Ruling · Durgā Navamī · 1978

Wednesday 8 November

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

Decide it for

PerthDelhiKolkataSingaporeSydneyJersey City

31°57′ S 115°52′ E · Australia/Perth · GeoNames 2063523

The two middays

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

Midday of Wednesday 8 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:37  12:25 madhyāhna ends
Navamī begins 11:18:42
10:4911:1311:3712:0112:2512:4913:13

48 of 48 minutes covered

Midday of Thursday 9 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:37  12:25 madhyāhna ends
10:4911:1311:3712:0112:2512:4913:13

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 11:19 on Wed 8 Nov to 09:29 on Thu 9 Nov.

    1978-11-08T03:18:42Z → 1978-11-09T01:29:02Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:37–12:25 on the 8th, 11:37–12:25 on the 9th.

    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 8th and 0 of 48 on the 9th.

    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 1070 s

  5. 05

    Ruling

    Durgā Navamī, Perth, 1978: Wednesday 8 November.

    confidence: determinate

Say it like this

In Perth, Durgā Navamī 1978 falls on Wednesday 8 November. Navamī runs from 11:19 on Wed 8 Nov to 09:29 on Thu 9 Nov and covers all of madhyāhna that midday.

ahargana.org/perth/festivals/1978/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 8 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 8 Nov
compat-drikpanchangComparison profileWed 8 Nov
No institution has a recorded ruling for Perth.

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 8thCoveredMadhyāhna 9thCoveredRuled
Los Angeles19:19 → 17:2911:1348 min11:130 min8 Nov
Chicago21:19 → 19:2911:1048 min11:100 min8 Nov
Jersey City22:19 → 20:2911:1648 min11:160 min8 Nov
Port of Spain23:19 → 21:2911:2648 min11:260 min8 Nov
London03:19 → 01:2911:2048 min11:200 min8 Nov
Durban05:19 → 03:2911:1648 min11:160 min8 Nov
Dubai07:19 → 05:2911:3848 min11:380 min8 Nov
Delhi08:49 → 06:5911:4148 min11:410 min8 Nov
Kolkata08:49 → 06:5910:5648 min10:560 min8 Nov
Singapore10:49 → 08:5911:5448 min11:540 min8 Nov
Sydney14:19 → 12:2912:150 min12:1514 min9 Nov
Suva15:19 → 13:2911:260 min11:2648 min9 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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