| Millennium: | 2nd Millennium |
|---|---|
| Centuries: | 18th cent. – 19th cent. – 20th cent. |
| Decades: | 1780s 1790s 1800s – 1810s – 1820s 1830s 1840s |
| Years: | 1812 1813 1814 – 1815 – 1816 1817 1818 |
| Gregorian calendar | 1815 MDCCCXV |
| Ab urbe condita | 2568 |
| Armenian calendar | 1264 ԹՎ ՌՄԿԴ |
| Assyrian calendar | 6565 |
| Bengali calendar | 1222 |
| Berber calendar | 2765 |
| British Regnal year | 55 Geo. 3 – 56 Geo. 3 |
| Buddhist calendar | 2359 |
| Burmese calendar | 1177 |
| Byzantine calendar | 7323–7324 |
| Chinese calendar | 甲戌年 (Wood Dog) 4511 or 4451 — to — 乙亥年 (Wood Pig) 4512 or 4452 |
| Coptic calendar | 1531–1532 |
| Discordian calendar | 2981 |
| Ethiopian calendar | 1807–1808 |
| Hebrew calendar | 5575–5576 |
| Hindu calendars | |
| - Vikram Samvat | 1871–1872 |
| - Shaka Samvat | 1736–1737 |
| - Kali Yuga | 4915–4916 |
| Holocene calendar | 11815 |
| Igbo calendar | 815–816 |
| Iranian calendar | 1193–1194 |
| Islamic calendar | 1230–1231 |
| Japanese calendar | Bunka 12 (文化１２年) |
| Javanese calendar | 1741–1742 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4148 |
| Minguo calendar | 97 before ROC 民前97年 |
| Nanakshahi calendar | 347 |
| Thai solar calendar | 2357–2358 |
The year 1815 BC
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