OK, technically the goal was scored very early in the morning on May 5, 2000 -- but we'll let that slide since the game actually started on May 4.
Game 3 between the Flyers and Penguins back in the 2000 Eastern Conference Semifinals was a key one. Philadelphia was the No. 1 seed in the East, but had lost Games 1 and 2 to the Penguins at First Union Center.
They won Game 3 in one single overtime, but needed another victory in Game 4 to realistically keep the series in hand.
Seven-and-a-half periods later, enter Keith Primeau, who saved things with the huge fifth overtime tally.