Ruling · Dattātreyotpatti (Datta Jayanti) · 2069

Friday 27 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 301 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 Friday 27 December

Taken. The only evening Pūrṇimā reaches.

17:03 sunsetpradoṣa ends 18:59
16:3917:0317:2717:5118:1518:3919:0319:27

116 of 116 minutes covered

Evening of Saturday 28 December

Pūrṇimā is absent from pradoṣa. Not taken.

17:04 sunsetpradoṣa ends 19:00
16:4017:0417:2817:5218:1618:4019:0419:28

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 12:02 on Fri 27 Dec to 08:51 on Sat 28 Dec.

    2069-12-27T04:02:17Z → 2069-12-28T00:50:58Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:03–18:59 on the 27th, 17:04–19:00 on the 28th.

    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 27th and 0 of 116 on the 28th.

    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 18037 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2069: Friday 27 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2069 falls on Friday 27 December. Pūrṇimā runs from 12:02 on Fri 27 Dec to 08:51 on Sat 28 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2069/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 27 Dec
Ahargaṇa, classicalDisc centre, no refractionFri 27 Dec
compat-drikpanchangComparison profileFri 27 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 27thCoveredSunset 28thCoveredRuled
Los Angeles20:02 → 16:5116:510 min16:520 min26 Dec
Chicago22:02 → 18:5116:27119 min16:270 min27 Dec
Jersey City23:02 → 19:5116:36118 min16:370 min27 Dec
Port of Spain00:02 → 20:5117:53100 min17:530 min27 Dec
London04:02 → 00:5115:57129 min15:580 min27 Dec
Durban06:02 → 02:5118:5980 min18:590 min27 Dec
Dubai08:02 → 04:5117:38107 min17:380 min27 Dec
Delhi09:32 → 06:2117:32109 min17:330 min27 Dec
Kolkata09:32 → 06:2117:00106 min17:010 min27 Dec
Singapore12:02 → 08:5119:0796 min19:080 min27 Dec
Sydney15:02 → 11:5120:0877 min20:080 min27 Dec
Suva16:02 → 12:5118:4486 min18:440 min27 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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