Friday 3 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 17:30 on Wed 1 Mar to 19:35 on Thu 2 Mar.

   1961-03-01T11:30:17Z → 1961-03-02T13:34:39Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 15:36–17:56 on the 1st, 15:36–17:56 on the 2nd.

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

3. 03

   Rule

   Pūrṇimā must be present during sāyāhna. It covers 26 of 140 minutes on the 1st and 141 of 141 on the 2nd.

   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 1545 s

5. 05

   Counted

   Holī is kept the day after Holikā Dahana: Thursday 2 March is the day taken above.

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Chattogram, 1961: Friday 3 March.

   confidence: boundary (tie-break-unstated)

Say it like this

In Chattogram, Holī 1961 falls on Friday 3 March. It is kept the day after Holikā Dahana, which falls on Thursday 2 March. Pūrṇimā runs from 17:30 on Wed 1 Mar to 19:35 on Thu 2 Mar and covers all of sāyāhna on the 2nd. It also reaches the previous late afternoon for 26 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.