May 15 is the 135th day of the year. There are 230 days remaining until the end of the year.
+ 1862 – President Abraham Lincoln signs a bill into law creating the United States Bureau of Agriculture. It is later renamed the United States Department of Agriculture.
+ 1905 – Las Vegas is founded when 110 acres (0.45 km2), in what later would become downtown, are auctioned off.
+ 1928 – Walt Disney character Mickey Mouse premieres in his first cartoon, "Plane Crazy".
+ 1941 – Joe DiMaggio begins a 56-game hitting streak.
( Births )
+ 1942 – K. T. Oslin, American singer-songwriter and actress
+ 1953 – George Brett, American baseball player and coach