1780 in History
January 3 Danish national anthem "Kong Kristian...," 1st sung
January 4 Snowstorm hit Washington's army at Morristown, New Jersey
January 15 Continental Congress establishes court of appeals
January 16 Battle at Cape St. Vincent: Admiral Rodney beats Spanish fleet
March 1 Pennsylvania becomes 1st U.S. state to abolish slavery (for new-borns only)
March 26 1st British Sunday newspaper appears (British Gazette and Sunday Monitor)
May 2 William Herschel discovers 1st binary star, Xi Ursae Majoris
May 4 American Academy of Arts and Science founded
May 4 Charles Bunbury on Diomed wins 1st Epsom Derby
May 5 2nd oldest learned society in U.S. (American Academy of Arts and Sciences) forms (Boston)
May 12 British troops occupy Charleston, South Carolina
May 12 Charleston, South Carolina falls to British (Revolutionary War)
May 19 About midday, near-total darkness descends on much of New England to this day it's cause is still unexplained
June 2 Anti Catholic demonstration attacks parliament in London
June 7 Anti-Catholic riot in London, 100s die
July 9 Denmark declares neutrality
August 1 Sweden declares neutrality
August 11 Barbados hurricane begins
August 16 British decisively defeat Americans in Battle of Camden, SC
August 22 Resolution, without Captain Cook, returns to England
September 21 Benedict Arnold gives British Major Andre plans to West Point
September 23 British Major John Andre reveals Benedict Arnold's plot to betray West Pt
September 25 Benedict Arnold joins the British
October 7 British defeated by American militia near Kings Mountain, SC
October 10 Great Hurricane of 1780 kills 20,000 to 30,000 in Caribbean
November 20 Britain declares war on Holland
December 20 England declares war on Netherlands