Sunday 13 September

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 09:07 on Sun 13 Sep to 11:42 on Mon 14 Sep.

   1964-09-13T08:06:57Z → 1964-09-14T10:41:40Z

2. 02

   Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 11:39–12:27 on the 13th, 11:39–12:27 on the 14th.

   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 13th and 3 of 48 on the 14th.

   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 182 s < 300 s

5. 05

   Ruling

   Rādhāṣṭamī, Luanda, 1964: Sunday 13 September.

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

Say it like this

In Luanda, Rādhāṣṭamī 1964 falls on Sunday 13 September. Aṣṭamī runs from 09:07 on Sun 13 Sep to 11:42 on Mon 14 Sep and covers all of madhyāhna that midday. It also reaches the next midday for 3 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 3 min 02 s from a threshold: 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.