Ruling · Rādhāṣṭamī · 2001

Saturday 25 August

Determinatein Cairo, under the Rashtriya Panchang method. Clear of every threshold by 92 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 Saturday 25 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

Midday of Sunday 26 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

Aṣṭamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 11:01 on Sat 25 Aug to 11:01 on Sun 26 Aug.

    2001-08-25T08:00:46Z → 2001-08-26T08:00:53Z

  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 48 of 48 minutes on the 25th and 0 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 5502 s

  5. 05

    Ruling

    Rādhāṣṭamī, Cairo, 2001: Saturday 25 August.

    confidence: determinate

Say it like this

In Cairo, Rādhāṣṭamī 2001 falls on Saturday 25 August. Aṣṭamī runs from 11:01 on Sat 25 Aug to 11:01 on Sun 26 Aug and covers all of madhyāhna that midday.

ahargana.org/cairo/festivals/2001/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 25 Aug
Ahargaṇa, classicalDisc centre, no refractionSat 25 Aug
compat-drikpanchangComparison profileSat 25 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 Angeles01:01 → 01:0112:3148 min12:300 min25 Aug
Chicago03:01 → 03:0112:2848 min12:280 min25 Aug
Jersey City04:01 → 04:0112:3448 min12:340 min25 Aug
Port of Spain04:01 → 04:0111:4448 min11:440 min25 Aug
London09:01 → 09:0112:3848 min12:380 min25 Aug
Durban10:01 → 10:0111:3448 min11:340 min25 Aug
Dubai12:01 → 12:0111:5744 min11:564 min25 Aug
Delhi13:31 → 13:3111:590 min11:5948 min26 Aug
Kolkata13:31 → 13:3111:150 min11:1448 min26 Aug
Singapore16:01 → 16:0112:430 min12:4248 min26 Aug
Sydney18:01 → 18:0111:340 min11:3348 min26 Aug
Suva20:01 → 20:0111:450 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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