| Millennium: | 1st millennium |
| Centuries: | 6th century – 7th century – 8th century |
| Decades: | 590s 600s 610s – 620s – 630s 640s 650s |
| Years: | 620 621 622 623 624 625 626 627 628 629 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
The 620s decade ran from January 1, 680, to December 31, 629.
Events and trends
- 627—The Roman-Persian Wars end.
- 622—Year one of the Islamic calendar begins, during which the Hijra occurs—Muhammad and his followers emigrate from Mecca to Medina in September.
- 629, The Byzantine-Arab Wars begin. Much of the Roman Empire is conquered by Muslim Arabs led by Khalid ibn al-Walid.
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