Ruling · Mahānavamī · 2026

Tuesday 20 October

Determinatein Sydney, under the Rashtriya Panchang method. Clear of every threshold by 198 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 Monday 19 October

Navamī is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Tuesday 20 October

Taken. The only midday Navamī reaches.

madhyāhna begins 12:16  13:04 madhyāhna ends
11:2811:5212:1612:4013:0413:2813:52

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 16:22 on Mon 19 Oct to 18:21 on Tue 20 Oct.

    2026-10-19T05:22:16Z → 2026-10-20T07:20:56Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:17–13:05 on the 19th, 12:16–13:04 on the 20th.

    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 19th and 48 of 48 on the 20th.

    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 11866 s

  5. 05

    Ruling

    Mahānavamī, Sydney, 2026: Tuesday 20 October.

    confidence: determinate

Say it like this

In Sydney, Mahānavamī 2026 falls on Tuesday 20 October. Navamī runs from 16:22 on Mon 19 Oct to 18:21 on Tue 20 Oct and covers all of madhyāhna that midday.

ahargana.org/sydney/festivals/2026/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 20 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 20 Oct
compat-drikpanchangComparison profileTue 20 Oct
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/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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles22:22 → 00:2112:1448 min12:130 min19 Oct
Chicago00:22 → 02:2112:1148 min12:110 min19 Oct
Jersey City01:22 → 03:2112:1748 min12:170 min19 Oct
Port of Spain01:22 → 03:2111:2748 min11:270 min19 Oct
London06:22 → 08:2112:2148 min12:210 min19 Oct
Durban07:22 → 09:2111:1748 min11:170 min19 Oct
Dubai09:22 → 11:2111:4048 min11:390 min19 Oct
Delhi10:52 → 12:5111:4248 min11:4248 min19 Oct
Kolkata10:52 → 12:5110:5748 min10:5748 min19 Oct
Singapore13:22 → 15:2112:260 min12:2548 min20 Oct
Sydney16:22 → 18:2112:170 min12:1648 min20 Oct
Suva17:22 → 19:2111:270 min11:2748 min20 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