1780

Centuries:	18th century 19th century
Decades:	1760s 1770s 1780s 1790s 1800s
Years:	1777 1778 1779 1780 1781 1782 1783
Categories:	Births - Deaths Establishments - Publications
Media:	1780 (Events)

1780 was a leap year of the Gregorian calendar and a leap year of the Julian calendar, the 1780th year of the Common Era (CE), the 80th year of the 18th century, and the 1st year of the 1780s decade. As of the start of 1780, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.