Tuesday 29 August

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 12:07 on Mon 28 Aug to 14:23 on Tue 29 Aug.

   2017-08-28T19:06:45Z → 2017-08-29T21:22:56Z

2. 02

   Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 12:05–12:53 on the 28th, 12:05–12:53 on the 29th.

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

3. 03

   Rule

   Aṣṭamī must be present during madhyāhna. It covers 46 of 48 minutes on the 28th and 48 of 48 on the 29th.

   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 99 s < 300 s

5. 05

   Ruling

   Rādhāṣṭamī, Phoenix, 2017: Tuesday 29 August.

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

Say it like this

In Phoenix, Rādhāṣṭamī 2017 falls on Tuesday 29 August. Aṣṭamī runs from 12:07 on Mon 28 Aug to 14:23 on Tue 29 Aug and covers all of madhyāhna that midday. It also reaches the previous midday for 46 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 39 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.