Ruling · Dattātreyotpatti (Datta Jayanti) · 2098

Monday 8 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 176 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 7 December

Pūrṇimā is absent from pradoṣa. Not taken.

16:56 sunsetpradoṣa ends 18:52
16:3216:5617:2017:4418:0818:3218:5619:20

0 of 116 minutes covered

Evening of Monday 8 December

Taken. The only evening Pūrṇimā reaches.

16:56 sunsetpradoṣa ends 18:52
16:3216:5617:2017:4418:0818:3218:5619:20

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 23:29 on Sun 7 Dec to 21:48 on Mon 8 Dec.

    2098-12-07T15:29:28Z → 2098-12-08T13:47:34Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 16:56–18:52 on the 7th, 16:56–18:52 on the 8th.

    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 7th and 116 of 116 on the 8th.

    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 10543 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 2098: Monday 8 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 2098 falls on Monday 8 December. Pūrṇimā runs from 23:29 on Sun 7 Dec to 21:48 on Mon 8 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/2098/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 8 Dec
Ahargaṇa, classicalDisc centre, no refractionMon 8 Dec
compat-drikpanchangComparison profileMon 8 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 7thCoveredSunset 8thCoveredRuled
Los Angeles07:29 → 05:4816:44112 min16:440 min7 Dec
Chicago09:29 → 07:4816:19118 min16:190 min7 Dec
Jersey City10:29 → 08:4816:29117 min16:290 min7 Dec
Port of Spain11:29 → 09:4817:44100 min17:440 min7 Dec
London15:29 → 13:4815:52128 min15:520 min7 Dec
Durban17:29 → 15:4818:4880 min18:480 min7 Dec
Dubai19:29 → 17:4817:290 min17:3018 min8 Dec
Delhi20:59 → 19:1817:240 min17:24109 min8 Dec
Kolkata20:59 → 19:1816:520 min16:52106 min8 Dec
Singapore23:29 → 21:4818:580 min18:5896 min8 Dec
Sydney02:29 → 00:4819:560 min19:5777 min8 Dec
Suva03:29 → 01:4818:330 min18:3487 min8 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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