Ruling · Dattātreyotpatti (Datta Jayanti) · 2052

Thursday 5 December

Boundaryin Baoding, under the Rashtriya Panchang method. Pūrṇimā reaches pradoṣa on neither day and the rule does not say what then. Say “contested”.

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 Thursday 5 December

Taken. Pūrṇimā reaches neither evening; this is the day it falls on.

16:56 sunsetpradoṣa ends 18:51
Pūrṇimā begins 19:12:51
16:3216:5617:2017:4418:0818:3218:5619:20

0 of 116 minutes covered

Evening of Friday 6 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

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

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 19:13 on Thu 5 Dec to 15:18 on Fri 6 Dec.

    2052-12-05T11:12:51Z → 2052-12-06T07:18:12Z

  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 0 of 116 on the 6th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Neither evening qualifies. The day the tithi falls on is taken.

    priority: unstated → tithi-day · margin 1290 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2052: Thursday 5 December.

    confidence: boundary (absent-unstated)

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2052 falls on Thursday 5 December. Pūrṇimā runs from 19:13 on Thu 5 Dec to 15:18 on Fri 6 Dec, and reaches pradoṣa on neither day.

ahargana.org/baoding/festivals/2052/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 5 Dec
Ahargaṇa, classicalDisc centre, no refractionThu 5 Dec
compat-drikpanchangComparison profileThu 5 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 Angeles03:13 → 23:1816:43112 min16:430 min5 Dec
Chicago05:13 → 01:1816:19118 min16:190 min5 Dec
Jersey City06:13 → 02:1816:28117 min16:280 min5 Dec
Port of Spain07:13 → 03:1817:43100 min17:430 min5 Dec
London11:13 → 07:1815:52128 min15:520 min5 Dec
Durban13:13 → 09:1818:4680 min18:470 min5 Dec
Dubai15:13 → 11:1817:29107 min17:290 min5 Dec
Delhi16:43 → 12:4817:24109 min17:240 min5 Dec
Kolkata16:43 → 12:4816:52106 min16:520 min5 Dec
Singapore19:13 → 15:1818:5780 min18:570 min5 Dec
Sydney22:13 → 18:1819:550 min19:560 min5 Dec
Suva23:13 → 19:1818:320 min18:3246 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

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