Ruling · Durgā Navamī · 1941

Tuesday 28 October

Determinatein Datong, under the Rashtriya Panchang method. Clear of every threshold by 664 minutes.

Decide it for

DatongDelhiKolkataSingaporeSydneyJersey City

40°06′ N 113°17′ E · Asia/Shanghai · GeoNames 2037799

The two middays

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

Midday of Tuesday 28 October

Taken. The only midday Navamī reaches.

madhyāhna begins 12:46  13:34 madhyāhna ends
11:5812:2212:4613:1013:3413:5814:22

48 of 48 minutes covered

Midday of Wednesday 29 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:46  13:34 madhyāhna ends
11:5812:2212:4613:1013:3413:5814:22

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 01:42 on Tue 28 Oct to 01:31 on Wed 29 Oct.

    1941-10-27T16:42:11Z → 1941-10-28T16:30:33Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:46–13:34 on the 28th, 12:46–13:34 on the 29th.

    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 28th and 0 of 48 on the 29th.

    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 39857 s

  5. 05

    Ruling

    Durgā Navamī, Datong, 1941: Tuesday 28 October.

    confidence: determinate

Say it like this

In Datong, Durgā Navamī 1941 falls on Tuesday 28 October. Navamī runs from 01:42 on Tue 28 Oct to 01:31 on Wed 29 Oct and covers all of madhyāhna that midday.

ahargana.org/datong/festivals/1941/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 28 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 28 Oct
compat-drikpanchangComparison profileTue 28 Oct
No institution has a recorded ruling for Datong.

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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles08:42 → 08:3111:1348 min11:130 min27 Oct
Chicago10:42 → 10:3111:1048 min11:100 min27 Oct
Jersey City11:42 → 11:3111:1622 min11:1615 min27 Oct
Port of Spain12:42 → 12:3111:260 min11:2648 min28 Oct
London17:42 → 17:3112:200 min12:2048 min28 Oct
Durban18:42 → 18:3111:160 min11:1648 min28 Oct
Dubai20:42 → 20:3111:390 min11:3848 min28 Oct
Delhi23:12 → 23:0112:410 min12:4148 min28 Oct
Kolkata23:12 → 23:0111:560 min11:5648 min28 Oct
Singapore00:12 → 00:0111:550 min11:5448 min28 Oct
Sydney02:42 → 02:3111:150 min11:1548 min28 Oct
Suva04:42 → 04:3111:260 min11:2648 min28 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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