Ruling · Mahānavamī · 1921

Monday 10 October

Determinatein Melbourne, under the Rashtriya Panchang method. Clear of every threshold by 401 minutes.

Decide it for

MelbourneDelhiKolkataSingaporeSydneyJersey City

37°49′ S 144°58′ E · Australia/Melbourne · GeoNames 2158177

The two middays

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

Midday of Sunday 9 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:44  12:32 madhyāhna ends
10:5611:2011:4412:0812:3212:5613:20

0 of 48 minutes covered

Midday of Monday 10 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:44  12:32 madhyāhna ends
10:5611:2011:4412:0812:3212:5613:20

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 19:13 on Sun 9 Oct to 21:31 on Mon 10 Oct.

    1921-10-09T09:12:48Z → 1921-10-10T11:31:23Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 9th, 11:44–12:32 on the 10th.

    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 9th and 48 of 48 on the 10th.

    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 24048 s

  5. 05

    Ruling

    Mahānavamī, Melbourne, 1921: Monday 10 October.

    confidence: determinate

Say it like this

In Melbourne, Mahānavamī 1921 falls on Monday 10 October. Navamī runs from 19:13 on Sun 9 Oct to 21:31 on Mon 10 Oct and covers all of madhyāhna that midday.

ahargana.org/melbourne/festivals/1921/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 10 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 10 Oct
compat-drikpanchangComparison profileMon 10 Oct
No institution has a recorded ruling for Melbourne.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/mahanavami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Navamī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“S 9 Mahanavami (purvaviddha) (In Bengal it is observed as paraviddha covering one muhurta from sunrise).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104. The Bengal reading (paraviddha, one muhūrta from sunrise) is not applied.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceNavamīMadhyāhna 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles01:13 → 03:3111:1648 min11:160 min9 Oct
Chicago04:13 → 06:3112:1448 min12:130 min9 Oct
Jersey City04:13 → 06:3111:1948 min11:190 min9 Oct
Port of Spain05:13 → 07:3111:2948 min11:290 min9 Oct
London09:13 → 11:3111:2348 min11:238 min9 Oct
Durban11:13 → 13:3111:2048 min11:1948 min9 Oct
Dubai13:13 → 15:3111:420 min11:4248 min10 Oct
Delhi14:43 → 17:0111:440 min11:4448 min10 Oct
Kolkata14:43 → 17:0111:000 min11:0048 min10 Oct
Singapore16:13 → 18:3111:280 min11:2848 min10 Oct
Sydney19:13 → 21:3111:190 min11:1948 min10 Oct
Suva21:13 → 23:3111:300 min11:3048 min10 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahanavami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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