Ruling · Mahānavamī · 2089

Wednesday 12 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 6 min 03 s.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Wednesday 12 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:02  11:50 madhyāhna ends
10:1410:3811:0211:2611:5012:1412:38

48 of 48 minutes covered

Midday of Thursday 13 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:02  11:50 madhyāhna ends
Navamī ends 10:56:01
10:1410:3811:0211:2611:5012:1412:38

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 08:30 on Wed 12 Oct to 10:56 on Thu 13 Oct.

    2089-10-12T00:30:25Z → 2089-10-13T02:56:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:02–11:50 on the 12th, 11:02–11:50 on the 13th.

    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 12th and 0 of 48 on the 13th.

    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 363 s

  5. 05

    Ruling

    Mahānavamī, Daqing, 2089: Wednesday 12 October.

    confidence: determinate

Say it like this

In Daqing, Mahānavamī 2089 falls on Wednesday 12 October. Navamī runs from 08:30 on Wed 12 Oct to 10:56 on Thu 13 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2089/mahanavami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 12 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 12 Oct
compat-drikpanchangComparison profileWed 12 Oct
No institution has a recorded ruling for Daqing.

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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles17:30 → 19:5612:1548 min12:150 min12 Oct
Chicago19:30 → 21:5612:1348 min12:130 min12 Oct
Jersey City20:30 → 22:5612:1948 min12:180 min12 Oct
Port of Spain20:30 → 22:5611:2948 min11:280 min12 Oct
London01:30 → 03:5612:2348 min12:220 min12 Oct
Durban02:30 → 04:5611:1948 min11:180 min12 Oct
Dubai04:30 → 06:5611:4148 min11:410 min12 Oct
Delhi06:00 → 08:2611:4448 min11:430 min12 Oct
Kolkata06:00 → 08:2610:5948 min10:590 min12 Oct
Singapore08:30 → 10:5612:2748 min12:270 min12 Oct
Sydney11:30 → 13:5612:1848 min12:1848 min12 Oct
Suva12:30 → 14:5611:290 min11:2948 min13 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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