Śivarātri

1. १Step 1, Aṅga

   Caturdaśī runs from 05:55 on Sun 22 Nov to 06:10 on Mon 23 Nov.

   1908-11-21T21:55:10Z → 1908-11-22T22:09:58Z
2. २Step 2, Kāla

   Niśītha is 1 ghaṭikā either side of midnight: 23:40–00:28 on the 21st, 23:41–00:29 on the 22nd.

   nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
3. ३Step 3, Rule

   Caturdaśī must be present during niśītha. It covers 0 of 48 minutes on the 21st and 48 of 48 on the 22nd.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108
4. ४Step 4, Tie-break

   Only one night qualifies. No tie-break is needed.

   priority: unstated → only-day · margin 19608 s
5. ५Step 5, Ruling

   Śivarātri, Baoding, 1908: Sunday 22 November.

   confidence: determinate

In Baoding, Śivarātri 1908 falls on Sunday 22 November. Caturdaśī runs from 05:55 on Sun 22 Nov to 06:10 on Mon 23 Nov and covers all of niśītha that night.

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

Month

Every lunation

Pakṣa · aṅga

Kṛṣṇa · Caturdaśī

Kāla

Niśītha

Priority

Unstated

Tie-break

Longer coverage, as a boundary

Reference

CRC 1955, p. 108

The krsna caturdasi in each month is called 'Sivaratri'. The chief among them is that of Magha. The tithi must cover nisitha (or pradosa in some opinion). Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 108.

The alternative opinion that reads pradoṣa instead of niśītha is not evaluated.