| 844 by topic |
| Politics |
| State leaders – Sovereign states |
| Birth and death categories |
| Births – Deaths |
| Establishment and disestablishment categories |
| Establishments – Disestablishments |
| Gregorian calendar | 844 DCCCXLIV |
| Ab urbe condita | 1597 |
| Armenian calendar | 293 ԹՎ ՄՂԳ |
| Bahá'í calendar | -1000 – -999 |
| Berber calendar | 1794 |
| Buddhist calendar | 1388 |
| Burmese calendar | 206 |
| Byzantine calendar | 6352 – 6353 |
| Chinese calendar | 癸亥年十二月初八日 (3480/3540-12-8) — to —
甲子年十一月十九日(3481/3541-11-19) |
| Coptic calendar | 560 – 561 |
| Ethiopian calendar | 836 – 837 |