| Millennium: | 1st millennium |
|---|---|
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 790s 800s 810s – 820s – 830s 840s 850s |
| Years: | 823 824 825 – 826 – 827 828 829 |
| 826 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 826 DCCCXXVI |
| Ab urbe condita | 1579 |
| Armenian calendar | 275 ԹՎ ՄՀԵ |
| Bahá'í calendar | -1018 – -1017 |
| Bengali calendar | 233 |
| Berber calendar | 1776 |
| Buddhist calendar | 1370 |
| Burmese calendar | 188 |
| Byzantine calendar | 6334 – 6335 |
| Chinese calendar | 乙巳年十一月十九日 (3462/3522-11-19) — to —
丙午年十一月廿九日(3463/3523-11-29) |
| Coptic calendar | 542 – 543 |
| Ethiopian calendar | 818 – 819 |
| Hebrew calendar | 4586 – 4587 |
| Hindu calendars | |
| - Bikram Samwat | 882 – 883 |
| - Shaka Samvat | 748 – 749 |
| - Kali Yuga | 3927 – 3928 |
| Holocene calendar | 10826 |
| Iranian calendar | 204 – 205 |
| Islamic calendar | 210 – 211 |
| Japanese calendar | |
| Korean calendar | 3159 |
| Thai solar calendar | 1369 |