Ruling · Rukmiṇī Dvādaśī · 1981

Friday 15 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 616 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 Friday 15 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 16 May

Dvādaśī is absent from madhyāhna. Not taken.

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 22:46 on Thu 14 May to 00:57 on Sat 16 May.

    1981-05-14T14:46:14Z → 1981-05-15T16:56:54Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 15th, 11:13–12:01 on the 16th.

    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 15th and 0 of 48 on the 16th.

    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 36947 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 1981: Friday 15 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 1981 falls on Friday 15 May. Dvādaśī runs from 22:46 on Thu 14 May to 00:57 on Sat 16 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1981/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 15 May
Ahargaṇa, classicalDisc centre, no refractionFri 15 May
compat-drikpanchangComparison profileFri 15 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 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles07:46 → 09:5712:2548 min12:250 min14 May
Chicago09:46 → 11:5712:2348 min12:230 min14 May
Jersey City10:46 → 12:5712:2948 min12:2928 min14 May
Port of Spain10:46 → 12:5711:3848 min11:3848 min14 May
London15:46 → 17:5712:330 min12:3348 min15 May
Durban16:46 → 18:5711:280 min11:2848 min15 May
Dubai18:46 → 20:5711:510 min11:5148 min15 May
Delhi20:16 → 22:2711:540 min11:5448 min15 May
Kolkata20:16 → 22:2711:090 min11:0948 min15 May
Singapore22:16 → 00:2712:070 min12:0748 min15 May
Sydney00:46 → 02:5711:270 min11:2748 min15 May
Suva02:46 → 04:5711:390 min11:3948 min15 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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