| Millennium: | 1st millennium |
|---|---|
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 770s 780s 790s – 800s – 810s 820s 830s |
| Years: | 798 799 800 – 801 – 802 803 804 |
| 801 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 801 DCCCI |
| Ab urbe condita | 1554 |
| Armenian calendar | 250 ԹՎ ՄԾ |
| Bahá'í calendar | -1043 – -1042 |
| Bengali calendar | 208 |
| Berber calendar | 1751 |
| Buddhist calendar | 1345 |
| Burmese calendar | 163 |
| Byzantine calendar | 6309 – 6310 |
| Chinese calendar | 庚辰年十二月十三日 (3437/3497-12-13) — to —
辛巳年十一月廿三日(3438/3498-11-23) |
| Coptic calendar | 517 – 518 |
| Ethiopian calendar | 793 – 794 |
| Hebrew calendar | 4561 – 4562 |
| Hindu calendars | |
| - Bikram Samwat | 857 – 858 |
| - Shaka Samvat | 723 – 724 |
| - Kali Yuga | 3902 – 3903 |
| Holocene calendar | 10801 |
| Iranian calendar | 179 – 180 |
| Islamic calendar | 184 – 185 |
| Japanese calendar | |
| Korean calendar | 3134 |
| Thai solar calendar | 1344 |