Ruling · Mahāṣṭamī (Durga Ashtami) · 2067

Saturday 15 October

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 59 minutes.

Decide it for

TehranDelhiKolkataSingaporeSydneyJersey City

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 Saturday 15 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:26  12:14 madhyāhna ends
10:3811:0211:2611:5012:1412:3813:02

48 of 48 minutes covered

Midday of Sunday 16 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:26  12:14 madhyāhna ends
10:3811:0211:2611:5012:1412:3813:02

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 10:27 on Sat 15 Oct to 08:34 on Sun 16 Oct.

    2067-10-15T06:57:05Z → 2067-10-16T05:04:24Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:26–12:14 on the 15th, 11:26–12:14 on the 16th.

    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 15th and 0 of 48 on the 16th.

    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 3534 s

  5. 05

    Ruling

    Mahāṣṭamī, Tehran, 2067: Saturday 15 October.

    confidence: determinate

Say it like this

In Tehran, Mahāṣṭamī (Durga Ashtami) 2067 falls on Saturday 15 October. Aṣṭamī runs from 10:27 on Sat 15 Oct to 08:34 on Sun 16 Oct and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2067/mahashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 15 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 15 Oct
compat-drikpanchangComparison profileSat 15 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles23:57 → 22:0412:1548 min12:140 min15 Oct
Chicago01:57 → 00:0412:1248 min12:120 min15 Oct
Jersey City02:57 → 01:0412:1848 min12:180 min15 Oct
Port of Spain02:57 → 01:0411:2848 min11:280 min15 Oct
London07:57 → 06:0412:2248 min12:220 min15 Oct
Durban08:57 → 07:0411:1848 min11:180 min15 Oct
Dubai10:57 → 09:0411:4148 min11:400 min15 Oct
Delhi12:27 → 10:3411:434 min11:430 min15 Oct
Kolkata12:27 → 10:3410:580 min10:580 min16 Oct
Singapore14:57 → 13:0412:270 min12:2638 min16 Oct
Sydney17:57 → 16:0412:170 min12:1748 min16 Oct
Suva18:57 → 17:0411:280 min11:2848 min16 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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