Monday 27 October

How it was decided

1. 01

   Aṅga

   Trayodaśī runs from 08:25 on Mon 27 Oct to 05:09 on Tue 28 Oct.

   1913-10-27T00:25:01Z → 1913-10-27T21:08:43Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 17:25–19:11 on the 27th, 17:23–19:10 on the 28th.

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

3. 03

   Rule

   Trayodaśī must be present during pradoṣa. It covers 106 of 106 minutes on the 27th and 0 of 106 on the 28th.

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

4. 04

   Tie-break

   Only one evening qualifies. No tie-break is needed.

   priority: unstated → only-day · margin 32378 s

5. 05

   Ruling

   Yama Dīpadāna, Baoding, 1913: Monday 27 October.

   confidence: determinate

Say it like this

In Baoding, Yama Dīpadāna 1913 falls on Monday 27 October. Trayodaśī runs from 08:25 on Mon 27 Oct to 05:09 on Tue 28 Oct and covers all of pradoṣa that evening.

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Who says what

Institutional rulings are recorded with a source address, and are never edited to agree.