Ruling · Mahāṣṭamī (Durgāṣṭamī) · 2051

Friday 13 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 450 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Thursday 12 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:41  12:29 madhyāhna ends
10:5311:1711:4112:0512:2912:5313:17

0 of 48 minutes covered

Midday of Friday 13 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:40  12:28 madhyāhna ends
10:5211:1611:4012:0412:2812:5213:16

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 19:59 on Thu 12 Oct to 20:14 on Fri 13 Oct.

    2051-10-12T11:58:35Z → 2051-10-13T12:14:14Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 12th, 11:40–12:28 on the 13th.

    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 12th and 48 of 48 on the 13th.

    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 27004 s

  5. 05

    Ruling

    Mahāṣṭamī, Baoding, 2051: Friday 13 October.

    confidence: determinate

Say it like this

In Baoding, Mahāṣṭamī (Durga Ashtami) 2051 falls on Friday 13 October. Aṣṭamī runs from 19:59 on Thu 12 Oct to 20:14 on Fri 13 Oct and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/2051/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 13 Oct
Ahargaṇa, classicalDisc centre, no refractionFri 13 Oct
compat-drikpanchangComparison profileFri 13 Oct
No institution has a recorded ruling for Baoding.

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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles04:59 → 05:1412:1548 min12:150 min12 Oct
Chicago06:59 → 07:1412:1348 min12:130 min12 Oct
Jersey City07:59 → 08:1412:1948 min12:180 min12 Oct
Port of Spain07:59 → 08:1411:2948 min11:280 min12 Oct
London12:59 → 13:1412:2312 min12:2248 min13 Oct
Durban13:59 → 14:1411:190 min11:1848 min13 Oct
Dubai15:59 → 16:1411:410 min11:4148 min13 Oct
Delhi17:29 → 17:4411:430 min11:4348 min13 Oct
Kolkata17:29 → 17:4410:590 min10:5948 min13 Oct
Singapore19:59 → 20:1412:270 min12:2748 min13 Oct
Sydney22:59 → 23:1412:180 min12:1848 min13 Oct
Suva23:59 → 00:1411:290 min11:2948 min13 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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