| Millennium: | 1st millennium |
|---|---|
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 770s 780s 790s – 800s – 810s 820s 830s |
| Years: | 802 803 804 – 805 – 806 807 808 |
| 805 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 805 DCCCV |
| Ab urbe condita | 1558 |
| Armenian calendar | 254 ԹՎ ՄԾԴ |
| Bahá'í calendar | -1039 – -1038 |
| Bengali calendar | 212 |
| Berber calendar | 1755 |
| Buddhist calendar | 1349 |
| Burmese calendar | 167 |
| Byzantine calendar | 6313 – 6314 |
| Chinese calendar | 甲申年十一月廿七日 (3441/3501-11-27) — to —
乙酉年十二月初七日(3442/3502-12-7) |
| Coptic calendar | 521 – 522 |
| Ethiopian calendar | 797 – 798 |
| Hebrew calendar | 4565 – 4566 |
| Hindu calendars | |
| - Bikram Samwat | 861 – 862 |
| - Shaka Samvat | 727 – 728 |
| - Kali Yuga | 3906 – 3907 |
| Holocene calendar | 10805 |
| Iranian calendar | 183 – 184 |
| Islamic calendar | 189 – 190 |
| Japanese calendar | |
| Korean calendar | 3138 |
| Thai solar calendar | 1348 |