Ruling · Rukmiṇī Dvādaśī · 2081

Monday 19 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 17 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Monday 19 May

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:13  12:01 madhyāhna ends
Dvādaśī begins 11:44:07
10:2510:4911:1311:3712:0112:2512:49

17 of 48 minutes covered, the last 17

Midday of Tuesday 20 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
10:2510:4911:1311:3712:0112:2512:49

0 of 48 minutes covered

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 11:44 on Mon 19 May to 09:36 on Tue 20 May.

    2081-05-19T03:44:07Z → 2081-05-20T01:36:26Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 19th, 11:13–12:01 on the 20th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 17 of 48 minutes on the 19th and 0 of 48 on the 20th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 1024 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 2081: Monday 19 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 2081 falls on Monday 19 May. Dvādaśī runs from 11:44 on Mon 19 May to 09:36 on Tue 20 May and covers 17 of 48 minutes of madhyāhna that midday.

ahargana.org/daqing/festivals/2081/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 19 May
Ahargaṇa, classicalDisc centre, no refractionMon 19 May
compat-drikpanchangComparison profileMon 19 May
No institution has a recorded ruling for Daqing.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/rukmini-dvadashi · ruleset 2026.3-draft

Month
Vaiśākha, amānta
Pakṣa · aṅga
Śukla · Dvādaśī
Kāla
Madhyāhna
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 102

“S 12 Parasurama dvadasi (purvaviddha), Rukmini dvadasi (purvaviddha)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 102.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīMadhyāhna 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles20:44 → 18:3612:2648 min12:260 min19 May
Chicago22:44 → 20:3612:2448 min12:240 min19 May
Jersey City23:44 → 21:3612:2948 min12:300 min19 May
Port of Spain23:44 → 21:3611:3948 min11:390 min19 May
London04:44 → 02:3612:3448 min12:340 min19 May
Durban05:44 → 03:3611:2948 min11:290 min19 May
Dubai07:44 → 05:3611:5248 min11:520 min19 May
Delhi09:14 → 07:0611:5448 min11:540 min19 May
Kolkata09:14 → 07:0611:1048 min11:100 min19 May
Singapore11:44 → 09:3612:3748 min12:380 min19 May
Sydney13:44 → 11:3611:280 min11:289 min20 May
Suva15:44 → 13:3611:390 min11:3948 min20 May
Profile · tradition
pac-rp@2026.1 · smarta
Rule
rukmini-dvadashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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