• The United States takes possession of its newly bought territory of
Florida from Spain.
James Weddell's expedition to Antarctica reaches latitude 74°15' S and longitude 34°16'45" W: the southernmost position any ship had reached before, a record that will hold for more than 80 years.
Vendsyssel-Thy, once part of the Jutland peninsula that formed westernmost Denmark, becomes an island after a flood drowns its 1 km wide isthmus.
• The Mercantile Agency (ancestor of
Dun & Bradstreet is founded in New York City by Lewis Tappan.
• The first settlers for the settlement of
Christchurch arrive at the Port of Lyttelton (New Zealand).