03:28:03+08:00", "utc": "1990-11-21T19:28:03Z", "ms": 659215683183.1089 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-11-21", "window": { "start": { "local": "1990-11-21T11:35:34+08:00", "utc": "1990-11-21T03:35:34Z", "ms": 659158533569.4467 }, "end": { "local": "1990-11-21T12:23:34+08:00", "utc": "1990-11-21T04:23:34Z", "ms": 659161413569.4467 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-22", "window": { "start": { "local": "1990-11-22T11:35:49+08:00", "utc": "1990-11-22T03:35:49Z", "ms": 659244948995.6667 }, "end": { "local": "1990-11-22T12:23:49+08:00", "utc": "1990-11-22T04:23:49Z", "ms": 659247828995.6667 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 00:53 on Wed 21 Nov to 03:28 on Thu 22 Nov.", "fact": "1990-11-20T16:52:44Z → 1990-11-21T19:28:03Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 21st, 11:36–12:24 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 29266 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Wednesday 21 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": "1990-11-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-21", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Wednesday 21 November. Caturthī runs from 00:53 on Wed 21 Nov to 03:28 on Thu 22 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-11-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/naga-panchami-margashirsha", "festival": "naga-panchami-margashirsha", "name": "Nāga Pañcamī (Mārgaśīrṣa)", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-22", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20927, "anga": { "type": "tithi", "index": 4, "key": "panchami", "name": "Pañcamī", "start": { "local": "1990-11-22T03:28:03+08:00", "utc": "1990-11-21T19:28:03Z", "ms": 659215683183.1089 }, "end": { "local": "1990-11-23T05:47:18+08:00", "utc": "1990-11-22T21:47:18Z", "ms": 659310438152.2098 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-22T03:28:03+08:00", "utc": "1990-11-21T19:28:03Z", "ms": 659215683183.1089 }, "end": { "local": "1990-11-23T05:47:18+08:00", "utc": "1990-11-22T21:47:18Z", "ms": 659310438152.2098 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-11-22", "window": { "start": { "local": "1990-11-22T11:35:49+08:00", "utc": "1990-11-22T03:35:49Z", "ms": 659244948995.6667 }, "end": { "local": "1990-11-22T12:23:49+08:00", "utc": "1990-11-22T04:23:49Z", "ms": 659247828995.6667 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-23", "window": { "start": { "local": "1990-11-23T11:36:05+08:00", "utc": "1990-11-23T03:36:05Z", "ms": 659331365208.564 }, "end": { "local": "1990-11-23T12:24:05+08:00", "utc": "1990-11-23T04:24:05Z", "ms": 659334245208.564 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Pañcamī runs from 03:28 on Thu 22 Nov to 05:47 on Fri 23 Nov.", "fact": "1990-11-21T19:28:03Z → 1990-11-22T21:47:18Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 22nd, 11:36–12:24 on the 23rd.", "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 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: paraviddha → only-day · margin 20927 s" }, { "step": "ruling", "text": "Nāga Pañcamī (Mārgaśīrṣa), Lu’an, 1990: Thursday 22 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "naga-panchami-margashirsha", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 5 Naga pancami (2nd) (paraviddha)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-11-22", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-22", "confidence": "determinate" } ], "quote": "In Lu’an, Nāga Pañcamī (Mārgaśīrṣa) 1990 falls on Thursday 22 November. Pañcamī runs from 03:28 on Thu 22 Nov to 05:47 on Fri 23 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/naga-panchami-margashirsha", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/champa-shashthi", "festival": "champa-shashthi", "name": "Campā Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14245, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-11-23T05:47:18+08:00", "utc": "1990-11-22T21:47:18Z", "ms": 659310438152.2098 }, "end": { "local": "1990-11-24T07:38:57+08:00", "utc": "1990-11-23T23:38:57Z", "ms": 659403537030.137 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-23T05:47:18+08:00", "utc": "1990-11-22T21:47:18Z", "ms": 659310438152.2098 }, "end": { "local": "1990-11-24T07:38:57+08:00", "utc": "1990-11-23T23:38:57Z", "ms": 659403537030.137 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-11-23", "window": { "start": { "local": "1990-11-23T11:36:05+08:00", "utc": "1990-11-23T03:36:05Z", "ms": 659331365208.564 }, "end": { "local": "1990-11-23T12:24:05+08:00", "utc": "1990-11-23T04:24:05Z", "ms": 659334245208.564 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-24", "window": { "start": { "local": "1990-11-24T11:36:22+08:00", "utc": "1990-11-24T03:36:22Z", "ms": 659417782194.24 }, "end": { "local": "1990-11-24T12:24:22+08:00", "utc": "1990-11-24T04:24:22Z", "ms": 