| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 815 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 815 DCCCXV |
| Ab urbe condita | 1568 |
| Armenian calendar | 264 ԹՎ ՄԿԴ |
| Assyrian calendar | 5565 |
| Balinese saka calendar | 736–737 |
| Bengali calendar | 222 |
| Berber calendar | 1765 |
| Buddhist calendar | 1359 |
| Burmese calendar | 177 |
| Byzantine calendar | 6323–6324 |
| Chinese calendar | 甲午年 (Wood Horse) 3512 or 3305 — to — 乙未年 (Wood Goat) 3513 or 3306 |
| Coptic calendar | 531–532 |
| Discordian calendar | 1981 |
| Ethiopian calendar | 807–808 |
| Hebrew calendar | 4575–4576 |
| Hindu calendars | |
| - Vikram Samvat | 871–872 |
| - Shaka Samvat | 736–737 |
| - Kali Yuga | 3915–3916 |
| Holocene calendar | 10815 |
| Iranian calendar | 193–194 |
| Islamic calendar | 199–200 |
| Japanese calendar | Kōnin 6 (弘仁６年) |
| Javanese calendar | 711–712 |
| Julian calendar | 815 DCCCXV |
| Korean calendar | 3148 |
| Minguo calendar | 1097 before ROC 民前1097年 |
| Nanakshahi calendar | −653 |
| Seleucid era | 1126/1127 AG |
| Thai solar calendar | 1357–1358 |
| Tibetan calendar | 阳木马年 (male Wood-Horse) 941 or 560 or −212 — to — 阴木羊年 (female Wood-Goat) 942 or 561 or −211 |
Year 815 (DCCCXV) was a common year starting on Monday (link will display the full calendar) of the Julian calendar, the 815th year of the Common Era (CE) and Anno Domini (AD) designations, the 815th year of the 1st millennium, the 15th year of the 9th century, and the 6th year of the 810s decade.