"Holly Jolly Secrets" is the collective name for the nineteenth and twentieth episodes of the third season of the American animated television series "Adventure Time". The episodes were written and storyboarded by Kent Osborne and Somvilay Xayaphone, from a story by Mark Banker, Kent Osborne, Patrick McHale, and series creator Pendleton Ward. It originally aired on Cartoon Network on December 5, 2011.