Ruling · Rādhāṣṭamī · 2038

Monday 6 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 539 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 5 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:14  12:02 madhyāhna ends
10:2610:5011:1411:3812:0212:2612:50

0 of 48 minutes covered

Midday of Monday 6 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:14  12:02 madhyāhna ends
10:2610:5011:1411:3812:0212:2612:50

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 22:47 on Sun 5 Sep to 21:01 on Mon 6 Sep.

    2038-09-05T14:46:45Z → 2038-09-06T13:01:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:14–12:02 on the 5th, 11:14–12:02 on the 6th.

    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 5th and 48 of 48 on the 6th.

    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 32364 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 2038: Monday 6 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 2038 falls on Monday 6 September. Aṣṭamī runs from 22:47 on Sun 5 Sep to 21:01 on Mon 6 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2038/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 6 Sep
Ahargaṇa, classicalDisc centre, no refractionMon 6 Sep
compat-drikpanchangComparison profileMon 6 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 5thCoveredMadhyāhna 6thCoveredRuled
Los Angeles07:47 → 06:0112:2748 min12:270 min5 Sep
Chicago09:47 → 08:0112:2548 min12:250 min5 Sep
Jersey City10:47 → 09:0112:3148 min12:300 min5 Sep
Port of Spain10:47 → 09:0111:4148 min11:400 min5 Sep
London15:47 → 14:0112:350 min12:3448 min6 Sep
Durban16:47 → 15:0111:310 min11:3148 min6 Sep
Dubai18:47 → 17:0111:530 min11:5348 min6 Sep
Delhi20:17 → 18:3111:560 min11:5548 min6 Sep
Kolkata20:17 → 18:3111:110 min11:1148 min6 Sep
Singapore22:47 → 21:0112:390 min12:3948 min6 Sep
Sydney00:47 → 23:0111:300 min11:3048 min6 Sep
Suva02:47 → 01:0111:410 min11:4148 min6 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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