Ruling · Mahāṣṭamī (Durga Ashtami) · 1930

Tuesday 30 September

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 26 s away. Say “contested”.

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 Monday 29 September

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:44  12:32 madhyāhna ends
10:5611:2011:4412:0812:3212:5613:20

48 of 48 minutes covered

Midday of Tuesday 30 September

Taken. Both middays qualify; the rule takes the second.

madhyāhna begins 11:44  12:32 madhyāhna ends
Aṣṭamī ends 11:46:34
10:5611:2011:4412:0812:3212:5613:20

2 of 48 minutes covered, the first 2

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 10:18 on Mon 29 Sep to 11:47 on Tue 30 Sep.

    1930-09-29T02:17:55Z → 1930-09-30T03:46:34Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:44–12:32 on the 29th, 11:44–12:32 on the 30th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 48 of 48 minutes on the 29th and 2 of 48 on the 30th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 146 s < 300 s

  5. 05

    Ruling

    Mahāṣṭamī, Baoding, 1930: Tuesday 30 September.

    confidence: boundary (margin)

Say it like this

In Baoding, Mahāṣṭamī (Durga Ashtami) 1930 falls on Tuesday 30 September. Aṣṭamī runs from 10:18 on Mon 29 Sep to 11:47 on Tue 30 Sep and covers 2 of 48 minutes of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken. It is 2 min 26 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1930/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 30 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 30 Sep
compat-drikpanchangComparison profileTue 30 Sep
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 29thCoveredMadhyāhna 30thCoveredRuled
Los Angeles18:18 → 19:4711:1948 min11:190 min29 Sep
Chicago20:18 → 21:4711:1748 min11:160 min29 Sep
Jersey City21:18 → 22:4711:2248 min11:220 min29 Sep
Port of Spain22:18 → 23:4711:3248 min11:320 min29 Sep
London03:18 → 04:4712:2748 min12:260 min29 Sep
Durban04:18 → 05:4711:2348 min11:220 min29 Sep
Dubai06:18 → 07:4711:4548 min11:450 min29 Sep
Delhi07:48 → 09:1711:4748 min11:470 min29 Sep
Kolkata07:48 → 09:1711:0348 min11:030 min29 Sep
Singapore09:18 → 10:4711:3148 min11:310 min29 Sep
Sydney12:18 → 13:4711:220 min11:2248 min30 Sep
Suva14:18 → 15:4711:330 min11:3348 min30 Sep
Profile · tradition
pac-rp@2026.1 · smarta
Rule
mahashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa