Ruling · Durgā Navamī · 1954

Thursday 4 November

Boundaryin Riyadh, under the Rashtriya Panchang method. A threshold is only 2 min 29 s away. Say “contested”.

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 Thursday 4 November

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:13  12:01 madhyāhna ends
Navamī begins 11:54:21
10:2510:4911:1311:3712:0112:2512:49

6 of 48 minutes covered, the last 6

Midday of Friday 5 November

Qualifies with 2 of 48 minutes. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
Navamī ends 11:15:05
10:2510:4911:1311:3712:0112:2512:49

2 of 48 minutes covered, the first 2

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 11:54 on Thu 4 Nov to 11:15 on Fri 5 Nov.

    1954-11-04T08:54:22Z → 1954-11-05T08:15:05Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 4th, 11:13–12:01 on the 5th.

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

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 6 of 48 minutes on the 4th and 2 of 48 on the 5th.

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

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 149 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Riyadh, 1954: Thursday 4 November.

    confidence: boundary (margin)

Say it like this

In Riyadh, Durgā Navamī 1954 falls on Thursday 4 November. Navamī runs from 11:54 on Thu 4 Nov to 11:15 on Fri 5 Nov and covers 6 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 2 minutes; by the rule the first midday is taken. It is 2 min 29 s from a threshold: treat the date as contested.

ahargana.org/riyadh/festivals/1954/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 4 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 4 Nov
compat-drikpanchangComparison profileThu 4 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 4thCoveredMadhyāhna 5thCoveredRuled
Los Angeles00:54 → 00:1511:1248 min11:120 min4 Nov
Chicago02:54 → 02:1511:1048 min11:100 min4 Nov
Jersey City03:54 → 03:1511:1648 min11:160 min4 Nov
Port of Spain04:54 → 04:1511:2648 min11:260 min4 Nov
London08:54 → 08:1511:2048 min11:200 min4 Nov
Durban10:54 → 10:1511:1648 min11:160 min4 Nov
Dubai12:54 → 12:1511:380 min11:3837 min5 Nov
Delhi14:24 → 13:4511:410 min11:4148 min5 Nov
Kolkata14:24 → 13:4510:560 min10:5648 min5 Nov
Singapore16:24 → 15:4511:540 min11:5448 min5 Nov
Sydney18:54 → 18:1511:150 min11:1548 min5 Nov
Suva20:54 → 20:1511:260 min11:2648 min5 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

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