Ruling · Rādhāṣṭamī · 1907

Sunday 15 September

Determinatein Shaoxing, under the Rashtriya Panchang method. Clear of every threshold by 623 minutes.

Decide it for

ShaoxingDelhiKolkataSingaporeSydneyJersey City

30°00′ N 120°35′ E · Asia/Shanghai · GeoNames 1795855

The two middays

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

Midday of Saturday 14 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:29  12:17 madhyāhna ends
10:4111:0511:2911:5312:1712:4113:05

0 of 48 minutes covered

Midday of Sunday 15 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:29  12:17 madhyāhna ends
10:4111:0511:2911:5312:1712:4113:05

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 00:36 on Sun 15 Sep to 22:40 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: 11:29–12:17 on the 14th, 11:29–12:17 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 0 of 48 minutes on the 14th and 48 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 37396 s

  5. 05

    Ruling

    Rādhāṣṭamī, Shaoxing, 1907: Sunday 15 September.

    confidence: determinate

Say it like this

In Shaoxing, Rādhāṣṭamī 1907 falls on Sunday 15 September. Aṣṭamī runs from 00:36 on Sun 15 Sep to 22:40 on Sun 15 Sep and covers all of madhyāhna that midday.

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

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 15 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 15 Sep
compat-drikpanchangComparison profileSun 15 Sep
No institution has a recorded ruling for Shaoxing.

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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