Ruling · Rādhāṣṭamī · 1982

Thursday 26 August

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 633 minutes.

Decide it for

CairoDelhiKolkataSingaporeSydneyJersey City

30°04′ N 31°15′ E · Africa/Cairo · GeoNames 360630

The two middays

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

Midday of Wednesday 25 August

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:33  13:21 madhyāhna ends
11:4512:0912:3312:5713:2113:4514:09

0 of 48 minutes covered

Midday of Thursday 26 August

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 12:33  13:21 madhyāhna ends
11:4512:0912:3312:5713:2113:4514:09

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 23:54 on Wed 25 Aug to 01:53 on Fri 27 Aug.

    1982-08-25T20:53:43Z → 1982-08-26T22:52:55Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:33–13:21 on the 25th, 12:33–13:21 on the 26th.

    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 25th and 48 of 48 on the 26th.

    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 37968 s

  5. 05

    Ruling

    Rādhāṣṭamī, Cairo, 1982: Thursday 26 August.

    confidence: determinate

Say it like this

In Cairo, Rādhāṣṭamī 1982 falls on Thursday 26 August. Aṣṭamī runs from 23:54 on Wed 25 Aug to 01:53 on Fri 27 Aug and covers all of madhyāhna that midday.

ahargana.org/cairo/festivals/1982/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 26 Aug
Ahargaṇa, classicalDisc centre, no refractionThu 26 Aug
compat-drikpanchangComparison profileThu 26 Aug
No institution has a recorded ruling for Cairo.

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 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles13:54 → 15:5312:310 min12:3048 min26 Aug
Chicago15:54 → 17:5312:280 min12:2848 min26 Aug
Jersey City16:54 → 18:5312:340 min12:3448 min26 Aug
Port of Spain16:54 → 18:5311:440 min11:4448 min26 Aug
London21:54 → 23:5312:380 min12:3848 min26 Aug
Durban22:54 → 00:5311:340 min11:3448 min26 Aug
Dubai00:54 → 02:5311:570 min11:5648 min26 Aug
Delhi02:24 → 04:2311:590 min11:5948 min26 Aug
Kolkata02:24 → 04:2311:150 min11:1448 min26 Aug
Singapore04:54 → 06:5312:430 min12:4348 min26 Aug
Sydney06:54 → 08:5311:340 min11:3348 min26 Aug
Suva08:54 → 10:5311:450 min11:4448 min26 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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