Ruling · Dattātreyotpatti (Datta Jayanti) · 2050

Tuesday 27 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 188 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 Tuesday 27 December

Taken. The only evening Pūrṇimā reaches.

17:03 sunsetpradoṣa ends 18:59
16:3917:0317:2717:5118:1518:3919:0319:27

116 of 116 minutes covered

Evening of Wednesday 28 December

Pūrṇimā is absent from pradoṣa. Not taken.

17:03 sunsetpradoṣa ends 19:00
16:3917:0317:2717:5118:1518:3919:0319:27

0 of 116 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 13:54 on Tue 27 Dec to 13:16 on Wed 28 Dec.

    2050-12-27T05:54:24Z → 2050-12-28T05:15:39Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:03–18:59 on the 27th, 17:03–19:00 on the 28th.

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

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 116 of 116 minutes on the 27th and 0 of 116 on the 28th.

    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 11291 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2050: Tuesday 27 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2050 falls on Tuesday 27 December. Pūrṇimā runs from 13:54 on Tue 27 Dec to 13:16 on Wed 28 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2050/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 27 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 27 Dec
compat-drikpanchangComparison profileTue 27 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 27thCoveredSunset 28thCoveredRuled
Los Angeles21:54 → 21:1616:51113 min16:520 min27 Dec
Chicago23:54 → 23:1616:26119 min16:270 min27 Dec
Jersey City00:54 → 00:1616:35118 min16:360 min27 Dec
Port of Spain01:54 → 01:1617:52100 min17:530 min27 Dec
London05:54 → 05:1615:57129 min15:580 min27 Dec
Durban07:54 → 07:1618:5880 min18:590 min27 Dec
Dubai09:54 → 09:1617:37107 min17:380 min27 Dec
Delhi11:24 → 10:4617:32109 min17:320 min27 Dec
Kolkata11:24 → 10:4617:00106 min17:010 min27 Dec
Singapore13:54 → 13:1619:0796 min19:070 min27 Dec
Sydney16:54 → 16:1620:0877 min20:080 min27 Dec
Suva17:54 → 17:1618:4386 min18:440 min27 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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