Ruling · Durgā Navamī · 1983

Sunday 13 November

Determinatein Thāne, under the Rashtriya Panchang method. Clear of every threshold by 16 minutes.

Decide it for

19°12′ N 72°58′ E · Asia/Kolkata · GeoNames 1254661

The two middays

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

Midday of Sunday 13 November

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

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

48 of 48 minutes covered

Midday of Monday 14 November

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:58  12:46 madhyāhna ends
Navamī ends 13:02:13
11:1011:3411:5812:2212:4613:1013:34

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 10:35 on Sun 13 Nov to 13:02 on Mon 14 Nov.

    1983-11-13T05:05:03Z → 1983-11-14T07:32:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 13th, 11:58–12:46 on the 14th.

    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 13th and 48 of 48 on the 14th.

    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 950 s

  5. 05

    Ruling

    Durgā Navamī, Thāne, 1983: Sunday 13 November.

    confidence: determinate

Say it like this

In Thāne, Durgā Navamī 1983 falls on Sunday 13 November. Navamī runs from 10:35 on Sun 13 Nov to 13:02 on Mon 14 Nov and covers all of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken.

ahargana.org/thane/festivals/1983/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 13 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 13 Nov
compat-drikpanchangComparison profileSun 13 Nov
No institution has a recorded ruling for Thāne.

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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles21:05 → 23:3211:1348 min11:130 min13 Nov
Chicago23:05 → 01:3211:1148 min11:110 min13 Nov
Jersey City00:05 → 02:3211:1648 min11:160 min13 Nov
Port of Spain01:05 → 03:3211:2648 min11:260 min13 Nov
London05:05 → 07:3211:2048 min11:210 min13 Nov
Durban07:05 → 09:3211:1648 min11:160 min13 Nov
Dubai09:05 → 11:3211:3948 min11:390 min13 Nov
Delhi10:35 → 13:0211:4148 min11:4148 min13 Nov
Kolkata10:35 → 13:0210:5748 min10:5748 min13 Nov
Singapore13:05 → 15:3212:258 min12:2548 min13 Nov
Sydney16:05 → 18:3212:160 min12:1648 min14 Nov
Suva17:05 → 19:3211:270 min11:2748 min14 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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