Ruling · Rukmiṇī Dvādaśī · 2037

Monday 27 April

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 38 s away. Say “contested”.

Decide it for

BaodingDelhiKolkataSingaporeSydneyJersey City

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Sunday 26 April

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:52  12:40 madhyāhna ends
11:0411:2811:5212:1612:4013:0413:28

0 of 48 minutes covered

Midday of Monday 27 April

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:52  12:40 madhyāhna ends
Dvādaśī ends 11:56:45
11:0411:2811:5212:1612:4013:0413:28

5 of 48 minutes covered, the first 5

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 14:58 on Sun 26 Apr to 11:57 on Mon 27 Apr.

    2037-04-26T06:57:41Z → 2037-04-27T03:56:45Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:52–12:40 on the 26th, 11:52–12:40 on the 27th.

    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 26th and 5 of 48 on the 27th.

    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 278 s < 300 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Baoding, 2037: Monday 27 April.

    confidence: boundary (margin)

Say it like this

In Baoding, Rukmiṇī Dvādaśī 2037 falls on Monday 27 April. Dvādaśī runs from 14:58 on Sun 26 Apr to 11:57 on Mon 27 Apr and covers 5 of 48 minutes of madhyāhna that midday. It is 4 min 38 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2037/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 27 Apr
Ahargaṇa, classicalDisc centre, no refractionMon 27 Apr
compat-drikpanchangComparison profileMon 27 Apr
No institution has a recorded ruling for Baoding.

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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles23:58 → 20:5712:2748 min12:270 min26 Apr
Chicago01:58 → 22:5712:2548 min12:250 min26 Apr
Jersey City02:58 → 23:5712:3048 min12:300 min26 Apr
Port of Spain02:58 → 23:5711:4048 min11:400 min26 Apr
London07:58 → 04:5712:3548 min12:350 min26 Apr
Durban08:58 → 05:5711:2948 min11:290 min26 Apr
Dubai10:58 → 07:5711:5348 min11:530 min26 Apr
Delhi12:28 → 09:2711:5515 min11:550 min26 Apr
Kolkata12:28 → 09:2711:110 min11:100 min27 Apr
Singapore14:58 → 11:5712:380 min12:380 min27 Apr
Sydney16:58 → 13:5711:290 min11:2948 min27 Apr
Suva18:58 → 15:5711:400 min11:4048 min27 Apr
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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