Midday of Thursday 1 September
Qualifies with 17 of 48 minutes. Not taken.
madhyāhna begins 12:03 12:51 madhyāhna ends
Aṣṭamī begins 12:33:45
11:1511:3912:0312:2712:5113:1513:39
17 of 48 minutes covered, the last 17
Ruling · Rādhāṣṭamī · 1938
Boundaryin Datong, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.
One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.
Midday of Thursday 1 September
Qualifies with 17 of 48 minutes. Not taken.
17 of 48 minutes covered, the last 17
Midday of Friday 2 September
Taken. Both middays qualify; the rule is silent, and this one is covered longer.
48 of 48 minutes covered
Aṅga
Aṣṭamī runs from 12:34 on Thu 1 Sep to 14:30 on Fri 2 Sep.
1938-09-01T04:33:45Z → 1938-09-02T06:30:08Z
Kāla
Madhyāhna is 1 ghaṭikā either side of midday: 12:03–12:51 on the 1st, 12:02–12:50 on the 2nd.
madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
Rule
Aṣṭamī must be present during madhyāhna. It covers 17 of 48 minutes on the 1st and 48 of 48 on the 2nd.
Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103
Tie-break
Both middays qualify and the rule marks neither. The one covered longer is ruled, as a boundary.
priority: unstated → greater-coverage · margin 1017 s
Ruling
Rādhāṣṭamī, Datong, 1938: Friday 2 September.
confidence: boundary (tie-break-unstated)
In Datong, Rādhāṣṭamī 1938 falls on Friday 2 September. Aṣṭamī runs from 12:34 on Thu 1 Sep to 14:30 on Fri 2 Sep and covers all of madhyāhna that midday. It also reaches the previous midday for 17 minutes; the rule does not say which to take, and the one covered longer is ruled: treat the date as contested.
| Authority | Kind | Date |
|---|---|---|
| Ahargaṇa, pac-rp | This ruling | Fri 2 Sep |
| Ahargaṇa, classical | Disc centre, no refraction | Fri 2 Sep |
| compat-drikpanchang | Comparison profile | Fri 2 Sep |
| No institution has a recorded ruling for Datong. | ||
Institutional rulings are recorded with a source address, and are never edited to agree.
/rules/radhashtami · ruleset 2026.3-draft
“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.
Twelve places, west to east. Local clock times.
| Place | Aṣṭamī | Madhyāhna 1st | Covered | Madhyāhna 2nd | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 20:34 → 22:30 | 11:29 | 48 min | 11:28 | 0 min | 1 Sep |
| Chicago | 23:34 → 01:30 | 12:26 | 48 min | 12:26 | 0 min | 1 Sep |
| Jersey City | 00:34 → 02:30 | 12:32 | 48 min | 12:32 | 0 min | 1 Sep |
| Port of Spain | 00:34 → 02:30 | 11:42 | 48 min | 11:42 | 0 min | 1 Sep |
| London | 05:34 → 07:30 | 12:36 | 48 min | 12:36 | 0 min | 1 Sep |
| Durban | 06:34 → 08:30 | 11:32 | 48 min | 11:32 | 0 min | 1 Sep |
| Dubai | 08:34 → 10:30 | 11:55 | 48 min | 11:54 | 0 min | 1 Sep |
| Delhi | 10:04 → 12:00 | 11:57 | 48 min | 11:57 | 3 min | 1 Sep |
| Kolkata | 10:04 → 12:00 | 11:13 | 48 min | 11:12 | 48 min | 1 Sep |
| Singapore | 11:54 → 13:50 | 12:01 | 48 min | 12:00 | 48 min | 1 Sep |
| Sydney | 14:34 → 16:30 | 11:32 | 0 min | 11:31 | 48 min | 2 Sep |
| Suva | 16:34 → 18:30 | 11:43 | 0 min | 11:42 | 48 min | 2 Sep |