Ruling · Akhaṇḍa Dvādaśī · 2039

Tuesday 27 December

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 31 minutes.

Decide it for

DaqingDelhiKolkataSingaporeSydneyJersey City

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

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

Midday of Monday 26 December

Qualifies with 48 of 48 minutes. Not taken.

madhyāhna begins 11:16  12:04 madhyāhna ends
10:2810:5211:1611:4012:0412:2812:52

48 of 48 minutes covered

Midday of Tuesday 27 December

Taken. Both middays qualify; the rule takes the second.

madhyāhna begins 11:17  12:05 madhyāhna ends
Dvādaśī ends 12:35:51
10:2910:5311:1711:4112:0512:2912:53

48 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 10:14 on Mon 26 Dec to 12:36 on Tue 27 Dec.

    2039-12-26T02:13:32Z → 2039-12-27T04:35:51Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:16–12:04 on the 26th, 11:17–12:05 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 48 of 48 on the 27th.

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

  4. 04

    Tie-break

    Both middays qualify. Paraviddhā: the second is taken.

    priority: paraviddha → paraviddha · margin 1861 s

  5. 05

    Ruling

    Akhaṇḍa Dvādaśī, Daqing, 2039: Tuesday 27 December.

    confidence: determinate

Say it like this

In Daqing, Akhaṇḍa Dvādaśī 2039 falls on Tuesday 27 December. Dvādaśī runs from 10:14 on Mon 26 Dec to 12:36 on Tue 27 Dec and covers all of madhyāhna that midday. It also reaches the previous midday for 48 minutes; by the rule the second midday is taken.

ahargana.org/daqing/festivals/2039/akhanda-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 27 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 27 Dec
compat-drikpanchangComparison profileTue 27 Dec
No institution has a recorded ruling for Daqing.

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 26thCoveredMadhyāhna 27thCoveredRuled
Los Angeles18:14 → 20:3611:3048 min11:300 min26 Dec
Chicago20:14 → 22:3611:2748 min11:280 min26 Dec
Jersey City21:14 → 23:3611:3348 min11:330 min26 Dec
Port of Spain22:14 → 00:3611:4348 min11:430 min26 Dec
London02:14 → 04:3611:3748 min11:380 min26 Dec
Durban04:14 → 06:3611:3248 min11:330 min26 Dec
Dubai06:14 → 08:3611:5548 min11:560 min26 Dec
Delhi07:44 → 10:0611:5748 min11:580 min26 Dec
Kolkata07:44 → 10:0611:1348 min11:130 min26 Dec
Singapore10:14 → 12:3612:4148 min12:410 min26 Dec
Sydney13:14 → 15:3612:316 min12:3248 min27 Dec
Suva14:14 → 16:3611:430 min11:4348 min27 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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