Tuesday 1 February

How it was decided

1. 01

   Aṅga

   Caturthī runs from 17:05 on Tue 1 Feb to 19:46 on Wed 2 Feb.

   1949-02-01T09:04:36Z → 1949-02-02T11:46:18Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 17:39–19:29 on the 1st, 17:40–19:30 on the 2nd.

   pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Caturthī must be present during pradoṣa. It covers 110 of 110 minutes on the 1st and 110 of 110 on the 2nd.

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

4. 04

   Tie-break

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

   priority: unstated → greater-coverage · margin 1002 s

5. 05

   Ruling

   Tila Caturthī, Baoding, 1949: Tuesday 1 February.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Tila Caturthī 1949 falls on Tuesday 1 February. Caturthī runs from 17:05 on Tue 1 Feb to 19:46 on Wed 2 Feb and covers all of pradoṣa that evening. It also reaches the next evening for 110 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.