Ruling · Mahāṣṭamī (Durgāṣṭamī) · 1971

Tuesday 28 September

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 29 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 Monday 27 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:45  12:33 madhyāhna ends
Aṣṭamī begins 13:01:57
10:5711:2111:4512:0912:3312:5713:21

0 of 48 minutes covered

Midday of Tuesday 28 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:45  12:33 madhyāhna ends
10:5711:2111:4512:0912:3312:5713:21

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 13:02 on Mon 27 Sep to 13:22 on Tue 28 Sep.

    1971-09-27T05:01:58Z → 1971-09-28T05:21:41Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:45–12:33 on the 27th, 11:45–12:33 on the 28th.

    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 27th and 48 of 48 on the 28th.

    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 1730 s

  5. 05

    Ruling

    Mahāṣṭamī, Baoding, 1971: Tuesday 28 September.

    confidence: determinate

Say it like this

In Baoding, Mahāṣṭamī (Durga Ashtami) 1971 falls on Tuesday 28 September. Aṣṭamī runs from 13:02 on Mon 27 Sep to 13:22 on Tue 28 Sep and covers all of madhyāhna that midday.

ahargana.org/baoding/festivals/1971/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 28 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 28 Sep
compat-drikpanchangComparison profileTue 28 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 27thCoveredMadhyāhna 28thCoveredRuled
Los Angeles22:02 → 22:2212:2048 min12:190 min27 Sep
Chicago00:02 → 00:2212:1748 min12:170 min27 Sep
Jersey City01:02 → 01:2212:2348 min12:230 min27 Sep
Port of Spain01:02 → 01:2211:3348 min11:330 min27 Sep
London06:02 → 06:2212:2748 min12:270 min27 Sep
Durban07:02 → 07:2211:2348 min11:230 min27 Sep
Dubai09:02 → 09:2211:4648 min11:450 min27 Sep
Delhi10:32 → 10:5211:4848 min11:480 min27 Sep
Kolkata10:32 → 10:5211:0448 min11:030 min27 Sep
Singapore12:32 → 12:5212:0218 min12:0248 min28 Sep
Sydney15:02 → 15:2211:230 min11:2248 min28 Sep
Suva17:02 → 17:2211:340 min11:3348 min28 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

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