Friday 28 October

How it was decided

1. 01

   Aṅga

   Trayodaśī runs from 18:46 on Thu 27 Oct to 20:51 on Fri 28 Oct.

   2016-10-27T10:45:32Z → 2016-10-28T12:50:58Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 17:23–19:10 on the 27th, 17:22–19:09 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 24 of 106 minutes on the 27th and 107 of 107 on the 28th.

   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 1451 s

5. 05

   Ruling

   Yama Dīpadāna, Baoding, 2016: Friday 28 October.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Yama Dīpadāna 2016 falls on Friday 28 October. Trayodaśī runs from 18:46 on Thu 27 Oct to 20:51 on Fri 28 Oct and covers all of pradoṣa that evening. It also reaches the previous evening for 24 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.