Ruling · Rādhāṣṭamī · 1910

Monday 12 September

Boundaryin Multan, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.

Decide it for

30°12′ N 71°29′ E · Asia/Karachi · GeoNames 1169825

The two middays

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

Midday of Sunday 11 September

Qualifies with 34 of 48 minutes. Not taken.

madhyāhna begins 12:17  13:05 madhyāhna ends
Aṣṭamī begins 12:31:06
11:2911:5312:1712:4113:0513:2913:53

34 of 48 minutes covered, the last 34

Midday of Monday 12 September

Taken. Both middays qualify; the rule is silent, and this one is covered longer.

madhyāhna begins 12:16  13:04 madhyāhna ends
11:2811:5212:1612:4013:0413:2813:52

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 12:31 on Sun 11 Sep to 14:42 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: 12:17–13:05 on the 11th, 12:16–13:04 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 34 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

    Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.

    priority: unstated → greater-coverage · margin 860 s

  5. 05

    Ruling

    Rādhāṣṭamī, Multan, 1910: Monday 12 September.

    confidence: boundary (tie-break-unstated)

Say it like this

In Multan, Rādhāṣṭamī 1910 falls on Monday 12 September. Aṣṭamī runs from 12:31 on Sun 11 Sep to 14:42 on Mon 12 Sep and covers all of madhyāhna that midday. It also reaches the previous midday for 34 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.

ahargana.org/multan/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 Multan.

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

About Ahargaṇa