Ruling · Durgā Navamī · 1958

Tuesday 18 November

Determinatein Phoenix, under the Rashtriya Panchang method. Clear of every threshold by 20 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 18 November

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

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

48 of 48 minutes covered

Midday of Wednesday 19 November

Qualifies with 28 of 48 minutes. Not taken.

madhyāhna begins 11:50  12:38 madhyāhna ends
Navamī ends 12:18:00
11:0211:2611:5012:1412:3813:0213:26

28 of 48 minutes covered, the first 28

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 10:35 on Tue 18 Nov to 12:18 on Wed 19 Nov.

    1958-11-18T17:35:10Z → 1958-11-19T19:18:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 18th, 11:50–12:38 on the 19th.

    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 18th and 28 of 48 on the 19th.

    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 1175 s

  5. 05

    Ruling

    Durgā Navamī, Phoenix, 1958: Tuesday 18 November.

    confidence: determinate

Say it like this

In Phoenix, Durgā Navamī 1958 falls on Tuesday 18 November. Navamī runs from 10:35 on Tue 18 Nov to 12:18 on Wed 19 Nov and covers all of madhyāhna that midday. It also reaches the next midday for 28 minutes; by the rule the first midday is taken.

ahargana.org/phoenix/festivals/1958/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 18 Nov
Ahargaṇa, classicalDisc centre, no refractionTue 18 Nov
compat-drikpanchangComparison profileTue 18 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles09:35 → 11:1811:1448 min11:144 min18 Nov
Chicago11:35 → 13:1811:1224 min11:1248 min18 Nov
Jersey City12:35 → 14:1811:170 min11:1848 min19 Nov
Port of Spain13:35 → 15:1811:270 min11:2748 min19 Nov
London17:35 → 19:1811:210 min11:2248 min19 Nov
Durban19:35 → 21:1811:170 min11:1748 min19 Nov
Dubai21:35 → 23:1811:400 min11:4048 min19 Nov
Delhi23:05 → 00:4811:420 min11:4248 min19 Nov
Kolkata23:05 → 00:4810:580 min10:5848 min19 Nov
Singapore01:05 → 02:4811:560 min11:5648 min19 Nov
Sydney03:35 → 05:1811:160 min11:1748 min19 Nov
Suva05:35 → 07:1811:270 min11:2848 min19 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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