April 9 is the 99th day of the year. There are 266 days remaining until the end of the year. This date is slightly more likely to fall on a Monday, Thursday or Saturday (58 in 400 years each) than on Tuesday or Wednesday (57), and slightly less likely to occur on a Friday or Sunday (56).
+ 1865 – American Civil War: Robert E. Lee surrenders the Army of Northern Virginia (26,765 troops) to Ulysses S. Grant at Appomattox Courthouse, Virginia, effectively ending the war.
+ 1959 – Project Mercury: NASA announces the selection of the United States' first seven astronauts, whom the news media quickly dub the "Mercury Seven".
+ 1965 – Astrodome opens. First indoor baseball game is played.
( Births )
+ 1898 – Curly Lambeau, American football player and coach (d. 1965)
+ 1926 – Hugh Hefner, American publisher, founded Playboy Enterprises (d. 2017)
+ 1932 – Carl Perkins, American singer-songwriter and guitarist (d. 1998)
+ 1954 – Dennis Quaid, American actor