Ruling · Durgā Navamī · 1956

Sunday 11 November

Determinatein Datong, under the Rashtriya Panchang method. Clear of every threshold by 14 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 Sunday 11 November

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:47  12:35 madhyāhna ends
Navamī begins 12:21:01
10:5911:2311:4712:1112:3512:5913:23

14 of 48 minutes covered, the last 14

Midday of Monday 12 November

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

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 12:21 on Sun 11 Nov to 14:30 on Mon 12 Nov.

    1956-11-11T04:21:01Z → 1956-11-12T06:29:45Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 11th, 11:47–12:35 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 14 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

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 820 s

  5. 05

    Ruling

    Durgā Navamī, Datong, 1956: Sunday 11 November.

    confidence: determinate

Say it like this

In Datong, Durgā Navamī 1956 falls on Sunday 11 November. Navamī runs from 12:21 on Sun 11 Nov to 14:30 on Mon 12 Nov and covers 14 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken.

ahargana.org/datong/festivals/1956/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 11 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 11 Nov
compat-drikpanchangComparison profileSun 11 Nov
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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles20:21 → 22:3011:1348 min11:130 min11 Nov
Chicago22:21 → 00:3011:1148 min11:110 min11 Nov
Jersey City23:21 → 01:3011:1648 min11:160 min11 Nov
Port of Spain00:21 → 02:3011:2648 min11:260 min11 Nov
London04:21 → 06:3011:2048 min11:200 min11 Nov
Durban06:21 → 08:3011:1648 min11:160 min11 Nov
Dubai08:21 → 10:3011:3948 min11:390 min11 Nov
Delhi09:51 → 12:0011:4148 min11:4119 min11 Nov
Kolkata09:51 → 12:0010:5748 min10:5748 min11 Nov
Singapore11:51 → 14:0011:5548 min11:5548 min11 Nov
Sydney14:21 → 16:3011:150 min11:1648 min12 Nov
Suva16:21 → 18:3011:260 min11:2748 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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