Elf on a Shelf arrives each year on December 1st. It is said that on the day after Thanksgiving, the elves begin their journey to homes all over the world. They arrive just before dawn on December 1st, and they will remain until Christmas Eve. Elf on a Shelf is believed to be a magical creature who helps Santa Claus keep track of who has been naughty or nice throughout the year. He is also known for his mischievous ways and his ability to disappear and reappear at will.