Ruling · Durgā Navamī · 2051

Sunday 12 November

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 432 minutes.

Decide it for

TehranDelhiKolkataSingaporeSydneyJersey City

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two middays

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

Midday of Sunday 12 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:24  12:12 madhyāhna ends
10:3611:0011:2411:4812:1212:3613:00

48 of 48 minutes covered

Midday of Monday 13 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:24  12:12 madhyāhna ends
10:3611:0011:2411:4812:1212:3613:00

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 04:12 on Sun 12 Nov to 02:52 on Mon 13 Nov.

    2051-11-12T00:41:57Z → 2051-11-12T23:21:42Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:24–12:12 on the 12th, 11:24–12:12 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 25940 s

  5. 05

    Ruling

    Durgā Navamī, Tehran, 2051: Sunday 12 November.

    confidence: determinate

Say it like this

In Tehran, Durgā Navamī 2051 falls on Sunday 12 November. Navamī runs from 04:12 on Sun 12 Nov to 02:52 on Mon 13 Nov and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2051/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 12 Nov
Ahargaṇa, classicalDisc centre, no refractionSun 12 Nov
compat-drikpanchangComparison profileSun 12 Nov
No institution has a recorded ruling for Tehran.

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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles16:42 → 15:2211:1348 min11:130 min12 Nov
Chicago18:42 → 17:2211:1148 min11:110 min12 Nov
Jersey City19:42 → 18:2211:1648 min11:160 min12 Nov
Port of Spain20:42 → 19:2211:2648 min11:260 min12 Nov
London00:42 → 23:2211:2048 min11:210 min12 Nov
Durban02:42 → 01:2211:1648 min11:160 min12 Nov
Dubai04:42 → 03:2211:3948 min11:390 min12 Nov
Delhi06:12 → 04:5211:4148 min11:410 min12 Nov
Kolkata06:12 → 04:5210:5748 min10:570 min12 Nov
Singapore08:42 → 07:2212:2548 min12:250 min12 Nov
Sydney11:42 → 10:2212:1648 min12:160 min12 Nov
Suva12:42 → 11:2211:270 min11:270 min13 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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