| Millennium: | 1st millennium |
|---|---|
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 830s 840s 850s – 860s – 870s 880s 890s |
| Years: | 862 863 864 – 865 – 866 867 868 |
| 865 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 865 DCCCLXV |
| Ab urbe condita | 1618 |
| Armenian calendar | 314 ԹՎ ՅԺԴ |
| Bahá'í calendar | -979 – -978 |
| Bengali calendar | 272 |
| Berber calendar | 1815 |
| Buddhist calendar | 1409 |
| Burmese calendar | 227 |
| Byzantine calendar | 6373 – 6374 |
| Chinese calendar | 甲申年十一月三十日 (3501/3561-11-30) — to —
乙酉年十二月初十日(3502/3562-12-10) |
| Coptic calendar | 581 – 582 |
| Ethiopian calendar | 857 – 858 |
| Hebrew calendar | 4625 – 4626 |
| Hindu calendars | |
| - Bikram Samwat | 921 – 922 |
| - Shaka Samvat | 787 – 788 |
| - Kali Yuga | 3966 – 3967 |
| Holocene calendar | 10865 |
| Iranian calendar | 243 – 244 |
| Islamic calendar | 250 – 251 |
| Japanese calendar | |
| Korean calendar | 3198 |
| Thai solar calendar | 1408 |