Monday 20 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 17:47 on Sat 18 Mar to 17:26 on Sun 19 Mar.

   1916-03-18T17:47:12Z → 1916-03-19T17:26:18Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 15:33–17:57 on the 18th, 15:33–17:58 on the 19th.

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

3. 03

   Rule

   Pūrṇimā must be present during sāyāhna. It covers 10 of 144 minutes on the 18th and 113 of 145 on the 19th.

   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 594 s

5. 05

   Counted

   Holī is kept the day after Holikā Dahana: Sunday 19 March is the day taken above.

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Algiers, 1916: Monday 20 March.

   confidence: boundary (tie-break-unstated)

Say it like this

In Algiers, Holī 1916 falls on Monday 20 March. It is kept the day after Holikā Dahana, which falls on Sunday 19 March. Pūrṇimā runs from 17:47 on Sat 18 Mar to 17:26 on Sun 19 Mar and covers 113 of 145 minutes of sāyāhna on the 19th. It also reaches the previous late afternoon for 10 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.