659420662194.24 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 05:47 on Fri 23 Nov to 07:39 on Sat 24 Nov.", "fact": "1990-11-22T21:47:18Z → 1990-11-23T23:38:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 23rd, 11:36–12:24 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 23rd and 0 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 14245 s" }, { "step": "ruling", "text": "Campā Ṣaṣṭhī, Lu’an, 1990: Friday 23 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "champa-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Campa sasthi (Maharashtra) (paraviddha). (Special when combined with naksatra Satabhisaj, yoga Vyatipata and Sunday), Skanda sasthi (purvaviddha), Guha sasthi" } ], "not_evaluated": "The row calls the day special with Śatabhiṣaj nakṣatra, Vyatīpāta yoga and a Sunday; none is tested.", "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-11-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-23", "confidence": "determinate" } ], "quote": "In Lu’an, Campā Ṣaṣṭhī 1990 falls on Friday 23 November. Ṣaṣṭhī runs from 05:47 on Fri 23 Nov to 07:39 on Sat 24 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/champa-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/skanda-shashthi", "festival": "skanda-shashthi", "name": "Skanda Ṣaṣṭhī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-23", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14245, "anga": { "type": "tithi", "index": 5, "key": "shashthi", "name": "Ṣaṣṭhī", "start": { "local": "1990-11-23T05:47:18+08:00", "utc": "1990-11-22T21:47:18Z", "ms": 659310438152.2098 }, "end": { "local": "1990-11-24T07:38:57+08:00", "utc": "1990-11-23T23:38:57Z", "ms": 659403537030.137 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-23T05:47:18+08:00", "utc": "1990-11-22T21:47:18Z", "ms": 659310438152.2098 }, "end": { "local": "1990-11-24T07:38:57+08:00", "utc": "1990-11-23T23:38:57Z", "ms": 659403537030.137 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-11-23", "window": { "start": { "local": "1990-11-23T11:36:05+08:00", "utc": "1990-11-23T03:36:05Z", "ms": 659331365208.564 }, "end": { "local": "1990-11-23T12:24:05+08:00", "utc": "1990-11-23T04:24:05Z", "ms": 659334245208.564 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-24", "window": { "start": { "local": "1990-11-24T11:36:22+08:00", "utc": "1990-11-24T03:36:22Z", "ms": 659417782194.24 }, "end": { "local": "1990-11-24T12:24:22+08:00", "utc": "1990-11-24T04:24:22Z", "ms": 659420662194.24 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ṣaṣṭhī runs from 05:47 on Fri 23 Nov to 07:39 on Sat 24 Nov.", "fact": "1990-11-22T21:47:18Z → 1990-11-23T23:38:57Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 23rd, 11:36–12:24 on the 24th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ṣaṣṭhī must be present during madhyāhna. It covers 48 of 48 minutes on the 23rd and 0 of 48 on the 24th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 14245 s" }, { "step": "ruling", "text": "Skanda Ṣaṣṭhī, Lu’an, 1990: Friday 23 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "skanda-shashthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 6 Campa sasthi (Maharashtra) (paraviddha). (Special when combined with naksatra Satabhisaj, yoga Vyatipata and Sunday), Skanda sasthi (purvaviddha), Guha sasthi" } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-11-23", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-23", "confidence": "determinate" } ], "quote": "In Lu’an, Skanda Ṣaṣṭhī 1990 falls on Friday 23 November. Ṣaṣṭhī runs from 05:47 on Fri 23 Nov to 07:39 on Sat 24 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/skanda-shashthi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/mitra-saptami", "festival": "mitra-saptami", "name": "Mitra Saptamī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-24", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 9872, "anga": { "type": "tithi", "index": 6, "key": "saptami", "name": "Saptamī", "start": { "local": "1990-11-24T07:38:57+08:00", "utc": "1990-11-23T23:38:57Z", "ms": 659403537030.137 }, "end": { "local": "1990-11-25T08:52:08+08:00", "utc": "1990-11-25T00:52:08Z", "ms": 659494327600.698 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-24T07:38:57+08:00", "utc": "1990-11-23T23:38:57Z", "ms": 659403537030.137 }, "end": { "local": "1990-11-25T08:52:08+08:00", "utc": "1990-11-25T00:52:08Z", "ms": 659494327600.698 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-11-24", "window": { "start": { "local": "1990-11-24T11:36:22+08:00", "utc": "1990-11-24T03:36:22Z", "ms": 659417782194.24 }, "end": { "local": "1990-11-24T12:24:22+08:00", "utc": "1990-11-24T04:24:22Z", "ms": 659420662194.24 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-25", "window": { "start": { "local": "1990-11-25T11:36:40+08:00", "utc": "1990-11-25T03:36:40Z", "ms": 