Ruling · Durgā Navamī · 1931

Tuesday 17 November

Determinatein Phoenix, under the Rashtriya Panchang method. Clear of every threshold by 83 minutes.

Decide it for

PhoenixDelhiKolkataSingaporeSydneyJersey City

33°27′ N 112°04′ W · America/Phoenix · GeoNames 5308655

The two middays

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

Midday of Tuesday 17 November

Taken. The only midday Navamī reaches.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

48 of 48 minutes covered

Midday of Wednesday 18 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

0 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 08:10 on Tue 17 Nov to 10:27 on Wed 18 Nov.

    1931-11-17T15:09:34Z → 1931-11-18T17:26:39Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 17th, 11:49–12:37 on the 18th.

    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 17th and 0 of 48 on the 18th.

    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 4958 s

  5. 05

    Ruling

    Durgā Navamī, Phoenix, 1931: Tuesday 17 November.

    confidence: determinate

Say it like this

In Phoenix, Durgā Navamī 1931 falls on Tuesday 17 November. Navamī runs from 08:10 on Tue 17 Nov to 10:27 on Wed 18 Nov and covers all of madhyāhna that midday.

ahargana.org/phoenix/festivals/1931/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 17 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 17 Nov
compat-drikpanchangComparison profileTue 17 Nov
No institution has a recorded ruling for Phoenix.

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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles07:10 → 09:2711:1448 min11:140 min17 Nov
Chicago09:10 → 11:2711:1148 min11:1215 min17 Nov
Jersey City10:10 → 12:2711:1748 min11:1748 min17 Nov
Port of Spain11:10 → 13:2711:2748 min11:2748 min17 Nov
London15:10 → 17:2711:210 min11:2148 min18 Nov
Durban17:10 → 19:2711:170 min11:1748 min18 Nov
Dubai19:10 → 21:2711:400 min11:4048 min18 Nov
Delhi20:40 → 22:5711:420 min11:4248 min18 Nov
Kolkata20:40 → 22:5710:570 min10:5748 min18 Nov
Singapore22:10 → 00:2711:250 min11:2648 min18 Nov
Sydney01:10 → 03:2711:160 min11:1648 min18 Nov
Suva03:10 → 05:2711:270 min11:2748 min18 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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