Monday 15 January

How it was decided

1. 01

   Aṅga

   Caturdaśī runs from 05:01 on Mon 15 Jan to 07:42 on Tue 16 Jan.

   2018-01-14T21:01:06Z → 2018-01-15T23:41:31Z

2. 02

   Kāla

   Aruṇodaya is 2 muhūrtas before sunrise: 05:41–07:36 on the 15th, 05:41–07:35 on the 16th.

   arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′

3. 03

   Rule

   Caturdaśī must be present during aruṇodaya. It covers 114 of 114 minutes on the 15th and 114 of 114 on the 16th.

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

4. 04

   Tie-break

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

   priority: unstated → greater-coverage · margin 375 s

5. 05

   Ruling

   Yama Tarpaṇa, Baoding, 2018: Monday 15 January.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Yama Tarpaṇa 2018 falls on Monday 15 January. Caturdaśī runs from 05:01 on Mon 15 Jan to 07:42 on Tue 16 Jan and covers all of aruṇodaya that dawn. It also reaches the next dawn for 114 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.