Ruling · Durgā Navamī · 2080

Wednesday 20 November

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 11 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 Wednesday 20 November

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:14  12:02 madhyāhna ends
10:2610:5011:1411:3812:0212:2612:50

48 of 48 minutes covered

Midday of Thursday 21 November

Qualifies with 37 of 48 minutes. Not taken.

madhyāhna begins 11:15  12:03 madhyāhna ends
Navamī ends 11:52:03
10:2710:5111:1511:3912:0312:2712:51

37 of 48 minutes covered, the first 37

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 09:37 on Wed 20 Nov to 11:52 on Thu 21 Nov.

    2080-11-20T03:36:31Z → 2080-11-21T05:52:03Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:14–12:02 on the 20th, 11:15–12:03 on the 21st.

    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 20th and 37 of 48 on the 21st.

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

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 641 s

  5. 05

    Ruling

    Durgā Navamī, Chattogram, 2080: Wednesday 20 November.

    confidence: determinate

Say it like this

In Chattogram, Durgā Navamī 2080 falls on Wednesday 20 November. Navamī runs from 09:37 on Wed 20 Nov to 11:52 on Thu 21 Nov and covers all of madhyāhna that midday. It also reaches the next midday for 37 minutes; by the rule the first midday is taken.

ahargana.org/chattogram/festivals/2080/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 20 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 20 Nov
compat-drikpanchangComparison profileWed 20 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles19:37 → 21:5211:1548 min11:150 min20 Nov
Chicago21:37 → 23:5211:1248 min11:130 min20 Nov
Jersey City22:37 → 00:5211:1848 min11:180 min20 Nov
Port of Spain23:37 → 01:5211:2848 min11:280 min20 Nov
London03:37 → 05:5211:2248 min11:220 min20 Nov
Durban05:37 → 07:5211:1848 min11:180 min20 Nov
Dubai07:37 → 09:5211:4148 min11:410 min20 Nov
Delhi09:07 → 11:2211:4348 min11:430 min20 Nov
Kolkata09:07 → 11:2210:5848 min10:5923 min20 Nov
Singapore11:37 → 13:5212:2648 min12:2748 min20 Nov
Sydney14:37 → 16:5212:170 min12:1748 min21 Nov
Suva15:37 → 17:5211:280 min11:2848 min21 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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