| Millennium: | 1st millennium |
|---|---|
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 830s 840s 850s – 860s – 870s 880s 890s |
| Years: | 858 859 860 – 861 – 862 863 864 |
| 861 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 861 DCCCLXI |
| Ab urbe condita | 1614 |
| Armenian calendar | 310 ԹՎ ՅԺ |
| Bahá'í calendar | -983 – -982 |
| Bengali calendar | 268 |
| Berber calendar | 1811 |
| Buddhist calendar | 1405 |
| Burmese calendar | 223 |
| Byzantine calendar | 6369 – 6370 |
| Chinese calendar | 庚辰年十一月十七日 (3497/3557-11-17) — to —
辛巳年十一月廿六日(3498/3558-11-26) |
| Coptic calendar | 577 – 578 |
| Ethiopian calendar | 853 – 854 |
| Hebrew calendar | 4621 – 4622 |
| Hindu calendars | |
| - Bikram Samwat | 917 – 918 |
| - Shaka Samvat | 783 – 784 |
| - Kali Yuga | 3962 – 3963 |
| Holocene calendar | 10861 |
| Iranian calendar | 239 – 240 |
| Islamic calendar | 246 – 247 |
| Japanese calendar | |
| Korean calendar | 3194 |
| Thai solar calendar | 1404 |