Tuesday 10 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 15:49 on Mon 9 Mar to 16:21 on Tue 10 Mar.

   1925-03-09T13:49:27Z → 1925-03-10T14:20:43Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 15:38–17:59 on the 9th, 15:38–18:00 on the 10th.

   sayahna: day-muhurta-13-15 · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Pūrṇimā must be present during sāyāhna. It covers 129 of 141 minutes on the 9th and 43 of 142 on the 10th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

4. 04

   Tie-break

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

   priority: unstated → greater-coverage · margin 703 s

5. 05

   Counted

   Holī is kept the day after Holikā Dahana: Monday 9 March is the day taken above.

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Cairo, 1925: Tuesday 10 March.

   confidence: boundary (tie-break-unstated)

Say it like this

In Cairo, Holī 1925 falls on Tuesday 10 March. It is kept the day after Holikā Dahana, which falls on Monday 9 March. Pūrṇimā runs from 15:49 on Mon 9 Mar to 16:21 on Tue 10 Mar and covers 129 of 141 minutes of sāyāhna on the 9th. It also reaches the next late afternoon for 43 minutes; the rule does not say which to take, and the one covered longer is ruled: 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.