Sunday 30 October

How it was decided

1. 01

   Aṅga

   Amāvasyā runs from 23:10 on Sat 29 Oct to 01:38 on Mon 31 Oct.

   2016-10-29T15:10:19Z → 2016-10-30T17:38:10Z

2. 02

   Kāla

   Niśītha is 1 ghaṭikā either side of midnight: 23:00–23:48 on the 29th, 23:00–23:48 on the 30th.

   nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Amāvasyā must be present during niśītha. It covers 38 of 48 minutes on the 29th and 48 of 48 on the 30th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

4. 04

   Tie-break

   Both nights qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

   priority: unstated → greater-coverage · margin 612 s

5. 05

   Ruling

   Kālī Pūjā, Daqing, 2016: Sunday 30 October.

   confidence: boundary (tie-break-unstated)

Say it like this

In Daqing, Kālī Pūjā 2016 falls on Sunday 30 October. Amāvasyā runs from 23:10 on Sat 29 Oct to 01:38 on Mon 31 Oct and covers all of niśītha that night. It also reaches the previous night for 38 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.