Uncategorized Free Christmas Theme Pictures : Alphabet letter s is for santa claus free activity worksheet for preschool and prek.things to do:name the letter and the sound it makes trace the large letter with a fingertrace the wordrelate the letter sound to the picture. Christmas or christmas day is an annual festival commemorating the birth of jesus christ, observed most commonly on december 25 as a religious and cultural celebration among billions of people around the world.