Ruling · Durgā Navamī · 1933

Friday 27 October

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 15 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 Thursday 26 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:19  12:07 madhyāhna ends
10:3110:5511:1911:4312:0712:3112:55

0 of 48 minutes covered

Midday of Friday 27 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:19  12:07 madhyāhna ends
Navamī ends 11:34:57
10:3110:5511:1911:4312:0712:3112:55

15 of 48 minutes covered, the first 15

Navamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Navamī runs from 12:56 on Thu 26 Oct to 11:34 on Fri 27 Oct.

    1933-10-26T09:30:50Z → 1933-10-27T08:09:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:19–12:07 on the 26th, 11:19–12:07 on the 27th.

    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 26th and 15 of 48 on the 27th.

    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 910 s

  5. 05

    Ruling

    Durgā Navamī, Tehran, 1933: Friday 27 October.

    confidence: determinate

Say it like this

In Tehran, Durgā Navamī 1933 falls on Friday 27 October. Navamī runs from 12:56 on Thu 26 Oct to 11:34 on Fri 27 Oct and covers 15 of 48 minutes of madhyāhna that midday.

ahargana.org/tehran/festivals/1933/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 27 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 27 Oct
compat-drikpanchangComparison profileFri 27 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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles01:31 → 00:0911:1348 min11:130 min26 Oct
Chicago03:31 → 02:0911:1048 min11:100 min26 Oct
Jersey City04:31 → 03:0911:1648 min11:160 min26 Oct
Port of Spain05:31 → 04:0911:2648 min11:260 min26 Oct
London09:31 → 08:0911:2048 min11:200 min26 Oct
Durban11:31 → 10:0911:1633 min11:160 min26 Oct
Dubai13:31 → 12:0911:390 min11:3931 min27 Oct
Delhi15:01 → 13:3911:410 min11:4148 min27 Oct
Kolkata15:01 → 13:3910:560 min10:5648 min27 Oct
Singapore16:51 → 15:2911:450 min11:4548 min27 Oct
Sydney19:31 → 18:0911:160 min11:1548 min27 Oct
Suva21:31 → 20:0911:270 min11:2648 min27 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

About Ahargaṇa