Ruling · Dattātreyotpatti (Datta Jayanti) · 2085

Friday 30 November

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 15 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 30 November

Taken. The only evening Pūrṇimā reaches.

16:57 sunsetpradoṣa ends 18:52
Pūrṇimā begins 17:11:57
16:3316:5717:2117:4518:0918:3318:5719:21

100 of 115 minutes covered, the last 100

Evening of Saturday 1 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 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 17:12 on Fri 30 Nov to 16:11 on Sat 1 Dec.

    2085-11-30T09:11:58Z → 2085-12-01T08:11:17Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:57–18:52 on the 30th, 16:56–18:51 on the 1st.

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

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 100 of 115 minutes on the 30th and 0 of 115 on the 1st.

    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 921 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2085: Friday 30 November.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2085 falls on Friday 30 November. Pūrṇimā runs from 17:12 on Fri 30 Nov to 16:11 on Sat 1 Dec and covers 100 of 115 minutes of pradoṣa that evening.

ahargana.org/baoding/festivals/2085/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 30thCoveredSunset 1stCoveredRuled
Los Angeles01:12 → 00:1116:43112 min16:430 min30 Nov
Chicago03:12 → 02:1116:20117 min16:200 min30 Nov
Jersey City04:12 → 03:1116:29116 min16:290 min30 Nov
Port of Spain05:12 → 04:1117:41100 min17:420 min30 Nov
London09:12 → 08:1115:55127 min15:540 min30 Nov
Durban11:12 → 10:1118:4281 min18:430 min30 Nov
Dubai13:12 → 12:1117:28107 min17:290 min30 Nov
Delhi14:42 → 13:4117:24108 min17:240 min30 Nov
Kolkata14:42 → 13:4116:51105 min16:510 min30 Nov
Singapore17:12 → 16:1118:5596 min18:550 min30 Nov
Sydney20:12 → 19:1119:5157 min19:510 min30 Nov
Suva21:12 → 20:1118:290 min18:2987 min1 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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