659504199938.1157 }, "end": { "local": "1990-11-25T12:24:40+08:00", "utc": "1990-11-25T04:24:40Z", "ms": 659507079938.1157 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Saptamī runs from 07:39 on Sat 24 Nov to 08:52 on Sun 25 Nov.", "fact": "1990-11-23T23:38:57Z → 1990-11-25T00:52:08Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 24th, 11:37–12:25 on the 25th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Saptamī must be present during madhyāhna. It covers 48 of 48 minutes on the 24th and 0 of 48 on the 25th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: purvaviddha → only-day · margin 9872 s" }, { "step": "ruling", "text": "Mitra Saptamī, Lu’an, 1990: Saturday 24 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "mitra-saptami", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 7 Mitra saptami (purvaviddha)." } ], "kaala": "madhyahna", "priority": "purvaviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-11-24", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-24", "confidence": "determinate" } ], "quote": "In Lu’an, Mitra Saptamī 1990 falls on Saturday 24 November. Saptamī runs from 07:39 on Sat 24 Nov to 08:52 on Sun 25 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/mitra-saptami", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-11-28", "festival": "ekadashi", "name": "Mokṣadā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 2558, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-11-28T07:35:49+08:00", "utc": "1990-11-27T23:35:49Z", "ms": 659748948619.514 }, "end": { "local": "1990-11-29T05:30:09+08:00", "utc": "1990-11-28T21:30:09Z", "ms": 659827808784.6313 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-28T07:35:49+08:00", "utc": "1990-11-27T23:35:49Z", "ms": 659748948619.514 }, "end": { "local": "1990-11-29T05:30:09+08:00", "utc": "1990-11-28T21:30:09Z", "ms": 659827808784.6313 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-11-28", "window": { "start": { "local": "1990-11-28T06:53:10+08:00", "utc": "1990-11-27T22:53:10Z", "ms": 659746390294.9961 }, "end": { "local": "1990-11-28T06:53:10+08:00", "utc": "1990-11-27T22:53:10Z", "ms": 659746390294.9961 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-11-29", "window": { "start": { "local": "1990-11-29T06:54:01+08:00", "utc": "1990-11-28T22:54:01Z", "ms": 659832841167.191 }, "end": { "local": "1990-11-29T06:54:01+08:00", "utc": "1990-11-28T22:54:01Z", "ms": 659832841167.191 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 07:36 on Wed 28 Nov to 05:30 on Thu 29 Nov.", "fact": "1990-11-27T23:35:49Z → 1990-11-28T21:30:09Z" }, { "step": "kaala", "text": "Sunrise is at 06:53 on the 28th and 06:54 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 not on the 29th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Neither sunrise qualifies. The day the tithi falls on is taken.", "fact": "priority: paraviddha → tithi-day · margin 2558 s" }, { "step": "ruling", "text": "Mokṣadā Ekādaśī, Lu’an, 1990: Wednesday 28 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": "1990-11-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-28", "confidence": "determinate" } ], "quote": "In Lu’an, Mokṣadā Ekādaśī 1990 falls on Wednesday 28 November. Ekādaśī runs from 07:36 on Wed 28 Nov to 05:30 on Thu 29 Nov, and is current at sunrise on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-11-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/akhanda-dvadashi", "festival": "akhanda-dvadashi", "name": "Akhaṇḍa Dvādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 22069, "anga": { "type": "tithi", "index": 11, "key": "dvadashi", "name": "Dvādaśī", "start": { "local": "1990-11-29T05:30:09+08:00", "utc": "1990-11-28T21:30:09Z", "ms": 659827808784.6313 }, "end": { "local": "1990-11-30T02:42:56+08:00", "utc": "1990-11-29T18:42:56Z", "ms": 659904176281.5013 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-29T05:30:09+08:00", "utc": "1990-11-28T21:30:09Z", "ms": 659827808784.6313 }, "end": { "local": "1990-11-30T02:42:56+08:00", "utc": "1990-11-29T18:42:56Z", "ms": 659904176281.5013 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-11-29", "window": { "start": { "local": "1990-11-29T11:37:58+08:00", "utc": "1990-11-29T03:37:58Z", "ms": 659849878188.0596 }, "end": { "local": "1990-11-29T12:25:58+08:00", "utc": "1990-11-29T04:25:58Z", "ms": 659852758188.0596 } }, "covered_min": 48, "window_min": 48, "qualifies": true }, { "local_date": "1990-11-30", "window": { "start": { "local": "1990-11-30T11:38:19+08:00", "utc": "1990-11-30T03:38:19Z", "ms": 659936299490.8508 }, "end": { "local": "1990-11-30T12:26:19+08:00", "utc": "1990-11-30T04:26:19Z", "ms": 659939179490.8508 } }, "covered_min": 0, "window_min": 48, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Dvādaśī runs from 05:30 on Thu 29 Nov to 02:43 on Fri 30 Nov.", "fact": "1990-11-28T21:30:09Z → 1990-11-29T18:42:56Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 29th, 11:38–12:26 on the 30th.