Monday 17 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 16:44 on Sat 15 Mar to 18:06 on Sun 16 Mar.

   1919-03-15T14:19:25Z → 1919-03-16T15:40:41Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 15:40–18:02 on the 15th, 15:40–18:03 on the 16th.

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

3. 03

   Rule

   Pūrṇimā must be present during sāyāhna. It covers 78 of 143 minutes on the 15th and 143 of 143 on the 16th.

   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 139 s < 300 s

5. 05

   Counted

   Holī is kept the day after Holikā Dahana: Sunday 16 March is the day taken above.

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Aleppo, 1919: Monday 17 March.

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

Say it like this

In Aleppo, Holī 1919 falls on Monday 17 March. It is kept the day after Holikā Dahana, which falls on Sunday 16 March. Pūrṇimā runs from 16:44 on Sat 15 Mar to 18:06 on Sun 16 Mar and covers all of sāyāhna on the 16th. It also reaches the previous late afternoon for 78 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 2 min 19 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.