1812
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| Millennium |
| 2nd millennium |
| Centuries |
| Decades |
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| 1812 by topic |
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| Arts, history, and science |
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| Countries |
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| Lists of leaders |
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| Birth and death categories |
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| Establishments and disestablishments categories |
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| Works category |
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| Gregorian calendar | 1812 MDCCCXII |
| Ab urbe condita | 2565 |
| Armenian calendar | 1261 ԹՎ ՌՄԿԱ |
| Assyrian calendar | 6562 |
| Balinese saka calendar | 1733–1734 |
| Bengali calendar | 1219 |
| Berber calendar | 2762 |
| British Regnal year | 52 Geo. 3 – 53 Geo. 3 |
| Buddhist calendar | 2356 |
| Burmese calendar | 1174 |
| Byzantine calendar | 7320–7321 |
| Chinese calendar | 辛未年 (Metal Goat) 4508 or 4448 — to — 壬申年 (Water Monkey) 4509 or 4449 |
| Coptic calendar | 1528–1529 |
| Discordian calendar | 2978 |
| Ethiopian calendar | 1804–1805 |
| Hebrew calendar | 5572–5573 |
| Hindu calendars | |
| - Vikram Samvat | 1868–1869 |
| - Shaka Samvat | 1733–1734 |
| - Kali Yuga | 4912–4913 |
| Holocene calendar | 11812 |
| Igbo calendar | 812–813 |
| Iranian calendar | 1190–1191 |
| Islamic calendar | 1226–1227 |
| Japanese calendar | Bunka 9 (文化９年) |
| Javanese calendar | 1738–1739 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4145 |
| Minguo calendar | 100 before ROC 民前100年 |
| Nanakshahi calendar | 344 |
| Thai solar calendar | 2354–2355 |
| Tibetan calendar | ལྕགས་མོ་ལུག་ལོ་ (female Iron-Sheep) 1938 or 1557 or 785 — to — ཆུ་ཕོ་སྤྲེ་ལོ་ (male Water-Monkey) 1939 or 1558 or 786 |
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1812 (MDCCCXII) was a leap year starting on Wednesday in the Gregorian calendar and a leap year starting on Monday in the Julian calendar.
Events
- March 5 – Prussia and France sign the Treaty of Paris
- March 26 – The 1812 Caracas earthquake destroys Caracas in Venezuela.
- April 30 – Louisiana is admitted as the 18th U.S. state.
- June 18 – The War of 1812 between the United States, Canada and the United Kingdom begins.
- December 30 – Convention of Tauroggen is signed.
- The capital of Finland is moved from Turku to Helsinki.
Births
- for more information, see Category:1812 births.
Deaths
- for more information, see Category:1812 deaths.