October 4 – Heraclian revolt: Heraclius arrives with a fleet from AfricaatConstantinople. Assisted by an uprising in the capital, he overthrows and personally beheads Emperor Phocas. Heraclius gains the throne with help from his father Heraclius the Elder. His first major act is to change the official language of the Eastern Roman Empire from LatintoGreek (already the language of the vast majority of the population). Because of this, after AD 610, the Empire is customarily referred to as the Byzantine Empire (the term Byzantine is a modern term invented by historians in the 18th century; the people of the Empire itself always referred to themselves as『Ρωμαῖος』— tr. Rōmaios, Roman).
The Volga Bulgaria arises on the territory of modern Russia, being the first civilization in the region to arise from the Early Slavs (approximate date).
Muhammad, Islamic prophet, begins at 40 years old to preach a religion which will be called Islam. According to Islamic teachings, the angel Gabriel appears to him in a cave on Mount Hira near Mecca (Saudi Arabia) and calls him: "The Prophet of Allah". Muhammad gathers followers, reciting to them the first verses of Qur'an(Iqra), thus beginning the revelation of the Qur'an.[3]