1967 NFL Championship Game
The 1967 NFL Championship Game, commonly referred to as the Ice Bowl, was the 35th NFL championship, played on December 31 at Lambeau Field in Green Bay, Wisconsin. It determined the NFL's champion, which met the AFL's champion in Super Bowl II, formerly referred to as the second AFL–NFL World Championship Game.
Source: Wikipedia — 1967 NFL Championship Game (CC BY-SA 4.0)