Christmas stamps are typically released in October or November, in preparation for the holiday season. The designs are usually festive, and feature popular Christmas motifs such as Santa Claus, reindeer, and Christmas trees. Some stamps may also feature religious themes, such as the Nativity scene or the Christmas angel. The designs are chosen by the United States Postal Service (USPS) and are often created by well-known artists or illustrators. Some stamps may be limited edition, making them collectible and valuable.