1800

Centuries:	18th century 19th century
Decades:	1780s 1790s 1800s 1810s 1820s
Years:	1797 1798 1799 1800 1801 1802 1803
Categories:	Births - Deaths Establishments - Publications
Media:	1800 (Events)

1800 was an exceptional common year of the Gregorian calendar and a leap year of the Julian calendar, the 1800th year of the Common Era (CE), the 100th and last year of the 18th century, and the 1st year of the 1800s decade. As of the start of 1800, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.