Ruling · Durgā Navamī · 1975

Wednesday 12 November

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 209 minutes.

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 Tuesday 11 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

0 of 48 minutes covered

Midday of Wednesday 12 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

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 15:17 on Tue 11 Nov to 17:30 on Wed 12 Nov.

    1975-11-11T07:16:58Z → 1975-11-12T09:29:51Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:00–11:48 on the 11th, 11:00–11:48 on the 12th.

    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 11th and 48 of 48 on the 12th.

    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 12555 s

  5. 05

    Ruling

    Durgā Navamī, Daqing, 1975: Wednesday 12 November.

    confidence: determinate

Say it like this

In Daqing, Durgā Navamī 1975 falls on Wednesday 12 November. Navamī runs from 15:17 on Tue 11 Nov to 17:30 on Wed 12 Nov and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1975/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 12 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 12 Nov
compat-drikpanchangComparison profileWed 12 Nov
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/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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles23:17 → 01:3011:1348 min11:130 min11 Nov
Chicago01:17 → 03:3011:1048 min11:110 min11 Nov
Jersey City02:17 → 04:3011:1648 min11:160 min11 Nov
Port of Spain03:17 → 05:3011:2648 min11:260 min11 Nov
London07:17 → 09:3011:2048 min11:200 min11 Nov
Durban09:17 → 11:3011:1648 min11:1614 min11 Nov
Dubai11:17 → 13:3011:3948 min11:3948 min11 Nov
Delhi12:47 → 15:0011:410 min11:4148 min12 Nov
Kolkata12:47 → 15:0010:560 min10:5748 min12 Nov
Singapore14:47 → 17:0011:550 min11:5548 min12 Nov
Sydney18:17 → 20:3012:150 min12:1548 min12 Nov
Suva19:17 → 21:3011:260 min11:2648 min12 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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