Midday of Friday 19 September
Qualifies with 26 of 48 minutes. Not taken.
madhyāhna begins 11:34 12:22 madhyāhna ends
Aṣṭamī begins 11:56:00
10:4611:1011:3411:5812:2212:4613:10
26 of 48 minutes covered, the last 26
Ruling · Rādhāṣṭamī · 2053
Boundaryin Tehran, 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 Friday 19 September
Qualifies with 26 of 48 minutes. Not taken.
26 of 48 minutes covered, the last 26
Midday of Saturday 20 September
Taken. Both middays qualify; the rule is silent, and this one is covered longer.
48 of 48 minutes covered
Aṅga
Aṣṭamī runs from 11:56 on Fri 19 Sep to 14:08 on Sat 20 Sep.
2053-09-19T08:26:00Z → 2053-09-20T10:38:18Z
Kāla
Madhyāhna is 1 ghaṭikā either side of midday: 11:34–12:22 on the 19th, 11:33–12:21 on the 20th.
madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
Rule
Aṣṭamī must be present during madhyāhna. It covers 26 of 48 minutes on the 19th and 48 of 48 on the 20th.
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 1333 s
Ruling
Rādhāṣṭamī, Tehran, 2053: Saturday 20 September.
confidence: boundary (tie-break-unstated)
In Tehran, Rādhāṣṭamī 2053 falls on Saturday 20 September. Aṣṭamī runs from 11:56 on Fri 19 Sep to 14:08 on Sat 20 Sep and covers all of madhyāhna that midday. It also reaches the previous midday for 26 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 | Sat 20 Sep |
| Ahargaṇa, classical | Disc centre, no refraction | Sat 20 Sep |
| compat-drikpanchang | Comparison profile | Sat 20 Sep |
| No institution has a recorded ruling for Tehran. | ||
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 19th | Covered | Madhyāhna 20th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 01:26 → 03:38 | 12:22 | 48 min | 12:22 | 0 min | 19 Sep |
| Chicago | 03:26 → 05:38 | 12:20 | 48 min | 12:20 | 0 min | 19 Sep |
| Jersey City | 04:26 → 06:38 | 12:26 | 48 min | 12:25 | 0 min | 19 Sep |
| Port of Spain | 04:26 → 06:38 | 11:36 | 48 min | 11:35 | 0 min | 19 Sep |
| London | 09:26 → 11:38 | 12:30 | 48 min | 12:29 | 0 min | 19 Sep |
| Durban | 10:26 → 12:38 | 11:26 | 48 min | 11:25 | 48 min | 19 Sep |
| Dubai | 12:26 → 14:38 | 11:48 | 10 min | 11:48 | 48 min | 20 Sep |
| Delhi | 13:56 → 16:08 | 11:51 | 0 min | 11:50 | 48 min | 20 Sep |
| Kolkata | 13:56 → 16:08 | 11:06 | 0 min | 11:06 | 48 min | 20 Sep |
| Singapore | 16:26 → 18:38 | 12:34 | 0 min | 12:34 | 48 min | 20 Sep |
| Sydney | 18:26 → 20:38 | 11:25 | 0 min | 11:25 | 48 min | 20 Sep |
| Suva | 20:26 → 22:38 | 11:36 | 0 min | 11:36 | 48 min | 20 Sep |