Ruling · Mahāṣṭamī (Durgāṣṭamī) · 2009

Saturday 26 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 545 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 Saturday 26 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:07  11:55 madhyāhna ends
10:1910:4311:0711:3111:5512:1912:43

48 of 48 minutes covered

Midday of Sunday 27 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:07  11:55 madhyāhna ends
10:1910:4311:0711:3111:5512:1912:43

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 23:44 on Fri 25 Sep to 02:01 on Sun 27 Sep.

    2009-09-25T15:44:11Z → 2009-09-26T18:01:29Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:07–11:55 on the 26th, 11:07–11:55 on the 27th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 48 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

    Only one midday qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 32710 s

  5. 05

    Ruling

    Mahāṣṭamī, Daqing, 2009: Saturday 26 September.

    confidence: determinate

Say it like this

In Daqing, Mahāṣṭamī (Durga Ashtami) 2009 falls on Saturday 26 September. Aṣṭamī runs from 23:44 on Fri 25 Sep to 02:01 on Sun 27 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2009/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 26 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 26 Sep
compat-drikpanchangComparison profileSat 26 Sep
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/mahashtami · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 8 Mahastami (paraviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles08:44 → 11:0112:2048 min12:200 min25 Sep
Chicago10:44 → 13:0112:1848 min12:1744 min26 Sep
Jersey City11:44 → 14:0112:2448 min12:2348 min26 Sep
Port of Spain11:44 → 14:0111:3437 min11:3348 min26 Sep
London16:44 → 19:0112:280 min12:2748 min26 Sep
Durban17:44 → 20:0111:240 min11:2348 min26 Sep
Dubai19:44 → 22:0111:460 min11:4648 min26 Sep
Delhi21:14 → 23:3111:490 min11:4848 min26 Sep
Kolkata21:14 → 23:3111:040 min11:0448 min26 Sep
Singapore23:44 → 02:0112:320 min12:3248 min26 Sep
Sydney01:44 → 04:0111:230 min11:2348 min26 Sep
Suva03:44 → 06:0111:340 min11:3448 min26 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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