Tuesday 30 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 16:26 on Sun 28 Mar to 18:00 on Mon 29 Mar.

   1926-03-28T08:25:43Z → 1926-03-29T10:00:05Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 15:31–18:02 on the 28th, 15:32–18:03 on the 29th.

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

3. 03

   Rule

   Pūrṇimā must be present during sāyāhna. It covers 96 of 150 minutes on the 28th and 148 of 151 on the 29th.

   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 175 s < 300 s

5. 05

   Counted

   Holī is kept the day after Holikā Dahana: Monday 29 March is the day taken above.

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Daqing, 1926: Tuesday 30 March.

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

Say it like this

In Daqing, Holī 1926 falls on Tuesday 30 March. It is kept the day after Holikā Dahana, which falls on Monday 29 March. Pūrṇimā runs from 16:26 on Sun 28 Mar to 18:00 on Mon 29 Mar and covers 148 of 151 minutes of sāyāhna on the 29th. It also reaches the previous late afternoon for 96 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 55 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.