Ruling · Durgā Navamī · 2012

Thursday 22 November

Determinatein Sydney, under the Rashtriya Panchang method. Clear of every threshold by 18 minutes.

Decide it for

DelhiKolkataSingaporeSydneyJersey City

33°52′ S 151°12′ E · Australia/Sydney · GeoNames 2147714

The two middays

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

Midday of Wednesday 21 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:17  13:05 madhyāhna ends
Navamī begins 13:23:28
11:2911:5312:1712:4113:0513:2913:53

0 of 48 minutes covered

Midday of Thursday 22 November

Taken. The only midday Navamī reaches.

madhyāhna begins 12:18  13:06 madhyāhna ends
Navamī ends 13:39:58
11:3011:5412:1812:4213:0613:3013:54

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 13:23 on Wed 21 Nov to 13:40 on Thu 22 Nov.

    2012-11-21T02:23:28Z → 2012-11-22T02:39:58Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:17–13:05 on the 21st, 12:18–13:06 on the 22nd.

    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 21st and 48 of 48 on the 22nd.

    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 1093 s

  5. 05

    Ruling

    Durgā Navamī, Sydney, 2012: Thursday 22 November.

    confidence: determinate

Say it like this

In Sydney, Durgā Navamī 2012 falls on Thursday 22 November. Navamī runs from 13:23 on Wed 21 Nov to 13:40 on Thu 22 Nov and covers all of madhyāhna that midday.

ahargana.org/sydney/festivals/2012/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 22 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 22 Nov
compat-drikpanchangComparison profileWed 21 Nov
No institution has a recorded ruling for Sydney.

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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles18:23 → 18:4011:1548 min11:150 min21 Nov
Chicago20:23 → 20:4011:1248 min11:130 min21 Nov
Jersey City21:23 → 21:4011:1848 min11:180 min21 Nov
Port of Spain22:23 → 22:4011:2848 min11:280 min21 Nov
London02:23 → 02:4011:2248 min11:230 min21 Nov
Durban04:23 → 04:4011:1848 min11:180 min21 Nov
Dubai06:23 → 06:4011:4148 min11:410 min21 Nov
Delhi07:53 → 08:1011:4348 min11:430 min21 Nov
Kolkata07:53 → 08:1010:5848 min10:590 min21 Nov
Singapore10:23 → 10:4012:2748 min12:270 min21 Nov
Sydney13:23 → 13:4012:170 min12:1848 min22 Nov
Suva15:23 → 15:4012:280 min12:2848 min22 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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