Today is only the second time in history that all four major sports in the respective professional leagues (MLB, NFL, NHL, NBA) are being played on the same day.
I have no idea of when the other time was, but I would guess during the 2001 World Series, which was pushed back because of the 9-11 Terrorist Attacks.
I have no idea of when the other time was, but I would guess during the 2001 World Series, which was pushed back because of the 9-11 Terrorist Attacks.