Ruling · Durgā Navamī · 2002

Wednesday 13 November

Boundaryin Jeddah, under the Rashtriya Panchang method. A threshold is only 0 min 10 s away. Say “contested”.

Decide it for

JeddahDelhiKolkataSingaporeSydneyJersey City

21°29′ N 39°11′ E · Asia/Riyadh · GeoNames 105343

The two middays

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

Midday of Tuesday 12 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:43  12:31 madhyāhna ends
Navamī begins 12:31:27
10:5511:1911:4312:0712:3112:5513:19

0 of 48 minutes covered

Midday of Wednesday 13 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:43  12:31 madhyāhna ends
10:5511:1911:4312:0712:3112:5513:19

48 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 12:31 on Tue 12 Nov to 14:17 on Wed 13 Nov.

    2002-11-12T09:31:27Z → 2002-11-13T11:16:40Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:43–12:31 on the 12th, 11:43–12:31 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 0 of 48 minutes on the 12th and 48 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 10 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Jeddah, 2002: Wednesday 13 November.

    confidence: boundary (margin)

Say it like this

In Jeddah, Durgā Navamī 2002 falls on Wednesday 13 November. Navamī runs from 12:31 on Tue 12 Nov to 14:17 on Wed 13 Nov and covers all of madhyāhna that midday. It is 0 min 10 s from a threshold: treat the date as contested.

ahargana.org/jeddah/festivals/2002/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 13 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 13 Nov
compat-drikpanchangComparison profileTue 12 Nov
No institution has a recorded ruling for Jeddah.

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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles01:31 → 03:1711:1348 min11:130 min12 Nov
Chicago03:31 → 05:1711:1148 min11:110 min12 Nov
Jersey City04:31 → 06:1711:1648 min11:160 min12 Nov
Port of Spain05:31 → 07:1711:2648 min11:260 min12 Nov
London09:31 → 11:1711:2048 min11:200 min12 Nov
Durban11:31 → 13:1711:1633 min11:1648 min12 Nov
Dubai13:31 → 15:1711:390 min11:3948 min13 Nov
Delhi15:01 → 16:4711:410 min11:4148 min13 Nov
Kolkata15:01 → 16:4710:570 min10:5748 min13 Nov
Singapore17:31 → 19:1712:250 min12:2548 min13 Nov
Sydney20:31 → 22:1712:160 min12:1648 min13 Nov
Suva21:31 → 23:1711:260 min11:2748 min13 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