Ruling · Rādhāṣṭamī · 1924

Saturday 6 September

Determinatein Luanda, under the Rashtriya Panchang method. Clear of every threshold by 488 minutes.

Decide it for

LuandaDelhiKolkataSingaporeSydneyJersey City

8°50′ S 13°14′ E · Africa/Luanda · GeoNames 2240449

The two middays

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

Midday of Friday 5 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:42  12:30 madhyāhna ends
10:5411:1811:4212:0612:3012:5413:18

0 of 48 minutes covered

Midday of Saturday 6 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:41  12:29 madhyāhna ends
10:5311:1711:4112:0512:2912:5313:17

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 22:53 on Fri 5 Sep to 20:38 on Sat 6 Sep.

    1924-09-05T21:52:43Z → 1924-09-06T19:37:38Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:42–12:30 on the 5th, 11:41–12:29 on the 6th.

    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 5th and 48 of 48 on the 6th.

    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 29290 s

  5. 05

    Ruling

    Rādhāṣṭamī, Luanda, 1924: Saturday 6 September.

    confidence: determinate

Say it like this

In Luanda, Rādhāṣṭamī 1924 falls on Saturday 6 September. Aṣṭamī runs from 22:53 on Fri 5 Sep to 20:38 on Sat 6 Sep and covers all of madhyāhna that midday.

ahargana.org/luanda/festivals/1924/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 6 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 6 Sep
compat-drikpanchangComparison profileSat 6 Sep
No institution has a recorded ruling for Luanda.

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 5thCoveredMadhyāhna 6thCoveredRuled
Los Angeles13:53 → 11:3811:270 min11:2711 min6 Sep
Chicago16:53 → 14:3812:250 min12:2448 min6 Sep
Jersey City17:53 → 15:3812:310 min12:3048 min6 Sep
Port of Spain17:53 → 15:3811:410 min11:4048 min6 Sep
London22:53 → 20:3812:350 min12:3448 min6 Sep
Durban23:53 → 21:3811:310 min11:3048 min6 Sep
Dubai01:53 → 23:3811:530 min11:5348 min6 Sep
Delhi03:23 → 01:0811:560 min11:5548 min6 Sep
Kolkata03:23 → 01:0811:110 min11:1148 min6 Sep
Singapore04:53 → 02:3811:390 min11:3948 min6 Sep
Sydney07:53 → 05:3811:300 min11:3048 min6 Sep
Suva09:53 → 07:3811:410 min11:4148 min6 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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