Friday 20 September

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 11:00 on Fri 20 Sep to 12:47 on Sat 21 Sep.

   2080-09-20T10:00:10Z → 2080-09-21T11:47:07Z

2. 02

   Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 11:36–12:24 on the 20th, 11:36–12:24 on the 21st.

   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 20th and 48 of 48 on the 21st.

   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 1379 s

5. 05

   Ruling

   Rādhāṣṭamī, Luanda, 2080: Friday 20 September.

   confidence: boundary (tie-break-unstated)

Say it like this

In Luanda, Rādhāṣṭamī 2080 falls on Friday 20 September. Aṣṭamī runs from 11:00 on Fri 20 Sep to 12:47 on Sat 21 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.