Ruling · Dattātreyotpatti (Datta Jayanti) · 2058

Sunday 29 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 484 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 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

Evening of Sunday 29 December

Taken. The only evening Pūrṇimā reaches.

17:04 sunsetpradoṣa ends 19:00
16:4017:0417:2817:5218:1618:4019:0419:28

116 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 03:03 on Sun 29 Dec to 04:26 on Mon 30 Dec.

    2058-12-28T19:03:15Z → 2058-12-29T20:25:53Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:03–19:00 on the 28th, 17:04–19:00 on the 29th.

    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 28th and 116 of 116 on the 29th.

    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 29012 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2058: Sunday 29 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2058 falls on Sunday 29 December. Pūrṇimā runs from 03:03 on Sun 29 Dec to 04:26 on Mon 30 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2058/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 29 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 29 Dec
compat-drikpanchangComparison profileSun 29 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 28thCoveredSunset 29thCoveredRuled
Los Angeles11:03 → 12:2616:52113 min16:520 min28 Dec
Chicago13:03 → 14:2616:27119 min16:280 min28 Dec
Jersey City14:03 → 15:2616:36118 min16:370 min28 Dec
Port of Spain15:03 → 16:2617:53100 min17:530 min28 Dec
London19:03 → 20:2615:580 min15:59129 min29 Dec
Durban21:03 → 22:2618:590 min18:5980 min29 Dec
Dubai23:03 → 00:2617:380 min17:39107 min29 Dec
Delhi00:33 → 01:5617:320 min17:33109 min29 Dec
Kolkata00:33 → 01:5617:010 min17:01106 min29 Dec
Singapore03:03 → 04:2619:070 min19:0896 min29 Dec
Sydney06:03 → 07:2620:080 min20:0877 min29 Dec
Suva07:03 → 08:2618:440 min18:4486 min29 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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