Ruling · Dattātreyotpatti (Datta Jayanti) · 1941

Wednesday 3 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 450 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 2 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 3 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 02:21 on Wed 3 Dec to 04:51 on Thu 4 Dec.

    1941-12-02T18:21:12Z → 1941-12-03T20:50:51Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:51 on the 2nd, 16:56–18:51 on the 3rd.

    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 2nd and 115 of 115 on the 3rd.

    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 26989 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1941: Wednesday 3 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1941 falls on Wednesday 3 December. Pūrṇimā runs from 02:21 on Wed 3 Dec to 04:51 on Thu 4 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1941/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 3 Dec
Ahargaṇa, classicalDisc centre, no refractionWed 3 Dec
compat-drikpanchangComparison profileWed 3 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 2ndCoveredSunset 3rdCoveredRuled
Los Angeles10:21 → 12:5116:43112 min16:430 min2 Dec
Chicago12:21 → 14:5116:20117 min16:200 min2 Dec
Jersey City13:21 → 15:5116:29117 min16:290 min2 Dec
Port of Spain14:21 → 16:5117:42100 min17:420 min2 Dec
London19:21 → 21:5116:540 min16:54127 min3 Dec
Durban20:21 → 22:5118:430 min18:4481 min3 Dec
Dubai22:21 → 00:5117:280 min17:29107 min3 Dec
Delhi00:51 → 03:2118:240 min18:24109 min3 Dec
Kolkata00:51 → 03:2117:510 min17:51105 min3 Dec
Singapore01:51 → 04:2118:250 min18:2696 min3 Dec
Sydney04:21 → 06:5118:510 min18:5278 min3 Dec
Suva06:21 → 08:5118:290 min18:3087 min3 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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