Ruling · Dattātreyotpatti (Datta Jayanti) · 1952

Monday 1 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 110 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 30 November

Pūrṇimā is absent from pradoṣa. Not taken.

16:57 sunsetpradoṣa ends 18:51
16:3316:5717:2117:4518:0918:3318:5719:21

0 of 115 minutes covered

Evening of Monday 1 December

Taken. The only evening Pūrṇimā reaches.

16:56 sunsetpradoṣa ends 18:51
16:3216:5617:2017:4418:0818:3218:5619:20

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 21:14 on Sun 30 Nov to 20:41 on Mon 1 Dec.

    1952-11-30T13:13:56Z → 1952-12-01T12:41:21Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:57–18:51 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 0 of 115 minutes on the 30th and 115 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 6598 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1952: Monday 1 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1952 falls on Monday 1 December. Pūrṇimā runs from 21:14 on Sun 30 Nov to 20:41 on Mon 1 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1952/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 1 Dec
Ahargaṇa, classicalDisc centre, no refractionMon 1 Dec
compat-drikpanchangComparison profileMon 1 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 30thCoveredSunset 1stCoveredRuled
Los Angeles05:14 → 04:4116:43112 min16:430 min30 Nov
Chicago07:14 → 06:4116:21117 min16:200 min30 Nov
Jersey City08:14 → 07:4116:30116 min16:290 min30 Nov
Port of Spain09:14 → 08:4117:41100 min17:410 min30 Nov
London13:14 → 12:4115:55127 min15:550 min30 Nov
Durban15:14 → 14:4118:4281 min18:420 min30 Nov
Dubai17:14 → 16:4117:28106 min17:280 min30 Nov
Delhi18:44 → 18:1117:2428 min17:2448 min1 Dec
Kolkata18:44 → 18:1116:510 min16:5180 min1 Dec
Singapore20:44 → 20:1118:250 min18:2596 min1 Dec
Sydney23:14 → 22:4118:500 min18:5178 min1 Dec
Suva01:14 → 00:4118:280 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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