Thursday 30 August

How it was decided

1. 01

   Aṅga

   Caturdaśī runs from 18:26 on Thu 30 Aug to 19:52 on Fri 31 Aug.

   1951-08-30T10:25:33Z → 1951-08-31T11:51:41Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 18:53–20:20 on the 30th, 18:52–20:19 on the 31st.

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

3. 03

   Rule

   Caturdaśī must be present during pradoṣa. It covers 87 of 87 minutes on the 30th and 60 of 87 on the 31st.

   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 1632 s

5. 05

   Ruling

   Aghora Caturdaśī, Baoding, 1951: Thursday 30 August.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Aghora Caturdaśī 1951 falls on Thursday 30 August. Caturdaśī runs from 18:26 on Thu 30 Aug to 19:52 on Fri 31 Aug and covers all of pradoṣa that evening. It also reaches the next evening for 60 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.