Tonight, being the night after Halloween, is the night when The Great Pumpkin comes. You collect your Halloween candy, put it in your trick-or-treat bucket, and leave it by the door. The Great Pumpkin will come and collect the candy, to give to the children who don't have any. He will leave a toy for you in its place.
"You don't believe the story of the Great Pumpkin? I thought little girls always believed everything that was told to them. I thought little girls were innocent and trusting" - Linus