Durgā Navamī

1. १Step 1, Aṅga

   Navamī runs from 10:57 on Tue 26 Oct to 09:14 on Wed 27 Oct.

   2066-10-26T07:56:58Z → 2066-10-27T06:13:54Z
2. २Step 2, Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 10:54–11:42 on the 26th, 10:54–11:42 on the 27th.

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

   Navamī must be present during madhyāhna. It covers 45 of 48 minutes on the 26th and 0 of 48 on the 27th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104
4. ४Step 4, Tie-break

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

   one day qualifies → only-day · margin 191 s < 300 s
5. ५Step 5, Ruling

   Durgā Navamī, Doha, 2066: Tuesday 26 October.

   confidence: boundary (margin)

In Doha, Durgā Navamī 2066 falls on Tuesday 26 October. Navamī runs from 10:57 on Tue 26 Oct to 09:14 on Wed 27 Oct and covers 45 of 48 minutes of madhyāhna that midday. It is 3 min 11 s from a threshold. The rule does not settle this date cleanly.

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

Month

Kārtika, amānta

Pakṣa · aṅga

Śukla · Navamī

Kāla

Madhyāhna

Priority

Pūrvaviddhā

Tie-break

First day

Reference

CRC 1955, p. 104

S 9 Aksaya navami (purvahnavyapini), Jagaddhatri puja (Bengal), (udayavyapini one muhurta), Anla navami (Orissa), Durga navami (purvaviddha), Gauri vrata. Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.