| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 630s 640s 650s 660s 670s 680s 690s |
| Years: | 660 661 662 663 664 665 666 |
| 663 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 663 DCLXIII |
| Ab urbe condita | 1416 |
| Armenian calendar | 112 ԹՎ ՃԺԲ |
| Bahá'í calendar | -1181 – -1180 |
| Bengali calendar | 70 |
| Berber calendar | 1613 |
| Buddhist calendar | 1207 |
| Burmese calendar | 25 |
| Byzantine calendar | 6171 – 6172 |
| Chinese calendar | 壬戌年十一月十七日 (3299/3359-11-17) — to —
癸亥年十一月廿七日(3300/3360-11-27) |
| Coptic calendar | 379 – 380 |
| Ethiopian calendar | 655 – 656 |
| Hebrew calendar | 4423 – 4424 |
| Hindu calendars | |
| - Bikram Samwat | 719 – 720 |
| - Shaka Samvat | 585 – 586 |
| - Kali Yuga | 3764 – 3765 |
| Holocene calendar | 10663 |
| Iranian calendar | 41 – 42 |
| Islamic calendar | 42 – 43 |
| Japanese calendar | |
| Korean calendar | 2996 |
| Thai solar calendar | 1206 |