Ruling · Durgā Navamī · 1937

Friday 12 November

Determinatein Riyadh, under the Rashtriya Panchang method. Clear of every threshold by 607 minutes.

Decide it for

24°41′ N 46°43′ E · Asia/Riyadh · GeoNames 108410

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Friday 12 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:19  12:07 madhyāhna ends
10:3110:5511:1911:4312:0712:3112:55

48 of 48 minutes covered

Midday of Saturday 13 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:19  12:07 madhyāhna ends
10:3110:5511:1911:4312:0712:3112:55

0 of 48 minutes covered

Navamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Navamī runs from 01:03 on Fri 12 Nov to 01:12 on Sat 13 Nov.

    1937-11-11T21:56:32Z → 1937-11-12T22:06:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:19–12:07 on the 12th, 11:19–12:07 on the 13th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 48 of 48 minutes on the 12th and 0 of 48 on the 13th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

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

    priority: purvaviddha → only-day · margin 36424 s

  5. 05

    Ruling

    Durgā Navamī, Riyadh, 1937: Friday 12 November.

    confidence: determinate

Say it like this

In Riyadh, Durgā Navamī 1937 falls on Friday 12 November. Navamī runs from 01:03 on Fri 12 Nov to 01:12 on Sat 13 Nov and covers all of madhyāhna that midday.

ahargana.org/riyadh/festivals/1937/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 12 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 12 Nov
compat-drikpanchangComparison profileFri 12 Nov
No institution has a recorded ruling for Riyadh.

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

The rule, as data

/rules/durga-navami · ruleset 2026.3-draft

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.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles13:57 → 14:0611:130 min11:1348 min12 Nov
Chicago15:57 → 16:0611:100 min11:1148 min12 Nov
Jersey City16:57 → 17:0611:160 min11:1648 min12 Nov
Port of Spain17:57 → 18:0611:260 min11:2648 min12 Nov
London21:57 → 22:0611:200 min11:2048 min12 Nov
Durban23:57 → 00:0611:160 min11:1648 min12 Nov
Dubai01:57 → 02:0611:390 min11:3948 min12 Nov
Delhi03:27 → 03:3611:410 min11:4148 min12 Nov
Kolkata03:27 → 03:3610:560 min10:5748 min12 Nov
Singapore05:17 → 05:2611:450 min11:4548 min12 Nov
Sydney07:57 → 08:0611:150 min11:1648 min12 Nov
Suva09:57 → 10:0611:260 min11:2748 min12 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
durga-navami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa