Ruling · Dattātreyotpatti (Datta Jayanti) · 1906

Friday 30 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 588 minutes.

Decide it for

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 29 November

Pūrṇimā is absent from pradoṣa. Not taken.

16:57 sunsetpradoṣa ends 18:52
16:3316:5717:2117:4518:0918:3318:5719:21

0 of 114 minutes covered

Evening of Friday 30 November

Taken. The only evening Pūrṇimā reaches.

16:57 sunsetpradoṣa ends 18:52
16:3316:5717:2117:4518:0918:3318:5719:21

115 of 115 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 04:40 on Fri 30 Nov to 07:07 on Sat 1 Dec.

    1906-11-29T20:39:34Z → 1906-11-30T23:07:02Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:57–18:52 on the 29th, 16:57–18:52 on the 30th.

    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 114 minutes on the 29th and 115 of 115 on the 30th.

    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 35268 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1906: Friday 30 November.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1906 falls on Friday 30 November. Pūrṇimā runs from 04:40 on Fri 30 Nov to 07:07 on Sat 1 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1906/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 30 Nov
Ahargaṇa, classicalDisc centre, no refractionFri 30 Nov
compat-drikpanchangComparison profileFri 30 Nov
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 29thCoveredSunset 30thCoveredRuled
Los Angeles12:40 → 15:0716:44111 min16:440 min29 Nov
Chicago14:40 → 17:0716:21117 min16:2146 min29 Nov
Jersey City15:40 → 18:0716:30116 min16:3097 min29 Nov
Port of Spain16:40 → 19:0717:41100 min17:4186 min29 Nov
London20:40 → 23:0715:570 min15:56126 min30 Nov
Durban22:40 → 01:0718:400 min18:4181 min30 Nov
Dubai00:21 → 02:4817:090 min17:09106 min30 Nov
Delhi02:10 → 04:3717:240 min17:24108 min30 Nov
Kolkata02:10 → 04:3716:510 min16:51105 min30 Nov
Singapore03:40 → 06:0717:540 min17:5496 min30 Nov
Sydney06:40 → 09:0718:480 min18:4978 min30 Nov
Suva08:35 → 11:0218:220 min18:2387 min30 Nov
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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