Casimir Pulaski Day is a local holiday officially observed in Chicago, Illinois on the first Monday of every March in memory of Casimir Pulaski (March 6, 1745 – October 11, 1779), a Revolutionary War cavalry officer born in Poland as Kazimierz Pułaski. He is praised for his contributions to the U.S. military in the American Revolution and known as "the father of the American cavalry". This is a separate holiday from the federal observance, General Pulaski Memorial Day, which commemorates Pulaski's death from wounds suffered at the Siege of Savannah on October 9, 1779.