Monday 16 December

How it was decided

1. 01

   Aṅga

   Pūrṇimā runs from 15:21 on Mon 16 Dec to 17:28 on Tue 17 Dec.

   2013-12-16T07:20:49Z → 2013-12-17T09:28:04Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 16:57–18:54 on the 16th, 16:57–18:54 on the 17th.

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

3. 03

   Rule

   Pūrṇimā must be present during pradoṣa. It covers 117 of 117 minutes on the 16th and 31 of 117 on the 17th.

   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 1840 s

5. 05

   Ruling

   Dattātreyotpatti, Baoding, 2013: Monday 16 December.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2013 falls on Monday 16 December. Pūrṇimā runs from 15:21 on Mon 16 Dec to 17:28 on Tue 17 Dec and covers all of pradoṣa that evening. It also reaches the next evening for 31 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

Copy with citation

Who says what

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