Ruling · Gopāṣṭamī · 2052

Wednesday 30 October

Boundaryin Tehran, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. 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 Wednesday 30 October

Taken. Both middays qualify; the rule is silent, and this one is covered longer.

madhyāhna begins 11:24  12:12 madhyāhna ends
10:3611:0011:2411:4812:1212:3613:00

48 of 48 minutes covered

Midday of Thursday 31 October

Qualifies with 21 of 48 minutes. Not taken.

madhyāhna begins 11:24  12:12 madhyāhna ends
Aṣṭamī ends 11:45:08
10:3611:0011:2411:4812:1212:3613:00

21 of 48 minutes covered, the first 21

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

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 10:24 on Wed 30 Oct to 11:45 on Thu 31 Oct.

    2052-10-30T06:53:59Z → 2052-10-31T08:15:09Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:24–12:12 on the 30th, 11:24–12:12 on the 31st.

    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 30th and 21 of 48 on the 31st.

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

  4. 04

    Tie-break

    Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 1284 s

  5. 05

    Ruling

    Gopāṣṭamī, Tehran, 2052: Wednesday 30 October.

    confidence: boundary (tie-break-unstated)

Say it like this

In Tehran, Gopāṣṭamī 2052 falls on Wednesday 30 October. Aṣṭamī runs from 10:24 on Wed 30 Oct to 11:45 on Thu 31 Oct and covers all of madhyāhna that midday. It also reaches the next midday for 21 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/tehran/festivals/2052/gopashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 30 Oct
Ahargaṇa, classicalDisc centre, no refractionWed 30 Oct
compat-drikpanchangComparison profileWed 30 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/gopashtami · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“S 8 Gopastami, Gosthastami.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 30thCoveredMadhyāhna 31stCoveredRuled
Los Angeles23:54 → 01:1512:1248 min12:120 min30 Oct
Chicago01:54 → 03:1512:1048 min12:100 min30 Oct
Jersey City02:54 → 04:1512:1648 min12:160 min30 Oct
Port of Spain02:54 → 04:1511:2648 min11:260 min30 Oct
London06:54 → 08:1511:2048 min11:200 min30 Oct
Durban08:54 → 10:1511:1648 min11:160 min30 Oct
Dubai10:54 → 12:1511:3848 min11:3837 min30 Oct
Delhi12:24 → 13:4511:415 min11:4148 min31 Oct
Kolkata12:24 → 13:4510:560 min10:5648 min31 Oct
Singapore14:54 → 16:1512:240 min12:2448 min31 Oct
Sydney17:54 → 19:1512:150 min12:1548 min31 Oct
Suva18:54 → 20:1511:260 min11:2648 min31 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
gopashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa