Ruling · Dattātreyotpatti (Datta Jayanti) · 1914

Wednesday 2 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 318 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 1 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:57 sunsetpradoṣa ends 18:52
16:3316:5717:2117:4518:0918:3318:5719:21

0 of 115 minutes covered

Evening of Wednesday 2 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 00:09 on Wed 2 Dec to 02:20 on Thu 3 Dec.

    1914-12-01T16:09:09Z → 1914-12-02T18:20:13Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:57–18:52 on the 1st, 16:56–18:51 on the 2nd.

    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 1st and 115 of 115 on the 2nd.

    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 19059 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1914: Wednesday 2 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1914 falls on Wednesday 2 December. Pūrṇimā runs from 00:09 on Wed 2 Dec to 02:20 on Thu 3 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1914/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 2 Dec
Ahargaṇa, classicalDisc centre, no refractionWed 2 Dec
compat-drikpanchangComparison profileWed 2 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 1stCoveredSunset 2ndCoveredRuled
Los Angeles08:09 → 10:2016:44112 min16:430 min1 Dec
Chicago10:09 → 12:2016:21117 min16:200 min1 Dec
Jersey City11:09 → 13:2016:30116 min16:290 min1 Dec
Port of Spain12:09 → 14:2017:41100 min17:420 min1 Dec
London16:09 → 18:2015:55113 min15:55127 min2 Dec
Durban18:09 → 20:2018:4281 min18:4381 min1 Dec
Dubai19:50 → 22:0117:090 min17:09107 min2 Dec
Delhi21:39 → 23:5017:240 min17:24109 min2 Dec
Kolkata21:39 → 23:5016:510 min16:51105 min2 Dec
Singapore23:09 → 01:2017:550 min17:5596 min2 Dec
Sydney02:09 → 04:2018:500 min18:5178 min2 Dec
Suva04:04 → 06:1518:240 min18:2487 min2 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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