Ruling · Rādhāṣṭamī · 2042

Monday 22 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 92 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Monday 22 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:08  11:56 madhyāhna ends
10:2010:4411:0811:3211:5612:2012:44

48 of 48 minutes covered

Midday of Tuesday 23 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:08  11:56 madhyāhna ends
10:2010:4411:0811:3211:5612:2012:44

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 08:54 on Mon 22 Sep to 09:36 on Tue 23 Sep.

    2042-09-22T00:53:32Z → 2042-09-23T01:36:20Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:08–11:56 on the 22nd, 11:08–11:56 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 48 of 48 minutes on the 22nd and 0 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 5504 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 2042: Monday 22 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 2042 falls on Monday 22 September. Aṣṭamī runs from 08:54 on Mon 22 Sep to 09:36 on Tue 23 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2042/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 22 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 22 Sep
compat-drikpanchangComparison profileMon 22 Sep
No institution has a recorded ruling for Daqing.

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 Angeles17:54 → 18:3612:2148 min12:210 min22 Sep
Chicago19:54 → 20:3612:1948 min12:190 min22 Sep
Jersey City20:54 → 21:3612:2548 min12:240 min22 Sep
Port of Spain20:54 → 21:3611:3548 min11:340 min22 Sep
London01:54 → 02:3612:2948 min12:280 min22 Sep
Durban02:54 → 03:3611:2548 min11:250 min22 Sep
Dubai04:54 → 05:3611:4748 min11:470 min22 Sep
Delhi06:24 → 07:0611:5048 min11:490 min22 Sep
Kolkata06:24 → 07:0611:0548 min11:050 min22 Sep
Singapore08:54 → 09:3612:3348 min12:330 min22 Sep
Sydney10:54 → 11:3611:2448 min11:2412 min22 Sep
Suva12:54 → 13:3611:350 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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