Ruling · Durgā Navamī · 1948

Tuesday 9 November

Boundaryin Mosul, under the Rashtriya Panchang method. A threshold is only 2 min 00 s away. Say “contested”.

Decide it for

MosulDelhiKolkataSingaporeSydneyJersey City

36°20′ N 43°07′ E · Asia/Baghdad · GeoNames 99072

The two middays

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

Midday of Tuesday 9 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:27  12:15 madhyāhna ends
10:3911:0311:2711:5112:1512:3913:03

48 of 48 minutes covered

Midday of Wednesday 10 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:27  12:15 madhyāhna ends
Navamī ends 11:25:17
10:3911:0311:2711:5112:1512:3913:03

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 08:56 on Tue 9 Nov to 11:25 on Wed 10 Nov.

    1948-11-09T05:55:35Z → 1948-11-10T08:25:17Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:27–12:15 on the 9th, 11:27–12:15 on the 10th.

    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 9th and 0 of 48 on the 10th.

    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 120 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Mosul, 1948: Tuesday 9 November.

    confidence: boundary (margin)

Say it like this

In Mosul, Durgā Navamī 1948 falls on Tuesday 9 November. Navamī runs from 08:56 on Tue 9 Nov to 11:25 on Wed 10 Nov and covers all of madhyāhna that midday. It is 2 min 00 s from a threshold: treat the date as contested.

ahargana.org/mosul/festivals/1948/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 9 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 9 Nov
compat-drikpanchangComparison profileTue 9 Nov
No institution has a recorded ruling for Mosul.

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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles22:56 → 01:2512:1348 min12:130 min9 Nov
Chicago23:56 → 02:2511:1048 min11:100 min9 Nov
Jersey City00:56 → 03:2511:1648 min11:160 min9 Nov
Port of Spain01:56 → 04:2511:2648 min11:260 min9 Nov
London05:56 → 08:2511:2048 min11:200 min9 Nov
Durban07:56 → 10:2511:1648 min11:160 min9 Nov
Dubai09:56 → 12:2511:3948 min11:3947 min9 Nov
Delhi11:26 → 13:5511:4148 min11:4148 min9 Nov
Kolkata11:26 → 13:5510:5619 min10:5648 min9 Nov
Singapore13:26 → 15:5511:540 min11:5548 min10 Nov
Sydney15:56 → 18:2511:150 min11:1548 min10 Nov
Suva17:56 → 20:2511:260 min11:2648 min10 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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