Rādhāṣṭamī

1. १Step 1, Aṅga

   Aṣṭamī runs from 15:11 on Mon 13 Sep to 13:10 on Tue 14 Sep.

   2021-09-13T09:41:14Z → 2021-09-14T07:39:45Z
2. २Step 2, Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 13th, 11:42–12:30 on the 14th.

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

   Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 13th and 48 of 48 on the 14th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103
4. ४Step 4, Tie-break

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

   one day qualifies → only-day · margin 2378 s
5. ५Step 5, Ruling

   Rādhāṣṭamī, Colombo, 2021: Tuesday 14 September.

   confidence: determinate

In Colombo, Rādhāṣṭamī 2021 falls on Tuesday 14 September. Aṣṭamī runs from 15:11 on Mon 13 Sep to 13:10 on Tue 14 Sep and covers all of madhyāhna that midday.

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

Month

Bhādrapada, amānta

Pakṣa · aṅga

Śukla · Aṣṭamī

Kāla

Madhyāhna

Priority

Unstated

Tie-break

Longer coverage, as a boundary

Reference

CRC 1955, p. 103

S 8 Durvastami (purvaviddha — S 8 of saura Bhadra except Bengal), Mahalaksmi vratarambha, Radhastami (madhyahna vyapini) Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.