A timeless holiday favorite for kids who love Elmo, Cookie Monster, Oscar the Grouch, and more! Find out how Santa first came to Sesame Street and why we leave cookies for St. Nick on Christmas Eve. It's the night before Christmas-time to put out some cookies for Santa! But how did this tradition start? Elmo's dad spins him a bedtime story about his great-great-grandmonster, back when Sesame Street was a very different place. Why, everyone was so grouchy that Santa didn't even visit! With help from his friends, Elmo will bring kindness, holiday cheer, and the spirit of Christmas to Sesame Street. But will it be enough for Santa? The official tie-in to the new Sesame Christmas special (airing on HBO in 2016 and PBS in 2017), this Sesame Street Christmas tale teaches kids the importance of kindness and spreading holiday cheer.