Imagine giving a complete stranger an astrological reading, then revealing that you knew his or her birthday! You can with Dan Harlan's Birthday Suit! After pointing out the similarity between a deck of cards and the calendar (52 cards, 52 weeks, 13 cards in a suit, 13 phases of the moon, etc.) the deck is spread revealing only 3 face-up cards. When the cards are turned over, the spectator's birth date is printed on the backs! Repeatable with different spectators.