| Centuries: | 8th century - 9th century - 10th century |
| Decades: | 840s 850s 860s - 870s - 880s 890s 900s |
| Years: | 870 871 872 - 873 - 874 875 876 |
| 873 by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishment and disestablishment categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 873 DCCCLXXIII |
| Ab urbe condita | 1626 |
| Armenian calendar | 322 ԹՎ ՅԻԲ |
| Bahá'í calendar | -971 – -970 |
| Berber calendar | 1823 |
| Buddhist calendar | 1417 |
| Burmese calendar | 235 |
| Chinese calendar | 3509/3569-11-29 (壬辰年十一月廿九日) — to —
3510/3570-12-8(癸巳年十二月初八日) |
| Coptic calendar | 589 – 590 |
| Ethiopian calendar | 865 – 866 |
| Hebrew calendar | 4633 – 4634 |
| Hindu calendars | |
| - Vikram Samvat | 928 – 929 |
| - Shaka Samvat | 795 – 796 |
| - Kali Yuga | 3974 – 3975 |
| Holocene calendar | 10873 |
| Iranian calendar | 251 – 252 |
| Islamic calendar | 259 – 260 |
| Japanese calendar | |
| Korean calendar | 3206 |
| Thai solar calendar | 1416 |