Ruling · Durgā Navamī · 1939

Monday 20 November

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 396 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 Sunday 19 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:07  11:55 madhyāhna ends
10:1910:4311:0711:3111:5512:1912:43

0 of 48 minutes covered

Midday of Monday 20 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:07  11:55 madhyāhna ends
10:1910:4311:0711:3111:5512:1912:43

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 18:30 on Sun 19 Nov to 21:05 on Mon 20 Nov.

    1939-11-19T12:37:18Z → 1939-11-20T15:11:46Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:07–11:55 on the 19th, 11:07–11:55 on the 20th.

    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 19th and 48 of 48 on the 20th.

    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 23730 s

  5. 05

    Ruling

    Durgā Navamī, Chattogram, 1939: Monday 20 November.

    confidence: determinate

Say it like this

In Chattogram, Durgā Navamī 1939 falls on Monday 20 November. Navamī runs from 18:30 on Sun 19 Nov to 21:05 on Mon 20 Nov and covers all of madhyāhna that midday.

ahargana.org/chattogram/festivals/1939/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 20 Nov
Ahargaṇa, classicalDisc centre, no refractionMon 20 Nov
compat-drikpanchangComparison profileMon 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles04:37 → 07:1211:1448 min11:140 min19 Nov
Chicago06:37 → 09:1211:1248 min11:120 min19 Nov
Jersey City07:37 → 10:1211:1748 min11:180 min19 Nov
Port of Spain08:37 → 11:1211:2748 min11:280 min19 Nov
London12:37 → 15:1211:220 min11:2248 min20 Nov
Durban14:37 → 17:1211:170 min11:1848 min20 Nov
Dubai16:37 → 19:1211:400 min11:4048 min20 Nov
Delhi18:07 → 20:4211:420 min11:4248 min20 Nov
Kolkata18:07 → 20:4210:580 min10:5848 min20 Nov
Singapore19:57 → 22:3211:460 min11:4648 min20 Nov
Sydney22:37 → 01:1211:170 min11:1748 min20 Nov
Suva00:37 → 03:1211:280 min11:2848 min20 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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