Ruling · Durgā Navamī · 1976

Sunday 31 October

Determinatein Perth, under the Rashtriya Panchang method. Clear of every threshold by 338 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 Saturday 30 October

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

Midday of Sunday 31 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:36  12:24 madhyāhna ends
10:4811:1211:3612:0012:2412:4813:12

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 18:02 on Sat 30 Oct to 18:30 on Sun 31 Oct.

    1976-10-30T10:02:27Z → 1976-10-31T10:30:03Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:37–12:25 on the 30th, 11:36–12:24 on the 31st.

    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 30th and 48 of 48 on the 31st.

    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 20277 s

  5. 05

    Ruling

    Durgā Navamī, Perth, 1976: Sunday 31 October.

    confidence: determinate

Say it like this

In Perth, Durgā Navamī 1976 falls on Sunday 31 October. Navamī runs from 18:02 on Sat 30 Oct to 18:30 on Sun 31 Oct and covers all of madhyāhna that midday.

ahargana.org/perth/festivals/1976/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 31 Oct
Ahargaṇa, classicalDisc centre, no refractionSun 31 Oct
compat-drikpanchangComparison profileSun 31 Oct
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 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles03:02 → 02:3012:1248 min11:120 min30 Oct
Chicago05:02 → 04:3012:1048 min11:100 min30 Oct
Jersey City06:02 → 05:3012:1648 min11:160 min30 Oct
Port of Spain06:02 → 06:3011:2648 min11:260 min30 Oct
London10:02 → 10:3011:2048 min11:200 min30 Oct
Durban12:02 → 12:3011:161 min11:1648 min30 Oct
Dubai14:02 → 14:3011:380 min11:3848 min31 Oct
Delhi15:32 → 16:0011:410 min11:4148 min31 Oct
Kolkata15:32 → 16:0010:560 min10:5648 min31 Oct
Singapore17:32 → 18:0011:540 min11:5448 min31 Oct
Sydney20:02 → 21:3011:150 min12:1548 min31 Oct
Suva22:02 → 22:3011:260 min11:2648 min31 Oct
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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