Ruling · Dattātreyotpatti (Dattātreya Jayantī) · 2004

Sunday 26 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 102 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 Saturday 25 December

Pūrṇimā is absent from pradoṣa. Not taken.

17:01 sunsetpradoṣa ends 18:58
16:3717:0117:2517:4918:1318:3719:0119:25

0 of 117 minutes covered

Evening of Sunday 26 December

Taken. The only evening Pūrṇimā reaches.

17:02 sunsetpradoṣa ends 18:59
16:3817:0217:2617:5018:1418:3819:0219:26

117 of 117 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 20:40 on Sat 25 Dec to 23:06 on Sun 26 Dec.

    2004-12-25T12:40:06Z → 2004-12-26T15:06:20Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:01–18:58 on the 25th, 17:02–18:59 on the 26th.

    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 117 minutes on the 25th and 117 of 117 on the 26th.

    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 6128 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2004: Sunday 26 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2004 falls on Sunday 26 December. Pūrṇimā runs from 20:40 on Sat 25 Dec to 23:06 on Sun 26 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2004/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 26 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 26 Dec
compat-drikpanchangComparison profileSun 26 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 25thCoveredSunset 26thCoveredRuled
Los Angeles04:40 → 07:0616:50113 min16:510 min25 Dec
Chicago06:40 → 09:0616:25119 min16:260 min25 Dec
Jersey City07:40 → 10:0616:34118 min16:350 min25 Dec
Port of Spain08:40 → 11:0617:51100 min17:520 min25 Dec
London12:40 → 15:0615:56129 min15:560 min25 Dec
Durban14:40 → 17:0618:5880 min18:580 min25 Dec
Dubai16:40 → 19:0617:36107 min17:3790 min25 Dec
Delhi18:10 → 20:3617:3170 min17:31110 min26 Dec
Kolkata18:10 → 20:3616:5935 min17:00106 min26 Dec
Singapore20:40 → 23:0619:062 min19:0796 min26 Dec
Sydney23:40 → 02:0620:070 min20:0877 min26 Dec
Suva00:40 → 03:0618:430 min18:4386 min26 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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