Ruling · Durgā Navamī · 2004

Saturday 20 November

Boundaryin Manaus, under the Rashtriya Panchang method. A threshold is only 4 min 56 s away. Say “contested”.

Decide it for

ManausDelhiKolkataSingaporeSydneyJersey City

3°06′ S 60°02′ W · America/Manaus · GeoNames 3663517

The two middays

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

Midday of Friday 19 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:22  12:10 madhyāhna ends
10:3410:5811:2211:4612:1012:3412:58

0 of 48 minutes covered

Midday of Saturday 20 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:22  12:10 madhyāhna ends
Navamī ends 12:04:58
10:3410:5811:2211:4612:1012:3412:58

43 of 48 minutes covered, the first 43

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 13:07 on Fri 19 Nov to 12:05 on Sat 20 Nov.

    2004-11-19T17:07:09Z → 2004-11-20T16:04:58Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:22–12:10 on the 19th, 11:22–12:10 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 43 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 296 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Manaus, 2004: Saturday 20 November.

    confidence: boundary (margin)

Say it like this

In Manaus, Durgā Navamī 2004 falls on Saturday 20 November. Navamī runs from 13:07 on Fri 19 Nov to 12:05 on Sat 20 Nov and covers 43 of 48 minutes of madhyāhna that midday. It is 4 min 56 s from a threshold: treat the date as contested.

ahargana.org/manaus/festivals/2004/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 20 Nov
Ahargaṇa, classicalDisc centre, no refractionSat 20 Nov
compat-drikpanchangComparison profileSat 20 Nov
No institution has a recorded ruling for Manaus.

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 Angeles09:07 → 08:0511:1448 min11:150 min19 Nov
Chicago11:07 → 10:0511:1248 min11:120 min19 Nov
Jersey City12:07 → 11:0511:180 min11:180 min20 Nov
Port of Spain13:07 → 12:0511:280 min11:2837 min20 Nov
London17:07 → 16:0511:220 min11:2248 min20 Nov
Durban19:07 → 18:0511:180 min11:1848 min20 Nov
Dubai21:07 → 20:0511:400 min11:4048 min20 Nov
Delhi22:37 → 21:3511:420 min11:4348 min20 Nov
Kolkata22:37 → 21:3510:580 min10:5848 min20 Nov
Singapore01:07 → 00:0512:260 min12:2648 min20 Nov
Sydney04:07 → 03:0512:170 min12:1748 min20 Nov
Suva05:07 → 04:0511:280 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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