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Millennium |
2nd millennium |
Centuries |
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1840 by topic |
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Humanities |
By country |
Other topics |
Lists of leaders |
Birth and death categories |
Establishments and disestablishments categories |
Works category |
1840 (MDCCCXL) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1840th year of the Common Era (CE) and Anno Domini (AD) designations, the 840th year of the 2nd millennium, the 40th year of the 19th century, and the 1st year of the 1840s decade. As of the start of 1840, the Gregorian calendar was 12days ahead of the Julian calendar, which remained in localized use until 1923.