The tradition of pumpkin carving began not with carving pumpkins, but carving potatoes, turnips, and beets. The Irish would carve faces into these in the hope of warding away evil spirits that roamed the land on Samhain. This idea came from the story of Jack of the Lantern (Stingy Jack). When the Irish came to America, they used pumpkins, which were native and much easier to carve.
Guys guys guys, my high school has a Harry Potter club and they have duels in the hallways between classes and they have to react to the spell and they're having a Yule Ball and their going to act out the Battle of Hogwarts and can I just go already I just. GAH.
All Hallows' Eve / The pumpkin grinned from ear to ear, "The moon is bright, the sky is clear. This is the night we've waited for, when elves come knocking on the door. / "When witches ride their broomsticks high and ghosts and goblins fill the sky. Then Jack and Jill, with fairy queen, will dance and sing: it's Halloween." ~ by Constance B. OSborne