Ruling · Rukmiṇī Dvādaśī · 2027

Sunday 16 May

Determinatein Chicago, under the Rashtriya Panchang method. Clear of every threshold by 339 minutes.

Decide it for

ChicagoDelhiKolkataSingaporeSydneyJersey City

41°51′ N 87°39′ W · America/Chicago · GeoNames 4887398

The two middays

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

Midday of Sunday 16 May

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 12:23  13:11 madhyāhna ends
11:3511:5912:2312:4713:1113:3513:59

48 of 48 minutes covered

Midday of Monday 17 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:23  13:11 madhyāhna ends
11:3511:5912:2312:4713:1113:3513:59

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 06:44 on Sun 16 May to 05:59 on Mon 17 May.

    2027-05-16T11:43:56Z → 2027-05-17T10:58:41Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:23–13:11 on the 16th, 12:23–13:11 on the 17th.

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

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 48 of 48 minutes on the 16th and 0 of 48 on the 17th.

    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 20362 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Chicago, 2027: Sunday 16 May.

    confidence: determinate

Say it like this

In Chicago, Rukmiṇī Dvādaśī 2027 falls on Sunday 16 May. Dvādaśī runs from 06:44 on Sun 16 May to 05:59 on Mon 17 May and covers all of madhyāhna that midday.

ahargana.org/chicago/festivals/2027/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 16 May
Ahargaṇa, classicalDisc centre, no refractionSun 16 May
compat-drikpanchangComparison profileSun 16 May
No institution has a recorded ruling for Chicago.

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 16thCoveredMadhyāhna 17thCoveredRuled
Los Angeles04:44 → 03:5912:2648 min12:260 min16 May
Chicago06:44 → 05:5912:2348 min12:230 min16 May
Jersey City07:44 → 06:5912:2948 min12:290 min16 May
Port of Spain07:44 → 06:5911:3948 min11:390 min16 May
London12:44 → 11:5912:3337 min12:330 min16 May
Durban13:44 → 12:5911:280 min11:2848 min17 May
Dubai15:44 → 14:5911:510 min11:5148 min17 May
Delhi17:14 → 16:2911:540 min11:5448 min17 May
Kolkata17:14 → 16:2911:090 min11:0948 min17 May
Singapore19:44 → 18:5912:370 min12:3748 min17 May
Sydney21:44 → 20:5911:270 min11:2748 min17 May
Suva23:44 → 22:5911:390 min11:3948 min17 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