Ruling · Mahāṣṭamī (Durgāṣṭamī) · 2091

Friday 19 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 288 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 Friday 19 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:01  11:49 madhyāhna ends
10:1310:3711:0111:2511:4912:1312:37

48 of 48 minutes covered

Midday of Saturday 20 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:01  11:49 madhyāhna ends
10:1310:3711:0111:2511:4912:1312:37

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 06:13 on Fri 19 Oct to 05:43 on Sat 20 Oct.

    2091-10-18T22:12:50Z → 2091-10-19T21:43:04Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 19th, 11:01–11:49 on the 20th.

    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 19th and 0 of 48 on the 20th.

    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 17285 s

  5. 05

    Ruling

    Mahāṣṭamī, Daqing, 2091: Friday 19 October.

    confidence: determinate

Say it like this

In Daqing, Mahāṣṭamī (Durga Ashtami) 2091 falls on Friday 19 October. Aṣṭamī runs from 06:13 on Fri 19 Oct to 05:43 on Sat 20 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2091/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 19 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 19 Oct
compat-drikpanchangComparison profileFri 19 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/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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles15:13 → 14:4312:140 min12:1448 min19 Oct
Chicago17:13 → 16:4312:120 min12:1148 min19 Oct
Jersey City18:13 → 17:4312:170 min12:1748 min19 Oct
Port of Spain18:13 → 17:4311:270 min11:2748 min19 Oct
London23:13 → 22:4312:210 min12:2148 min19 Oct
Durban00:13 → 23:4311:180 min11:1748 min19 Oct
Dubai02:13 → 01:4311:400 min11:4048 min19 Oct
Delhi03:43 → 03:1311:420 min11:4248 min19 Oct
Kolkata03:43 → 03:1310:580 min10:5848 min19 Oct
Singapore06:13 → 05:4312:260 min12:2648 min19 Oct
Sydney09:13 → 08:4312:170 min12:1748 min19 Oct
Suva10:13 → 09:4311:280 min11:2848 min19 Oct
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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