1812

Millennium: 2nd millennium
Centuries:
Decades:
Years:
1812 in various calendars
Gregorian calendar1812
MDCCCXII
Ab urbe condita2565
Armenian calendar1261
ԹՎ ՌՄԿԱ
Assyrian calendar6562
Balinese saka calendar1733–1734
Bengali calendar1219
Berber calendar2762
British Regnal year52 Geo. 3 – 53 Geo. 3
Buddhist calendar2356
Burmese calendar1174
Byzantine calendar7320–7321
Chinese calendar辛未年 (Metal Goat)
4509 or 4302
    — to —
壬申年 (Water Monkey)
4510 or 4303
Coptic calendar1528–1529
Discordian calendar2978
Ethiopian calendar1804–1805
Hebrew calendar5572–5573
Hindu calendars
 - Vikram Samvat1868–1869
 - Shaka Samvat1733–1734
 - Kali Yuga4912–4913
Holocene calendar11812
Igbo calendar812–813
Iranian calendar1190–1191
Islamic calendar1226–1227
Japanese calendarBunka 9
(文化9年)
Javanese calendar1738–1739
Julian calendarGregorian minus 12 days
Korean calendar4145
Minguo calendar100 before ROC
民前100年
Nanakshahi calendar344
Thai solar calendar2354–2355
Tibetan calendar阴金羊年
(female Iron-Goat)
1938 or 1557 or 785
    — to —
阳水猴年
(male Water-Monkey)
1939 or 1558 or 786
March 16April 6: Siege of Badajoz

1812 (MDCCCXII) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1812th year of the Common Era (CE) and Anno Domini (AD) designations, the 812th year of the 2nd millennium, the 12th year of the 19th century, and the 3rd year of the 1810s decade. As of the start of 1812, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.