Ruling · Dattātreyotpatti (Datta Jayanti) · 1946

Sunday 8 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 420 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 7 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 Sunday 8 December

Taken. The only evening Pūrṇimā reaches.

16:56 sunsetpradoṣa ends 18:52
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 05:34 on Sun 8 Dec to 01:52 on Mon 9 Dec.

    1946-12-07T21:33:49Z → 1946-12-08T17:51:58Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:51 on the 7th, 16:56–18:52 on the 8th.

    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 7th and 116 of 116 on the 8th.

    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 25223 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1946: Sunday 8 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1946 falls on Sunday 8 December. Pūrṇimā runs from 05:34 on Sun 8 Dec to 01:52 on Mon 9 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1946/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 8 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 8 Dec
compat-drikpanchangComparison profileSun 8 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 7thCoveredSunset 8thCoveredRuled
Los Angeles13:34 → 09:5216:43112 min16:430 min7 Dec
Chicago15:34 → 11:5216:19118 min16:190 min7 Dec
Jersey City16:34 → 12:5216:28112 min16:280 min7 Dec
Port of Spain17:34 → 13:5217:43100 min17:430 min7 Dec
London21:34 → 17:5215:520 min15:52120 min8 Dec
Durban23:34 → 19:5218:470 min18:4765 min8 Dec
Dubai01:34 → 21:5217:290 min17:29107 min8 Dec
Delhi03:04 → 23:2217:240 min17:24109 min8 Dec
Kolkata03:04 → 23:2216:520 min16:52106 min8 Dec
Singapore05:04 → 01:2218:270 min18:2896 min8 Dec
Sydney07:34 → 03:5218:550 min18:5677 min8 Dec
Suva09:34 → 05:5218:320 min18:3387 min8 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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