Ruling · Dattātreyotpatti (Datta Jayanti) · 2067

Tuesday 20 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 248 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 19 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:58 sunsetpradoṣa ends 18:55
16:3416:5817:2217:4618:1018:3418:5819:22

0 of 117 minutes covered

Evening of Tuesday 20 December

Taken. The only evening Pūrṇimā reaches.

16:59 sunsetpradoṣa ends 18:55
16:3516:5917:2317:4718:1118:3518:5919:23

117 of 117 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 23:03 on Mon 19 Dec to 23:42 on Tue 20 Dec.

    2067-12-19T15:02:59Z → 2067-12-20T15:42:22Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:58–18:55 on the 19th, 16:59–18:55 on the 20th.

    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 117 minutes on the 19th and 117 of 117 on the 20th.

    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 14892 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2067: Tuesday 20 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2067 falls on Tuesday 20 December. Pūrṇimā runs from 23:03 on Mon 19 Dec to 23:42 on Tue 20 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2067/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 20 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 20 Dec
compat-drikpanchangComparison profileTue 20 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 19thCoveredSunset 20thCoveredRuled
Los Angeles07:03 → 07:4216:47113 min16:470 min19 Dec
Chicago09:03 → 09:4216:22119 min16:220 min19 Dec
Jersey City10:03 → 10:4216:31118 min16:310 min19 Dec
Port of Spain11:03 → 11:4217:48100 min17:490 min19 Dec
London15:03 → 15:4215:52130 min15:530 min19 Dec
Durban17:03 → 17:4218:5580 min18:550 min19 Dec
Dubai19:03 → 19:4217:3318 min17:33107 min20 Dec
Delhi20:33 → 21:1217:270 min17:28110 min20 Dec
Kolkata20:33 → 21:1216:560 min16:56106 min20 Dec
Singapore23:03 → 23:4219:030 min19:0396 min20 Dec
Sydney02:03 → 02:4220:040 min20:0577 min20 Dec
Suva03:03 → 03:4218:400 min18:4086 min20 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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