Thursday 12 February

How it was decided

1. 01

   Aṅga

   Saptamī runs from 03:08 on Thu 12 Feb to 05:39 on Fri 13 Feb.

   2065-02-11T19:08:25Z → 2065-02-12T21:39:19Z

2. 02

   Kāla

   Aruṇodaya is 2 muhūrtas before sunrise: 05:26–07:13 on the 12th, 05:25–07:12 on the 13th.

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

3. 03

   Rule

   Saptamī must be present during aruṇodaya. It covers 107 of 107 minutes on the 12th and 14 of 107 on the 13th.

   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 840 s

5. 05

   Ruling

   Ratha Saptamī, Baoding, 2065: Thursday 12 February.

   confidence: boundary (tie-break-unstated)

Say it like this

In Baoding, Ratha Saptamī 2065 falls on Thursday 12 February. Saptamī runs from 03:08 on Thu 12 Feb to 05:39 on Fri 13 Feb and covers all of aruṇodaya that dawn. It also reaches the next dawn for 14 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.