Tuesday 10 July

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 20:25 on Mon 9 Jul to 21:49 on Tue 10 Jul.

   2063-07-09T12:25:14Z → 2063-07-10T13:48:31Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 19:45–21:00 on the 9th, 19:45–20:59 on the 10th.

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

3. 03

   Rule

   Pūrṇimā must be present during pradoṣa. It covers 34 of 74 minutes on the 9th and 74 of 74 on the 10th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

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 2068 s

5. 05

   Ruling

   Śiva Śayanotsava, Baoding, 2063: Tuesday 10 July.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Śiva Śayanotsava 2063 falls on Tuesday 10 July. Pūrṇimā runs from 20:25 on Mon 9 Jul to 21:49 on Tue 10 Jul and covers all of pradoṣa that evening. It also reaches the previous evening for 34 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.