| Centuries: | 8th century - 9th century - 10th century |
| Decades: | 810s 820s 830s - 840s - 850s 860s 870s |
| Years: | 838 839 840 - 841 - 842 843 844 |
| 841 by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishment and disestablishment categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 841 DCCCXLI |
| Ab urbe condita | 1594 |
| Armenian calendar | 290 ԹՎ ՄՂ |
| Bahá'í calendar | -1003 – -1002 |
| Berber calendar | 1791 |
| Buddhist calendar | 1385 |
| Burmese calendar | 203 |
| Chinese calendar | 3477/3537-12-5 (庚申年十二月初五日) — to —
3478/3538-11-15(辛酉年十一月十五日) |
| Coptic calendar | 557 – 558 |
| Ethiopian calendar | 833 – 834 |
| Hebrew calendar | 4601 – 4602 |
| Hindu calendars | |
| - Vikram Samvat | 896 – 897 |
| - Shaka Samvat | 763 – 764 |
| - Kali Yuga | 3942 – 3943 |
| Holocene calendar | 10841 |
| Iranian calendar | 219 – 220 |
| Islamic calendar | 226 – 227 |
| Japanese calendar | |
| Korean calendar | 3174 |
| Thai solar calendar | 1384 |