History of Bathing Costumes By Hilda Junior May 19, 1900 Early Costumes In early times the girls had to have their legs covered. Period: May 19, 1900 to May 19, 2010 Bathing Costumes May 19, 1920 1920 Legs are still covered. May 19, 1940 Having fun at the beach Fun at the river. May 19, 1950 Two Piece Bathing Costume We can now see tummies. May 19, 1990 bathing costumes are more showy... We are starting to show more. May 19, 2010 Today!!!!! We can Mix and Match.