Ruling · Dattātreyotpatti (Datta Jayanti) · 2037

Tuesday 22 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 162 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 21 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:59 sunsetpradoṣa ends 18:56
16:3516:5917:2317:4718:1118:3518:5919:23

0 of 117 minutes covered

Evening of Tuesday 22 December

Taken. The only evening Pūrṇimā reaches.

17:00 sunsetpradoṣa ends 18:56
16:3617:0017:2417:4818:1218:3619:0019:24

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 21:47 on Mon 21 Dec to 21:39 on Tue 22 Dec.

    2037-12-21T13:46:45Z → 2037-12-22T13:38:41Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:59–18:56 on the 21st, 17:00–18:56 on the 22nd.

    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 21st and 117 of 117 on the 22nd.

    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 9745 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2037: Tuesday 22 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2037 falls on Tuesday 22 December. Pūrṇimā runs from 21:47 on Mon 21 Dec to 21:39 on Tue 22 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2037/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 22 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 22 Dec
compat-drikpanchangComparison profileTue 22 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 21stCoveredSunset 22ndCoveredRuled
Los Angeles05:47 → 05:3916:48113 min16:480 min21 Dec
Chicago07:47 → 07:3916:23119 min16:230 min21 Dec
Jersey City08:47 → 08:3916:32118 min16:320 min21 Dec
Port of Spain09:47 → 09:3917:49100 min17:500 min21 Dec
London13:47 → 13:3915:53130 min15:540 min21 Dec
Durban15:47 → 15:3918:5680 min18:560 min21 Dec
Dubai17:47 → 17:3917:3495 min17:354 min21 Dec
Delhi19:17 → 19:0917:281 min17:29100 min22 Dec
Kolkata19:17 → 19:0916:570 min16:57106 min22 Dec
Singapore21:47 → 21:3919:040 min19:0496 min22 Dec
Sydney00:47 → 00:3920:050 min20:0677 min22 Dec
Suva01:47 → 01:3918:410 min18:4186 min22 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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