Ruling · Rādhāṣṭamī · 2054

Tuesday 8 September

Determinatein Luanda, under the Rashtriya Panchang method. Clear of every threshold by 31 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 Tuesday 8 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

Midday of Wednesday 9 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:40  12:28 madhyāhna ends
Aṣṭamī ends 11:09:04
10:5211:1611:4012:0412:2812:5213:16

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 10:36 on Tue 8 Sep to 11:09 on Wed 9 Sep.

    2054-09-08T09:36:21Z → 2054-09-09T10:09:05Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:41–12:29 on the 8th, 11:40–12:28 on the 9th.

    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 8th and 0 of 48 on the 9th.

    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 1885 s

  5. 05

    Ruling

    Rādhāṣṭamī, Luanda, 2054: Tuesday 8 September.

    confidence: determinate

Say it like this

In Luanda, Rādhāṣṭamī 2054 falls on Tuesday 8 September. Aṣṭamī runs from 10:36 on Tue 8 Sep to 11:09 on Wed 9 Sep and covers all of madhyāhna that midday.

ahargana.org/luanda/festivals/2054/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 8 Sep
Ahargaṇa, classicalDisc centre, no refractionTue 8 Sep
compat-drikpanchangComparison profileTue 8 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 8thCoveredMadhyāhna 9thCoveredRuled
Los Angeles02:36 → 03:0912:2648 min12:260 min8 Sep
Chicago04:36 → 05:0912:2448 min12:240 min8 Sep
Jersey City05:36 → 06:0912:3048 min12:290 min8 Sep
Port of Spain05:36 → 06:0911:4048 min11:390 min8 Sep
London10:36 → 11:0912:3448 min12:330 min8 Sep
Durban11:36 → 12:0911:3041 min11:2940 min8 Sep
Dubai13:36 → 14:0911:520 min11:5248 min9 Sep
Delhi15:06 → 15:3911:550 min11:5448 min9 Sep
Kolkata15:06 → 15:3911:100 min11:1048 min9 Sep
Singapore17:36 → 18:0912:380 min12:3848 min9 Sep
Sydney19:36 → 20:0911:290 min11:2948 min9 Sep
Suva21:36 → 22:0911:400 min11:4048 min9 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

About Ahargaṇa