Ruling · Rādhāṣṭamī · 2012

Sunday 23 September

Determinatein Jiading, under the Rashtriya Panchang method. Clear of every threshold by 156 minutes.

Decide it for

JiadingDelhiKolkataSingaporeSydneyJersey City

31°23′ N 121°15′ E · Asia/Shanghai · GeoNames 1806508

The two middays

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

Midday of Saturday 22 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:23  12:11 madhyāhna ends
10:3510:5911:2311:4712:1112:3512:59

0 of 48 minutes covered

Midday of Sunday 23 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:23  12:11 madhyāhna ends
10:3510:5911:2311:4712:1112:3512:59

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 16:39 on Sat 22 Sep to 14:47 on Sun 23 Sep.

    2012-09-22T08:39:03Z → 2012-09-23T06:46:54Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:23–12:11 on the 22nd, 11:23–12:11 on the 23rd.

    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 22nd and 48 of 48 on the 23rd.

    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 9348 s

  5. 05

    Ruling

    Rādhāṣṭamī, Jiading, 2012: Sunday 23 September.

    confidence: determinate

Say it like this

In Jiading, Rādhāṣṭamī 2012 falls on Sunday 23 September. Aṣṭamī runs from 16:39 on Sat 22 Sep to 14:47 on Sun 23 Sep and covers all of madhyāhna that midday.

ahargana.org/jiading/festivals/2012/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 23 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 23 Sep
compat-drikpanchangComparison profileSun 23 Sep
No institution has a recorded ruling for Jiading.

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 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles01:39 → 23:4712:2148 min12:210 min22 Sep
Chicago03:39 → 01:4712:1948 min12:180 min22 Sep
Jersey City04:39 → 02:4712:2448 min12:240 min22 Sep
Port of Spain04:39 → 02:4711:3548 min11:340 min22 Sep
London09:39 → 07:4712:2948 min12:280 min22 Sep
Durban10:39 → 08:4711:2548 min11:240 min22 Sep
Dubai12:39 → 10:4711:470 min11:470 min23 Sep
Delhi14:09 → 12:1711:490 min11:4928 min23 Sep
Kolkata14:09 → 12:1711:050 min11:0548 min23 Sep
Singapore16:39 → 14:4712:330 min12:3348 min23 Sep
Sydney18:39 → 16:4711:240 min11:2448 min23 Sep
Suva20:39 → 18:4711:350 min11:3548 min23 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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