Ruling · Govatsa Dvādaśī (Vasu Baras) · 2021

Monday 1 November

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 203 minutes.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

22°20′ N 91°50′ E · Asia/Dhaka · GeoNames 1205733

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Monday 1 November

Taken. The only evening Dvādaśī reaches.

17:15 sunsetpradoṣa ends 18:57
16:5117:1517:3918:0318:2718:5119:15

102 of 102 minutes covered

Evening of Tuesday 2 November

Dvādaśī is absent from pradoṣa. Not taken.

17:15 sunsetpradoṣa ends 18:56
16:5117:1517:3918:0318:2718:5119:15

0 of 102 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 13:52 on Mon 1 Nov to 12:01 on Tue 2 Nov.

    2021-11-01T07:52:07Z → 2021-11-02T06:01:27Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:15–18:57 on the 1st, 17:15–18:56 on the 2nd.

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

  3. 03

    Rule

    Dvādaśī must be present during pradoṣa. It covers 102 of 102 minutes on the 1st and 0 of 102 on the 2nd.

    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 12186 s

  5. 05

    Ruling

    Govatsa Dvādaśī, Chattogram, 2021: Monday 1 November.

    confidence: determinate

Say it like this

In Chattogram, Govatsa Dvādaśī (Vasu Baras) 2021 falls on Monday 1 November. Dvādaśī runs from 13:52 on Mon 1 Nov to 12:01 on Tue 2 Nov and covers all of pradoṣa that evening.

ahargana.org/chattogram/festivals/2021/govatsa-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 1 Nov
Ahargaṇa, classicalDisc centre, no refractionMon 1 Nov
compat-drikpanchangComparison profileMon 1 Nov
No institution has a recorded ruling for Chattogram.

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 1stCoveredSunset 2ndCoveredRuled
Los Angeles00:52 → 23:0117:59106 min17:590 min1 Nov
Chicago02:52 → 01:0117:44109 min17:430 min1 Nov
Jersey City03:52 → 02:0117:52109 min17:510 min1 Nov
Port of Spain03:52 → 02:0117:4298 min17:410 min1 Nov
London07:52 → 06:0116:33115 min16:310 min1 Nov
Durban09:52 → 08:0118:1886 min18:180 min1 Nov
Dubai11:52 → 10:0117:38103 min17:370 min1 Nov
Delhi13:22 → 11:3117:36104 min17:350 min1 Nov
Kolkata13:22 → 11:3116:59102 min16:580 min1 Nov
Singapore15:52 → 14:0118:5095 min18:500 min1 Nov
Sydney18:52 → 17:0119:2384 min19:240 min1 Nov
Suva19:52 → 18:0118:130 min18:130 min1 Nov
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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