Monday 26 October

How it was decided

1. 01

   Aṅga

   Navamī runs from 11:13 on Mon 26 Oct to 11:46 on Tue 27 Oct.

   1914-10-26T10:43:16Z → 1914-10-27T11:16:27Z

2. 02

   Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 10:57–11:45 on the 26th, 10:57–11:45 on the 27th.

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

3. 03

   Rule

   Navamī must be present during madhyāhna. It covers 32 of 48 minutes on the 26th and 48 of 48 on the 27th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

4. 04

   Tie-break

   Both middays qualify. Pūrvaviddhā: the first is taken.

   priority: purvaviddha → purvaviddha · margin 78 s < 300 s

5. 05

   Ruling

   Durgā Navamī, Luanda, 1914: Monday 26 October.

   confidence: boundary (margin)

Say it like this

In Luanda, Durgā Navamī 1914 falls on Monday 26 October. Navamī runs from 11:13 on Mon 26 Oct to 11:46 on Tue 27 Oct and covers 32 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken. It is 1 min 18 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.