Sunday 23 January

How it was decided

1. 01

   Aṅga

   Caturdaśī runs from 07:11 on Sat 22 Jan to 08:25 on Sun 23 Jan.

   1955-01-21T23:10:39Z → 1955-01-23T00:25:28Z

2. 02

   Kāla

   Aruṇodaya is 2 muhūrtas before sunrise: 05:40–07:33 on the 22nd, 05:40–07:32 on the 23rd.

   arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Caturdaśī must be present during aruṇodaya. It covers 22 of 113 minutes on the 22nd and 113 of 113 on the 23rd.

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

4. 04

   Tie-break

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

   priority: unstated → greater-coverage · margin 1338 s

5. 05

   Ruling

   Yama Tarpaṇa, Baoding, 1955: Sunday 23 January.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Yama Tarpaṇa 1955 falls on Sunday 23 January. Caturdaśī runs from 07:11 on Sat 22 Jan to 08:25 on Sun 23 Jan and covers all of aruṇodaya that dawn. It also reaches the previous dawn for 22 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.