Ruling · Dattātreyotpatti (Datta Jayanti) · 1962

Tuesday 11 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 31 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 Monday 10 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

Evening of Tuesday 11 December

Taken. The only evening Pūrṇimā reaches.

16:56 sunsetpradoṣa ends 18:52
Pūrṇimā ends 17:27:21
16:3216:5617:2017:4418:0818:3218:5619:20

31 of 116 minutes covered, the first 31

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 19:56 on Mon 10 Dec to 17:27 on Tue 11 Dec.

    1962-12-10T11:56:10Z → 1962-12-11T09:27:22Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:52 on the 10th, 16:56–18:52 on the 11th.

    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 10th and 31 of 116 on the 11th.

    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 1887 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1962: Tuesday 11 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1962 falls on Tuesday 11 December. Pūrṇimā runs from 19:56 on Mon 10 Dec to 17:27 on Tue 11 Dec and covers 31 of 116 minutes of pradoṣa that evening.

ahargana.org/baoding/festivals/1962/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 11 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 11 Dec
compat-drikpanchangComparison profileTue 11 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 10thCoveredSunset 11thCoveredRuled
Los Angeles03:56 → 01:2716:44113 min16:440 min10 Dec
Chicago05:56 → 03:2716:19119 min16:190 min10 Dec
Jersey City06:56 → 04:2716:28118 min16:290 min10 Dec
Port of Spain07:56 → 05:2717:44100 min17:440 min10 Dec
London11:56 → 09:2715:51129 min15:510 min10 Dec
Durban13:56 → 11:2718:4980 min18:500 min10 Dec
Dubai15:56 → 13:2717:30107 min17:300 min10 Dec
Delhi17:26 → 14:5717:24107 min17:250 min10 Dec
Kolkata17:26 → 14:5716:5372 min16:530 min10 Dec
Singapore19:26 → 16:5718:2838 min18:290 min10 Dec
Sydney21:56 → 19:2718:580 min18:5929 min11 Dec
Suva23:56 → 21:2718:340 min18:3587 min11 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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