Ruling · Dattātreyotpatti (Datta Jayanti) · 1976

Monday 6 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 307 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 Sunday 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 Monday 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 23:59 on Sun 5 Dec to 02:15 on Tue 7 Dec.

    1976-12-05T15:58:42Z → 1976-12-06T18:14:32Z

  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 18441 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1976: Monday 6 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1976 falls on Monday 6 December. Pūrṇimā runs from 23:59 on Sun 5 Dec to 02:15 on Tue 7 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1976/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 6 Dec
Ahargaṇa, classicalDisc centre, no refractionMon 6 Dec
compat-drikpanchangComparison profileMon 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 Angeles07:59 → 10:1516:43112 min16:430 min5 Dec
Chicago09:59 → 12:1516:19118 min16:190 min5 Dec
Jersey City10:59 → 13:1516:29117 min16:280 min5 Dec
Port of Spain11:59 → 14:1517:43100 min17:430 min5 Dec
London15:59 → 18:1515:52122 min15:52128 min6 Dec
Durban17:59 → 20:1518:4680 min18:4680 min5 Dec
Dubai19:59 → 22:1517:290 min17:29107 min6 Dec
Delhi21:29 → 23:4517:240 min17:24109 min6 Dec
Kolkata21:29 → 23:4516:520 min16:52106 min6 Dec
Singapore23:29 → 01:4518:270 min18:2796 min6 Dec
Sydney02:59 → 05:1519:540 min19:5578 min6 Dec
Suva03:59 → 06:1518:320 min18:3287 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

About Ahargaṇa