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Dvādaśī must be present during madhyāhna. It covers 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. 104" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 22069 s" }, { "step": "ruling", "text": "Akhaṇḍa Dvādaśī, Lu’an, 1990: Thursday 29 November.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "akhanda-dvadashi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 12 Matsya dvadasi, Akhanda dvadasi (paraviddha), Vyanjana dvadasi & Dana dvadasi (Orissa)." } ], "kaala": "madhyahna", "priority": "paraviddha", "when_absent": "second-day" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-11-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-29", "confidence": "determinate" } ], "quote": "In Lu’an, Akhaṇḍa Dvādaśī 1990 falls on Thursday 29 November. Dvādaśī runs from 05:30 on Thu 29 Nov to 02:43 on Fri 30 Nov and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/akhanda-dvadashi", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-11-30", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-11-30", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 15804, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-11-30T02:42:56+08:00", "utc": "1990-11-29T18:42:56Z", "ms": 659904176281.5013 }, "end": { "local": "1990-11-30T23:23:19+08:00", "utc": "1990-11-30T15:23:19Z", "ms": 659978598710.2668 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-11-30T02:42:56+08:00", "utc": "1990-11-29T18:42:56Z", "ms": 659904176281.5013 }, "end": { "local": "1990-11-30T23:23:19+08:00", "utc": "1990-11-30T15:23:19Z", "ms": 659978598710.2668 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-11-29", "window": { "start": { "local": "1990-11-29T17:09:55+08:00", "utc": "1990-11-29T09:09:55Z", "ms": 659869795208.9281 }, "end": { "local": "1990-11-29T18:59:55+08:00", "utc": "1990-11-29T10:59:55Z", "ms": 659876394731.4501 } }, "covered_min": 0, "window_min": 110, "qualifies": false }, { "local_date": "1990-11-30", "window": { "start": { "local": "1990-11-30T17:09:47+08:00", "utc": "1990-11-30T09:09:47Z", "ms": 659956187353.8593 }, "end": { "local": "1990-11-30T18:59:55+08:00", "utc": "1990-11-30T10:59:55Z", "ms": 659962794591.956 } }, "covered_min": 110, "window_min": 110, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 02:43 on Fri 30 Nov to 23:23 on Fri 30 Nov.", "fact": "1990-11-29T18:42:56Z → 1990-11-30T15:23:19Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:10–19:00 on the 29th, 17:10–19:00 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 110 minutes on the 29th and 110 of 110 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 15804 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Friday 30 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": "1990-11-30", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-11-30", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Friday 30 November. Trayodaśī runs from 02:43 on Fri 30 Nov to 23:23 on Fri 30 Nov and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-11-30", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/dattatreyotpatti", "festival": "dattatreyotpatti", "name": "Dattātreyotpatti", "everyday": "Datta Jayanti", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-01", "confidence": "boundary", "boundary_reasons": [ "absent-unstated" ], "boundary_margin_s": 2513, "anga": { "type": "tithi", "index": 14, "key": "purnima", "name": "Pūrṇimā", "start": { "local": "1990-12-01T19:41:48+08:00", "utc": "1990-12-01T11:41:48Z", "ms": 660051708478.8083 }, "end": { "local": "1990-12-02T15:49:40+08:00", "utc": "1990-12-02T07:49:40Z", "ms": 660124179874.4873 }, "month": { "amanta": 8, "purnimanta": 8, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Mārgaśīrṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-01T19:41:48+08:00", "utc": "1990-12-01T11:41:48Z", "ms": 660051708478.8083 }, "end": { "local": "1990-12-02T15:49:40+08:00", "utc": "1990-12-02T07:49:40Z", "ms": 660124179874.4873 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-12-01", "window": { "start": { "local": "1990-12-01T17:09:41+08:00", "utc": "1990-12-01T09:09:41Z", "ms": 660042581277.8093 }, "end": { "local": "1990-12-01T18:59:56+08:00", "utc": "1990-12-01T10:59:56Z", "ms": 660049195929.4813 } }, "covered_min": 0, "window_min": 110, "qualifies": false }, { "local_date": "1990-12-02", "window": { "start": { "local": "1990-12-02T17:09:37+08:00", "utc": "1990-12-02T09:09:37Z", "ms": 660128976986.8403 }, "end": { "local": "1990-12-02T18:59:59+08:00", "utc": "1990-12-02T10:59:59Z", "ms": 660135598744.4419 } }, "covered_min": 0, "window_min": 110, "qualifies": false } ], "decided_by": "tithi-day", "explanation": [ { "step": "anga", "text": "Pūrṇimā runs from 19:42 on Sat 1 Dec to 15:50 on Sun 2 Dec.", "fact": "1990-12-01T11:41:48Z → 1990-12-02T07:49:40Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:10–19:00 on the 1st, 17:10–19:00 on the 2nd.