Wednesday 5 September

How it was decided

1. 01

   Aṅga

   Caturdaśī runs from 19:50 on Tue 4 Sep to 21:43 on Wed 5 Sep.

   2040-09-04T11:50:01Z → 2040-09-05T13:42:59Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 18:43–20:12 on the 4th, 18:42–20:11 on the 5th.

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

3. 03

   Rule

   Caturdaśī must be present during pradoṣa. It covers 22 of 89 minutes on the 4th and 89 of 89 on the 5th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

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 1342 s

5. 05

   Ruling

   Aghora Caturdaśī, Baoding, 2040: Wednesday 5 September.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Aghora Caturdaśī 2040 falls on Wednesday 5 September. Caturdaśī runs from 19:50 on Tue 4 Sep to 21:43 on Wed 5 Sep and covers all of pradoṣa that evening. It also reaches the previous evening for 22 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.