Midday of Tuesday 7 September
Qualifies with 30 of 48 minutes. Not taken.
madhyāhna begins 11:11 11:59 madhyāhna ends
Aṣṭamī begins 11:28:34
10:2310:4711:1111:3511:5912:2312:47
30 of 48 minutes covered, the last 30
Ruling · Rādhāṣṭamī · 2027
Boundaryin Kolkata, under the Rashtriya Panchang method. Both middays qualify and the rule does not say which to take. Say “contested”.
Decide it for
22°34′ N 88°22′ E · Asia/Kolkata · GeoNames 1275004
One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.
Midday of Tuesday 7 September
Qualifies with 30 of 48 minutes. Not taken.
30 of 48 minutes covered, the last 30
Midday of Wednesday 8 September
Taken. Both middays qualify; the rule is silent, and this one is covered longer.
48 of 48 minutes covered
Aṅga
Aṣṭamī runs from 11:29 on Tue 7 Sep to 12:45 on Wed 8 Sep.
2027-09-07T05:58:34Z → 2027-09-08T07:14:48Z
Kāla
Madhyāhna is 1 ghaṭikā either side of midday: 11:11–11:59 on the 7th, 11:10–11:58 on the 8th.
madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
Rule
Aṣṭamī must be present during madhyāhna. It covers 30 of 48 minutes on the 7th and 48 of 48 on the 8th.
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 1080 s
Ruling
Rādhāṣṭamī, Kolkata, 2027: Wednesday 8 September.
confidence: boundary (tie-break-unstated)
In Kolkata, Rādhāṣṭamī 2027 falls on Wednesday 8 September. Aṣṭamī runs from 11:29 on Tue 7 Sep to 12:45 on Wed 8 Sep and covers all of madhyāhna that midday. It also reaches the previous midday for 30 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 8 Sep |
| Ahargaṇa, classical | Disc centre, no refraction | Wed 8 Sep |
| compat-drikpanchang | Comparison profile | Wed 8 Sep |
| No institution has a recorded ruling for Kolkata. | ||
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 7th | Covered | Madhyāhna 8th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 22:59 → 00:15 | 12:27 | 48 min | 12:26 | 0 min | 7 Sep |
| Chicago | 00:59 → 02:15 | 12:24 | 48 min | 12:24 | 0 min | 7 Sep |
| Jersey City | 01:59 → 03:15 | 12:30 | 48 min | 12:30 | 0 min | 7 Sep |
| Port of Spain | 01:59 → 03:15 | 11:40 | 48 min | 11:40 | 0 min | 7 Sep |
| London | 06:59 → 08:15 | 12:34 | 48 min | 12:34 | 0 min | 7 Sep |
| Durban | 07:59 → 09:15 | 11:30 | 48 min | 11:30 | 0 min | 7 Sep |
| Dubai | 09:59 → 11:15 | 11:53 | 48 min | 11:52 | 0 min | 7 Sep |
| Delhi | 11:29 → 12:45 | 11:55 | 48 min | 11:55 | 48 min | 7 Sep |
| Kolkata | 11:29 → 12:45 | 11:11 | 30 min | 11:10 | 48 min | 8 Sep |
| Singapore | 13:59 → 15:15 | 12:39 | 0 min | 12:38 | 48 min | 8 Sep |
| Sydney | 15:59 → 17:15 | 11:30 | 0 min | 11:29 | 48 min | 8 Sep |
| Suva | 17:59 → 19:15 | 11:41 | 0 min | 11:40 | 48 min | 8 Sep |