Ruling · Mahāṣṭamī (Durga Ashtami) · 1912

Friday 18 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 551 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 Thursday 17 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

Midday of Friday 18 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

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 21:00 on Thu 17 Oct to 23:17 on Fri 18 Oct.

    1912-10-17T12:59:57Z → 1912-10-18T15:16:36Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 17th, 11:01–11:49 on the 18th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 17th and 48 of 48 on the 18th.

    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 33048 s

  5. 05

    Ruling

    Mahāṣṭamī, Daqing, 1912: Friday 18 October.

    confidence: determinate

Say it like this

In Daqing, Mahāṣṭamī (Durga Ashtami) 1912 falls on Friday 18 October. Aṣṭamī runs from 21:00 on Thu 17 Oct to 23:17 on Fri 18 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1912/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 18 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 18 Oct
compat-drikpanchangComparison profileFri 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles05:00 → 07:1711:1448 min11:140 min17 Oct
Chicago07:00 → 09:1711:1248 min11:110 min17 Oct
Jersey City08:00 → 10:1711:1748 min11:170 min17 Oct
Port of Spain09:00 → 11:1711:2748 min11:270 min17 Oct
London13:00 → 15:1711:220 min11:2148 min18 Oct
Durban15:00 → 17:1711:180 min11:1748 min18 Oct
Dubai16:41 → 18:5811:210 min11:2148 min18 Oct
Delhi18:30 → 20:4711:420 min11:4248 min18 Oct
Kolkata18:30 → 20:4710:580 min10:5848 min18 Oct
Singapore20:00 → 22:1711:260 min11:2648 min18 Oct
Sydney23:00 → 01:1711:170 min11:1748 min18 Oct
Suva00:55 → 03:1211:230 min11:2348 min18 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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