Ruling · Govatsa Dvādaśī (Vasu Baras) · 2009

Thursday 15 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 14 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 Wednesday 14 October

Dvādaśī is absent from pradoṣa. Not taken.

17:41 sunsetpradoṣa ends 19:23
17:1717:4118:0518:2918:5319:1719:41

0 of 102 minutes covered

Evening of Thursday 15 October

Taken. The only evening Dvādaśī reaches.

17:40 sunsetpradoṣa ends 19:22
Dvādaśī ends 19:08:40
17:1617:4018:0418:2818:5219:1619:40

89 of 102 minutes covered, the first 89

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 21:22 on Wed 14 Oct to 19:09 on Thu 15 Oct.

    2009-10-14T13:22:30Z → 2009-10-15T11:08:41Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:41–19:23 on the 14th, 17:40–19:22 on the 15th.

    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 102 minutes on the 14th and 89 of 102 on the 15th.

    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 821 s

  5. 05

    Ruling

    Govatsa Dvādaśī, Baoding, 2009: Thursday 15 October.

    confidence: determinate

Say it like this

In Baoding, Govatsa Dvādaśī (Vasu Baras) 2009 falls on Thursday 15 October. Dvādaśī runs from 21:22 on Wed 14 Oct to 19:09 on Thu 15 Oct and covers 89 of 102 minutes of pradoṣa that evening.

ahargana.org/baoding/festivals/2009/govatsa-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 15 Oct
Ahargaṇa, classicalDisc centre, no refractionThu 15 Oct
compat-drikpanchangComparison profileThu 15 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 14thCoveredSunset 15thCoveredRuled
Los Angeles06:22 → 04:0918:19101 min18:180 min14 Oct
Chicago08:22 → 06:0918:10103 min18:080 min14 Oct
Jersey City09:22 → 07:0918:17103 min18:150 min14 Oct
Port of Spain09:22 → 07:0917:4997 min17:480 min14 Oct
London14:22 → 12:0918:09106 min18:070 min14 Oct
Durban15:22 → 13:0918:0590 min18:050 min14 Oct
Dubai17:22 → 15:0917:5299 min17:520 min14 Oct
Delhi18:52 → 16:3917:5240 min17:510 min14 Oct
Kolkata18:52 → 16:3917:120 min17:110 min14 Oct
Singapore21:22 → 19:0918:530 min18:5316 min15 Oct
Sydney00:22 → 22:0919:070 min19:0889 min15 Oct
Suva01:22 → 23:0918:060 min18:0792 min15 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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