Ruling · Govatsa Dvādaśī (Vasu Baras) · 1987

Monday 19 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 182 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 18 October

Dvādaśī is absent from pradoṣa. Not taken.

17:37 sunsetpradoṣa ends 19:20
17:1317:3718:0118:2518:4919:1319:37

0 of 103 minutes covered

Evening of Monday 19 October

Taken. The only evening Dvādaśī reaches.

17:35 sunsetpradoṣa ends 19:19
17:1117:3517:5918:2318:4719:1119:35

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 22:22 on Sun 18 Oct to 00:02 on Tue 20 Oct.

    1987-10-18T14:22:17Z → 1987-10-19T16:01:39Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:37–19:20 on the 18th, 17:35–19:19 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 103 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 10949 s

  5. 05

    Ruling

    Govatsa Dvādaśī, Baoding, 1987: Monday 19 October.

    confidence: determinate

Say it like this

In Baoding, Govatsa Dvādaśī (Vasu Baras) 1987 falls on Monday 19 October. Dvādaśī runs from 22:22 on Sun 18 Oct to 00:02 on Tue 20 Oct and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1987/govatsa-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 19 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 19 Oct
compat-drikpanchangComparison profileMon 19 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 Angeles07:22 → 09:0218:15102 min18:140 min18 Oct
Chicago09:22 → 11:0218:05104 min18:030 min18 Oct
Jersey City10:22 → 12:0218:12104 min18:100 min18 Oct
Port of Spain10:22 → 12:0217:4797 min17:470 min18 Oct
London15:22 → 17:0218:02108 min18:000 min18 Oct
Durban16:22 → 18:0218:0789 min18:080 min18 Oct
Dubai18:22 → 20:0217:4967 min17:49100 min18 Oct
Delhi19:52 → 21:3217:490 min17:48101 min19 Oct
Kolkata19:52 → 21:3217:090 min17:08100 min19 Oct
Singapore22:22 → 00:0218:520 min18:5295 min19 Oct
Sydney00:22 → 02:0218:100 min18:1188 min19 Oct
Suva02:22 → 04:0218:070 min18:0892 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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