Ruling · Gopāṣṭamī · 2064

Saturday 15 November

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 Saturday 15 November

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

madhyāhna begins 11:25  12:13 madhyāhna ends
Aṣṭamī begins 11:08:32
10:3711:0111:2511:4912:1312:3713:01

48 of 48 minutes covered

Midday of Sunday 16 November

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:25  12:13 madhyāhna ends
Aṣṭamī ends 12:31:01
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 11:09 on Sat 15 Nov to 12:31 on Sun 16 Nov.

    2064-11-15T07:38:33Z → 2064-11-16T09:01:02Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:25–12:13 on the 15th, 11:25–12:13 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 48 of 48 on the 16th.

    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 982 s

  5. 05

    Ruling

    Gopāṣṭamī, Tehran, 2064: Saturday 15 November.

    confidence: boundary (tie-break-unstated)

Say it like this

In Tehran, Gopāṣṭamī 2064 falls on Saturday 15 November. Aṣṭamī runs from 11:09 on Sat 15 Nov to 12:31 on Sun 16 Nov and covers all of madhyāhna that midday. It also reaches the next midday for 48 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/2064/gopashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 15 Nov
Ahargaṇa, classicalDisc centre, no refractionSat 15 Nov
compat-drikpanchangComparison profileSun 16 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 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles23:39 → 01:0111:1448 min11:140 min15 Nov
Chicago01:39 → 03:0111:1148 min11:110 min15 Nov
Jersey City02:39 → 04:0111:1748 min11:170 min15 Nov
Port of Spain03:39 → 05:0111:2748 min11:270 min15 Nov
London07:39 → 09:0111:2148 min11:210 min15 Nov
Durban09:39 → 11:0111:1748 min11:170 min15 Nov
Dubai11:39 → 13:0111:3948 min11:4048 min15 Nov
Delhi13:09 → 14:3111:420 min11:4248 min16 Nov
Kolkata13:09 → 14:3110:570 min10:5748 min16 Nov
Singapore15:39 → 17:0112:250 min12:2648 min16 Nov
Sydney18:39 → 20:0112:160 min12:1648 min16 Nov
Suva19:39 → 21:0111:270 min11:2748 min16 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

About Ahargaṇa