Ruling · Dattātreyotpatti (Datta Jayanti) · 2055

Friday 3 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 195 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 Friday 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

Evening of Saturday 4 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

Pūrṇimā presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 12:22 on Fri 3 Dec to 13:41 on Sat 4 Dec.

    2055-12-03T04:21:45Z → 2055-12-04T05:40:32Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:51 on the 3rd, 16:56–18:51 on the 4th.

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

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 115 of 115 minutes on the 3rd and 0 of 115 on the 4th.

    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 11720 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2055: Friday 3 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2055 falls on Friday 3 December. Pūrṇimā runs from 12:22 on Fri 3 Dec to 13:41 on Sat 4 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2055/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 3 Dec
Ahargaṇa, classicalDisc centre, no refractionFri 3 Dec
compat-drikpanchangComparison profileFri 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 3rdCoveredSunset 4thCoveredRuled
Los Angeles20:22 → 21:4116:43112 min16:430 min3 Dec
Chicago22:22 → 23:4116:20118 min16:200 min3 Dec
Jersey City23:22 → 00:4116:29117 min16:290 min3 Dec
Port of Spain00:22 → 01:4117:42100 min17:420 min3 Dec
London04:22 → 05:4115:53127 min15:530 min3 Dec
Durban06:22 → 07:4118:4481 min18:450 min3 Dec
Dubai08:22 → 09:4117:28107 min17:290 min3 Dec
Delhi09:52 → 11:1117:23109 min17:240 min3 Dec
Kolkata09:52 → 11:1116:51105 min16:510 min3 Dec
Singapore12:22 → 13:4118:5696 min18:560 min3 Dec
Sydney15:22 → 16:4119:5278 min19:530 min3 Dec
Suva16:22 → 17:4118:3087 min18:310 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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