Ruling · Durgā Navamī · 1941

Monday 27 October

Boundaryin Lima, under the Rashtriya Panchang method. A threshold is only 2 min 31 s away. Say “contested”.

Decide it for

12°03′ S 77°02′ W · America/Lima · GeoNames 3936456

The two middays

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

Midday of Monday 27 October

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

madhyāhna begins 11:28  12:16 madhyāhna ends
Navamī begins 11:42:11
10:4011:0411:2811:5212:1612:4013:04

34 of 48 minutes covered, the last 34

Midday of Tuesday 28 October

Qualifies with 3 of 48 minutes. Not taken.

madhyāhna begins 11:28  12:16 madhyāhna ends
Navamī ends 11:30:33
10:4011:0411:2811:5212:1612:4013:04

3 of 48 minutes covered, the first 3

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 11:42 on Mon 27 Oct to 11:31 on Tue 28 Oct.

    1941-10-27T16:42:11Z → 1941-10-28T16:30:33Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:28–12:16 on the 27th, 11:28–12:16 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 34 of 48 minutes on the 27th and 3 of 48 on the 28th.

    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 151 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Lima, 1941: Monday 27 October.

    confidence: boundary (margin)

Say it like this

In Lima, Durgā Navamī 1941 falls on Monday 27 October. Navamī runs from 11:42 on Mon 27 Oct to 11:31 on Tue 28 Oct and covers 34 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 3 minutes; by the rule the first midday is taken. It is 2 min 31 s from a threshold: treat the date as contested.

ahargana.org/lima/festivals/1941/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 27 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 27 Oct
compat-drikpanchangComparison profileMon 27 Oct
No institution has a recorded ruling for Lima.

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 Angeles08:42 → 08:3111:1348 min11:130 min27 Oct
Chicago10:42 → 10:3111:1048 min11:100 min27 Oct
Jersey City11:42 → 11:3111:1622 min11:1615 min27 Oct
Port of Spain12:42 → 12:3111:260 min11:2648 min28 Oct
London17:42 → 17:3112:200 min12:2048 min28 Oct
Durban18:42 → 18:3111:160 min11:1648 min28 Oct
Dubai20:42 → 20:3111:390 min11:3848 min28 Oct
Delhi23:12 → 23:0112:410 min12:4148 min28 Oct
Kolkata23:12 → 23:0111:560 min11:5648 min28 Oct
Singapore00:12 → 00:0111:550 min11:5448 min28 Oct
Sydney02:42 → 02:3111:150 min11:1548 min28 Oct
Suva04:42 → 04:3111:260 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

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