Ruling · Durgā Navamī · 2066

Wednesday 27 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 146 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

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 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

0 of 48 minutes covered

Midday of Wednesday 27 October

Taken. The only midday Navamī reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

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 15:57 on Tue 26 Oct to 14:14 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: 11:00–11:48 on the 26th, 11:00–11:48 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 48 of 48 on the 27th.

    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 8774 s

  5. 05

    Ruling

    Durgā Navamī, Daqing, 2066: Wednesday 27 October.

    confidence: determinate

Say it like this

In Daqing, Durgā Navamī 2066 falls on Wednesday 27 October. Navamī runs from 15:57 on Tue 26 Oct to 14:14 on Wed 27 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/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 Daqing.

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

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