Ruling · Rādhāṣṭamī · 1997

Wednesday 10 September

Determinatein Daegu, under the Rashtriya Panchang method. Clear of every threshold by 575 minutes.

Decide it for

DaeguDelhiKolkataSingaporeSydneyJersey City

35°52′ N 128°36′ E · Asia/Seoul · GeoNames 1835329

The two middays

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

Midday of Tuesday 9 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:59  12:47 madhyāhna ends
11:1111:3511:5912:2312:4713:1113:35

0 of 48 minutes covered

Midday of Wednesday 10 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:58  12:46 madhyāhna ends
11:1011:3411:5812:2212:4613:1013:34

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 22:30 on Tue 9 Sep to 22:21 on Wed 10 Sep.

    1997-09-09T13:29:43Z → 1997-09-10T13:21:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:59–12:47 on the 9th, 11:58–12:46 on the 10th.

    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 9th and 48 of 48 on the 10th.

    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 34485 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daegu, 1997: Wednesday 10 September.

    confidence: determinate

Say it like this

In Daegu, Rādhāṣṭamī 1997 falls on Wednesday 10 September. Aṣṭamī runs from 22:30 on Tue 9 Sep to 22:21 on Wed 10 Sep and covers all of madhyāhna that midday.

ahargana.org/daegu/festivals/1997/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 10 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 10 Sep
compat-drikpanchangComparison profileWed 10 Sep
No institution has a recorded ruling for Daegu.

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 9thCoveredMadhyāhna 10thCoveredRuled
Los Angeles06:30 → 06:2112:2648 min12:260 min9 Sep
Chicago08:30 → 08:2112:2348 min12:230 min9 Sep
Jersey City09:30 → 09:2112:2948 min12:290 min9 Sep
Port of Spain09:30 → 09:2111:3948 min11:390 min9 Sep
London14:30 → 14:2112:330 min12:3348 min10 Sep
Durban15:30 → 15:2111:290 min11:2948 min10 Sep
Dubai17:30 → 17:2111:520 min11:5248 min10 Sep
Delhi19:00 → 18:5111:540 min11:5448 min10 Sep
Kolkata19:00 → 18:5111:100 min11:0948 min10 Sep
Singapore21:30 → 21:2112:380 min12:3848 min10 Sep
Sydney23:30 → 23:2111:290 min11:2848 min10 Sep
Suva01:30 → 01:2111:400 min11:4048 min10 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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