Ruling · Gopāṣṭamī · 2015

Thursday 19 November

Determinatein Tehran, under the Rashtriya Panchang method. Clear of every threshold by 535 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 Wednesday 18 November

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:25  12:13 madhyāhna ends
10:3711:0111:2511:4912:1312:3713:01

0 of 48 minutes covered

Midday of Thursday 19 November

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:25  12:13 madhyāhna ends
10:3711:0111:2511:4912:1312:3713:01

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 22:39 on Wed 18 Nov to 21:09 on Thu 19 Nov.

    2015-11-18T19:09:24Z → 2015-11-19T17:38:50Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:25–12:13 on the 18th, 11:25–12:13 on the 19th.

    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 18th and 48 of 48 on the 19th.

    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: unstated → only-day · margin 32123 s

  5. 05

    Ruling

    Gopāṣṭamī, Tehran, 2015: Thursday 19 November.

    confidence: determinate

Say it like this

In Tehran, Gopāṣṭamī 2015 falls on Thursday 19 November. Aṣṭamī runs from 22:39 on Wed 18 Nov to 21:09 on Thu 19 Nov and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2015/gopashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 19 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 19 Nov
compat-drikpanchangComparison profileThu 19 Nov
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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles11:09 → 09:3911:1448 min11:140 min18 Nov
Chicago13:09 → 11:3911:120 min11:1227 min19 Nov
Jersey City14:09 → 12:3911:170 min11:1748 min19 Nov
Port of Spain15:09 → 13:3911:270 min11:2748 min19 Nov
London19:09 → 17:3911:210 min11:2248 min19 Nov
Durban21:09 → 19:3911:170 min11:1748 min19 Nov
Dubai23:09 → 21:3911:400 min11:4048 min19 Nov
Delhi00:39 → 23:0911:420 min11:4248 min19 Nov
Kolkata00:39 → 23:0910:580 min10:5848 min19 Nov
Singapore03:09 → 01:3912:260 min12:2648 min19 Nov
Sydney06:09 → 04:3912:160 min12:1748 min19 Nov
Suva08:09 → 06:3912:270 min12:2848 min19 Nov
Profile · tradition
pac-rp@2026.1 · smarta
Rule
gopashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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