When does A Claymation Christmas Celebration return?

Will Vinton's Claymation Christmas Celebration is an animated Christmas television special. The special is co-hosted by Rex (Johnny Counterfit), an erudite Tyrannosaurus rex, and Herb (Tim Conner), a dimwitted and bespectacled Styracosaurus with a gluttonous appetite. Rex and Herb introduce several stand-alone videos of Christmas carols and holiday standards.