| Centuries: | 8th century - 9th century - 10th century |
| Decades: | 820s 830s 840s - 850s - 860s 870s 880s |
| Years: | 856 857 858 - 859 - 860 861 862 |
| 859 by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishment and disestablishment categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 859 DCCCLIX |
| Ab urbe condita | 1612 |
| Armenian calendar | 308 ԹՎ ՅԸ |
| Bahá'í calendar | -985 – -984 |
| Berber calendar | 1809 |
| Buddhist calendar | 1403 |
| Burmese calendar | 221 |
| Chinese calendar | 3495/3555-11-24 (戊寅年十一月廿四日) — to —
3496/3556-12-4(己卯年十二月初四日) |
| Coptic calendar | 575 – 576 |
| Ethiopian calendar | 851 – 852 |
| Hebrew calendar | 4619 – 4620 |
| Hindu calendars | |
| - Vikram Samvat | 914 – 915 |
| - Shaka Samvat | 781 – 782 |
| - Kali Yuga | 3960 – 3961 |
| Holocene calendar | 10859 |
| Iranian calendar | 237 – 238 |
| Islamic calendar | 244 – 245 |
| Japanese calendar | |
| Korean calendar | 3192 |
| Thai solar calendar | 1402 |