Ruling · Rukmiṇī Dvādaśī · 1921

Wednesday 18 May

Determinatein Chattogram, under the Rashtriya Panchang method. Clear of every threshold by 469 minutes.

Decide it for

ChattogramDelhiKolkataSingaporeSydneyJersey City

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

The two middays

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

Midday of Wednesday 18 May

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:18  12:06 madhyāhna ends
10:3010:5411:1811:4212:0612:3012:54

48 of 48 minutes covered

Midday of Thursday 19 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:18  12:06 madhyāhna ends
10:3010:5411:1811:4212:0612:3012:54

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 03:29 on Wed 18 May to 02:34 on Thu 19 May.

    1921-05-17T21:36:20Z → 1921-05-18T20:41:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:18–12:06 on the 18th, 11:18–12:06 on the 19th.

    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 18th and 0 of 48 on the 19th.

    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 28122 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Chattogram, 1921: Wednesday 18 May.

    confidence: determinate

Say it like this

In Chattogram, Rukmiṇī Dvādaśī 1921 falls on Wednesday 18 May. Dvādaśī runs from 03:29 on Wed 18 May to 02:34 on Thu 19 May and covers all of madhyāhna that midday.

ahargana.org/chattogram/festivals/1921/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingWed 18 May
Ahargaṇa, classicalDisc centre, no refractionWed 18 May
compat-drikpanchangComparison profileWed 18 May
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/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 17thCoveredMadhyāhna 18thCoveredRuled
Los Angeles13:36 → 12:4111:250 min11:2548 min18 May
Chicago16:36 → 15:4112:230 min12:2348 min18 May
Jersey City17:36 → 16:4112:290 min12:2948 min18 May
Port of Spain17:36 → 16:4111:380 min11:3848 min18 May
London22:36 → 21:4112:330 min12:3348 min18 May
Durban23:36 → 22:4111:280 min11:2848 min18 May
Dubai01:36 → 00:4111:510 min11:5148 min18 May
Delhi03:06 → 02:1111:530 min11:5348 min18 May
Kolkata03:06 → 02:1111:090 min11:0948 min18 May
Singapore04:36 → 03:4111:370 min11:3748 min18 May
Sydney07:36 → 06:4111:270 min11:2748 min18 May
Suva09:36 → 08:4111:380 min11:3848 min18 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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