Ruling · Rādhāṣṭamī · 2053

Saturday 20 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 269 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 Friday 19 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 Saturday 20 September

Taken. The only midday Aṣṭamī reaches.

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

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 16:26 on Fri 19 Sep to 18:38 on Sat 20 Sep.

    2053-09-19T08:26:00Z → 2053-09-20T10:38:18Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:09–11:57 on the 19th, 11:09–11:57 on the 20th.

    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 19th and 48 of 48 on the 20th.

    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 16116 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 2053: Saturday 20 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 2053 falls on Saturday 20 September. Aṣṭamī runs from 16:26 on Fri 19 Sep to 18:38 on Sat 20 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2053/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 20 Sep
Ahargaṇa, classicalDisc centre, no refractionSat 20 Sep
compat-drikpanchangComparison profileSat 20 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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles01:26 → 03:3812:2248 min12:220 min19 Sep
Chicago03:26 → 05:3812:2048 min12:200 min19 Sep
Jersey City04:26 → 06:3812:2648 min12:250 min19 Sep
Port of Spain04:26 → 06:3811:3648 min11:350 min19 Sep
London09:26 → 11:3812:3048 min12:290 min19 Sep
Durban10:26 → 12:3811:2648 min11:2548 min19 Sep
Dubai12:26 → 14:3811:4810 min11:4848 min20 Sep
Delhi13:56 → 16:0811:510 min11:5048 min20 Sep
Kolkata13:56 → 16:0811:060 min11:0648 min20 Sep
Singapore16:26 → 18:3812:340 min12:3448 min20 Sep
Sydney18:26 → 20:3811:250 min11:2548 min20 Sep
Suva20:26 → 22:3811:360 min11:3648 min20 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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