Ruling · Rukmiṇī Dvādaśī · 2090

Thursday 11 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 30 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 Wednesday 10 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
Dvādaśī begins 12:30:54
10:2510:4911:1311:3712:0112:2512:49

0 of 48 minutes covered

Midday of Thursday 11 May

Taken. Dvādaśī reaches neither midday; the rule takes the second day.

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 12:31 on Wed 10 May to 09:58 on Thu 11 May.

    2090-05-10T04:30:54Z → 2090-05-11T01:58:12Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 10th, 11:13–12:01 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 0 of 48 on the 11th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: purvaviddha → second-day · margin 1783 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 2090: Thursday 11 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 2090 falls on Thursday 11 May. Dvādaśī runs from 12:31 on Wed 10 May to 09:58 on Thu 11 May, and reaches madhyāhna on neither day.

ahargana.org/daqing/festivals/2090/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 11 May
Ahargaṇa, classicalDisc centre, no refractionThu 11 May
compat-drikpanchangComparison profileWed 10 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 Angeles21:31 → 18:5812:2648 min12:260 min10 May
Chicago23:31 → 20:5812:2448 min12:240 min10 May
Jersey City00:31 → 21:5812:2948 min12:290 min10 May
Port of Spain00:31 → 21:5811:3948 min11:390 min10 May
London05:31 → 02:5812:3448 min12:340 min10 May
Durban06:31 → 03:5811:2948 min11:280 min10 May
Dubai08:31 → 05:5811:5248 min11:520 min10 May
Delhi10:01 → 07:2811:5448 min11:540 min10 May
Kolkata10:01 → 07:2811:0948 min11:090 min10 May
Singapore12:31 → 09:5812:3748 min12:370 min10 May
Sydney14:31 → 11:5811:280 min11:2830 min11 May
Suva16:31 → 13:5811:390 min11:3948 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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