Ruling · Rukmiṇī Dvādaśī · 1985

Thursday 2 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 164 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 1 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:14  12:02 madhyāhna ends
10:2610:5011:1411:3812:0212:2612:50

0 of 48 minutes covered

Midday of Thursday 2 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

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 17:54 on Wed 1 May to 14:46 on Thu 2 May.

    1985-05-01T09:53:57Z → 1985-05-02T06:45:39Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:14–12:02 on the 1st, 11:13–12:01 on the 2nd.

    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 1st and 48 of 48 on the 2nd.

    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 9853 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 1985: Thursday 2 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 1985 falls on Thursday 2 May. Dvādaśī runs from 17:54 on Wed 1 May to 14:46 on Thu 2 May and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/1985/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 2 May
Ahargaṇa, classicalDisc centre, no refractionThu 2 May
compat-drikpanchangComparison profileThu 2 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 1stCoveredMadhyāhna 2ndCoveredRuled
Los Angeles02:54 → 23:4612:2648 min12:260 min1 May
Chicago04:54 → 01:4612:2448 min12:240 min1 May
Jersey City05:54 → 02:4612:3048 min12:300 min1 May
Port of Spain05:54 → 02:4611:3948 min11:390 min1 May
London10:54 → 07:4612:3448 min12:340 min1 May
Durban11:54 → 08:4611:2923 min11:290 min1 May
Dubai13:54 → 10:4611:520 min11:520 min2 May
Delhi15:24 → 12:1611:540 min11:5421 min2 May
Kolkata15:24 → 12:1611:100 min11:1048 min2 May
Singapore17:54 → 14:4612:380 min12:3848 min2 May
Sydney19:54 → 16:4611:280 min11:2848 min2 May
Suva21:54 → 18:4611:390 min11:3948 min2 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

About Ahargaṇa