Ruling · Rukmiṇī Dvādaśī · 1948

Thursday 20 May

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 4 min 30 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 Wednesday 19 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 12:51  13:39 madhyāhna ends
12:0312:2712:5113:1513:3914:0314:27

0 of 48 minutes covered

Midday of Thursday 20 May

Taken. Dvādaśī reaches neither midday; the rule takes the second day.

madhyāhna begins 12:51  13:39 madhyāhna ends
Dvādaśī ends 12:46:17
12:0312:2712:5113:1513:3914:0314:27

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 14:29 on Wed 19 May to 12:46 on Thu 20 May.

    1948-05-19T05:29:10Z → 1948-05-20T03:46:17Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 12:51–13:39 on the 19th, 12:51–13:39 on the 20th.

    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 19th and 0 of 48 on the 20th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: purvaviddha → second-day · margin 270 s < 300 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Baoding, 1948: Thursday 20 May.

    confidence: boundary (margin)

Say it like this

In Baoding, Rukmiṇī Dvādaśī 1948 falls on Thursday 20 May. Dvādaśī runs from 14:29 on Wed 19 May to 12:46 on Thu 20 May, and reaches madhyāhna on neither day. It is 4 min 30 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1948/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 20 May
Ahargaṇa, classicalDisc centre, no refractionThu 20 May
compat-drikpanchangComparison profileWed 19 May
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 19thCoveredMadhyāhna 20thCoveredRuled
Los Angeles22:29 → 20:4612:2648 min12:260 min19 May
Chicago00:29 → 22:4612:2348 min12:230 min19 May
Jersey City01:29 → 23:4612:2948 min12:290 min19 May
Port of Spain01:29 → 23:4611:3848 min11:390 min19 May
London06:29 → 04:4612:3348 min12:330 min19 May
Durban07:29 → 05:4611:2848 min11:280 min19 May
Dubai09:29 → 07:4611:5148 min11:510 min19 May
Delhi10:59 → 09:1611:5448 min11:540 min19 May
Kolkata10:59 → 09:1611:0948 min11:090 min19 May
Singapore12:59 → 11:1612:070 min12:070 min20 May
Sydney15:29 → 13:4611:270 min11:2748 min20 May
Suva17:29 → 15:4611:390 min11:3948 min20 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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