| Millennium: | 1st millennium |
|---|---|
| Centuries: | 6th century – 7th century – 8th century |
| Decades: | 650s 660s 670s – 680s – 690s 700s 710s |
| Years: | 685 686 687 – 688 – 689 690 691 |
| 688 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 688 DCLXXXVIII |
| Ab urbe condita | 1441 |
| Armenian calendar | 137 ԹՎ ՃԼԷ |
| Bahá'í calendar | -1156 – -1155 |
| Bengali calendar | 95 |
| Berber calendar | 1638 |
| Buddhist calendar | 1232 |
| Burmese calendar | 50 |
| Byzantine calendar | 6196 – 6197 |
| Chinese calendar | 丁亥年十一月廿三日 (3324/3384-11-23) — to —
戊子年十二月初四日(3325/3385-12-4) |
| Coptic calendar | 404 – 405 |
| Ethiopian calendar | 680 – 681 |
| Hebrew calendar | 4448 – 4449 |
| Hindu calendars | |
| - Bikram Samwat | 744 – 745 |
| - Shaka Samvat | 610 – 611 |
| - Kali Yuga | 3789 – 3790 |
| Holocene calendar | 10688 |
| Iranian calendar | 66 – 67 |
| Islamic calendar | 68 – 69 |
| Japanese calendar | |
| Korean calendar | 3021 |
| Thai solar calendar | 1231 |