Ruling · Durgā Navamī · 2055

Thursday 28 October

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 594 minutes.

Decide it for

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 Thursday 28 October

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 Friday 29 October

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 23:55 on Wed 27 Oct to 01:30 on Fri 29 Oct.

    2055-10-27T20:25:27Z → 2055-10-28T21:59:34Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:24–12:12 on the 28th, 11:24–12:12 on the 29th.

    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 28th and 0 of 48 on the 29th.

    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 35658 s

  5. 05

    Ruling

    Durgā Navamī, Tehran, 2055: Thursday 28 October.

    confidence: determinate

Say it like this

In Tehran, Durgā Navamī 2055 falls on Thursday 28 October. Navamī runs from 23:55 on Wed 27 Oct to 01:30 on Fri 29 Oct and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2055/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 28 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 28 Oct
compat-drikpanchangComparison profileThu 28 Oct
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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles13:25 → 15:0012:130 min12:1348 min28 Oct
Chicago15:25 → 17:0012:100 min12:1048 min28 Oct
Jersey City16:25 → 18:0012:160 min12:1648 min28 Oct
Port of Spain16:25 → 18:0011:260 min11:2648 min28 Oct
London21:25 → 23:0012:200 min12:2048 min28 Oct
Durban22:25 → 00:0011:160 min11:1648 min28 Oct
Dubai00:25 → 02:0011:390 min11:3848 min28 Oct
Delhi01:55 → 03:3011:410 min11:4148 min28 Oct
Kolkata01:55 → 03:3010:560 min10:5648 min28 Oct
Singapore04:25 → 06:0012:250 min12:2448 min28 Oct
Sydney07:25 → 09:0012:150 min12:1548 min28 Oct
Suva08:25 → 10:0011:260 min11:2648 min28 Oct
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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