Evening of Thursday 29 December
Qualifies with 64 of 116 minutes. Not taken.
17:04 sunsetpradoṣa ends 19:00
Pūrṇimā begins 17:56:03
16:4017:0417:2817:5218:1618:4019:0419:28
64 of 116 minutes covered, the last 64
Ruling · Dattātreyotpatti (Dattātreya Jayantī) · 2039
Boundaryin Baoding, under the Rashtriya Panchang method. Both evenings qualify and the rule does not say which to take. Say “contested”.
One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.
Evening of Thursday 29 December
Qualifies with 64 of 116 minutes. Not taken.
64 of 116 minutes covered, the last 64
Evening of Friday 30 December
Taken. Both evenings qualify; the rule is silent, and this one is covered longer.
116 of 116 minutes covered
Aṅga
Pūrṇimā runs from 17:56 on Thu 29 Dec to 20:38 on Fri 30 Dec.
2039-12-29T09:56:03Z → 2039-12-30T12:37:47Z
Kāla
Pradoṣa is 2 muhūrtas after sunset: 17:04–19:00 on the 29th, 17:04–19:01 on the 30th.
pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′
Rule
Pūrṇimā must be present during pradoṣa. It covers 64 of 116 minutes on the 29th and 116 of 116 on the 30th.
Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104
Tie-break
Both evenings qualify and the rule marks neither. The one covered longer is ruled, as a boundary.
priority: unstated → greater-coverage · margin 3140 s
Ruling
Dattātreyotpatti, Baoding, 2039: Friday 30 December.
confidence: boundary (tie-break-unstated)
In Baoding, Dattātreyotpatti (Datta Jayanti) 2039 falls on Friday 30 December. Pūrṇimā runs from 17:56 on Thu 29 Dec to 20:38 on Fri 30 Dec and covers all of pradoṣa that evening. It also reaches the previous evening for 64 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 30 Dec |
| Ahargaṇa, classical | Disc centre, no refraction | Fri 30 Dec |
| compat-drikpanchang | Comparison profile | Fri 30 Dec |
| No institution has a recorded ruling for Baoding. | ||
Institutional rulings are recorded with a source address, and are never edited to agree.
/rules/dattatreyotpatti · ruleset 2026.3-draft
“S 15 Dattatreyotpatti (pradosa).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.
Twelve places, west to east. Local clock times.
| Place | Pūrṇimā | Sunset 29th | Covered | Sunset 30th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 01:56 → 04:38 | 16:52 | 113 min | 16:53 | 0 min | 29 Dec |
| Chicago | 03:56 → 06:38 | 16:27 | 119 min | 16:28 | 0 min | 29 Dec |
| Jersey City | 04:56 → 07:38 | 16:37 | 118 min | 16:37 | 0 min | 29 Dec |
| Port of Spain | 05:56 → 08:38 | 17:53 | 100 min | 17:54 | 0 min | 29 Dec |
| London | 09:56 → 12:38 | 15:58 | 129 min | 15:59 | 0 min | 29 Dec |
| Durban | 11:56 → 14:38 | 18:59 | 80 min | 18:59 | 0 min | 29 Dec |
| Dubai | 13:56 → 16:38 | 17:38 | 107 min | 17:39 | 0 min | 29 Dec |
| Delhi | 15:26 → 18:08 | 17:33 | 109 min | 17:33 | 34 min | 29 Dec |
| Kolkata | 15:26 → 18:08 | 17:01 | 106 min | 17:02 | 66 min | 29 Dec |
| Singapore | 17:56 → 20:38 | 19:08 | 96 min | 19:08 | 90 min | 29 Dec |
| Sydney | 20:56 → 23:38 | 20:08 | 29 min | 20:09 | 77 min | 30 Dec |
| Suva | 21:56 → 00:38 | 18:44 | 0 min | 18:44 | 86 min | 30 Dec |