Ruling · Durgā Navamī · 2015

Friday 20 November

Determinatein Harbin, under the Rashtriya Panchang method. Clear of every threshold by 556 minutes.

Decide it for

HarbinDelhiKolkataSingaporeSydneyJersey City

45°45′ N 126°39′ E · Asia/Shanghai · GeoNames 2037013

The two middays

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

Midday of Friday 20 November

Taken. The only midday Navamī reaches.

madhyāhna begins 10:55  11:43 madhyāhna ends
10:0710:3110:5511:1911:4312:0712:31

48 of 48 minutes covered

Midday of Saturday 21 November

Navamī is absent from madhyāhna. Not taken.

madhyāhna begins 10:55  11:43 madhyāhna ends
10:0710:3110:5511:1911:4312:0712:31

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 01:39 on Fri 20 Nov to 23:43 on Fri 20 Nov.

    2015-11-19T17:38:50Z → 2015-11-20T15:42:44Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 10:55–11:43 on the 20th, 10:55–11:43 on the 21st.

    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 20th and 0 of 48 on the 21st.

    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 33349 s

  5. 05

    Ruling

    Durgā Navamī, Harbin, 2015: Friday 20 November.

    confidence: determinate

Say it like this

In Harbin, Durgā Navamī 2015 falls on Friday 20 November. Navamī runs from 01:39 on Fri 20 Nov to 23:43 on Fri 20 Nov and covers all of madhyāhna that midday.

ahargana.org/harbin/festivals/2015/durga-navami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 20 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 20 Nov
compat-drikpanchangComparison profileFri 20 Nov
No institution has a recorded ruling for Harbin.

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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles09:39 → 07:4311:1448 min11:140 min19 Nov
Chicago11:39 → 09:4311:1221 min11:120 min19 Nov
Jersey City12:39 → 10:4311:170 min11:180 min20 Nov
Port of Spain13:39 → 11:4311:270 min11:2815 min20 Nov
London17:39 → 15:4311:220 min11:2248 min20 Nov
Durban19:39 → 17:4311:170 min11:1848 min20 Nov
Dubai21:39 → 19:4311:400 min11:4048 min20 Nov
Delhi23:09 → 21:1311:420 min11:4248 min20 Nov
Kolkata23:09 → 21:1310:580 min10:5848 min20 Nov
Singapore01:39 → 23:4312:260 min12:2648 min20 Nov
Sydney04:39 → 02:4312:170 min12:1748 min20 Nov
Suva06:39 → 04:4312:280 min12:2848 min20 Nov
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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