Sunday 27 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 19:23 on Fri 25 Mar to 17:21 on Sat 26 Mar.

   2089-03-25T11:23:22Z → 2089-03-26T09:21:28Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 17:01–19:29 on the 25th, 17:02–19:30 on the 26th.

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

3. 03

   Rule

   Pūrṇimā must be present during sāyāhna. It covers 6 of 148 minutes on the 25th and 20 of 149 on the 26th.

   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 364 s

5. 05

   Counted

   Holī is kept the day after Holikā Dahana: Saturday 26 March is the day taken above.

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Xining, 2089: Sunday 27 March.

   confidence: boundary (tie-break-unstated)

Say it like this

In Xining, Holī 2089 falls on Sunday 27 March. It is kept the day after Holikā Dahana, which falls on Saturday 26 March. Pūrṇimā runs from 19:23 on Fri 25 Mar to 17:21 on Sat 26 Mar and covers 20 of 149 minutes of sāyāhna on the 26th. It also reaches the previous late afternoon for 6 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.