Ruling · Durgā Navamī · 1920

Saturday 20 November

Determinatein Davao, under the Rashtriya Panchang method. Clear of every threshold by 315 minutes.

Decide it for

DavaoDelhiKolkataSingaporeSydneyJersey City

7°04′ N 125°37′ E · Asia/Manila · GeoNames 1715348

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 10:59  11:47 madhyāhna ends
10:1110:3510:5911:2311:4712:1112:35

0 of 48 minutes covered

Midday of Saturday 20 November

Taken. The only midday Navamī reaches.

madhyāhna begins 10:59  11:47 madhyāhna ends
10:1110:3510:5911:2311:4712:1112:35

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 17:02 on Fri 19 Nov to 18:12 on Sat 20 Nov.

    1920-11-19T09:02:03Z → 1920-11-20T10:11:47Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 10:59–11:47 on the 19th, 10:59–11:47 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 18909 s

  5. 05

    Ruling

    Durgā Navamī, Davao, 1920: Saturday 20 November.

    confidence: determinate

Say it like this

In Davao, Durgā Navamī 1920 falls on Saturday 20 November. Navamī runs from 17:02 on Fri 19 Nov to 18:12 on Sat 20 Nov and covers all of madhyāhna that midday.

ahargana.org/davao/festivals/1920/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 Davao.

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 Angeles01:02 → 02:1211:1448 min11:150 min19 Nov
Chicago03:02 → 04:1211:1248 min11:120 min19 Nov
Jersey City04:02 → 05:1211:1848 min11:180 min19 Nov
Port of Spain05:02 → 06:1211:2848 min11:280 min19 Nov
London09:02 → 10:1211:2248 min11:220 min19 Nov
Durban11:02 → 12:1211:1848 min11:1848 min19 Nov
Dubai13:02 → 14:1211:400 min11:4048 min20 Nov
Delhi14:32 → 15:4211:420 min11:4348 min20 Nov
Kolkata14:32 → 15:4210:580 min10:5848 min20 Nov
Singapore16:02 → 17:1211:260 min11:2648 min20 Nov
Sydney19:02 → 20:1211:170 min11:1748 min20 Nov
Suva21:02 → 22:1211:280 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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