Ruling · Rādhāṣṭamī · 2004

Wednesday 22 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 21 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 Tuesday 21 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:09  11:57 madhyāhna ends
10:2110:4511:0911:3311:5712:2112:45

0 of 48 minutes covered

Midday of Wednesday 22 September

Taken. Aṣṭamī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:08  11:56 madhyāhna ends
Aṣṭamī ends 10:47:04
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 12:58 on Tue 21 Sep to 10:47 on Wed 22 Sep.

    2004-09-21T04:58:25Z → 2004-09-22T02:47:05Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:09–11:57 on the 21st, 11:08–11:56 on the 22nd.

    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 21st and 0 of 48 on the 22nd.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: unstated → second-day · margin 1273 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 2004: Wednesday 22 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 2004 falls on Wednesday 22 September. Aṣṭamī runs from 12:58 on Tue 21 Sep to 10:47 on Wed 22 Sep, and reaches madhyāhna on neither day.

ahargana.org/daqing/festivals/2004/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 22 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 22 Sep
compat-drikpanchangComparison profileWed 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 21stCoveredMadhyāhna 22ndCoveredRuled
Los Angeles21:58 → 19:4712:2248 min12:210 min21 Sep
Chicago23:58 → 21:4712:1948 min12:190 min21 Sep
Jersey City00:58 → 22:4712:2548 min12:240 min21 Sep
Port of Spain00:58 → 22:4711:3548 min11:350 min21 Sep
London05:58 → 03:4712:2948 min12:290 min21 Sep
Durban06:58 → 04:4711:2548 min11:250 min21 Sep
Dubai08:58 → 06:4711:4848 min11:470 min21 Sep
Delhi10:28 → 08:1711:5048 min11:500 min21 Sep
Kolkata10:28 → 08:1711:0548 min11:050 min21 Sep
Singapore12:58 → 10:4712:3423 min12:330 min21 Sep
Sydney14:58 → 12:4711:250 min11:2448 min22 Sep
Suva16:58 → 14:4711:360 min11:3548 min22 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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