Sunday 17 September

How it was decided

1. 01

   Aṅga

   Aṣṭamī runs from 19:51 on Sat 16 Sep to 19:37 on Sun 17 Sep.

   2090-09-16T11:50:32Z → 2090-09-17T11:37:26Z

2. 02

   Kāla

   Pradoṣa is 2 muhūrtas after sunset: 18:34–20:07 on the 16th, 18:32–20:05 on the 17th.

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

3. 03

   Rule

   Aṣṭamī must be present during pradoṣa. It covers 16 of 93 minutes on the 16th and 65 of 93 on the 17th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

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 972 s

5. 05

   Ruling

   Jitāṣṭamī, Datong, 2090: Sunday 17 September.

   confidence: boundary (tie-break-unstated)

Say it like this

In Datong, Jitāṣṭamī (Jitiya) 2090 falls on Sunday 17 September. Aṣṭamī runs from 19:51 on Sat 16 Sep to 19:37 on Sun 17 Sep and covers 65 of 93 minutes of pradoṣa that evening. It also reaches the previous evening for 16 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.