Ruling · Dattātreyotpatti (Datta Jayanti) · 1968

Wednesday 4 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 586 minutes.

Decide it for

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 3 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:56 sunsetpradoṣa ends 18:51
16:3216:5617:2017:4418:0818:3218:5619:20

0 of 115 minutes covered

Evening of Wednesday 4 December

Taken. The only evening Pūrṇimā reaches.

16:56 sunsetpradoṣa ends 18:51
16:3216:5617:2017:4418:0818:3218:5619:20

115 of 115 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 04:37 on Wed 4 Dec to 07:07 on Thu 5 Dec.

    1968-12-03T20:37:11Z → 1968-12-04T23:07:16Z

  2. 02

    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′

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 0 of 115 minutes on the 3rd and 115 of 115 on the 4th.

    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 35153 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1968: Wednesday 4 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1968 falls on Wednesday 4 December. Pūrṇimā runs from 04:37 on Wed 4 Dec to 07:07 on Thu 5 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1968/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 4 Dec
Ahargaṇa, classicalDisc centre, no refractionWed 4 Dec
compat-drikpanchangComparison profileWed 4 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 3rdCoveredSunset 4thCoveredRuled
Los Angeles12:37 → 15:0716:43112 min16:430 min3 Dec
Chicago14:37 → 17:0716:20118 min16:2048 min3 Dec
Jersey City15:37 → 18:0716:29117 min16:2999 min3 Dec
Port of Spain16:37 → 19:0717:42100 min17:4285 min3 Dec
London21:37 → 00:0716:530 min16:53128 min4 Dec
Durban22:37 → 01:0718:440 min18:4580 min4 Dec
Dubai00:37 → 03:0717:290 min17:29107 min4 Dec
Delhi02:07 → 04:3717:240 min17:24109 min4 Dec
Kolkata02:07 → 04:3716:510 min16:51106 min4 Dec
Singapore04:07 → 06:3718:260 min18:2696 min4 Dec
Sydney06:37 → 09:0718:530 min18:5378 min4 Dec
Suva08:37 → 11:0718:300 min18:3187 min4 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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