Ruling · Durgā Navamī · 2077

Wednesday 24 November

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 508 minutes.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733

The two middays

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

Midday of Tuesday 23 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:15  12:03 madhyāhna ends
10:2710:5111:1511:3912:0312:2712:51

0 of 48 minutes covered

Midday of Wednesday 24 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:16  12:04 madhyāhna ends
10:2810:5211:1611:4012:0412:2812:52

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 22:38 on Tue 23 Nov to 20:31 on Wed 24 Nov.

    2077-11-23T16:38:13Z → 2077-11-24T14:31:10Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:15–12:03 on the 23rd, 11:16–12:04 on the 24th.

    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 23rd and 48 of 48 on the 24th.

    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 30460 s

  5. 05

    Ruling

    Durgā Navamī, Chattogram, 2077: Wednesday 24 November.

    confidence: determinate

Say it like this

In Chattogram, Durgā Navamī 2077 falls on Wednesday 24 November. Navamī runs from 22:38 on Tue 23 Nov to 20:31 on Wed 24 Nov and covers all of madhyāhna that midday.

ahargana.org/chattogram/festivals/2077/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 24 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 24 Nov
compat-drikpanchangComparison profileWed 24 Nov
No institution has a recorded ruling for Chattogram.

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 23rdCoveredMadhyāhna 24thCoveredRuled
Los Angeles08:38 → 06:3111:1648 min11:160 min23 Nov
Chicago10:38 → 08:3111:1348 min11:130 min23 Nov
Jersey City11:38 → 09:3111:1929 min11:190 min23 Nov
Port of Spain12:38 → 10:3111:290 min11:290 min24 Nov
London16:38 → 14:3111:230 min11:2348 min24 Nov
Durban18:38 → 16:3111:190 min11:1948 min24 Nov
Dubai20:38 → 18:3111:410 min11:4248 min24 Nov
Delhi22:08 → 20:0111:440 min11:4448 min24 Nov
Kolkata22:08 → 20:0110:590 min10:5948 min24 Nov
Singapore00:38 → 22:3112:270 min12:2848 min24 Nov
Sydney03:38 → 01:3112:180 min12:1848 min24 Nov
Suva04:38 → 02:3111:290 min11:2948 min24 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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