| Centuries: | 6th century · 7th century · 8th century |
| Decades: | 630s 640s 650s 660s 670s 680s 690s |
| Years: | 666 667 668 669 670 671 672 |
| 669 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 669 DCLXIX |
| Ab urbe condita | 1422 |
| Armenian calendar | 118 ԹՎ ՃԺԸ |
| Bahá'í calendar | -1175 – -1174 |
| Bengali calendar | 76 |
| Berber calendar | 1619 |
| Buddhist calendar | 1213 |
| Burmese calendar | 31 |
| Byzantine calendar | 6177 – 6178 |
| Chinese calendar | 戊辰年十一月廿四日 (3305/3365-11-24) — to —
己巳年十二月初三日(3306/3366-12-3) |
| Coptic calendar | 385 – 386 |
| Ethiopian calendar | 661 – 662 |
| Hebrew calendar | 4429 – 4430 |
| Hindu calendars | |
| - Bikram Samwat | 725 – 726 |
| - Shaka Samvat | 591 – 592 |
| - Kali Yuga | 3770 – 3771 |
| Holocene calendar | 10669 |
| Iranian calendar | 47 – 48 |
| Islamic calendar | 48 – 49 |
| Japanese calendar | |
| Korean calendar | 3002 |
| Thai solar calendar | 1212 |