Sunday 13 February

How it was decided

1. 01

   Aṅga

   Pañcamī runs from 12:34 on Sat 12 Feb to 13:13 on Sun 13 Feb.

   1921-02-12T07:04:09Z → 1921-02-13T07:43:09Z

2. 02

   Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 12:17–13:05 on the 12th, 12:17–13:05 on the 13th.

   madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Pañcamī must be present during madhyāhna. It covers 31 of 48 minutes on the 12th and 48 of 48 on the 13th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

4. 04

   Tie-break

   Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

   priority: unstated → greater-coverage · margin 478 s

5. 05

   Ruling

   Vasanta Pañcamī, Indore, 1921: Sunday 13 February.

   confidence: boundary (tie-break-unstated)

Say it like this

In Indore, Vasanta Pañcamī 1921 falls on Sunday 13 February. Pañcamī runs from 12:34 on Sat 12 Feb to 13:13 on Sun 13 Feb and covers all of madhyāhna that midday. It also reaches the previous midday for 31 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.