Ruling · Mahāṣṭamī (Durga Ashtami) · 1957

Tuesday 1 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 95 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 Monday 30 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:06  11:54 madhyāhna ends
10:1810:4211:0611:3011:5412:1812:42

0 of 48 minutes covered

Midday of Tuesday 1 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:05  11:53 madhyāhna ends
10:1710:4111:0511:2911:5312:1712:41

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 13:28 on Mon 30 Sep to 14:21 on Tue 1 Oct.

    1957-09-30T05:28:19Z → 1957-10-01T06:20:32Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:06–11:54 on the 30th, 11:05–11:53 on the 1st.

    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 30th and 48 of 48 on the 1st.

    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 5673 s

  5. 05

    Ruling

    Mahāṣṭamī, Daqing, 1957: Tuesday 1 October.

    confidence: determinate

Say it like this

In Daqing, Mahāṣṭamī (Durga Ashtami) 1957 falls on Tuesday 1 October. Aṣṭamī runs from 13:28 on Mon 30 Sep to 14:21 on Tue 1 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1957/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 1 Oct
Ahargaṇa, classicalDisc centre, no refractionTue 1 Oct
compat-drikpanchangComparison profileTue 1 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 30thCoveredMadhyāhna 1stCoveredRuled
Los Angeles21:28 → 22:2111:1948 min11:180 min30 Sep
Chicago00:28 → 01:2112:1648 min12:160 min30 Sep
Jersey City01:28 → 02:2112:2248 min12:220 min30 Sep
Port of Spain01:28 → 02:2111:3248 min11:320 min30 Sep
London06:28 → 07:2112:2648 min12:260 min30 Sep
Durban07:28 → 08:2111:2248 min11:220 min30 Sep
Dubai09:28 → 10:2111:4548 min11:440 min30 Sep
Delhi10:58 → 11:5111:4748 min11:474 min1 Oct
Kolkata10:58 → 11:5111:0348 min11:0248 min1 Oct
Singapore12:58 → 13:5112:010 min12:0048 min1 Oct
Sydney15:28 → 16:2111:220 min11:2148 min1 Oct
Suva17:28 → 18:2111:330 min11:3248 min1 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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