The date was April 9, 1965.
The place was the Houston Astrodome (the proclaimed Eighth Wonder of the World).
47,876 excited fans jammed into the Astrodome to watch the fist indoor major league baseball game as the Houston Astros took on Mickey Mantle and the New York Yankees. Yankee manager Johnny Keane gave Mickey Mantle the honor of being the first batter in the game.
In addition to being the first batter, Mickey also had the first hit (single) and the first home run ever hit indoors in a game between two major league teams.
The Astros won the game 2-1 in 11 innings on a two out single by pinch hitter Nellie Fox.