Credited as an episode by some sources of This is The Life, "The Stableboy's Christmas", produced in 1979, features a star studded cast that includes Michael Anderson, Jr. (ex-The Monroes), Darleen Carr (ex-Sugar Time, The Streets of San Francisco), Sparky Marcus (The Bad News Bears), Frank Aletter (ex-Danger Island, It's About Time), Frank Campanella, Dave Madden (ex-The Partridge Family, Camp Runamuck), William Schallert (ex-The Patty Duke Show), and Danielle Brisebois (Archie Bunker's Place), who plays a young girl sent back in time to learn a very important life lesson when she first decides to keep a Christmas present, intended for her cousin, for herself.
This episode, as I recall, did air independently for several years in rotation with other syndicated holiday entries.