Saturday 23 February

How it was decided

1. 01

   Aṅga

   Caturdaśī runs from 00:11 on Sat 23 Feb to 01:07 on Sun 24 Feb.

   2047-02-22T16:11:25Z → 2047-02-23T17:07:17Z

2. 02

   Kāla

   Niśītha is 1 ghaṭikā either side of midnight: 23:29–00:17 on the 22nd, 23:29–00:17 on the 23rd.

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

3. 03

   Rule

   Caturdaśī must be present during niśītha. It covers 6 of 48 minutes on the 22nd and 48 of 48 on the 23rd.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 105

4. 04

   Tie-break

   Both nights qualify and the cited authorities disagree. The one covered longer is ruled, as a boundary.

   priority: disputed → greater-coverage · margin 334 s

5. 05

   Ruling

   Mahāśivarātri, Daqing, 2047: Saturday 23 February.

   confidence: boundary (tie-break-disputed)

Say it like this

In Daqing, Mahāśivarātri 2047 falls on Saturday 23 February. Caturdaśī runs from 00:11 on Sat 23 Feb to 01:07 on Sun 24 Feb and covers all of niśītha that night. It also reaches the previous night for 6 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.