Evening of Sunday 3 December
Qualifies with 10 of 115 minutes. Not taken.
16:56 sunsetpradoṣa ends 18:51
Pūrṇimā begins 18:41:22
16:3216:5617:2017:4418:0818:3218:5619:20
10 of 115 minutes covered, the last 10
Ruling · Dattātreyotpatti (Datta Jayanti) · 1922
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 Sunday 3 December
Qualifies with 10 of 115 minutes. Not taken.
10 of 115 minutes covered, the last 10
Evening of Monday 4 December
Taken. Both evenings qualify; the rule is silent, and this one is covered longer.
115 of 115 minutes covered
Aṅga
Pūrṇimā runs from 18:41 on Sun 3 Dec to 19:23 on Mon 4 Dec.
1922-12-03T10:41:23Z → 1922-12-04T11:23:18Z
Kāla
Pradoṣa is 2 muhūrtas after sunset: 16:56–18:51 on the 3rd, 16:56–18:51 on the 4th.
pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′
Rule
Pūrṇimā must be present during pradoṣa. It covers 10 of 115 minutes on the 3rd and 115 of 115 on the 4th.
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 601 s
Ruling
Dattātreyotpatti, Baoding, 1922: Monday 4 December.
confidence: boundary (tie-break-unstated)
In Baoding, Dattātreyotpatti (Datta Jayanti) 1922 falls on Monday 4 December. Pūrṇimā runs from 18:41 on Sun 3 Dec to 19:23 on Mon 4 Dec and covers all of pradoṣa that evening. It also reaches the previous evening for 10 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 | Mon 4 Dec |
| Ahargaṇa, classical | Disc centre, no refraction | Mon 4 Dec |
| compat-drikpanchang | Comparison profile | Mon 4 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 3rd | Covered | Sunset 4th | Covered | Ruled |
|---|---|---|---|---|---|---|
| Los Angeles | 02:41 → 03:23 | 16:43 | 112 min | 16:43 | 0 min | 3 Dec |
| Chicago | 04:41 → 05:23 | 16:20 | 118 min | 16:20 | 0 min | 3 Dec |
| Jersey City | 05:41 → 06:23 | 16:29 | 117 min | 16:29 | 0 min | 3 Dec |
| Port of Spain | 06:41 → 07:23 | 17:42 | 100 min | 17:42 | 0 min | 3 Dec |
| London | 10:41 → 11:23 | 15:54 | 127 min | 15:53 | 0 min | 3 Dec |
| Durban | 12:41 → 13:23 | 18:43 | 81 min | 18:44 | 0 min | 3 Dec |
| Dubai | 14:41 → 15:23 | 17:29 | 107 min | 17:29 | 0 min | 3 Dec |
| Delhi | 16:11 → 16:53 | 17:24 | 109 min | 17:24 | 0 min | 3 Dec |
| Kolkata | 16:11 → 16:53 | 16:51 | 105 min | 16:51 | 2 min | 3 Dec |
| Singapore | 17:41 → 18:23 | 17:56 | 96 min | 17:56 | 27 min | 3 Dec |
| Sydney | 20:41 → 21:23 | 18:52 | 0 min | 18:53 | 78 min | 4 Dec |
| Suva | 22:41 → 23:23 | 18:30 | 0 min | 18:31 | 87 min | 4 Dec |