Ruling · Rādhāṣṭamī · 1910

Monday 12 September

Determinatein Puning, under the Rashtriya Panchang method. Clear of every threshold by 145 minutes.

Decide it for

PuningDelhiKolkataSingaporeSydneyJersey City

23°19′ N 116°10′ E · Asia/Shanghai · GeoNames 1802940

The two middays

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

Midday of Sunday 11 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

0 of 48 minutes covered

Midday of Monday 12 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:48  12:36 madhyāhna ends
11:0011:2411:4812:1212:3613:0013:24

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 15:01 on Sun 11 Sep to 17:12 on Mon 12 Sep.

    1910-09-11T07:01:06Z → 1910-09-12T09:12:18Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:48–12:36 on the 11th, 11:48–12:36 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 8699 s

  5. 05

    Ruling

    Rādhāṣṭamī, Puning, 1910: Monday 12 September.

    confidence: determinate

Say it like this

In Puning, Rādhāṣṭamī 1910 falls on Monday 12 September. Aṣṭamī runs from 15:01 on Sun 11 Sep to 17:12 on Mon 12 Sep and covers all of madhyāhna that midday.

ahargana.org/puning/festivals/1910/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 12 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 12 Sep
compat-drikpanchangComparison profileMon 12 Sep
No institution has a recorded ruling for Puning.

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 11thCoveredMadhyāhna 12thCoveredRuled
Los Angeles23:01 → 01:1211:2548 min11:250 min11 Sep
Chicago01:01 → 03:1211:2348 min11:230 min11 Sep
Jersey City02:01 → 04:1211:2948 min11:280 min11 Sep
Port of Spain03:01 → 05:1211:3948 min11:380 min11 Sep
London07:01 → 09:1211:3348 min11:320 min11 Sep
Durban09:01 → 11:1211:2948 min11:290 min11 Sep
Dubai10:42 → 12:5311:3248 min11:3248 min11 Sep
Delhi12:31 → 14:4211:5411 min11:5348 min12 Sep
Kolkata12:31 → 14:4211:090 min11:0948 min12 Sep
Singapore14:01 → 16:1211:380 min11:3748 min12 Sep
Sydney17:01 → 19:1211:280 min11:2848 min12 Sep
Suva18:56 → 21:0711:340 min11:3448 min12 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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