Ruling · Dattātreyotpatti (Datta Jayanti) · 2019

Wednesday 11 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 207 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 Wednesday 11 December

Taken. The only evening Pūrṇimā reaches.

16:56 sunsetpradoṣa ends 18:52
16:3216:5617:2017:4418:0818:3218:5619:20

116 of 116 minutes covered

Evening of Thursday 12 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:56 sunsetpradoṣa ends 18:52
16:3216:5617:2017:4418:0818:3218:5619:20

0 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 13:29 on Wed 11 Dec to 13:12 on Thu 12 Dec.

    2019-12-11T05:29:14Z → 2019-12-12T05:12:16Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:52 on the 11th, 16:56–18:52 on the 12th.

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

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 116 of 116 minutes on the 11th and 0 of 116 on the 12th.

    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 12396 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2019: Wednesday 11 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2019 falls on Wednesday 11 December. Pūrṇimā runs from 13:29 on Wed 11 Dec to 13:12 on Thu 12 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2019/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 11 Dec
Ahargaṇa, classicalDisc centre, no refractionWed 11 Dec
compat-drikpanchangComparison profileWed 11 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 11thCoveredSunset 12thCoveredRuled
Los Angeles21:29 → 21:1216:44113 min16:440 min11 Dec
Chicago23:29 → 23:1216:19119 min16:190 min11 Dec
Jersey City00:29 → 00:1216:29118 min16:290 min11 Dec
Port of Spain01:29 → 01:1217:44100 min17:450 min11 Dec
London05:29 → 05:1215:51129 min15:510 min11 Dec
Durban07:29 → 07:1218:5080 min18:500 min11 Dec
Dubai09:29 → 09:1217:30107 min17:300 min11 Dec
Delhi10:59 → 10:4217:25109 min17:250 min11 Dec
Kolkata10:59 → 10:4216:53106 min16:530 min11 Dec
Singapore13:29 → 13:1218:5996 min18:590 min11 Dec
Sydney16:29 → 16:1219:5977 min19:590 min11 Dec
Suva18:29 → 18:1219:3587 min19:350 min11 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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