Ruling · Mahāṣṭamī (Durga Ashtami) · 1901

Monday 21 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 102 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 Sunday 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

Midday of Monday 21 October

Taken. The only midday Aṣṭamī reaches.

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

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 13:30 on Sun 20 Oct to 14:13 on Mon 21 Oct.

    1901-10-20T05:30:16Z → 1901-10-21T06:13:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:01–11:49 on the 20th, 11:00–11:48 on the 21st.

    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 20th and 48 of 48 on the 21st.

    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 6097 s

  5. 05

    Ruling

    Mahāṣṭamī, Daqing, 1901: Monday 21 October.

    confidence: determinate

Say it like this

In Daqing, Mahāṣṭamī (Durga Ashtami) 1901 falls on Monday 21 October. Aṣṭamī runs from 13:30 on Sun 20 Oct to 14:13 on Mon 21 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1901/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 21 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 21 Oct
compat-drikpanchangComparison profileMon 21 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 20thCoveredMadhyāhna 21stCoveredRuled
Los Angeles21:30 → 22:1311:1448 min11:130 min20 Oct
Chicago23:30 → 00:1311:1148 min11:110 min20 Oct
Jersey City00:30 → 01:1311:1748 min11:170 min20 Oct
Port of Spain01:30 → 02:1311:2748 min11:270 min20 Oct
London05:30 → 06:1311:2148 min11:210 min20 Oct
Durban07:00 → 07:4310:4748 min10:470 min20 Oct
Dubai09:11 → 09:5411:2148 min11:200 min20 Oct
Delhi10:51 → 11:3411:3348 min11:332 min21 Oct
Kolkata10:51 → 11:3410:4845 min10:4846 min21 Oct
Singapore12:25 → 13:0811:210 min11:2048 min21 Oct
Sydney15:30 → 16:1311:160 min11:1648 min21 Oct
Suva17:25 → 18:0811:220 min11:2248 min21 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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