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Pūrṇimā must be present during pradoṣa. It covers 0 of 110 minutes on the 1st and 0 of 110 on the 2nd.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104" }, { "step": "tie_break", "text": "Neither evening qualifies. The day the tithi falls on is taken.", "fact": "priority: unstated → tithi-day · margin 2513 s" }, { "step": "ruling", "text": "Dattātreyotpatti, Lu’an, 1990: Saturday 1 December.", "fact": "confidence: boundary (absent-unstated)" } ], "rule": { "kind": "lunar", "id": "dattatreyotpatti", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 104", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "S 15 Dattatreyotpatti (pradosa)." } ], "kaala": "pradosha", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-12-01", "confidence": "boundary" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-01", "confidence": "determinate" } ], "quote": "In Lu’an, Dattātreyotpatti (Datta Jayanti) 1990 falls on Saturday 1 December. Pūrṇimā runs from 19:42 on Sat 1 Dec to 15:50 on Sun 2 Dec, and reaches pradoṣa on neither day.", "cite": "https://ahargana.org/lu-an/festivals/1990/dattatreyotpatti", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/sankashta-chaturthi?on=1990-12-05", "festival": "sankashta-chaturthi", "name": "Saṅkaṣṭa Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-05", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 20935, "anga": { "type": "tithi", "index": 18, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-12-05T05:01:12+08:00", "utc": "1990-12-04T21:01:12Z", "ms": 660344471714.6097 }, "end": { "local": "1990-12-06T02:14:58+08:00", "utc": "1990-12-05T18:14:58Z", "ms": 660420898132.3242 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-05T05:01:12+08:00", "utc": "1990-12-04T21:01:12Z", "ms": 660344471714.6097 }, "end": { "local": "1990-12-06T02:14:58+08:00", "utc": "1990-12-05T18:14:58Z", "ms": 660420898132.3242 } }, "kaala": "moonrise", "days": [ { "local_date": "1990-12-04", "window": { "start": { "local": "1990-12-04T19:14:08+08:00", "utc": "1990-12-04T11:14:08Z", "ms": 660309248124.6 }, "end": { "local": "1990-12-04T19:14:08+08:00", "utc": "1990-12-04T11:14:08Z", "ms": 660309248124.6 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-12-05", "window": { "start": { "local": "1990-12-05T20:26:04+08:00", "utc": "1990-12-05T12:26:04Z", "ms": 660399963624.4955 }, "end": { "local": "1990-12-05T20:26:04+08:00", "utc": "1990-12-05T12:26:04Z", "ms": 660399963624.4955 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 05:01 on Wed 5 Dec to 02:15 on Thu 6 Dec.", "fact": "1990-12-04T21:01:12Z → 1990-12-05T18:14:58Z" }, { "step": "kaala", "text": "Moonrise is at 19:14 on the 4th and 20:26 on the 5th.", "fact": "moonrise: disc centre, 31′" }, { "step": "rule", "text": "Caturthī must be current at moonrise. It is not on the 4th and is 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 20935 s" }, { "step": "ruling", "text": "Saṅkaṣṭa Caturthī, Lu’an, 1990: Wednesday 5 December.", "fact": "confidence: determinate" } ], "rule": { "kind": "lunar", "id": "sankashta-chaturthi", "references": [ { "text": "Calendar Reform Committee 1955, General Rules for Religious Festivals", "locator": "p. 108", "url": "https://archive.org/details/calendar_reform_comittee_report", "quote": "The sukla caturthi in each month is called Ganesa caturthi or Vinayaka caturthi. It is observed at madhyahna. The chief among them are caturthis of Bhadrapada and Magha. Similarly the krsna caturthi in each month is called Sankasta caturthi, to be observed on the day when the tithi is current at moonrise. It is called Angaraka caturthi if it falls on Tuesday." } ], "not_evaluated": "It is called Aṅgāraka Caturthī when it falls on a Tuesday; the weekday is not tested.", "kaala": "moonrise", "priority": "unstated", "when_absent": "unstated" }, "alternatives": [ { "kind": "profile", "profile": "classical@2026.1", "local_date": "1990-12-05", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-05", "confidence": "determinate" } ], "quote": "In Lu’an, Saṅkaṣṭa Caturthī 1990 falls on Wednesday 5 December. Caturthī runs from 05:01 on Wed 5 Dec to 02:15 on Thu 6 Dec and is current at moonrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/sankashta-chaturthi?on=1990-12-05", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-12-12", "festival": "ekadashi", "name": "Saphalā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-12", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 16973, "anga": { "type": "tithi", "index": 25, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-12-12T00:27:58+08:00", "utc": "1990-12-11T16:27:58Z", "ms": 