Ruling · Dattātreyotpatti (Datta Jayanti) · 2051

Sunday 17 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 311 minutes.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Saturday 16 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:57 sunsetpradoṣa ends 18:54
16:3316:5717:2117:4518:0918:3318:5719:21

0 of 116 minutes covered

Evening of Sunday 17 December

Taken. The only evening Pūrṇimā reaches.

16:57 sunsetpradoṣa ends 18:54
16:3316:5717:2117:4518:0918:3318:5719:21

117 of 117 minutes covered

Pūrṇimā presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 03:11 on Sun 17 Dec to 00:05 on Mon 18 Dec.

    2051-12-16T19:11:27Z → 2051-12-17T16:05:15Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:57–18:54 on the 16th, 16:57–18:54 on the 17th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 0 of 116 minutes on the 16th and 117 of 117 on the 17th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 18683 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2051: Sunday 17 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2051 falls on Sunday 17 December. Pūrṇimā runs from 03:11 on Sun 17 Dec to 00:05 on Mon 18 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2051/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 17 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 17 Dec
compat-drikpanchangComparison profileSun 17 Dec
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/dattatreyotpatti · ruleset 2026.3-draft

Month
Mārgaśīrṣa, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“S 15 Dattatreyotpatti (pradosa).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāSunset 16thCoveredSunset 17thCoveredRuled
Los Angeles11:11 → 08:0516:45113 min16:460 min16 Dec
Chicago13:11 → 10:0516:20119 min16:210 min16 Dec
Jersey City14:11 → 11:0516:30118 min16:300 min16 Dec
Port of Spain15:11 → 12:0517:47100 min17:470 min16 Dec
London19:11 → 16:0515:510 min15:5214 min17 Dec
Durban21:11 → 18:0518:530 min18:540 min16 Dec
Dubai23:11 → 20:0517:320 min17:32107 min17 Dec
Delhi00:41 → 21:3517:260 min17:27110 min17 Dec
Kolkata00:41 → 21:3516:550 min16:55106 min17 Dec
Singapore03:11 → 00:0519:010 min19:0296 min17 Dec
Sydney06:11 → 03:0520:020 min20:0377 min17 Dec
Suva07:11 → 04:0518:380 min18:3886 min17 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
dattatreyotpatti@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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