Ruling · Durgā Navamī · 2007

Monday 19 November

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 5 min 45 s.

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 Sunday 18 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:16  12:04 madhyāhna ends
Navamī begins 12:16:26
10:2810:5211:1611:4012:0412:2812:52

0 of 48 minutes covered

Midday of Monday 19 November

Taken. Navamī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:16  12:04 madhyāhna ends
Navamī ends 11:10:24
10:2810:5211:1611:4012:0412:2812:52

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 12:16 on Sun 18 Nov to 11:10 on Mon 19 Nov.

    2007-11-18T10:16:27Z → 2007-11-19T09:10:24Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:16–12:04 on the 18th, 11:16–12:04 on the 19th.

    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 18th and 0 of 48 on the 19th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: purvaviddha → second-day · margin 345 s

  5. 05

    Ruling

    Durgā Navamī, Cairo, 2007: Monday 19 November.

    confidence: determinate

Say it like this

In Cairo, Durgā Navamī 2007 falls on Monday 19 November. Navamī runs from 12:16 on Sun 18 Nov to 11:10 on Mon 19 Nov, and reaches madhyāhna on neither day.

ahargana.org/cairo/festivals/2007/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 19 Nov
Ahargaṇa, classicalDisc centre, no refractionMon 19 Nov
compat-drikpanchangComparison profileSun 18 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles02:16 → 01:1011:1448 min11:140 min18 Nov
Chicago04:16 → 03:1011:1248 min11:120 min18 Nov
Jersey City05:16 → 04:1011:1748 min11:170 min18 Nov
Port of Spain06:16 → 05:1011:2748 min11:270 min18 Nov
London10:16 → 09:1011:2148 min11:220 min18 Nov
Durban12:16 → 11:1011:170 min11:170 min19 Nov
Dubai14:16 → 13:1011:400 min11:4048 min19 Nov
Delhi15:46 → 14:4011:420 min11:4248 min19 Nov
Kolkata15:46 → 14:4010:570 min10:5848 min19 Nov
Singapore18:16 → 17:1012:260 min12:2648 min19 Nov
Sydney21:16 → 20:1012:160 min12:1748 min19 Nov
Suva22:16 → 21:1011:270 min11:2848 min19 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