Ruling · Rukmiṇī Dvādaśī · 2018

Thursday 26 April

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 13 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 Thursday 26 April

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:52  12:40 madhyāhna ends
Dvādaśī begins 11:50:06
11:0411:2811:5212:1612:4013:0413:28

48 of 48 minutes covered

Midday of Friday 27 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

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

How it was decided

  1. 01

    Aṅga

    Dvādaśī runs from 11:50 on Thu 26 Apr to 10:38 on Fri 27 Apr.

    2018-04-26T03:50:07Z → 2018-04-27T02:37:42Z

  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 48 of 48 minutes on the 26th and 0 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 133 s < 300 s

  5. 05

    Ruling

    Rukmiṇī Dvādaśī, Baoding, 2018: Thursday 26 April.

    confidence: boundary (margin)

Say it like this

In Baoding, Rukmiṇī Dvādaśī 2018 falls on Thursday 26 April. Dvādaśī runs from 11:50 on Thu 26 Apr to 10:38 on Fri 27 Apr and covers all of madhyāhna that midday. It is 2 min 13 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2018/rukmini-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 26 Apr
Ahargaṇa, classicalDisc centre, no refractionThu 26 Apr
compat-drikpanchangComparison profileThu 26 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 Angeles20:50 → 19:3812:2748 min12:270 min26 Apr
Chicago22:50 → 21:3812:2548 min12:250 min26 Apr
Jersey City23:50 → 22:3812:3048 min12:300 min26 Apr
Port of Spain23:50 → 22:3811:4048 min11:400 min26 Apr
London04:50 → 03:3812:3548 min12:350 min26 Apr
Durban05:50 → 04:3811:3048 min11:290 min26 Apr
Dubai07:50 → 06:3811:5348 min11:530 min26 Apr
Delhi09:20 → 08:0811:5548 min11:550 min26 Apr
Kolkata09:20 → 08:0811:1148 min11:100 min26 Apr
Singapore11:50 → 10:3812:3848 min12:380 min26 Apr
Sydney13:50 → 12:3811:290 min11:2948 min27 Apr
Suva15:50 → 14:3811:400 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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