Ruling · Mahāṣṭamī (Durga Ashtami) · 1917

Tuesday 23 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 22 minutes.

Decide it for

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 23 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
Aṣṭamī begins 11:22:35
10:1210:3611:0011:2411:4812:1212:36

26 of 48 minutes covered, the last 26

Midday of Wednesday 24 October

Aṣṭamī 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

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 11:23 on Tue 23 Oct to 09:45 on Wed 24 Oct.

    1917-10-23T03:22:36Z → 1917-10-24T01:44:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:00–11:48 on the 23rd, 11:00–11:48 on the 24th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 26 of 48 minutes on the 23rd and 0 of 48 on the 24th.

    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 1346 s

  5. 05

    Ruling

    Mahāṣṭamī, Daqing, 1917: Tuesday 23 October.

    confidence: determinate

Say it like this

In Daqing, Mahāṣṭamī (Durga Ashtami) 1917 falls on Tuesday 23 October. Aṣṭamī runs from 11:23 on Tue 23 Oct to 09:45 on Wed 24 Oct and covers 26 of 48 minutes of madhyāhna that midday.

ahargana.org/daqing/festivals/1917/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 23 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 23 Oct
compat-drikpanchangComparison profileTue 23 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 23rdCoveredMadhyāhna 24thCoveredRuled
Los Angeles19:23 → 17:4511:1348 min11:130 min23 Oct
Chicago21:23 → 19:4511:1148 min11:110 min23 Oct
Jersey City22:23 → 20:4511:1648 min11:160 min23 Oct
Port of Spain23:23 → 21:4511:2648 min11:260 min23 Oct
London03:23 → 01:4511:2148 min11:200 min23 Oct
Durban05:23 → 03:4511:1748 min11:160 min23 Oct
Dubai07:04 → 05:2611:2048 min11:200 min23 Oct
Delhi08:53 → 07:1511:4148 min11:410 min23 Oct
Kolkata08:53 → 07:1510:5748 min10:570 min23 Oct
Singapore10:23 → 08:4511:2548 min11:250 min23 Oct
Sydney13:23 → 11:4511:160 min11:1629 min24 Oct
Suva15:23 → 13:4511:270 min11:2748 min24 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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