Monday 11 September

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 16:19 on Mon 11 Sep to 18:43 on Tue 12 Sep.

   1933-09-11T08:19:03Z → 1933-09-12T10:42:51Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 18:43–20:14 on the 11th, 18:42–20:13 on the 12th.

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

3. 03

   Rule

   Aṣṭamī must be present during pradoṣa. It covers 91 of 91 minutes on the 11th and 1 of 91 on the 12th.

   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 67 s < 300 s

5. 05

   Ruling

   Jitāṣṭamī, Datong, 1933: Monday 11 September.

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

Say it like this

In Datong, Jitāṣṭamī (Jitiya) 1933 falls on Monday 11 September. Aṣṭamī runs from 16:19 on Mon 11 Sep to 18:43 on Tue 12 Sep and covers all of pradoṣa that evening. It also reaches the next evening 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 07 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.