Ruling · Rādhāṣṭamī · 2075

Wednesday 18 September

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 26 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 Tuesday 17 September

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:10  11:58 madhyāhna ends
Aṣṭamī begins 12:24:32
10:2210:4611:1011:3411:5812:2212:46

0 of 48 minutes covered

Midday of Wednesday 18 September

Taken. Aṣṭamī reaches neither midday; the rule takes the second day.

madhyāhna begins 11:10  11:58 madhyāhna ends
Aṣṭamī ends 10:25:26
10:2210:4611:1011:3411:5812:2212:46

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 12:25 on Tue 17 Sep to 10:25 on Wed 18 Sep.

    2075-09-17T04:24:32Z → 2075-09-18T02:25:27Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:10–11:58 on the 17th, 11:10–11:58 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 0 of 48 on the 18th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: unstated → second-day · margin 1570 s

  5. 05

    Ruling

    Rādhāṣṭamī, Daqing, 2075: Wednesday 18 September.

    confidence: determinate

Say it like this

In Daqing, Rādhāṣṭamī 2075 falls on Wednesday 18 September. Aṣṭamī runs from 12:25 on Tue 17 Sep to 10:25 on Wed 18 Sep, and reaches madhyāhna on neither day.

ahargana.org/daqing/festivals/2075/radhashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 18 Sep
Ahargaṇa, classicalDisc centre, no refractionWed 18 Sep
compat-drikpanchangComparison profileTue 17 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 Angeles21:25 → 19:2512:2348 min12:230 min17 Sep
Chicago23:25 → 21:2512:2148 min12:200 min17 Sep
Jersey City00:25 → 22:2512:2748 min12:260 min17 Sep
Port of Spain00:25 → 22:2511:3748 min11:360 min17 Sep
London05:25 → 03:2512:3148 min12:300 min17 Sep
Durban06:25 → 04:2511:2748 min11:260 min17 Sep
Dubai08:25 → 06:2511:4948 min11:490 min17 Sep
Delhi09:55 → 07:5511:5248 min11:510 min17 Sep
Kolkata09:55 → 07:5511:0748 min11:070 min17 Sep
Singapore12:25 → 10:2512:3548 min12:350 min17 Sep
Sydney14:25 → 12:2511:260 min11:2648 min18 Sep
Suva16:25 → 14:2511:370 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

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