| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 814 DCCCXIV |
| Ab urbe condita | 1567 |
| Armenian calendar | 263 ԹՎ ՄԿԳ |
| Assyrian calendar | 5564 |
| Bengali calendar | 221 |
| Berber calendar | 1764 |
| Buddhist calendar | 1358 |
| Burmese calendar | 176 |
| Byzantine calendar | 6322–6323 |
| Chinese calendar |
癸巳年 (Water Snake) 3510 or 3450 — to — 甲午年 (Wood Horse) 3511 or 3451 |
| Coptic calendar | 530–531 |
| Discordian calendar | 1980 |
| Ethiopian calendar | 806–807 |
| Hebrew calendar | 4574–4575 |
| Hindu calendars | |
| - Vikram Samvat | 870–871 |
| - Shaka Samvat | 735–736 |
| - Kali Yuga | 3914–3915 |
| Holocene calendar | 10814 |
| Iranian calendar | 192–193 |
| Islamic calendar | 198–199 |
| Japanese calendar |
Kōnin 5 (弘仁5年) |
| Javanese calendar | 710–711 |
| Julian calendar | 814 DCCCXIV |
| Korean calendar | 3147 |
| Minguo calendar | 1098 before ROC 民前1098年 |
| Nanakshahi calendar | −654 |
| Seleucid era | 1125/1126 AG |
| Thai solar calendar | 1356–1357 |
Year 814 (DCCCXIV) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar.