Ruling · Durgā Navamī · 2083

Wednesday 17 November

Determinatein Perth, under the Rashtriya Panchang method. Clear of every threshold by 245 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 17 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

48 of 48 minutes covered

Midday of Thursday 18 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:38  12:26 madhyāhna ends
10:5011:1411:3812:0212:2612:5013:14

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 07:33 on Wed 17 Nov to 07:26 on Thu 18 Nov.

    2083-11-16T23:32:39Z → 2083-11-17T23:26:03Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:38–12:26 on the 17th, 11:38–12:26 on the 18th.

    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 17th and 0 of 48 on the 18th.

    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 14712 s

  5. 05

    Ruling

    Durgā Navamī, Perth, 2083: Wednesday 17 November.

    confidence: determinate

Say it like this

In Perth, Durgā Navamī 2083 falls on Wednesday 17 November. Navamī runs from 07:33 on Wed 17 Nov to 07:26 on Thu 18 Nov and covers all of madhyāhna that midday.

ahargana.org/perth/festivals/2083/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 17 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 17 Nov
compat-drikpanchangComparison profileWed 17 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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles15:33 → 15:2611:140 min11:1448 min17 Nov
Chicago17:33 → 17:2611:110 min11:1248 min17 Nov
Jersey City18:33 → 18:2611:170 min11:1748 min17 Nov
Port of Spain19:33 → 19:2611:270 min11:2748 min17 Nov
London23:33 → 23:2611:210 min11:2148 min17 Nov
Durban01:33 → 01:2611:170 min11:1748 min17 Nov
Dubai03:33 → 03:2611:400 min11:4048 min17 Nov
Delhi05:03 → 04:5611:420 min11:4248 min17 Nov
Kolkata05:03 → 04:5610:570 min10:5848 min17 Nov
Singapore07:33 → 07:2612:260 min12:2648 min17 Nov
Sydney10:33 → 10:2612:160 min12:1648 min17 Nov
Suva11:33 → 11:2611:270 min11:2743 min17 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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