Ruling · Dattātreyotpatti (Dattātreya Jayantī) · 2014

Saturday 6 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 95 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 5 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 116 minutes covered

Evening of Saturday 6 December

Taken. The only evening Pūrṇimā reaches.

16:56 sunsetpradoṣa ends 18:51
16:3216:5617:2017:4418:0818:3218:5619:20

116 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 20:49 on Fri 5 Dec to 20:27 on Sat 6 Dec.

    2014-12-05T12:48:35Z → 2014-12-06T12:26:45Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:51 on the 5th, 16:56–18:51 on the 6th.

    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 116 minutes on the 5th and 116 of 116 on the 6th.

    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 5725 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2014: Saturday 6 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2014 falls on Saturday 6 December. Pūrṇimā runs from 20:49 on Fri 5 Dec to 20:27 on Sat 6 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2014/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 6 Dec
Ahargaṇa, classicalDisc centre, no refractionSat 6 Dec
compat-drikpanchangComparison profileSat 6 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 5thCoveredSunset 6thCoveredRuled
Los Angeles04:49 → 04:2716:43112 min16:430 min5 Dec
Chicago06:49 → 06:2716:19118 min16:190 min5 Dec
Jersey City07:49 → 07:2716:29117 min16:280 min5 Dec
Port of Spain08:49 → 08:2717:42100 min17:430 min5 Dec
London12:49 → 12:2715:53128 min15:520 min5 Dec
Durban14:49 → 14:2718:4580 min18:460 min5 Dec
Dubai16:49 → 16:2717:29107 min17:290 min5 Dec
Delhi18:19 → 17:5717:2454 min17:2433 min5 Dec
Kolkata18:19 → 17:5716:5118 min16:5265 min6 Dec
Singapore20:49 → 20:2718:560 min18:5790 min6 Dec
Sydney23:49 → 23:2719:540 min19:5578 min6 Dec
Suva01:49 → 01:2719:310 min19:3287 min6 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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