678
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6th century |
7th century 
| 8th century 
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640er |
650s |
660s |
670s 
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674 |
675 |
676 |
677 |
678 
| 679 
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Calendar overview 678
| 678 | |
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The Arabs under Muʿāwiya I broke off the  siege of Constantinople after four years.  | 
|
| 678 in other calendars | |
| Armenian calendar | 126/127 (turn of the year July) | 
| Ethiopian calendar | 670/671 | 
| Buddhist calendar | 1221/22 (southern Buddhism); 1220/21 (alternative calculation according to Buddha's Parinirvana ) | 
| Chinese calendar | 56th (57th) cycle
 Year of the Earth Tiger戊寅 ( at the beginning of the year Fire Ox 丁丑)  | 
| Chula Sakarat (Siam, Myanmar) / Dai calendar (Vietnam) | 40/41 (turn of the year April) | 
| Iranian calendar | 56/57 (turn of the year March) | 
| Islamic calendar | 58/59 (turn of the year 22/23 October) | 
| Jewish calendar | 4438/39 (September 22/23) | 
| Coptic calendar | 394/395 | 
| Roman calendar | 
from urbe condita  MCDXXXI (1431)
 Diocletian's era : 394/395 (turn of the year November)  | 
| Seleucid era | Babylon: 988/989 (April)
 Syria: 989/990 (October)  | 
| Spanish era | 716 | 
| Vikram Sambat (Nepalese Calendar) | 734/735 (turn of the year April) | 
Events
Politics and world events
- Islamic expansion : The four-year siege of Constantinople by the Muslims fails when their fleet is destroyed by the use of the Greek fire (first traditional operation).
 - The Franconian caretaker Ebroin defeats his Austrasian opponents at Bois-du-Fay.
 
religion
- June 27th : Agatho becomes Pope (allegedly at the age of 100) to succeed Donus .
 - Bosa becomes Bishop of York , succeeding Wilfrid .
 
Born
- September 13 : K'inich Ahkal Mo 'Nahb III. , Ruler of the Maya city of Palenque († after 736)
 - 678/ 679 : Childebert III. , Merovingian Frankish King († 711 )
 
Died
- April 11th : Donus , Pope
 - Aisha , wife of the Prophet Mohammed (* 613 / 614 )