Ruling · Durgā Navamī · 1981

Friday 6 November

Determinatein Bursa, under the Rashtriya Panchang method. Clear of every threshold by 200 minutes.

Decide it for

BursaDelhiKolkataSingaporeSydneyJersey City

40°12′ N 29°04′ E · Europe/Istanbul · GeoNames 750269

The two middays

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

Midday of Thursday 5 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:23  13:11 madhyāhna ends
11:3511:5912:2312:4713:1113:3513:59

0 of 48 minutes covered

Midday of Friday 6 November

Taken. The only midday Navamī reaches.

madhyāhna begins 12:23  13:11 madhyāhna ends
11:3511:5912:2312:4713:1113:3513:59

48 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 16:31 on Thu 5 Nov to 16:38 on Fri 6 Nov.

    1981-11-05T13:31:29Z → 1981-11-06T13:37:49Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:23–13:11 on the 5th, 12:23–13:11 on the 6th.

    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 5th and 48 of 48 on the 6th.

    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 12020 s

  5. 05

    Ruling

    Durgā Navamī, Bursa, 1981: Friday 6 November.

    confidence: determinate

Say it like this

In Bursa, Durgā Navamī 1981 falls on Friday 6 November. Navamī runs from 16:31 on Thu 5 Nov to 16:38 on Fri 6 Nov and covers all of madhyāhna that midday.

ahargana.org/bursa/festivals/1981/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 6 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 6 Nov
compat-drikpanchangComparison profileFri 6 Nov
No institution has a recorded ruling for Bursa.

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 5thCoveredMadhyāhna 6thCoveredRuled
Los Angeles05:31 → 05:3811:1248 min11:120 min5 Nov
Chicago07:31 → 07:3811:1048 min11:100 min5 Nov
Jersey City08:31 → 08:3811:1648 min11:160 min5 Nov
Port of Spain09:31 → 09:3811:2648 min11:260 min5 Nov
London13:31 → 13:3811:200 min11:2048 min6 Nov
Durban15:31 → 15:3811:160 min11:1648 min6 Nov
Dubai17:31 → 17:3811:380 min11:3848 min6 Nov
Delhi19:01 → 19:0811:410 min11:4148 min6 Nov
Kolkata19:01 → 19:0810:560 min10:5648 min6 Nov
Singapore21:01 → 21:0811:540 min11:5448 min6 Nov
Sydney00:31 → 00:3812:150 min12:1548 min6 Nov
Suva01:31 → 01:3811:260 min11:2648 min6 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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