Sunday 12 September

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 11:10 on Sun 12 Sep to 13:41 on Mon 13 Sep.

   1937-09-12T07:39:43Z → 1937-09-13T10:11:21Z

2. 02

   Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 12th, 11:36–12:24 on the 13th.

   madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 12th and 48 of 48 on the 13th.

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

4. 04

   Tie-break

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

   priority: unstated → greater-coverage · margin 1603 s

5. 05

   Ruling

   Rādhāṣṭamī, Tehran, 1937: Sunday 12 September.

   confidence: boundary (tie-break-unstated)

Say it like this

In Tehran, Rādhāṣṭamī 1937 falls on Sunday 12 September. Aṣṭamī runs from 11:10 on Sun 12 Sep to 13:41 on Mon 13 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.

Copy with citation

Who says what

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