Ruling · Akhaṇḍa Dvādaśī · 2051

Thursday 14 December

Boundaryin Baoding, under the Rashtriya Panchang method. A threshold is only 2 min 39 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 14 December

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:49  12:37 madhyāhna ends
Dvādaśī begins 12:33:55
11:0111:2511:4912:1312:3713:0113:25

3 of 48 minutes covered, the last 3

Midday of Friday 15 December

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:49  12:37 madhyāhna ends
11:0111:2511:4912:1312:3713:0113:25

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 12:34 on Thu 14 Dec to 09:35 on Fri 15 Dec.

    2051-12-14T04:33:55Z → 2051-12-15T01:34:48Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:49–12:37 on the 14th, 11:49–12:37 on the 15th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Dvādaśī must be present during madhyāhna. It covers 3 of 48 minutes on the 14th and 0 of 48 on the 15th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: paraviddha → only-day · margin 159 s < 300 s

  5. 05

    Ruling

    Akhaṇḍa Dvādaśī, Baoding, 2051: Thursday 14 December.

    confidence: boundary (margin)

Say it like this

In Baoding, Akhaṇḍa Dvādaśī 2051 falls on Thursday 14 December. Dvādaśī runs from 12:34 on Thu 14 Dec to 09:35 on Fri 15 Dec and covers 3 of 48 minutes of madhyāhna that midday. It is 2 min 39 s from a threshold: treat the date as contested.

ahargana.org/baoding/festivals/2051/akhanda-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingThu 14 Dec
Ahargaṇa, classicalDisc centre, no refractionThu 14 Dec
compat-drikpanchangComparison profileThu 14 Dec
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/akhanda-dvadashi · ruleset 2026.3-draft

Month
Mārgaśīrṣa, amānta
Pakṣa · aṅga
Śukla · Dvādaśī
Kāla
Madhyāhna
Priority
Paraviddhā
Tie-break
Second day
Reference
CRC 1955, p. 104

“S 12 Matsya dvadasi, Akhanda dvadasi (paraviddha), Vyanjana dvadasi & Dana dvadasi (Orissa).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceDvādaśīMadhyāhna 14thCoveredMadhyāhna 15thCoveredRuled
Los Angeles20:34 → 17:3511:2448 min11:240 min14 Dec
Chicago22:34 → 19:3511:2148 min11:220 min14 Dec
Jersey City23:34 → 20:3511:2748 min11:270 min14 Dec
Port of Spain00:34 → 21:3511:3748 min11:370 min14 Dec
London04:34 → 01:3511:3148 min11:320 min14 Dec
Durban06:34 → 03:3511:2748 min11:270 min14 Dec
Dubai08:34 → 05:3511:4948 min11:500 min14 Dec
Delhi10:04 → 07:0511:5248 min11:520 min14 Dec
Kolkata10:04 → 07:0511:0748 min11:080 min14 Dec
Singapore12:34 → 09:3512:3548 min12:360 min14 Dec
Sydney15:34 → 12:3512:260 min12:269 min15 Dec
Suva16:34 → 13:3511:370 min11:3748 min15 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
akhanda-dvadashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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