Ruling · Rādhāṣṭamī · 1942

Friday 18 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 8 min 41 s.

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 Thursday 17 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:10  12:58 madhyāhna ends
11:2211:4612:1012:3412:5813:2213:46

0 of 48 minutes covered

Midday of Friday 18 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 12:10  12:58 madhyāhna ends
Aṣṭamī ends 12:49:19
11:2211:4612:1012:3412:5813:2213:46

39 of 48 minutes covered, the first 39

Aṣṭamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 15:03 on Thu 17 Sep to 12:49 on Fri 18 Sep.

    1942-09-17T06:02:52Z → 1942-09-18T03:49:20Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:10–12:58 on the 17th, 12:10–12:58 on the 18th.

    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 17th and 39 of 48 on the 18th.

    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 521 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 1942: Friday 18 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 1942 falls on Friday 18 September. Aṣṭamī runs from 15:03 on Thu 17 Sep to 12:49 on Fri 18 Sep and covers 39 of 48 minutes of madhyāhna that midday.

ahargana.org/daqing/festivals/1942/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 18 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 18 Sep
compat-drikpanchangComparison profileFri 18 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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles23:03 → 20:4912:2348 min12:230 min17 Sep
Chicago01:03 → 22:4912:2148 min12:200 min17 Sep
Jersey City02:03 → 23:4912:2748 min12:260 min17 Sep
Port of Spain03:03 → 00:4912:3748 min12:360 min17 Sep
London07:03 → 04:4912:3148 min12:300 min17 Sep
Durban08:03 → 05:4911:2748 min11:260 min17 Sep
Dubai10:03 → 07:4911:4948 min11:490 min17 Sep
Delhi12:33 → 10:1912:5248 min12:510 min17 Sep
Kolkata12:33 → 10:1912:0722 min12:070 min17 Sep
Singapore15:03 → 12:4913:350 min13:350 min18 Sep
Sydney16:03 → 13:4911:260 min11:2648 min18 Sep
Suva18:03 → 15:4911:370 min11:3748 min18 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

About Ahargaṇa