Halloween

Halloween is an Earth holiday in which humans dress up in strange outfits that make them look like idiots other people or things. It also involves pumpkins with the insides taken out and chunks cut off to make some sort of picture. Not much is known about it as of yet, but Bumblebee will soon have his first Halloween in a future episode of Transformers Animated.

From Teletraan I: The Transformers Wiki, a Wikia wiki.