| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 590s 600s 610s 620s 630s 640s 650s |
| Years: | 625 626 627 628 629 630 631 |
| 628 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 628 DCXXVIII |
| Ab urbe condita | 1381 |
| Armenian calendar | 77 ԹՎ ՀԷ |
| Bahá'í calendar | -1216 – -1215 |
| Bengali calendar | 35 |
| Berber calendar | 1578 |
| Buddhist calendar | 1172 |
| Burmese calendar | -10 |
| Byzantine calendar | 6136 – 6137 |
| Chinese calendar | 丁亥年十一月二十日 (3264/3324-11-20) — to —
戊子年十二月初一日(3265/3325-12-1) |
| Coptic calendar | 344 – 345 |
| Ethiopian calendar | 620 – 621 |
| Hebrew calendar | 4388 – 4389 |
| Hindu calendars | |
| - Bikram Samwat | 684 – 685 |
| - Shaka Samvat | 550 – 551 |
| - Kali Yuga | 3729 – 3730 |
| Holocene calendar | 10628 |
| Iranian calendar | 6 – 7 |
| Islamic calendar | 6 – 7 |
| Japanese calendar | |
| Korean calendar | 2961 |
| Thai solar calendar | 1171 |