Ruling · Dattātreyotpatti (Dattātreya Jayantī) · 2049

Wednesday 8 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 88 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 8 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 9 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 14:41 on Wed 8 Dec to 15:28 on Thu 9 Dec.

    2049-12-08T06:40:46Z → 2049-12-09T07:28:08Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:52 on the 8th, 16:56–18:52 on the 9th.

    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 8th and 0 of 116 on the 9th.

    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 5256 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2049: Wednesday 8 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2049 falls on Wednesday 8 December. Pūrṇimā runs from 14:41 on Wed 8 Dec to 15:28 on Thu 9 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2049/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 8 Dec
Ahargaṇa, classicalDisc centre, no refractionWed 8 Dec
compat-drikpanchangComparison profileWed 8 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 8thCoveredSunset 9thCoveredRuled
Los Angeles22:41 → 23:2816:43113 min16:440 min8 Dec
Chicago00:41 → 01:2816:19118 min16:190 min8 Dec
Jersey City01:41 → 02:2816:28117 min16:280 min8 Dec
Port of Spain02:41 → 03:2817:44100 min17:440 min8 Dec
London06:41 → 07:2815:51128 min15:510 min8 Dec
Durban08:41 → 09:2818:4880 min18:490 min8 Dec
Dubai10:41 → 11:2817:29107 min17:300 min8 Dec
Delhi12:11 → 12:5817:24109 min17:240 min8 Dec
Kolkata12:11 → 12:5816:52106 min16:520 min8 Dec
Singapore14:41 → 15:2818:5896 min18:580 min8 Dec
Sydney17:41 → 18:2819:5777 min19:580 min8 Dec
Suva18:41 → 19:2818:3379 min18:3454 min8 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

About Ahargaṇa