Ruling · Dattātreyotpatti (Datta Jayanti) · 1909

Sunday 26 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 579 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 Sunday 26 December

Taken. The only evening Pūrṇimā reaches.

17:02 sunsetpradoṣa ends 18:58
16:3817:0217:2617:5018:1418:3819:0219:26

117 of 117 minutes covered

Evening of Monday 27 December

Pūrṇimā is absent from pradoṣa. Not taken.

17:02 sunsetpradoṣa ends 18:59
16:3817:0217:2617:5018:1418:3819:0219:26

0 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 07:23 on Sun 26 Dec to 05:30 on Mon 27 Dec.

    1909-12-25T23:22:53Z → 1909-12-26T21:29:45Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:02–18:58 on the 26th, 17:02–18:59 on the 27th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 117 of 117 minutes on the 26th and 0 of 117 on the 27th.

    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 34724 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1909: Sunday 26 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1909 falls on Sunday 26 December. Pūrṇimā runs from 07:23 on Sun 26 Dec to 05:30 on Mon 27 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1909/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 26 Dec
Ahargaṇa, classicalDisc centre, no refractionSun 26 Dec
compat-drikpanchangComparison profileSun 26 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 25thCoveredSunset 26thCoveredRuled
Los Angeles15:23 → 13:3016:50113 min16:500 min25 Dec
Chicago17:23 → 15:3016:2561 min16:250 min25 Dec
Jersey City18:23 → 16:3016:349 min16:340 min25 Dec
Port of Spain19:23 → 17:3017:518 min17:520 min25 Dec
London23:23 → 21:3015:550 min15:56129 min26 Dec
Durban01:23 → 23:3018:580 min18:5880 min26 Dec
Dubai03:04 → 01:1117:170 min17:17107 min26 Dec
Delhi04:53 → 03:0017:300 min17:31110 min26 Dec
Kolkata04:53 → 03:0016:590 min16:59106 min26 Dec
Singapore06:23 → 04:3018:060 min18:0696 min26 Dec
Sydney09:23 → 07:3019:070 min19:0777 min26 Dec
Suva11:18 → 09:2518:370 min18:3886 min26 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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