Year 608 (DCVIII) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 608 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
|Ab urbe condita||1361|
|Balinese saka calendar||529–530|
|Chinese calendar||丁卯年 (Fire Rabbit)|
3304 or 3244
— to —
戊辰年 (Earth Dragon)
3305 or 3245
|- Vikram Samvat||664–665|
|- Shaka Samvat||529–530|
|- Kali Yuga||3708–3709|
|Iranian calendar||14 BP – 13 BP|
|Islamic calendar||14 BH – 13 BH|
|Minguo calendar||1304 before ROC|
|Seleucid era||919/920 AG|
|Thai solar calendar||1150–1151|
734 or 353 or −419
— to —
735 or 354 or −418
- Heraclian revolt: Heraclius the Elder, exarch of Africa, and his son (also named Heraclius) revolt against Emperor Phocas, whose regime in Constantinople has become unpopular and violent.
- Heraclius proclaims himself and his son as consuls, claiming the imperial title—and mint coins with the two wearing the consular robes. Syria and Palaestina Prima revolt.
- Byzantine–Persian War: King Khosrau II invades Armenia, and raids deep into Anatolia through the Byzantine provinces of Cappadocia, Phrygia, Galatia, and Bithynia.
- August 1 – The Column of Phocas at Rome is dedicated in honour of Phocas. The Corinthian column has a height of 13.6 m (44 ft).
- Sui Dynasty Emperor Yang of Sui expresses the desire to control routes to the West, leading to two and a half centuries of Chinese military and trading activities in Central Asia.
- September 25 – Pope Boniface IV succeeds Boniface III, as the 67th pope of Rome.
- The observance of Halloween in the Roman Catholic Church is first recorded.
- The Georgian Orthodox Church returns to Chalcedonism (approximate date).