Final answer:
The Dallas Cowboys Cheerleaders' most significant non-game appearance is their annual performance at the Thanksgiving Day game.
Step-by-step explanation:
The most significant non-game appearance for the Dallas Cowboys Cheerleaders (DCC) is their annual performance at the Thanksgiving Day game.
This tradition dates back to 1966 when the DCC first performed at the game. It has since become a beloved part of both football and American culture, with millions of viewers tuning in to watch the performance.
Not only do the DCC entertain the crowd with their high-energy routines, but they also represent the team and embody the spirit of the Dallas Cowboys franchise.