Ruling · Durgā Navamī · 2089

Friday 11 November

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 517 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 Friday 11 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 Saturday 12 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:25  12:13 madhyāhna ends
10:3711:0111:2511:4912:1312:3713:01

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 00:17 on Fri 11 Nov to 02:48 on Sat 12 Nov.

    2089-11-10T20:47:26Z → 2089-11-11T23:17:39Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:24–12:12 on the 11th, 11:25–12:13 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 48 of 48 minutes on the 11th and 0 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 31016 s

  5. 05

    Ruling

    Durgā Navamī, Tehran, 2089: Friday 11 November.

    confidence: determinate

Say it like this

In Tehran, Durgā Navamī 2089 falls on Friday 11 November. Navamī runs from 00:17 on Fri 11 Nov to 02:48 on Sat 12 Nov and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2089/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 11 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 11 Nov
compat-drikpanchangComparison profileFri 11 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 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles12:47 → 15:1811:130 min11:1348 min11 Nov
Chicago14:47 → 17:1811:110 min11:1148 min11 Nov
Jersey City15:47 → 18:1811:160 min11:1648 min11 Nov
Port of Spain16:47 → 19:1811:260 min11:2648 min11 Nov
London20:47 → 23:1811:200 min11:2148 min11 Nov
Durban22:47 → 01:1811:160 min11:1648 min11 Nov
Dubai00:47 → 03:1811:390 min11:3948 min11 Nov
Delhi02:17 → 04:4811:410 min11:4148 min11 Nov
Kolkata02:17 → 04:4810:570 min10:5748 min11 Nov
Singapore04:47 → 07:1812:250 min12:2548 min11 Nov
Sydney07:47 → 10:1812:160 min12:1648 min11 Nov
Suva08:47 → 11:1811:270 min11:2748 min11 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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