Ruling · Akhaṇḍa Dvādaśī · 1980

Friday 19 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 51 minutes.

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 18 December

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 Friday 19 December

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

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

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 13:30 on Thu 18 Dec to 10:34 on Fri 19 Dec.

    1980-12-18T05:30:10Z → 1980-12-19T02:33:42Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:51–12:39 on the 18th, 11:51–12:39 on the 19th.

    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 18th and 0 of 48 on the 19th.

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

  4. 04

    Tie-break

    Neither midday qualifies. The rule takes the second day.

    priority: paraviddha → second-day · margin 3085 s

  5. 05

    Ruling

    Akhaṇḍa Dvādaśī, Baoding, 1980: Friday 19 December.

    confidence: determinate

Say it like this

In Baoding, Akhaṇḍa Dvādaśī 1980 falls on Friday 19 December. Dvādaśī runs from 13:30 on Thu 18 Dec to 10:34 on Fri 19 Dec, and reaches madhyāhna on neither day.

ahargana.org/baoding/festivals/1980/akhanda-dvadashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingFri 19 Dec
Ahargaṇa, classicalDisc centre, no refractionFri 19 Dec
compat-drikpanchangComparison profileFri 19 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 18thCoveredMadhyāhna 19thCoveredRuled
Los Angeles21:30 → 18:3411:2648 min11:260 min18 Dec
Chicago23:30 → 20:3411:2348 min11:240 min18 Dec
Jersey City00:30 → 21:3411:2948 min11:300 min18 Dec
Port of Spain01:30 → 22:3411:3948 min11:390 min18 Dec
London05:30 → 02:3411:3348 min11:340 min18 Dec
Durban07:30 → 04:3411:2948 min11:290 min18 Dec
Dubai09:30 → 06:3411:5148 min11:520 min18 Dec
Delhi11:00 → 08:0411:5448 min11:540 min18 Dec
Kolkata11:00 → 08:0411:0948 min11:100 min18 Dec
Singapore13:00 → 10:0412:070 min12:080 min19 Dec
Sydney16:30 → 13:3412:280 min12:2848 min19 Dec
Suva17:30 → 14:3411:390 min11:3948 min19 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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