Ruling · Durgā Navamī · 1971

Thursday 28 October

Determinatein Luanda, under the Rashtriya Panchang method. Clear of every threshold by 299 minutes.

Decide it for

LuandaDelhiKolkataSingaporeSydneyJersey City

8°50′ S 13°14′ E · Africa/Luanda · GeoNames 2240449

The two middays

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

Midday of Wednesday 27 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:27  12:15 madhyāhna ends
10:3911:0311:2711:5112:1512:3913:03

0 of 48 minutes covered

Midday of Thursday 28 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:27  12:15 madhyāhna ends
10:3911:0311:2711:5112:1512:3913:03

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 18:32 on Wed 27 Oct to 17:14 on Thu 28 Oct.

    1971-10-27T17:31:32Z → 1971-10-28T16:13:57Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:27–12:15 on the 27th, 11:27–12:15 on the 28th.

    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 27th and 48 of 48 on the 28th.

    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 17938 s

  5. 05

    Ruling

    Durgā Navamī, Luanda, 1971: Thursday 28 October.

    confidence: determinate

Say it like this

In Luanda, Durgā Navamī 1971 falls on Thursday 28 October. Navamī runs from 18:32 on Wed 27 Oct to 17:14 on Thu 28 Oct and covers all of madhyāhna that midday.

ahargana.org/luanda/festivals/1971/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 28 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 28 Oct
compat-drikpanchangComparison profileThu 28 Oct
No institution has a recorded ruling for Luanda.

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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles10:32 → 09:1412:1348 min12:130 min27 Oct
Chicago12:32 → 11:1412:1027 min12:100 min27 Oct
Jersey City13:32 → 12:1412:160 min12:160 min28 Oct
Port of Spain13:32 → 12:1411:260 min11:2648 min28 Oct
London18:32 → 17:1412:200 min12:2048 min28 Oct
Durban19:32 → 18:1411:160 min11:1648 min28 Oct
Dubai21:32 → 20:1411:390 min11:3848 min28 Oct
Delhi23:02 → 21:4411:410 min11:4148 min28 Oct
Kolkata23:02 → 21:4410:560 min10:5648 min28 Oct
Singapore01:02 → 23:4411:550 min11:5448 min28 Oct
Sydney03:32 → 02:1411:150 min11:1548 min28 Oct
Suva05:32 → 04:1411:260 min11:2648 min28 Oct
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

About Ahargaṇa