Example image of eyePlorer eyePlorer map for '1866': Common year starting on Monday Common year starting on Saturday Gregorian calendar Julian calendar Roman numerals January 1 The Liberator January 6 Karam (film) Lebanon Maronite Church Ottoman Empire January 12 London Royal Aeronautical Society Battle of Abtao Chile Chiloé Island February 7 Peru Bank robbery February 13 Liberty, Missouri Jesse James Calaveras Skull February 26 Hoax Pliocene February 28 Alexander II of Russia April 4 Kiev American Society for the Prevention of Cruelty to Animals April 10 Henry Bergh Berlin May Otto von Bismarck Unter den Linden Battle of Callao May 2 Financial crisis May 11 Overend, Gurney and Company Half dime May 16 Nickel (United States coin) United States Congress Battle of Tuyutí May 24