Example image of eyePlorer eyePlorer map for '1620': Gregorian calendar Julian calendar Leap year starting on Saturday Leap year starting on Wednesday Roman numerals February 4 Ferdinand II, Holy Roman Emperor Gabriel Bethlen Carousel May 17 Turkey June 3 North America Quebec Quebec City Frederick V, Elector Palatine July 3 Treaty of Ulm (1620) Delfshaven July 15 Leiden Pilgrim August 5 England Mayflower Old Style and New Style dates Plymouth Speedwell (ship) August 7 Johannes Kepler Witchcraft Les Ponts-de-Cé Louis XIII of France Marie de' Medici Poitou 1602 August 8 Cape Cod November 11 September 6 Weil der Stadt Battle of Ţuţora (1620) Moldavia October 7 Ottoman Empire Polish–Lithuanian Commonwealth September 17 Ethiopian aristocratic and court titles Gojjam October 6