December 2002 · each Moon as it stands at sunriseKārtika Kṛṣṇa to Mārgaśīrṣa KṛṣṇaThe month ›

Ruling · 2002 · Tehran

Akhaṇḍa Dvādaśī

Monday 16 December2002 · Tehran, Iran

Determinatemargin 220 min

In Tehran, under the Rashtriya Panchang method. Clear of every threshold by 220 minutes.

Decide it forTehranDelhiKolkataSingaporeSydneyJersey City35°42′ N 51°25′ E · Asia/Tehran · GeoNames 112931

The two middays मध्याह्न

One ghaṭī is 24 minutes

Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Sunday 15 December

Dvādaśī is absent from madhyāhna. Not taken.

madhyāhna begins 11:35  12:23 madhyāhna ends
10:4711:1111:3511:5912:2312:4713:11

0 of 48 minutes covered

Midday of Monday 16 December

Taken. The only midday Dvādaśī reaches.

madhyāhna begins 11:36  12:24 madhyāhna ends
10:4811:1211:3612:0012:2412:4813:12

48 of 48 minutes covered

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

How it was decided निर्णय

  1. Step 1, Aṅga

    Dvādaśī runs from 16:03 on Sun 15 Dec to 18:22 on Mon 16 Dec.

    2002-12-15T12:32:49Z → 2002-12-16T14:52:25Z
  2. Step 2, Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:35–12:23 on the 15th, 11:36–12:24 on the 16th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
  3. Step 3, Rule

    Dvādaśī must be present during madhyāhna. It covers 0 of 48 minutes on the 15th and 48 of 48 on the 16th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104
  4. Step 4, Tie-break

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

    priority: paraviddha → only-day · margin 13172 s
  5. Step 5, Ruling

    Akhaṇḍa Dvādaśī, Tehran, 2002: Monday 16 December.

    confidence: determinate

Say it like this

In Tehran, Akhaṇḍa Dvādaśī 2002 falls on Monday 16 December. Dvādaśī runs from 16:03 on Sun 15 Dec to 18:22 on Mon 16 Dec and covers all of madhyāhna that midday.

ahargana.org/tehran/festivals/2002/akhanda-dvadashipac-rp@2026.1

Who says what

never edited to agree

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 16 Dec
Ahargaṇa, classicalDisc centre, no refractionMon 16 Dec
compat-drikpanchangComparison profileMon 16 Dec
No institution has a recorded ruling for Tehran.

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 clocks

PlaceDvādaśīMadhyāhna 15thCoveredMadhyāhna 16thCoveredRuled
Los Angeles04:33 → 06:5211:2448 min11:250 min15 Dec
Chicago06:33 → 08:5211:2248 min11:220 min15 Dec
Jersey City07:33 → 09:5211:2748 min11:280 min15 Dec
Port of Spain08:33 → 10:5211:3748 min11:380 min15 Dec
London12:33 → 14:5211:320 min11:3248 min16 Dec
Durban14:33 → 16:5211:270 min11:2748 min16 Dec
Dubai16:33 → 18:5211:500 min11:5048 min16 Dec
Delhi18:03 → 20:2211:520 min11:5348 min16 Dec
Kolkata18:03 → 20:2211:070 min11:0848 min16 Dec
Singapore20:33 → 22:5212:360 min12:3648 min16 Dec
Sydney23:33 → 01:5212:260 min12:2748 min16 Dec
Suva00:33 → 02:5211:370 min11:3848 min16 Dec
This ruling as JSON · ICS
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