Durgā Navamī

1. १Step 1, Aṅga

   Navamī runs from 11:53 on Sat 8 Nov to 09:54 on Sun 9 Nov.

   1997-11-08T08:52:50Z → 1997-11-09T06:54:00Z
2. २Step 2, Kāla

   Madhyāhna is 1 ghaṭikā either side of midday: 10:53–11:41 on the 8th, 10:54–11:42 on the 9th.

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

   Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 8th and 0 of 48 on the 9th.

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

   Neither midday qualifies. The source says what then (p. 101): the second day.

   no day qualifies → second-day, stated: Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 101 · margin 681 s
5. ५Step 5, Ruling

   Durgā Navamī, Doha, 1997: Sunday 9 November.

   confidence: determinate

In Doha, Durgā Navamī 1997 falls on Sunday 9 November. Navamī runs from 11:53 on Sat 8 Nov to 09:54 on Sun 9 Nov, and reaches madhyāhna on neither day. For that case the source takes the second day (Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 101).

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.

Here noon or madhyahna relates to the period of time from 24 minutes (one ghatika) before mid-day upto the same time after it. This is the most appropriate time. If this time is not covered by the tithi on any day, the festival is to be observed on the succeeding day of the tithi. Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 101.