Saturday 22 October

How it was decided

1. 01

   Aṅga

   Trayodaśī runs from 16:15 on Sat 22 Oct to 18:35 on Sun 23 Oct.

   1927-10-22T08:15:12Z → 1927-10-23T10:34:53Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 17:32–19:16 on the 22nd, 17:30–19:15 on the 23rd.

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

3. 03

   Rule

   Trayodaśī must be present during pradoṣa. It covers 104 of 104 minutes on the 22nd and 65 of 105 on the 23rd.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

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 2410 s

5. 05

   Ruling

   Yama Dīpadāna, Baoding, 1927: Saturday 22 October.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Yama Dīpadāna 1927 falls on Saturday 22 October. Trayodaśī runs from 16:15 on Sat 22 Oct to 18:35 on Sun 23 Oct and covers all of pradoṣa that evening. It also reaches the next evening for 65 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.