Monday 12 September

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 17:17 on Mon 12 Sep to 19:26 on Tue 13 Sep.

   1960-09-12T09:17:29Z → 1960-09-13T11:26:18Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 17:58–19:28 on the 12th, 17:56–19:27 on the 13th.

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

3. 03

   Rule

   Aṣṭamī must be present during pradoṣa. It covers 90 of 90 minutes on the 12th and 90 of 91 on the 13th.

   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 35 s < 300 s

5. 05

   Ruling

   Jitāṣṭamī, Daqing, 1960: Monday 12 September.

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

Say it like this

In Daqing, Jitāṣṭamī (Jitiya) 1960 falls on Monday 12 September. Aṣṭamī runs from 17:17 on Mon 12 Sep to 19:26 on Tue 13 Sep and covers all of pradoṣa that evening. It also reaches the next evening for 90 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 35 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.