Ruling · Rādhāṣṭamī · 2039

Saturday 27 August

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 235 minutes.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

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 Friday 26 August

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:30  12:18 madhyāhna ends
10:4211:0611:3011:5412:1812:4213:06

0 of 48 minutes covered

Midday of Saturday 27 August

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:30  12:18 madhyāhna ends
10:4211:0611:3011:5412:1812:4213:06

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 18:18 on Fri 26 Aug to 16:14 on Sat 27 Aug.

    2039-08-26T12:17:30Z → 2039-08-27T10:13:31Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:30–12:18 on the 26th, 11:30–12:18 on the 27th.

    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 26th and 48 of 48 on the 27th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 14118 s

  5. 05

    Ruling

    Rādhāṣṭamī, Chattogram, 2039: Saturday 27 August.

    confidence: determinate

Say it like this

In Chattogram, Rādhāṣṭamī 2039 falls on Saturday 27 August. Aṣṭamī runs from 18:18 on Fri 26 Aug to 16:14 on Sat 27 Aug and covers all of madhyāhna that midday.

ahargana.org/chattogram/festivals/2039/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 27 Aug
Ahargaṇa, classicalDisc centre, no refractionSat 27 Aug
compat-drikpanchangComparison profileSat 27 Aug
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/radhashtami · ruleset 2026.3-draft

Month
Bhādrapada, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 103

“S 8 Durvastami (purvaviddha — S 8 of saura Bhadra except Bengal), Mahalaksmi vratarambha, Radhastami (madhyahna vyapini)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles05:18 → 03:1412:3148 min12:300 min26 Aug
Chicago07:18 → 05:1412:2848 min12:280 min26 Aug
Jersey City08:18 → 06:1412:3448 min12:340 min26 Aug
Port of Spain08:18 → 06:1411:4448 min11:440 min26 Aug
London13:18 → 11:1412:388 min12:380 min26 Aug
Durban14:18 → 12:1411:340 min11:3440 min27 Aug
Dubai16:18 → 14:1411:570 min11:5648 min27 Aug
Delhi17:48 → 15:4411:590 min11:5948 min27 Aug
Kolkata17:48 → 15:4411:140 min11:1448 min27 Aug
Singapore20:18 → 18:1412:430 min12:4248 min27 Aug
Sydney22:18 → 20:1411:330 min11:3348 min27 Aug
Suva00:18 → 22:1411:440 min11:4448 min27 Aug
Profile · tradition
pac-rp@2026.1 · smarta
Rule
radhashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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