Ruling · Gopāṣṭamī · 2099

Thursday 19 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 Thursday 19 November

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

madhyāhna begins 11:14  12:02 madhyāhna ends
10:2610:5011:1411:3812:0212:2612:50

48 of 48 minutes covered

Midday of Friday 20 November

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:14  12:02 madhyāhna ends
Aṣṭamī ends 12:23:31
10:2610:5011:1411:3812:0212:2612:50

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 10:23 on Thu 19 Nov to 12:24 on Fri 20 Nov.

    2099-11-19T04:23:16Z → 2099-11-20T06:23:31Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:14–12:02 on the 19th, 11:14–12:02 on the 20th.

    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 19th and 48 of 48 on the 20th.

    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 1262 s

  5. 05

    Ruling

    Gopāṣṭamī, Chattogram, 2099: Thursday 19 November.

    confidence: boundary (tie-break-unstated)

Say it like this

In Chattogram, Gopāṣṭamī 2099 falls on Thursday 19 November. Aṣṭamī runs from 10:23 on Thu 19 Nov to 12:24 on Fri 20 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/chattogram/festivals/2099/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 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles20:23 → 22:2411:1548 min11:150 min19 Nov
Chicago22:23 → 00:2411:1248 min11:120 min19 Nov
Jersey City23:23 → 01:2411:1848 min11:180 min19 Nov
Port of Spain00:23 → 02:2411:2848 min11:280 min19 Nov
London04:23 → 06:2411:2248 min11:220 min19 Nov
Durban06:23 → 08:2411:1848 min11:180 min19 Nov
Dubai08:23 → 10:2411:4048 min11:410 min19 Nov
Delhi09:53 → 11:5411:4348 min11:4311 min19 Nov
Kolkata09:53 → 11:5410:5848 min10:5848 min19 Nov
Singapore12:23 → 14:2412:2648 min12:2648 min19 Nov
Sydney15:23 → 17:2412:170 min12:1748 min20 Nov
Suva16:23 → 18:2411:280 min11:2848 min20 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