Ruling · Rādhāṣṭamī · 1964

Monday 14 September

Determinatein Daegu, under the Rashtriya Panchang method. Clear of every threshold by 262 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 Sunday 13 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

0 of 48 minutes covered

Midday of Monday 14 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:57  12:45 madhyāhna ends
11:0911:3311:5712:2112:4513:0913:33

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 17:07 on Sun 13 Sep to 19:42 on Mon 14 Sep.

    1964-09-13T08:06:57Z → 1964-09-14T10:41:40Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:57–12:45 on the 13th, 11:57–12:45 on the 14th.

    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 13th and 48 of 48 on the 14th.

    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 15700 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daegu, 1964: Monday 14 September.

    confidence: determinate

Say it like this

In Daegu, Rādhāṣṭamī 1964 falls on Monday 14 September. Aṣṭamī runs from 17:07 on Sun 13 Sep to 19:42 on Mon 14 Sep and covers all of madhyāhna that midday.

ahargana.org/daegu/festivals/1964/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 14 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 14 Sep
compat-drikpanchangComparison profileMon 14 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 13thCoveredMadhyāhna 14thCoveredRuled
Los Angeles01:07 → 03:4212:2448 min12:240 min13 Sep
Chicago03:07 → 05:4212:2248 min12:220 min13 Sep
Jersey City04:07 → 06:4212:2848 min12:270 min13 Sep
Port of Spain04:07 → 06:4211:3848 min11:370 min13 Sep
London09:07 → 11:4212:3248 min12:310 min13 Sep
Durban10:07 → 12:4211:2848 min11:2848 min13 Sep
Dubai12:07 → 14:4211:5032 min11:5048 min14 Sep
Delhi13:37 → 16:1211:530 min11:5248 min14 Sep
Kolkata13:37 → 16:1211:080 min11:0848 min14 Sep
Singapore15:37 → 18:1212:070 min12:0648 min14 Sep
Sydney18:07 → 20:4211:270 min11:2748 min14 Sep
Suva20:07 → 22:4211:380 min11:3848 min14 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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