Ruling · Dattātreyotpatti (Datta Jayanti) · 1940

Saturday 14 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 475 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 Friday 13 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:56 sunsetpradoṣa ends 18:53
16:3216:5617:2017:4418:0818:3218:5619:20

0 of 116 minutes covered

Evening of Saturday 14 December

Taken. The only evening Pūrṇimā reaches.

16:57 sunsetpradoṣa ends 18:53
16:3316:5717:2117:4518:0918:3318:5719:21

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 02:47 on Sat 14 Dec to 03:38 on Sun 15 Dec.

    1940-12-13T18:47:13Z → 1940-12-14T19:37:35Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:53 on the 13th, 16:57–18:53 on the 14th.

    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 13th and 116 of 116 on the 14th.

    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 28473 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1940: Saturday 14 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1940 falls on Saturday 14 December. Pūrṇimā runs from 02:47 on Sat 14 Dec to 03:38 on Sun 15 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1940/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 14 Dec
Ahargaṇa, classicalDisc centre, no refractionSat 14 Dec
compat-drikpanchangComparison profileSat 14 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 13thCoveredSunset 14thCoveredRuled
Los Angeles10:47 → 11:3816:44113 min16:450 min13 Dec
Chicago12:47 → 13:3816:20119 min16:200 min13 Dec
Jersey City13:47 → 14:3816:29118 min16:290 min13 Dec
Port of Spain14:47 → 15:3817:46100 min17:460 min13 Dec
London19:47 → 20:3816:510 min16:51129 min14 Dec
Durban20:47 → 21:3818:510 min18:5280 min14 Dec
Dubai22:47 → 23:3817:310 min17:31107 min14 Dec
Delhi00:17 → 01:0817:250 min17:26109 min14 Dec
Kolkata00:17 → 01:0816:540 min16:54106 min14 Dec
Singapore02:07 → 02:5818:200 min18:2196 min14 Dec
Sydney04:47 → 05:3819:000 min19:0177 min14 Dec
Suva06:47 → 07:3818:360 min18:3786 min14 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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