Ruling · Rukmiṇī Dvādaśī · 1902

Sunday 18 May

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 8 min 45 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 Sunday 18 May

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

madhyāhna begins 11:13  12:01 madhyāhna ends
Dvādaśī begins 10:35:48
10:2510:4911:1311:3712:0112:2512:49

48 of 48 minutes covered

Midday of Monday 19 May

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:13  12:01 madhyāhna ends
Dvādaśī ends 12:09:21
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 10:36 on Sun 18 May to 12:09 on Mon 19 May.

    1902-05-18T02:35:49Z → 1902-05-19T04:09:21Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:13–12:01 on the 18th, 11:13–12:01 on the 19th.

    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 18th and 48 of 48 on the 19th.

    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 525 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Daqing, 1902: Sunday 18 May.

    confidence: determinate

Say it like this

In Daqing, Rukmiṇī Dvādaśī 1902 falls on Sunday 18 May. Dvādaśī runs from 10:36 on Sun 18 May to 12:09 on Mon 19 May and covers all 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/1902/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSun 18 May
Ahargaṇa, classicalDisc centre, no refractionSun 18 May
compat-drikpanchangComparison profileSun 18 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles18:36 → 20:0911:2548 min11:250 min18 May
Chicago20:36 → 22:0911:2348 min11:230 min18 May
Jersey City21:36 → 23:0911:2948 min11:290 min18 May
Port of Spain22:36 → 00:0911:3848 min11:380 min18 May
London02:36 → 04:0911:3348 min11:330 min18 May
Durban04:06 → 05:3910:5848 min10:580 min18 May
Dubai06:17 → 07:5011:3248 min11:320 min18 May
Delhi07:57 → 09:3011:4448 min11:440 min18 May
Kolkata07:57 → 09:3011:0048 min11:000 min18 May
Singapore09:31 → 11:0411:3248 min11:320 min18 May
Sydney12:36 → 14:0911:270 min11:2748 min19 May
Suva14:31 → 16:0411:330 min11:3348 min19 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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