Most mythical creatures, like Santa Claus and the Easter Bunny are connected a specific day, why shouldn’t the Tooth Fairy have her own day too? The Tooth Fairy probably evolved from old European traditions of leaving money under a child’s pillow after they lost a tooth. the first reference to the tooth fairy dates back to 1908 in the United States. So we don’t know exactly where she came from but we do know that she is at least 100 years old! Celebrate her every year on February 28th!