Ruling · Rādhāṣṭamī · 1983

Wednesday 14 September

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 459 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 Tuesday 13 September

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 Wednesday 14 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:24  12:12 madhyāhna ends
10:3611:0011:2411:4812:1212:3613:00

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 19:51 on Tue 13 Sep to 21:07 on Wed 14 Sep.

    1983-09-13T13:51:22Z → 1983-09-14T15:06:45Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:25–12:13 on the 13th, 11:24–12:12 on the 14th.

    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 13th and 48 of 48 on the 14th.

    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 27521 s

  5. 05

    Ruling

    Rādhāṣṭamī, Chattogram, 1983: Wednesday 14 September.

    confidence: determinate

Say it like this

In Chattogram, Rādhāṣṭamī 1983 falls on Wednesday 14 September. Aṣṭamī runs from 19:51 on Tue 13 Sep to 21:07 on Wed 14 Sep and covers all of madhyāhna that midday.

ahargana.org/chattogram/festivals/1983/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 14 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 14 Sep
compat-drikpanchangComparison profileWed 14 Sep
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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles06:51 → 08:0712:2548 min12:240 min13 Sep
Chicago08:51 → 10:0712:2248 min12:220 min13 Sep
Jersey City09:51 → 11:0712:2848 min12:280 min13 Sep
Port of Spain09:51 → 11:0711:3848 min11:380 min13 Sep
London14:51 → 16:0712:320 min12:3248 min14 Sep
Durban15:51 → 17:0711:280 min11:2848 min14 Sep
Dubai17:51 → 19:0711:510 min11:5048 min14 Sep
Delhi19:21 → 20:3711:530 min11:5348 min14 Sep
Kolkata19:21 → 20:3711:090 min11:0848 min14 Sep
Singapore21:51 → 23:0712:370 min12:3648 min14 Sep
Sydney23:51 → 01:0711:280 min11:2748 min14 Sep
Suva01:51 → 03:0711:390 min11:3848 min14 Sep
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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