Ruling · Rukmiṇī Dvādaśī · 1900

Friday 11 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 341 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 Thursday 10 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

Midday of Friday 11 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

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 17:47 on Thu 10 May to 19:52 on Fri 11 May.

    1900-05-10T09:41:54Z → 1900-05-11T11:46:46Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:18–12:06 on the 10th, 11:18–12:06 on the 11th.

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

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 10th and 48 of 48 on the 11th.

    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 20472 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 1900: Friday 11 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 1900 falls on Friday 11 May. Dvādaśī runs from 17:47 on Thu 10 May to 19:52 on Fri 11 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1900/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 11 May
Ahargaṇa, classicalDisc centre, no refractionFri 11 May
compat-drikpanchangComparison profileFri 11 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 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles01:42 → 03:4711:2548 min11:250 min10 May
Chicago03:42 → 05:4711:2348 min11:230 min10 May
Jersey City04:42 → 06:4711:2948 min11:290 min10 May
Port of Spain05:42 → 07:4711:3848 min11:380 min10 May
London09:42 → 11:4711:3348 min11:3314 min10 May
Durban11:12 → 13:1710:5834 min10:5848 min10 May
Dubai13:23 → 15:2811:320 min11:3248 min11 May
Delhi15:03 → 17:0811:450 min11:4548 min11 May
Kolkata15:03 → 17:0811:000 min11:0048 min11 May
Singapore16:37 → 18:4211:320 min11:3248 min11 May
Sydney19:42 → 21:4711:270 min11:2748 min11 May
Suva21:37 → 23:4211:340 min11:3348 min11 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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