Ruling · Durgā Navamī · 2012

Wednesday 21 November

Determinatein Tokyo, under the Rashtriya Panchang method. Clear of every threshold by 11 minutes.

Decide it for

TokyoDelhiKolkataSingaporeSydneyJersey City

35°41′ N 139°42′ E · Asia/Tokyo · GeoNames 1850147

The two middays

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

Midday of Wednesday 21 November

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

madhyāhna begins 11:03  11:51 madhyāhna ends
Navamī begins 11:23:28
10:1510:3911:0311:2711:5112:1512:39

27 of 48 minutes covered, the last 27

Midday of Thursday 22 November

Qualifies with 37 of 48 minutes. Not taken.

madhyāhna begins 11:03  11:51 madhyāhna ends
Navamī ends 11:39:58
10:1510:3911:0311:2711:5112:1512:39

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 11:23 on Wed 21 Nov to 11:40 on Thu 22 Nov.

    2012-11-21T02:23:28Z → 2012-11-22T02:39:58Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:03–11:51 on the 21st, 11:03–11:51 on the 22nd.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Navamī must be present during madhyāhna. It covers 27 of 48 minutes on the 21st and 37 of 48 on the 22nd.

    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 675 s

  5. 05

    Ruling

    Durgā Navamī, Tokyo, 2012: Wednesday 21 November.

    confidence: determinate

Say it like this

In Tokyo, Durgā Navamī 2012 falls on Wednesday 21 November. Navamī runs from 11:23 on Wed 21 Nov to 11:40 on Thu 22 Nov and covers 27 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 37 minutes; by the rule the first midday is taken.

ahargana.org/tokyo/festivals/2012/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 21 Nov
Ahargaṇa, classicalDisc centre, no refractionWed 21 Nov
compat-drikpanchangComparison profileWed 21 Nov
No institution has a recorded ruling for Tokyo.

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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles18:23 → 18:4011:1548 min11:150 min21 Nov
Chicago20:23 → 20:4011:1248 min11:130 min21 Nov
Jersey City21:23 → 21:4011:1848 min11:180 min21 Nov
Port of Spain22:23 → 22:4011:2848 min11:280 min21 Nov
London02:23 → 02:4011:2248 min11:230 min21 Nov
Durban04:23 → 04:4011:1848 min11:180 min21 Nov
Dubai06:23 → 06:4011:4148 min11:410 min21 Nov
Delhi07:53 → 08:1011:4348 min11:430 min21 Nov
Kolkata07:53 → 08:1010:5848 min10:590 min21 Nov
Singapore10:23 → 10:4012:2748 min12:270 min21 Nov
Sydney13:23 → 13:4012:170 min12:1848 min22 Nov
Suva15:23 → 15:4012:280 min12:2848 min22 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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