Ruling · Durgā Navamī · 2036

Monday 27 October

Boundaryin Lima, under the Rashtriya Panchang method. A threshold is only 3 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
10:4011:0411:2811:5212:1612:4013:04

48 of 48 minutes covered

Midday of Tuesday 28 October

Qualifies with 44 of 48 minutes. Not taken.

madhyāhna begins 11:28  12:16 madhyāhna ends
Navamī ends 12:12:25
10:4011:0411:2811:5212:1612:4013:04

44 of 48 minutes covered, the first 44

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

How it was decided

  1. 01

    Aṅga

    Navamī runs from 09:32 on Mon 27 Oct to 12:12 on Tue 28 Oct.

    2036-10-27T14:31:59Z → 2036-10-28T17:12:26Z

  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 48 of 48 minutes on the 27th and 44 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 211 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Lima, 2036: Monday 27 October.

    confidence: boundary (margin)

Say it like this

In Lima, Durgā Navamī 2036 falls on Monday 27 October. Navamī runs from 09:32 on Mon 27 Oct to 12:12 on Tue 28 Oct and covers all of madhyāhna that midday. It also reaches the next midday for 44 minutes; by the rule the first midday is taken. It is 3 min 31 s from a threshold: treat the date as contested.

ahargana.org/lima/festivals/2036/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 Angeles07:32 → 10:1212:1348 min12:120 min27 Oct
Chicago09:32 → 12:1212:1048 min12:102 min27 Oct
Jersey City10:32 → 13:1212:1648 min12:1648 min27 Oct
Port of Spain10:32 → 13:1211:2648 min11:2648 min27 Oct
London14:32 → 17:1211:200 min11:2048 min28 Oct
Durban16:32 → 19:1211:160 min11:1648 min28 Oct
Dubai18:32 → 21:1211:380 min11:3848 min28 Oct
Delhi20:02 → 22:4211:410 min11:4148 min28 Oct
Kolkata20:02 → 22:4210:560 min10:5648 min28 Oct
Singapore22:32 → 01:1212:240 min12:2448 min28 Oct
Sydney01:32 → 04:1212:150 min12:1548 min28 Oct
Suva02:32 → 05:1211:260 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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