Actually, Linus is stood up
by the Great Pumpkin every Halloween
. He sits and waits while defending the Great Pumpkin's honor in the face of naysayers like his sister Lucy
, who thinks he's a gullible moron. But Linus can only take so much pessimism
: after several people have passed and told Linus in a reasonable tone that maybe - just maybe - the Great Pumpkin doesn't exist, he gets a little squirrely and starts yelling at them.
The Great Pumpkin may actually make an appearance somewhere, but never where Linus is.