Ruling · Dattātreyotpatti (Datta Jayanti) · 2072

Saturday 24 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 26 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 24 December

Taken. The only evening Pūrṇimā reaches.

17:01 sunsetpradoṣa ends 18:58
16:3717:0117:2517:4918:1318:3719:0119:25

117 of 117 minutes covered

Evening of Sunday 25 December

Pūrṇimā is absent from pradoṣa. Not taken.

17:02 sunsetpradoṣa ends 18:58
16:3817:0217:2617:5018:1418:3819:0219:26

0 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 16:36 on Sat 24 Dec to 15:16 on Sun 25 Dec.

    2072-12-24T08:35:33Z → 2072-12-25T07:16:10Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:01–18:58 on the 24th, 17:02–18:58 on the 25th.

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

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 117 of 117 minutes on the 24th and 0 of 117 on the 25th.

    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 1537 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2072: Saturday 24 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2072 falls on Saturday 24 December. Pūrṇimā runs from 16:36 on Sat 24 Dec to 15:16 on Sun 25 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2072/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 24 Dec
Ahargaṇa, classicalDisc centre, no refractionSat 24 Dec
compat-drikpanchangComparison profileSat 24 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 24thCoveredSunset 25thCoveredRuled
Los Angeles00:36 → 23:1616:50113 min16:500 min24 Dec
Chicago02:36 → 01:1616:25119 min16:250 min24 Dec
Jersey City03:36 → 02:1616:34118 min16:350 min24 Dec
Port of Spain04:36 → 03:1617:51100 min17:520 min24 Dec
London08:36 → 07:1615:55129 min15:560 min24 Dec
Durban10:36 → 09:1618:5880 min18:580 min24 Dec
Dubai12:36 → 11:1617:36107 min17:370 min24 Dec
Delhi14:06 → 12:4617:30110 min17:310 min24 Dec
Kolkata14:06 → 12:4616:59106 min16:590 min24 Dec
Singapore16:36 → 15:1619:0696 min19:060 min24 Dec
Sydney19:36 → 18:1620:0777 min20:070 min24 Dec
Suva20:36 → 19:1618:420 min18:4333 min25 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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