Ruling · Govatsa Dvādaśī (Vasu Baras) · 2052

Saturday 19 October

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 3 min 53 s away. Say “contested”.

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 18 October

Dvādaśī is absent from pradoṣa. Not taken.

17:35 sunsetpradoṣa ends 19:19
Dvādaśī begins 19:22:24
17:1117:3517:5918:2318:4719:1119:35

0 of 104 minutes covered

Evening of Saturday 19 October

Taken. The only evening Dvādaśī reaches.

17:34 sunsetpradoṣa ends 19:17
17:1017:3417:5818:2218:4619:1019:34

104 of 104 minutes covered

Dvādaśī presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 19:22 on Fri 18 Oct to 19:38 on Sat 19 Oct.

    2052-10-18T11:22:25Z → 2052-10-19T11:38:19Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:35–19:19 on the 18th, 17:34–19:17 on the 19th.

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

  3. 03

    Rule

    Dvādaśī must be present during pradoṣa. It covers 0 of 104 minutes on the 18th and 104 of 104 on the 19th.

    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: purvaviddha → only-day · margin 233 s < 300 s

  5. 05

    Ruling

    Govatsa Dvādaśī, Baoding, 2052: Saturday 19 October.

    confidence: boundary (margin)

Say it like this

In Baoding, Govatsa Dvādaśī (Vasu Baras) 2052 falls on Saturday 19 October. Dvādaśī runs from 19:22 on Fri 18 Oct to 19:38 on Sat 19 Oct and covers all of pradoṣa that evening. It is 3 min 53 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2052/govatsa-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 19 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 19 Oct
compat-drikpanchangComparison profileFri 18 Oct
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/govatsa-dvadashi · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Kṛṣṇa · Dvādaśī
Kāla
Pradoṣa
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“K 12 Govatsa dvadasi (pradosa vyapini). If occurs on two days, it is to be observed on the first day.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīSunset 18thCoveredSunset 19thCoveredRuled
Los Angeles04:22 → 04:3818:14102 min18:130 min18 Oct
Chicago06:22 → 06:3818:03105 min18:020 min18 Oct
Jersey City07:22 → 07:3818:10104 min18:090 min18 Oct
Port of Spain07:22 → 07:3817:4797 min17:460 min18 Oct
London12:22 → 12:3817:59108 min17:570 min18 Oct
Durban13:22 → 13:3818:0889 min18:090 min18 Oct
Dubai15:22 → 15:3817:48100 min17:480 min18 Oct
Delhi16:52 → 17:0817:48101 min17:470 min18 Oct
Kolkata16:52 → 17:0817:08100 min17:081 min18 Oct
Singapore19:22 → 19:3818:5265 min18:5247 min18 Oct
Sydney22:22 → 22:3819:110 min19:1287 min19 Oct
Suva23:22 → 23:3818:080 min18:0891 min19 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
govatsa-dvadashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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