Ruling · Rukmiṇī Dvādaśī · 1971

Thursday 6 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 8 min 24 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 Thursday 6 May

Taken. Both middays qualify; the rule takes the first.

madhyāhna begins 11:13  12:01 madhyāhna ends
Dvādaśī begins 11:52:40
10:2510:4911:1311:3712:0112:2512:49

8 of 48 minutes covered, the last 8

Midday of Friday 7 May

Qualifies with 48 of 48 minutes. Not taken.

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 11:53 on Thu 6 May to 14:18 on Fri 7 May.

    1971-05-06T03:52:41Z → 1971-05-07T06:18:07Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 6th, 11:13–12:01 on the 7th.

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

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 8 of 48 minutes on the 6th and 48 of 48 on the 7th.

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

  4. 04

    Tie-break

    Both middays qualify. Pūrvaviddhā: the first is taken.

    priority: purvaviddha → purvaviddha · margin 504 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 1971: Thursday 6 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 1971 falls on Thursday 6 May. Dvādaśī runs from 11:53 on Thu 6 May to 14:18 on Fri 7 May and covers 8 of 48 minutes of madhyāhna that midday. It also reaches the next midday for 48 minutes; by the rule the first midday is taken.

ahargana.org/daqing/festivals/1971/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 6 May
Ahargaṇa, classicalDisc centre, no refractionThu 6 May
compat-drikpanchangComparison profileThu 6 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 6thCoveredMadhyāhna 7thCoveredRuled
Los Angeles20:53 → 23:1812:2648 min12:260 min6 May
Chicago22:53 → 01:1812:2448 min12:230 min6 May
Jersey City23:53 → 02:1812:2948 min12:290 min6 May
Port of Spain23:53 → 02:1811:3948 min11:390 min6 May
London04:53 → 07:1812:3448 min12:340 min6 May
Durban05:53 → 08:1811:2848 min11:280 min6 May
Dubai07:53 → 10:1811:5248 min11:510 min6 May
Delhi09:23 → 11:4811:5448 min11:540 min6 May
Kolkata09:23 → 11:4811:0948 min11:0939 min6 May
Singapore11:23 → 13:4812:0748 min12:0748 min6 May
Sydney13:53 → 16:1811:280 min11:2848 min7 May
Suva15:53 → 18:1811:390 min11:3948 min7 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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