Ruling · Durgā Navamī · 2005

Thursday 10 November

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 45 minutes.

Decide it for

CairoDelhiKolkataSingaporeSydneyJersey City

30°04′ N 31°15′ E · Africa/Cairo · GeoNames 360630

The two middays

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

Midday of Wednesday 9 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:15  12:03 madhyāhna ends
10:2710:5111:1511:3912:0312:2712:51

0 of 48 minutes covered

Midday of Thursday 10 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:15  12:03 madhyāhna ends
Navamī ends 12:47:25
10:2710:5111:1511:3912:0312:2712:51

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 14:54 on Wed 9 Nov to 12:47 on Thu 10 Nov.

    2005-11-09T12:53:38Z → 2005-11-10T10:47:25Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:15–12:03 on the 9th, 11:15–12:03 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 0 of 48 minutes on the 9th and 48 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 2678 s

  5. 05

    Ruling

    Durgā Navamī, Cairo, 2005: Thursday 10 November.

    confidence: determinate

Say it like this

In Cairo, Durgā Navamī 2005 falls on Thursday 10 November. Navamī runs from 14:54 on Wed 9 Nov to 12:47 on Thu 10 Nov and covers all of madhyāhna that midday.

ahargana.org/cairo/festivals/2005/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 10 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 10 Nov
compat-drikpanchangComparison profileThu 10 Nov
No institution has a recorded ruling for Cairo.

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 Angeles04:54 → 02:4711:1348 min11:130 min9 Nov
Chicago06:54 → 04:4711:1048 min11:100 min9 Nov
Jersey City07:54 → 05:4711:1648 min11:160 min9 Nov
Port of Spain08:54 → 06:4711:2648 min11:260 min9 Nov
London12:54 → 10:4711:200 min11:200 min10 Nov
Durban14:54 → 12:4711:160 min11:1648 min10 Nov
Dubai16:54 → 14:4711:380 min11:3948 min10 Nov
Delhi18:24 → 16:1711:410 min11:4148 min10 Nov
Kolkata18:24 → 16:1710:560 min10:5648 min10 Nov
Singapore20:54 → 18:4712:240 min12:2548 min10 Nov
Sydney23:54 → 21:4712:150 min12:1548 min10 Nov
Suva00:54 → 22:4711:260 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

About Ahargaṇa