Ruling · Rukmiṇī Dvādaśī · 1964

Friday 22 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 7 min 14 s.

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 Friday 22 May

Taken. The only midday Dvādaśī reaches.

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

48 of 48 minutes covered

Midday of Saturday 23 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
Dvādaśī ends 11:05:43
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 09:39 on Fri 22 May to 11:06 on Sat 23 May.

    1964-05-22T01:39:03Z → 1964-05-23T03:05:43Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 22nd, 11:13–12:01 on the 23rd.

    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 22nd and 0 of 48 on the 23rd.

    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 434 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 1964: Friday 22 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 1964 falls on Friday 22 May. Dvādaśī runs from 09:39 on Fri 22 May to 11:06 on Sat 23 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1964/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 22 May
Ahargaṇa, classicalDisc centre, no refractionFri 22 May
compat-drikpanchangComparison profileFri 22 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 22ndCoveredMadhyāhna 23rdCoveredRuled
Los Angeles18:39 → 20:0612:2648 min12:260 min22 May
Chicago20:39 → 22:0612:2348 min12:240 min22 May
Jersey City21:39 → 23:0612:2948 min12:290 min22 May
Port of Spain21:39 → 23:0611:3948 min11:390 min22 May
London02:39 → 04:0612:3448 min12:340 min22 May
Durban03:39 → 05:0611:2848 min11:280 min22 May
Dubai05:39 → 07:0611:5148 min11:520 min22 May
Delhi07:09 → 08:3611:5448 min11:540 min22 May
Kolkata07:09 → 08:3611:0948 min11:090 min22 May
Singapore09:09 → 10:3612:0748 min12:070 min22 May
Sydney11:39 → 13:0611:2837 min11:2848 min22 May
Suva13:39 → 15:0611:390 min11:3948 min23 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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