| Millennium: | 1st millennium |
|---|---|
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 820s 830s 840s – 850s – 860s 870s 880s |
| Years: | 852 853 854 – 855 – 856 857 858 |
| 855 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 855 DCCCLV |
| Ab urbe condita | 1608 |
| Armenian calendar | 304 ԹՎ ՅԴ |
| Bahá'í calendar | -989 – -988 |
| Bengali calendar | 262 |
| Berber calendar | 1805 |
| Buddhist calendar | 1399 |
| Burmese calendar | 217 |
| Byzantine calendar | 6363 – 6364 |
| Chinese calendar | 甲戌年十二月初九日 (3491/3551-12-9) — to —
乙亥年十一月十九日(3492/3552-11-19) |
| Coptic calendar | 571 – 572 |
| Ethiopian calendar | 847 – 848 |
| Hebrew calendar | 4615 – 4616 |
| Hindu calendars | |
| - Bikram Samwat | 911 – 912 |
| - Shaka Samvat | 777 – 778 |
| - Kali Yuga | 3956 – 3957 |
| Holocene calendar | 10855 |
| Iranian calendar | 233 – 234 |
| Islamic calendar | 240 – 241 |
| Japanese calendar | |
| Korean calendar | 3188 |
| Thai solar calendar | 1398 |