Ruling · Mahāṣṭamī (Durga Ashtami) · 2003

Thursday 2 October

Boundaryin Tehran, under the Rashtriya Panchang method. A threshold is only 1 min 30 s away. Say “contested”.

Decide it for

35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two middays

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

Midday of Thursday 2 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:30  12:18 madhyāhna ends
Aṣṭamī begins 11:31:03
10:4211:0611:3011:5412:1812:4213:06

47 of 48 minutes covered, the last 47

Midday of Friday 3 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:29  12:17 madhyāhna ends
10:4111:0511:2911:5312:1712:4113:05

0 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 11:31 on Thu 2 Oct to 09:54 on Fri 3 Oct.

    2003-10-02T08:01:03Z → 2003-10-03T06:23:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:30–12:18 on the 2nd, 11:29–12:17 on the 3rd.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 47 of 48 minutes on the 2nd and 0 of 48 on the 3rd.

    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 90 s < 300 s

  5. 05

    Ruling

    Mahāṣṭamī, Tehran, 2003: Thursday 2 October.

    confidence: boundary (margin)

Say it like this

In Tehran, Mahāṣṭamī (Durga Ashtami) 2003 falls on Thursday 2 October. Aṣṭamī runs from 11:31 on Thu 2 Oct to 09:54 on Fri 3 Oct and covers 47 of 48 minutes of madhyāhna that midday. It is 1 min 30 s from a threshold: treat the date as contested.

ahargana.org/tehran/festivals/2003/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 2 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 2 Oct
compat-drikpanchangComparison profileThu 2 Oct
No institution has a recorded ruling for Tehran.

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 2ndCoveredMadhyāhna 3rdCoveredRuled
Los Angeles01:01 → 23:2412:1848 min12:180 min2 Oct
Chicago03:01 → 01:2412:1648 min12:150 min2 Oct
Jersey City04:01 → 02:2412:2148 min12:210 min2 Oct
Port of Spain04:01 → 02:2411:3148 min11:310 min2 Oct
London09:01 → 07:2412:2648 min12:250 min2 Oct
Durban10:01 → 08:2411:2248 min11:210 min2 Oct
Dubai12:01 → 10:2411:4431 min11:440 min2 Oct
Delhi13:31 → 11:5411:460 min11:468 min3 Oct
Kolkata13:31 → 11:5411:020 min11:0248 min3 Oct
Singapore16:01 → 14:2412:300 min12:3048 min3 Oct
Sydney18:01 → 16:2411:210 min11:2148 min3 Oct
Suva20:01 → 18:2411:320 min11:3248 min3 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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