Example image of eyePlorer eyePlorer map for '1808': Gregorian calendar Julian calendar Leap year starting on Friday Leap year starting on Wednesday Roman numerals January 1 United States United States Constitution Edinburgh January 12 Learned society Wernerian Natural History Society Brazil January 22 Crown colony Governor of New South Wales January 26 New South Wales New South Wales Corps Rum Rebellion Denmark February Finland France Russia Sweden February 2 Papal States 1807 April 5 February 6 HMS Bounty John Adams (mutineer) Mayhew Folger Pitcairn Islands Anthracite February 11 Industrial Revolution Jesse Fell Pennsylvania Declaration of war February 21 Finnish War Helsinki March 2 Suomenlinna March 8 Portuguese Empire March 11 Tampere