Midday of Tuesday 17 September
Qualifies with 35 of 48 minutes. Not taken.
madhyāhna begins 11:58 12:46 madhyāhna ends
Aṣṭamī begins 12:11:56
11:1011:3411:5812:2212:4613:1013:34
35 of 48 minutes covered, the last 35
Ruling · Rādhāṣṭamī · 1912
Boundaryin Phoenix, 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 Tuesday 17 September
Qualifies with 35 of 48 minutes. Not taken.
35 of 48 minutes covered, the last 35
Midday of Wednesday 18 September
Taken. Both middays qualify; the rule is silent, and this one is covered longer.
48 of 48 minutes covered
Aṅga
Aṣṭamī runs from 12:12 on Tue 17 Sep to 13:45 on Wed 18 Sep.
1912-09-17T19:11:57Z → 1912-09-18T20:45:28Z
Kāla
Madhyāhna is 1 ghaṭikā either side of midday: 11:58–12:46 on the 17th, 11:58–12:46 on the 18th.
madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
Rule
Aṣṭamī must be present during madhyāhna. It covers 35 of 48 minutes on the 17th and 48 of 48 on the 18th.
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 809 s
Ruling
Rādhāṣṭamī, Phoenix, 1912: Wednesday 18 September.
confidence: boundary (tie-break-unstated)
In Phoenix, Rādhāṣṭamī 1912 falls on Wednesday 18 September. Aṣṭamī runs from 12:12 on Tue 17 Sep to 13:45 on Wed 18 Sep and covers all of madhyāhna that midday. It also reaches the previous midday for 35 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 | Wed 18 Sep |
| Ahargaṇa, classical | Disc centre, no refraction | Wed 18 Sep |
| compat-drikpanchang | Comparison profile | Wed 18 Sep |
| No institution has a recorded ruling for Phoenix. | ||
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 17th | Covered | Madhyāhna 18th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 11:12 → 12:45 | 11:23 | 48 min | 11:23 | 48 min | 17 Sep |
| Chicago | 13:12 → 14:45 | 11:21 | 0 min | 11:20 | 48 min | 18 Sep |
| Jersey City | 14:12 → 15:45 | 11:26 | 0 min | 11:26 | 48 min | 18 Sep |
| Port of Spain | 15:12 → 16:45 | 11:36 | 0 min | 11:36 | 48 min | 18 Sep |
| London | 19:12 → 20:45 | 11:31 | 0 min | 11:30 | 48 min | 18 Sep |
| Durban | 21:12 → 22:45 | 11:27 | 0 min | 11:26 | 48 min | 18 Sep |
| Dubai | 22:53 → 00:26 | 11:30 | 0 min | 11:30 | 48 min | 18 Sep |
| Delhi | 00:42 → 02:15 | 11:51 | 0 min | 11:51 | 48 min | 18 Sep |
| Kolkata | 00:42 → 02:15 | 11:07 | 0 min | 11:07 | 48 min | 18 Sep |
| Singapore | 02:12 → 03:45 | 11:35 | 0 min | 11:35 | 48 min | 18 Sep |
| Sydney | 05:12 → 06:45 | 11:26 | 0 min | 11:26 | 48 min | 18 Sep |
| Suva | 07:07 → 08:40 | 11:32 | 0 min | 11:32 | 48 min | 18 Sep |