Ruling · Rādhāṣṭamī · 2079

Sunday 3 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 375 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 Sunday 3 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 4 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 02:37 on Sun 3 Sep to 05:00 on Mon 4 Sep.

    2079-09-02T18:36:43Z → 2079-09-03T20:59:57Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:15–12:03 on the 3rd, 11:15–12:03 on the 4th.

    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 3rd and 0 of 48 on the 4th.

    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 22499 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 2079: Sunday 3 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 2079 falls on Sunday 3 September. Aṣṭamī runs from 02:37 on Sun 3 Sep to 05:00 on Mon 4 Sep and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2079/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 3 Sep
Ahargaṇa, classicalDisc centre, no refractionSun 3 Sep
compat-drikpanchangComparison profileSun 3 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 2ndCoveredMadhyāhna 3rdCoveredRuled
Los Angeles11:37 → 14:0012:2948 min12:2848 min2 Sep
Chicago13:37 → 16:0012:260 min12:2648 min3 Sep
Jersey City14:37 → 17:0012:320 min12:3148 min3 Sep
Port of Spain14:37 → 17:0011:420 min11:4248 min3 Sep
London19:37 → 22:0012:360 min12:3648 min3 Sep
Durban20:37 → 23:0011:320 min11:3248 min3 Sep
Dubai22:37 → 01:0011:550 min11:5448 min3 Sep
Delhi00:07 → 02:3011:570 min11:5748 min3 Sep
Kolkata00:07 → 02:3011:120 min11:1248 min3 Sep
Singapore02:37 → 05:0012:410 min12:4048 min3 Sep
Sydney04:37 → 07:0011:310 min11:3148 min3 Sep
Suva06:37 → 09:0011:420 min11:4248 min3 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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