Ruling · Rādhāṣṭamī · 1975

Friday 12 September

Determinatein Lima, under the Rashtriya Panchang method. Clear of every threshold by 389 minutes.

Decide it for

LimaDelhiKolkataSingaporeSydneyJersey City

12°03′ S 77°02′ W · America/Lima · GeoNames 3936456

The two middays

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

Midday of Thursday 11 September

Aṣṭamī is absent from madhyāhna. Not taken.

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

0 of 48 minutes covered

Midday of Friday 12 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 19:11 on Thu 11 Sep to 18:57 on Fri 12 Sep.

    1975-09-12T00:11:04Z → 1975-09-12T23:57:19Z

  2. 02

    Kāla

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

    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 11th and 48 of 48 on the 12th.

    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 23324 s

  5. 05

    Ruling

    Rādhāṣṭamī, Lima, 1975: Friday 12 September.

    confidence: determinate

Say it like this

In Lima, Rādhāṣṭamī 1975 falls on Friday 12 September. Aṣṭamī runs from 19:11 on Thu 11 Sep to 18:57 on Fri 12 Sep and covers all of madhyāhna that midday.

ahargana.org/lima/festivals/1975/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 12 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 12 Sep
compat-drikpanchangComparison profileFri 12 Sep
No institution has a recorded ruling for Lima.

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 12thCoveredMadhyāhna 13thCoveredRuled
Los Angeles17:11 → 16:5712:2548 min12:250 min12 Sep
Chicago19:11 → 18:5712:2348 min12:220 min12 Sep
Jersey City20:11 → 19:5712:2848 min12:280 min12 Sep
Port of Spain20:11 → 19:5711:3848 min11:380 min12 Sep
London01:11 → 00:5712:3248 min12:320 min12 Sep
Durban02:11 → 01:5711:2948 min11:280 min12 Sep
Dubai04:11 → 03:5711:5148 min11:510 min12 Sep
Delhi05:41 → 05:2711:5348 min11:530 min12 Sep
Kolkata05:41 → 05:2711:0948 min11:090 min12 Sep
Singapore07:41 → 07:2712:0748 min12:070 min12 Sep
Sydney10:11 → 09:5711:2848 min11:280 min12 Sep
Suva12:11 → 11:5711:3916 min11:3919 min13 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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