Ruling · Rādhāṣṭamī · 1907

Saturday 14 September

Boundaryin Lima, under the Rashtriya Panchang method. A threshold is only 4 min 24 s away. Say “contested”.

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 Saturday 14 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:31  12:19 madhyāhna ends
Aṣṭamī begins 11:27:00
10:4311:0711:3111:5512:1912:4313:07

48 of 48 minutes covered

Midday of Sunday 15 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:31  12:19 madhyāhna ends
10:4311:0711:3111:5512:1912:4313:07

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 11:27 on Sat 14 Sep to 09:31 on Sun 15 Sep.

    1907-09-14T16:35:37Z → 1907-09-15T14:40:22Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:31–12:19 on the 14th, 11:31–12:19 on the 15th.

    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 14th and 0 of 48 on the 15th.

    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 264 s < 300 s

  5. 05

    Ruling

    Rādhāṣṭamī, Lima, 1907: Saturday 14 September.

    confidence: boundary (margin)

Say it like this

In Lima, Rādhāṣṭamī 1907 falls on Saturday 14 September. Aṣṭamī runs from 11:27 on Sat 14 Sep to 09:31 on Sun 15 Sep and covers all of madhyāhna that midday. It is 4 min 24 s from a threshold: treat the date as contested.

ahargana.org/lima/festivals/1907/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 14 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 14 Sep
compat-drikpanchangComparison profileSat 14 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 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles08:36 → 06:4011:2448 min11:240 min14 Sep
Chicago10:36 → 08:4011:2248 min11:220 min14 Sep
Jersey City11:36 → 09:4011:2840 min11:270 min14 Sep
Port of Spain12:36 → 10:4011:380 min11:370 min15 Sep
London16:36 → 14:4011:320 min11:3248 min15 Sep
Durban18:36 → 16:4011:280 min11:2848 min15 Sep
Dubai20:17 → 18:2111:320 min11:3148 min15 Sep
Delhi22:06 → 20:1011:530 min11:5248 min15 Sep
Kolkata22:06 → 20:1011:080 min11:0848 min15 Sep
Singapore23:36 → 21:4011:370 min11:3648 min15 Sep
Sydney02:36 → 00:4011:270 min11:2748 min15 Sep
Suva04:31 → 02:3511:330 min11:3348 min15 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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