Friday 13 February

How it was decided

1. 01

   Aṅga

   Caturthī runs from 17:52 on Fri 13 Feb to 19:39 on Sat 14 Feb.

   1948-02-13T09:51:34Z → 1948-02-14T11:38:39Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 17:52–19:38 on the 13th, 17:53–19:39 on the 14th.

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

3. 03

   Rule

   Caturthī must be present during pradoṣa. It covers 107 of 107 minutes on the 13th and 106 of 107 on the 14th.

   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 1 s < 300 s

5. 05

   Ruling

   Tila Caturthī, Baoding, 1948: Friday 13 February.

   confidence: boundary (margin, tie-break-unstated)

Say it like this

In Baoding, Tila Caturthī 1948 falls on Friday 13 February. Caturthī runs from 17:52 on Fri 13 Feb to 19:39 on Sat 14 Feb and covers all of pradoṣa that evening. It also reaches the next evening for 106 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested. It is 0 min 01 s from a threshold: 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.