Ruling · Dattātreyotpatti (Datta Jayanti) · 1910

Friday 16 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 12 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 Thursday 15 December

Pūrṇimā is absent from pradoṣa. Not taken.

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

0 of 116 minutes covered

Evening of Friday 16 December

Taken. The only evening Pūrṇimā reaches.

16:57 sunsetpradoṣa ends 18:53
Pūrṇimā ends 19:04:55
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 22:44 on Thu 15 Dec to 19:05 on Fri 16 Dec.

    1910-12-15T14:43:36Z → 1910-12-16T11:04:55Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:57–18:53 on the 15th, 16:57–18:53 on the 16th.

    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 15th and 116 of 116 on the 16th.

    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 691 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1910: Friday 16 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1910 falls on Friday 16 December. Pūrṇimā runs from 22:44 on Thu 15 Dec to 19:05 on Fri 16 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1910/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 16 Dec
Ahargaṇa, classicalDisc centre, no refractionFri 16 Dec
compat-drikpanchangComparison profileFri 16 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 15thCoveredSunset 16thCoveredRuled
Los Angeles06:44 → 03:0516:45113 min16:450 min15 Dec
Chicago08:44 → 05:0516:20119 min16:200 min15 Dec
Jersey City09:44 → 06:0516:29118 min16:300 min15 Dec
Port of Spain10:44 → 07:0517:46100 min17:470 min15 Dec
London14:44 → 11:0515:51129 min15:510 min15 Dec
Durban16:44 → 13:0518:5280 min18:530 min15 Dec
Dubai18:25 → 14:4617:1235 min17:130 min15 Dec
Delhi20:14 → 16:3517:260 min17:260 min15 Dec
Kolkata20:14 → 16:3516:540 min16:540 min15 Dec
Singapore21:44 → 18:0518:010 min18:014 min16 Dec
Sydney00:44 → 21:0519:010 min19:0277 min16 Dec
Suva02:39 → 23:0018:320 min18:3386 min16 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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