660932877742.0157 }, "end": { "local": "1990-12-13T02:21:59+08:00", "utc": "1990-12-12T18:21:59Z", "ms": 661026119431.5289 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-12T00:27:58+08:00", "utc": "1990-12-11T16:27:58Z", "ms": 660932877742.0157 }, "end": { "local": "1990-12-13T02:21:59+08:00", "utc": "1990-12-12T18:21:59Z", "ms": 661026119431.5289 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-12-12", "window": { "start": { "local": "1990-12-12T07:04:11+08:00", "utc": "1990-12-11T23:04:11Z", "ms": 660956650961.888 }, "end": { "local": "1990-12-12T07:04:11+08:00", "utc": "1990-12-11T23:04:11Z", "ms": 660956650961.888 } }, "covered_min": 1, "window_min": 0, "qualifies": true }, { "local_date": "1990-12-13", "window": { "start": { "local": "1990-12-13T07:04:52+08:00", "utc": "1990-12-12T23:04:52Z", "ms": 661043092436.0718 }, "end": { "local": "1990-12-13T07:04:52+08:00", "utc": "1990-12-12T23:04:52Z", "ms": 661043092436.0718 } }, "covered_min": 0, "window_min": 0, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 00:28 on Wed 12 Dec to 02:22 on Thu 13 Dec.", "fact": "1990-12-11T16:27:58Z → 1990-12-12T18:21:59Z" }, { "step": "kaala", "text": "Sunrise is at 07:04 on the 12th and 07:05 on the 13th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is on the 12th and is not on the 13th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105" }, { "step": "tie_break", "text": "Only one sunrise qualifies. No tie-break is needed.", "fact": "priority: paraviddha → only-day · margin 16973 s" }, { "step": "ruling", "text": "Saphalā Ekādaśī, Lu’an, 1990: Wednesday 12 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": "1990-12-12", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-12", "confidence": "determinate" } ], "quote": "In Lu’an, Saphalā Ekādaśī 1990 falls on Wednesday 12 December. Ekādaśī runs from 00:28 on Wed 12 Dec to 02:22 on Thu 13 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-12-12", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-12-14", "festival": "pradosha-vrata", "name": "Kṛṣṇa Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-14", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 34501, "anga": { "type": "tithi", "index": 27, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-12-14T04:37:07+08:00", "utc": "1990-12-13T20:37:07Z", "ms": 661120627322.9088 }, "end": { "local": "1990-12-15T07:06:13+08:00", "utc": "1990-12-14T23:06:13Z", "ms": 661215972588.6982 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-14T04:37:07+08:00", "utc": "1990-12-13T20:37:07Z", "ms": 661120627322.9088 }, "end": { "local": "1990-12-15T07:06:13+08:00", "utc": "1990-12-14T23:06:13Z", "ms": 661215972588.6982 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-12-13", "window": { "start": { "local": "1990-12-13T17:10:48+08:00", "utc": "1990-12-13T09:10:48Z", "ms": 661079447843.2952 }, "end": { "local": "1990-12-13T19:02:06+08:00", "utc": "1990-12-13T11:02:06Z", "ms": 661086125851.8383 } }, "covered_min": 0, "window_min": 111, "qualifies": false }, { "local_date": "1990-12-14", "window": { "start": { "local": "1990-12-14T17:11:05+08:00", "utc": "1990-12-14T09:11:05Z", "ms": 661165864807.127 }, "end": { "local": "1990-12-14T19:02:26+08:00", "utc": "1990-12-14T11:02:26Z", "ms": 661172545810.1017 } }, "covered_min": 111, "window_min": 111, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 04:37 on Fri 14 Dec to 07:06 on Sat 15 Dec.", "fact": "1990-12-13T20:37:07Z → 1990-12-14T23:06:13Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:11–19:02 on the 13th, 17:11–19:02 on the 14th.", "fact": "pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Trayodaśī must be present during pradoṣa. It covers 0 of 111 minutes on the 13th and 111 of 111 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 34501 s" }, { "step": "ruling", "text": "Kṛṣṇa Pradoṣa Vrata, Lu’an, 1990: Friday 14 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": "1990-12-14", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-14", "confidence": "determinate" } ], "quote": "In Lu’an, Kṛṣṇa Pradoṣa Vrata 1990 falls on Friday 14 December. Trayodaśī runs from 04:37 on Fri 14 Dec to 07:06 on Sat 15 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-12-14", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/shivaratri?on=1990-12-15", "festival": "shivaratri", "name": "Śivarātri", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-15", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 23614, "anga": { "type": "tithi", "index": 28, "key": "chaturdashi", "name": "Caturdaśī", "start": { "local": "1990-12-15T07:06:13+08:00", "utc": "1990-12-14T23:06:13Z", "ms": 661215972588.6982 }, "end": { "local": "1990-12-16T09:42:56+08:00", "utc": "1990-12-16T01:42:56Z", "ms": 661311775718.7609 }, "month": { "amanta": 8, "purnimanta": 