Ruling · Gopāṣṭamī · 1913

Thursday 6 November

Boundaryin Chattogram, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.

Decide it for

22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733

The two middays

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

Midday of Wednesday 5 November

Qualifies with 15 of 48 minutes. Not taken.

madhyāhna begins 11:05  11:53 madhyāhna ends
Aṣṭamī begins 11:38:49
10:1710:4111:0511:2911:5312:1712:41

15 of 48 minutes covered, the last 15

Midday of Thursday 6 November

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

madhyāhna begins 11:05  11:53 madhyāhna ends
10:1710:4111:0511:2911:5312:1712:41

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 11:38 on Wed 5 Nov to 13:25 on Thu 6 Nov.

    1913-11-05T05:45:29Z → 1913-11-06T07:32:17Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:05–11:53 on the 5th, 11:05–11:53 on the 6th.

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

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 15 of 48 minutes on the 5th and 48 of 48 on the 6th.

    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 884 s

  5. 05

    Ruling

    Gopāṣṭamī, Chattogram, 1913: Thursday 6 November.

    confidence: boundary (tie-break-unstated)

Say it like this

In Chattogram, Gopāṣṭamī 1913 falls on Thursday 6 November. Aṣṭamī runs from 11:38 on Wed 5 Nov to 13:25 on Thu 6 Nov and covers all of madhyāhna that midday. It also reaches the previous midday for 15 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/chattogram/festivals/1913/gopashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 6 Nov
Ahargaṇa, classicalDisc centre, no refractionThu 6 Nov
compat-drikpanchangComparison profileThu 6 Nov
No institution has a recorded ruling for Chattogram.

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 5thCoveredMadhyāhna 6thCoveredRuled
Los Angeles21:45 → 23:3211:1248 min11:130 min5 Nov
Chicago23:45 → 01:3211:1048 min11:100 min5 Nov
Jersey City00:45 → 02:3211:1648 min11:160 min5 Nov
Port of Spain01:45 → 03:3211:2648 min11:260 min5 Nov
London05:45 → 07:3211:2048 min11:200 min5 Nov
Durban07:45 → 09:3211:1648 min11:160 min5 Nov
Dubai09:26 → 11:1311:1948 min11:190 min5 Nov
Delhi11:15 → 13:0211:4148 min11:4148 min5 Nov
Kolkata11:15 → 13:0210:5629 min10:5648 min6 Nov
Singapore12:45 → 14:3211:240 min11:2448 min6 Nov
Sydney15:45 → 17:3211:150 min11:1548 min6 Nov
Suva17:40 → 19:2711:210 min11:2148 min6 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