Ruling · Rukmiṇī Dvādaśī · 1957

Saturday 11 May

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 17 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 Friday 10 May

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:51  12:39 madhyāhna ends
11:0311:2711:5112:1512:3913:0313:27

0 of 48 minutes covered

Midday of Saturday 11 May

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:51  12:39 madhyāhna ends
Dvādaśī ends 11:53:01
11:0311:2711:5112:1512:3913:0313:27

2 of 48 minutes covered, the first 2

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 14:10 on Fri 10 May to 11:53 on Sat 11 May.

    1957-05-10T06:10:18Z → 1957-05-11T03:53:01Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 10th, 11:51–12:39 on the 11th.

    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 10th and 2 of 48 on the 11th.

    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 137 s < 300 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Baoding, 1957: Saturday 11 May.

    confidence: boundary (margin)

Say it like this

In Baoding, Rukmiṇī Dvādaśī 1957 falls on Saturday 11 May. Dvādaśī runs from 14:10 on Fri 10 May to 11:53 on Sat 11 May and covers 2 of 48 minutes of madhyāhna that midday. It is 2 min 17 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/1957/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 11 May
Ahargaṇa, classicalDisc centre, no refractionSat 11 May
compat-drikpanchangComparison profileSat 11 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 10thCoveredMadhyāhna 11thCoveredRuled
Los Angeles23:10 → 20:5312:2648 min12:250 min10 May
Chicago01:10 → 22:5312:2348 min12:230 min10 May
Jersey City02:10 → 23:5312:2948 min12:290 min10 May
Port of Spain02:10 → 23:5311:3848 min11:380 min10 May
London07:10 → 04:5312:3348 min12:330 min10 May
Durban08:10 → 05:5311:2848 min11:280 min10 May
Dubai10:10 → 07:5311:5148 min11:510 min10 May
Delhi11:40 → 09:2311:5448 min11:540 min10 May
Kolkata11:40 → 09:2311:0917 min11:090 min10 May
Singapore13:40 → 11:2312:070 min12:070 min11 May
Sydney16:10 → 13:5311:270 min11:2748 min11 May
Suva18:10 → 15:5311:390 min11:3948 min11 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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