9, "adhika": false, "amanta_name": "Mārgaśīrṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-15T07:06:13+08:00", "utc": "1990-12-14T23:06:13Z", "ms": 661215972588.6982 }, "end": { "local": "1990-12-16T09:42:56+08:00", "utc": "1990-12-16T01:42:56Z", "ms": 661311775718.7609 } }, "kaala": "nishita", "days": [ { "local_date": "1990-12-14", "window": { "start": { "local": "1990-12-14T23:44:39+08:00", "utc": "1990-12-14T15:44:39Z", "ms": 661189478568.2822 }, "end": { "local": "1990-12-15T00:32:39+08:00", "utc": "1990-12-14T16:32:39Z", "ms": 661192358568.2822 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-12-15", "window": { "start": { "local": "1990-12-15T23:45:07+08:00", "utc": "1990-12-15T15:45:07Z", "ms": 661275907052.5209 }, "end": { "local": "1990-12-16T00:33:07+08:00", "utc": "1990-12-15T16:33:07Z", "ms": 661278787052.5209 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturdaśī runs from 07:06 on Sat 15 Dec to 09:43 on Sun 16 Dec.", "fact": "1990-12-14T23:06:13Z → 1990-12-16T01:42:56Z" }, { "step": "kaala", "text": "Niśītha is 1 ghaṭikā either side of midnight: 23:45–00:33 on the 14th, 23:45–00:33 on the 15th.", "fact": "nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 14th and 48 of 48 on the 15th.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one night qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 23614 s" }, { "step": "ruling", "text": "Śivarātri, Lu’an, 1990: Saturday 15 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": "1990-12-15", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-15", "confidence": "determinate" } ], "quote": "In Lu’an, Śivarātri 1990 falls on Saturday 15 December. Caturdaśī runs from 07:06 on Sat 15 Dec to 09:43 on Sun 16 Dec and covers all of niśītha that night.", "cite": "https://ahargana.org/lu-an/festivals/1990/shivaratri?on=1990-12-15", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-12-21", "festival": "vinayaka-chaturthi", "name": "Vināyaka Caturthī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-21", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 25194, "anga": { "type": "tithi", "index": 3, "key": "chaturthi", "name": "Caturthī", "start": { "local": "1990-12-20T19:35:10+08:00", "utc": "1990-12-20T11:35:10Z", "ms": 661692910084.565 }, "end": { "local": "1990-12-21T21:24:31+08:00", "utc": "1990-12-21T13:24:31Z", "ms": 661785870749.7606 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-20T19:35:10+08:00", "utc": "1990-12-20T11:35:10Z", "ms": 661692910084.565 }, "end": { "local": "1990-12-21T21:24:31+08:00", "utc": "1990-12-21T13:24:31Z", "ms": 661785870749.7606 } }, "kaala": "madhyahna", "days": [ { "local_date": "1990-12-20", "window": { "start": { "local": "1990-12-20T11:47:16+08:00", "utc": "1990-12-20T03:47:16Z", "ms": 661664836485.2393 }, "end": { "local": "1990-12-20T12:35:16+08:00", "utc": "1990-12-20T04:35:16Z", "ms": 661667716485.2393 } }, "covered_min": 0, "window_min": 48, "qualifies": false }, { "local_date": "1990-12-21", "window": { "start": { "local": "1990-12-21T11:47:47+08:00", "utc": "1990-12-21T03:47:47Z", "ms": 661751266629.849 }, "end": { "local": "1990-12-21T12:35:47+08:00", "utc": "1990-12-21T04:35:47Z", "ms": 661754146629.849 } }, "covered_min": 48, "window_min": 48, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Caturthī runs from 19:35 on Thu 20 Dec to 21:25 on Fri 21 Dec.", "fact": "1990-12-20T11:35:10Z → 1990-12-21T13:24:31Z" }, { "step": "kaala", "text": "Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 20th, 11:48–12:36 on the 21st.", "fact": "madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Caturthī must be present during madhyāhna. It covers 0 of 48 minutes on the 20th and 48 of 48 on the 21st.", "fact": "Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108" }, { "step": "tie_break", "text": "Only one midday qualifies. No tie-break is needed.", "fact": "priority: unstated → only-day · margin 25194 s" }, { "step": "ruling", "text": "Vināyaka Caturthī, Lu’an, 1990: Friday 21 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": "1990-12-21", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-21", "confidence": "determinate" } ], "quote": "In Lu’an, Vināyaka Caturthī 1990 falls on Friday 21 December. Caturthī runs from 19:35 on Thu 20 Dec to 21:25 on Fri 21 Dec and covers all of madhyāhna that midday.", "cite": "https://ahargana.org/lu-an/festivals/1990/vinayaka-chaturthi?on=1990-12-21", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/ekadashi?on=1990-12-28", "festival": "ekadashi", "name": "Putradā Ekādaśī", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-28", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 33709, "anga": { "type": "tithi", "index": 10, "key": "ekadashi", "name": "Ekādaśī", "start": { "local": "1990-12-27T19:17:07+08:00", "utc": "1990-12-27T11:17:07Z", "ms": 662296626680.7007 }, "end": { "local": "1990-12-28T16:34:39+08:00", "utc": "1990-12-28T08:34:39Z", "ms": 662373279013.3854 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-27T19:17:07+08:00", "utc": "1990-12-27T11:17:07Z", "ms": 662296626680.7007 }, "end": { "local": "1990-12-28T16:34:39+08:00", "utc": "1990-12-28T08:34:39Z", "ms": 662373279013.3854 } }, "kaala": "sunrise", "days": [ { "local_date": "1990-12-27", "window": { "start": { "local": "1990-12-27T07:12:28+08:00", "utc": "1990-12-26T23:12:28Z", "ms": 662253147695.0585 }, "end": { "local": "1990-12-27T07:12:28+08:00", "utc": "1990-12-26T23:12:28Z", "ms": 662253147695.0585 } }, "covered_min": 0, "window_min": 0, "qualifies": false }, { "local_date": "1990-12-28", "window": { "start": { "local": "1990-12-28T07:12:50+08:00", "utc": "1990-12-27T23:12:50Z", "ms": 662339569666.8767 }, "end": { "local": "1990-12-28T07:12:50+08:00", "utc": "1990-12-27T23:12:50Z", "ms": 662339569666.8767 } }, "covered_min": 1, "window_min": 0, "qualifies": true } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Ekādaśī runs from 19:17 on Thu 27 Dec to 16:35 on Fri 28 Dec.", "fact": "1990-12-27T11:17:07Z → 1990-12-28T08:34:39Z" }, { "step": "kaala", "text": "Sunrise is at 07:12 on the 27th and 07:13 on the 28th.", "fact": "sunrise: upper limb, 31′ + 16′" }, { "step": "rule", "text": "Ekādaśī must be current at sunrise. It is not on the 27th and is 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 33709 s" }, { "step": "ruling", "text": "Putradā Ekādaśī, Lu’an, 1990: Friday 28 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": "1990-12-28", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-28", "confidence": "determinate" } ], "quote": "In Lu’an, Putradā Ekādaśī 1990 falls on Friday 28 December. Ekādaśī runs from 19:17 on Thu 27 Dec to 16:35 on Fri 28 Dec and is current at sunrise that day.", "cite": "https://ahargana.org/lu-an/festivals/1990/ekadashi?on=1990-12-28", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }, { "id": "/lu-an/festivals/1990/pradosha-vrata?on=1990-12-29", "festival": "pradosha-vrata", "name": "Śukla Pradoṣa Vrata", "tradition": "smarta", "place": "1802206", "year": 1990, "local_date": "1990-12-29", "confidence": "determinate", "boundary_reasons": [], "boundary_margin_s": 14066, "anga": { "type": "tithi", "index": 12, "key": "trayodashi", "name": "Trayodaśī", "start": { "local": "1990-12-29T13:23:57+08:00", "utc": "1990-12-29T05:23:57Z", "ms": 662448236815.6461 }, "end": { "local": "1990-12-30T09:53:53+08:00", "utc": "1990-12-30T01:53:53Z", "ms": 662522032817.1108 }, "month": { "amanta": 9, "purnimanta": 9, "adhika": false, "amanta_name": "Pauṣa", "purnimanta_name": "Pauṣa" } }, "span": { "of": "tithi", "start": { "local": "1990-12-29T13:23:57+08:00", "utc": "1990-12-29T05:23:57Z", "ms": 662448236815.6461 }, "end": { "local": "1990-12-30T09:53:53+08:00", "utc": "1990-12-30T01:53:53Z", "ms": 662522032817.1108 } }, "kaala": "pradosha", "days": [ { "local_date": "1990-12-29", "window": { "start": { "local": "1990-12-29T17:18:23+08:00", "utc": "1990-12-29T09:18:23Z", "ms": 662462303267.5374 }, "end": { "local": "1990-12-29T19:09:44+08:00", "utc": "1990-12-29T11:09:44Z", "ms": 662468984013.5183 } }, "covered_min": 111, "window_min": 111, "qualifies": true }, { "local_date": "1990-12-30", "window": { "start": { "local": "1990-12-30T17:19:03+08:00", "utc": "1990-12-30T09:19:03Z", "ms": 662548743167.4271 }, "end": { "local": "1990-12-30T19:10:21+08:00", "utc": "1990-12-30T11:10:21Z", "ms": 662555420884.6647 } }, "covered_min": 0, "window_min": 111, "qualifies": false } ], "decided_by": "only-day", "explanation": [ { "step": "anga", "text": "Trayodaśī runs from 13:24 on Sat 29 Dec to 09:54 on Sun 30 Dec.", "fact": "1990-12-29T05:23:57Z → 1990-12-30T01:53:53Z" }, { "step": "kaala", "text": "Pradoṣa is 2 muhūrtas after sunset: 17:18–19:10 on the 29th, 17:19–19:10 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 111 of 111 minutes on the 29th and 0 of 111 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 14066 s" }, { "step": "ruling", "text": "Śukla Pradoṣa Vrata, Lu’an, 1990: Saturday 29 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": "1990-12-29", "confidence": "determinate" }, { "kind": "profile", "profile": "compat-drikpanchang@2026.1", "local_date": "1990-12-29", "confidence": "determinate" } ], "quote": "In Lu’an, Śukla Pradoṣa Vrata 1990 falls on Saturday 29 December. Trayodaśī runs from 13:24 on Sat 29 Dec to 09:54 on Sun 30 Dec and covers all of pradoṣa that evening.", "cite": "https://ahargana.org/lu-an/festivals/1990/pradosha-vrata?on=1990-12-29", "method": "pac-rp@2026.1", "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } } ], "engine": { "version": "0.1.0", "ruleset": "2026.3-draft", "kernel": "de440-1900-2100", "kernel_sha256": "7eef444f9e5bd8786b8b5b72e775ecc376991b953a6246ec7a49d2c37434ea74", "tzdata": "2026f" } }