Ruling · Rādhāṣṭamī · 1984

Sunday 2 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 258 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 Sunday 2 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:15  12:03 madhyāhna ends
10:2710:5111:1511:3912:0312:2712:51

48 of 48 minutes covered

Midday of Monday 3 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:15  12:03 madhyāhna ends
10:2710:5111:1511:3912:0312:2712:51

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 06:57 on Sun 2 Sep to 06:12 on Mon 3 Sep.

    1984-09-01T22:57:16Z → 1984-09-02T22:11:59Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:15–12:03 on the 2nd, 11:15–12:03 on the 3rd.

    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 2nd and 0 of 48 on the 3rd.

    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 15478 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 1984: Sunday 2 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 1984 falls on Sunday 2 September. Aṣṭamī runs from 06:57 on Sun 2 Sep to 06:12 on Mon 3 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1984/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 2 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 2 Sep
compat-drikpanchangComparison profileSun 2 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 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles15:57 → 15:1212:280 min12:2848 min2 Sep
Chicago17:57 → 17:1212:260 min12:2648 min2 Sep
Jersey City18:57 → 18:1212:320 min12:3148 min2 Sep
Port of Spain18:57 → 18:1211:420 min11:4248 min2 Sep
London23:57 → 23:1212:360 min12:3648 min2 Sep
Durban00:57 → 00:1211:320 min11:3248 min2 Sep
Dubai02:57 → 02:1211:550 min11:5448 min2 Sep
Delhi04:27 → 03:4211:570 min11:5648 min2 Sep
Kolkata04:27 → 03:4211:120 min11:1248 min2 Sep
Singapore06:57 → 06:1212:410 min12:4048 min2 Sep
Sydney08:57 → 08:1211:310 min11:3148 min2 Sep
Suva10:57 → 10:1211:420 min11:4248 min2 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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