Thursday 21 September

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 17:37 on Thu 21 Sep to 18:40 on Fri 22 Sep.

   1905-09-21T09:36:57Z → 1905-09-22T10:39:45Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 17:42–19:15 on the 21st, 17:40–19:14 on the 22nd.

   pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Aṣṭamī must be present during pradoṣa. It covers 94 of 94 minutes on the 21st and 60 of 94 on the 22nd.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

4. 04

   Tie-break

   Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

   priority: unstated → greater-coverage · margin 281 s < 300 s

5. 05

   Ruling

   Jitāṣṭamī, Daqing, 1905: Thursday 21 September.

   confidence: boundary (margin, tie-break-unstated)

Say it like this

In Daqing, Jitāṣṭamī (Jitiya) 1905 falls on Thursday 21 September. Aṣṭamī runs from 17:37 on Thu 21 Sep to 18:40 on Fri 22 Sep and covers all of pradoṣa that evening. It also reaches the next evening for 60 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 4 min 41 s from a threshold: treat the date as contested.

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Who says what

Institutional rulings are recorded with a source address, and are never edited to agree.