Ruling · Rādhāṣṭamī · 1989

Friday 8 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 288 minutes.

Decide it for

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 8 September

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 12:13  13:01 madhyāhna ends
11:2511:4912:1312:3713:0113:2513:49

48 of 48 minutes covered

Midday of Saturday 9 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 12:13  13:01 madhyāhna ends
11:2511:4912:1312:3713:0113:2513:49

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 06:04 on Fri 8 Sep to 07:25 on Sat 9 Sep.

    1989-09-07T21:04:25Z → 1989-09-08T22:24:34Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:13–13:01 on the 8th, 12:13–13:01 on the 9th.

    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 8th and 0 of 48 on the 9th.

    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 17306 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 1989: Friday 8 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 1989 falls on Friday 8 September. Aṣṭamī runs from 06:04 on Fri 8 Sep to 07:25 on Sat 9 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1989/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 8 Sep
Ahargaṇa, classicalDisc centre, no refractionFri 8 Sep
compat-drikpanchangComparison profileFri 8 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 7thCoveredMadhyāhna 8thCoveredRuled
Los Angeles14:04 → 15:2512:270 min12:2648 min8 Sep
Chicago16:04 → 17:2512:240 min12:2448 min8 Sep
Jersey City17:04 → 18:2512:300 min12:3048 min8 Sep
Port of Spain17:04 → 18:2511:400 min11:4048 min8 Sep
London22:04 → 23:2512:340 min12:3448 min8 Sep
Durban23:04 → 00:2511:300 min11:3048 min8 Sep
Dubai01:04 → 02:2511:530 min11:5248 min8 Sep
Delhi02:34 → 03:5511:550 min11:5548 min8 Sep
Kolkata02:34 → 03:5511:100 min11:1048 min8 Sep
Singapore05:04 → 06:2512:390 min12:3848 min8 Sep
Sydney07:04 → 08:2511:300 min11:2948 min8 Sep
Suva09:04 → 10:2511:410 min11:4048 min8 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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