Friday 12 March

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 16:55 on Wed 10 Mar to 19:34 on Thu 11 Mar.

   1971-03-10T23:55:29Z → 1971-03-12T02:33:34Z

2. 02

   Kāla

   Sāyāhna is last 3 of 15 day muhūrtas: 16:11–18:32 on the 10th, 16:11–18:33 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 96 of 141 minutes on the 10th and 142 of 142 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 2691 s

5. 05

   Counted

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

   follows: holika-dahana + 1 d

6. 06

   Ruling

   Holī, Phoenix, 1971: Friday 12 March.

   confidence: boundary (tie-break-unstated)

Say it like this

In Phoenix, Holī 1971 falls on Friday 12 March. It is kept the day after Holikā Dahana, which falls on Thursday 11 March. Pūrṇimā runs from 16:55 on Wed 10 Mar to 19:34 on Thu 11 Mar and covers all of sāyāhna on the 11th. 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.

Copy with citation

Who says what

Institutional rulings are recorded with a source address, and are never edited to agree.