Ruling · Durgā Navamī · 2069

Saturday 23 November

Boundaryin Tehran, under the Rashtriya Panchang method. A threshold is only 0 min 51 s away. Say “contested”.

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 22 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:26  12:14 madhyāhna ends
Navamī begins 12:40:38
10:3811:0211:2611:5012:1412:3813:02

0 of 48 minutes covered

Midday of Saturday 23 November

Taken. Navamī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:27  12:15 madhyāhna ends
Navamī ends 11:25:55
10:3911:0311:2711:5112:1512:3913:03

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 12:41 on Fri 22 Nov to 11:26 on Sat 23 Nov.

    2069-11-22T09:10:38Z → 2069-11-23T07:55:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:26–12:14 on the 22nd, 11:27–12:15 on the 23rd.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 0 of 48 minutes on the 22nd and 0 of 48 on the 23rd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: purvaviddha → second-day · margin 51 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Tehran, 2069: Saturday 23 November.

    confidence: boundary (margin)

Say it like this

In Tehran, Durgā Navamī 2069 falls on Saturday 23 November. Navamī runs from 12:41 on Fri 22 Nov to 11:26 on Sat 23 Nov, and reaches madhyāhna on neither day. It is 0 min 51 s from a threshold: treat the date as contested.

ahargana.org/tehran/festivals/2069/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 23 Nov
Ahargaṇa, classicalDisc centre, no refractionSat 23 Nov
compat-drikpanchangComparison profileFri 22 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 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles01:11 → 23:5611:1548 min11:160 min22 Nov
Chicago03:11 → 01:5611:1348 min11:130 min22 Nov
Jersey City04:11 → 02:5611:1948 min11:190 min22 Nov
Port of Spain05:11 → 03:5611:2848 min11:290 min22 Nov
London09:11 → 07:5611:2348 min11:230 min22 Nov
Durban11:11 → 09:5611:1848 min11:190 min22 Nov
Dubai13:11 → 11:5611:410 min11:4115 min23 Nov
Delhi14:41 → 13:2611:430 min11:4448 min23 Nov
Kolkata14:41 → 13:2610:590 min10:5948 min23 Nov
Singapore17:11 → 15:5612:270 min12:2748 min23 Nov
Sydney20:11 → 18:5612:180 min12:1848 min23 Nov
Suva21:11 → 19:5611:290 min11:2948 min23 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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