Ruling · Durgā Navamī · 2066

Wednesday 27 October

Boundaryin Indore, under the Rashtriya Panchang method. A threshold is only 2 min 36 s away. Say “contested”.

Decide it for

IndoreDelhiKolkataSingaporeSydneyJersey City

22°43′ N 75°50′ E · Asia/Kolkata · GeoNames 1269743

The two middays

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

Midday of Tuesday 26 October

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:47  12:35 madhyāhna ends
10:5911:2311:4712:1112:3512:5913:23

0 of 48 minutes covered

Midday of Wednesday 27 October

Taken. Navamī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:47  12:35 madhyāhna ends
Navamī ends 11:43:53
10:5911:2311:4712:1112:3512:5913:23

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 13:27 on Tue 26 Oct to 11:44 on Wed 27 Oct.

    2066-10-26T07:56:58Z → 2066-10-27T06:13:54Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:47–12:35 on the 26th, 11:47–12:35 on the 27th.

    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 26th and 0 of 48 on the 27th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: purvaviddha → second-day · margin 156 s < 300 s

  5. 05

    Ruling

    Durgā Navamī, Indore, 2066: Wednesday 27 October.

    confidence: boundary (margin)

Say it like this

In Indore, Durgā Navamī 2066 falls on Wednesday 27 October. Navamī runs from 13:27 on Tue 26 Oct to 11:44 on Wed 27 Oct, and reaches madhyāhna on neither day. It is 2 min 36 s from a threshold: treat the date as contested.

ahargana.org/indore/festivals/2066/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 27 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 27 Oct
compat-drikpanchangComparison profileWed 27 Oct
No institution has a recorded ruling for Indore.

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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles00:57 → 23:1412:1348 min12:130 min26 Oct
Chicago02:57 → 01:1412:1048 min12:100 min26 Oct
Jersey City03:57 → 02:1412:1648 min12:160 min26 Oct
Port of Spain03:57 → 02:1411:2648 min11:260 min26 Oct
London08:57 → 07:1412:2048 min12:200 min26 Oct
Durban09:57 → 08:1411:1648 min11:160 min26 Oct
Dubai11:57 → 10:1411:3930 min11:390 min26 Oct
Delhi13:27 → 11:4411:410 min11:413 min27 Oct
Kolkata13:27 → 11:4410:560 min10:5648 min27 Oct
Singapore15:57 → 14:1412:250 min12:2548 min27 Oct
Sydney18:57 → 17:1412:160 min12:1548 min27 Oct
Suva19:57 → 18:1411:270 min11:2648 min27 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