800
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 800 DCCC |
| Ab urbe condita | 1553 |
| Armenian calendar | 249 ԹՎ ՄԽԹ |
| Assyrian calendar | 5550 |
| Bengali calendar | 207 |
| Berber calendar | 1750 |
| Buddhist calendar | 1344 |
| Burmese calendar | 162 |
| Byzantine calendar | 6308–6309 |
| Chinese calendar |
己卯年 (Earth Rabbit) 3496 or 3436 — to — 庚辰年 (Metal Dragon) 3497 or 3437 |
| Coptic calendar | 516–517 |
| Discordian calendar | 1966 |
| Ethiopian calendar | 792–793 |
| Hebrew calendar | 4560–4561 |
| Hindu calendars | |
| - Vikram Samvat | 856–857 |
| - Shaka Samvat | 721–722 |
| - Kali Yuga | 3900–3901 |
| Holocene calendar | 10800 |
| Iranian calendar | 178–179 |
| Islamic calendar | 183–184 |
| Japanese calendar |
Enryaku 19 (延暦１９年) |
| Javanese calendar | 695–696 |
| Julian calendar | 800 DCCC |
| Korean calendar | 3133 |
| Minguo calendar | 1112 before ROC 民前1112年 |
| Nanakshahi calendar | −668 |
| Seleucid era | 1111/1112 AG |
| Thai solar calendar | 1342–1343 |
Year 800 (DCCC) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. It was around this time that the Anno Domini calendar era became the prevalent method in Europe for naming years, so from this time on, the years began to be known as 800 and onwards.
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