Monday 12 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 16:41 on Sat 10 Mar to 18:27 on Sun 11 Mar.

   2085-03-10T10:41:22Z → 2085-03-11T12:27:03Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 15:37–18:00 on the 10th, 15:37–18:01 on the 11th.

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

3. 03

   Rule

   Pūrṇimā must be present during sāyāhna. It covers 79 of 143 minutes on the 10th and 143 of 143 on the 11th.

   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 1589 s

5. 05

   Counted

   Holī is kept the day after Holikā Dahana: Sunday 11 March is the day taken above.

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Chattogram, 2085: Monday 12 March.

   confidence: boundary (tie-break-unstated)

Say it like this

In Chattogram, Holī 2085 falls on Monday 12 March. It is kept the day after Holikā Dahana, which falls on Sunday 11 March. Pūrṇimā runs from 16:41 on Sat 10 Mar to 18:27 on Sun 11 Mar and covers all of sāyāhna on the 11th. It also reaches the previous late afternoon for 79 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.