Even a Miracle Needs a Hand MY synopsis:
'Twas The Night Before Christmas
(1974 CBS Xmas Cartoon)
Singing brainiac mouse breaks singing town clock cuz he doesn't believe in santa and christmas...greatest Xmas cartoon...ever!
More thorough synopsis:
Letters addressed to Santa Claus from the town of Junctionville are returned because of a letter denouncing Saint Nick as a myth. Joshua Trundel, the local clock maker, builds a clock that may bring Santa to Junctionville. Meanwhile, Father Mouse discovers that his son Albert wrote the letter. Later, Albert accidentally breaks the clock, and Trundel's reputation is ruined. Albert decides to repair the damage, and Santa Claus hears the song, and delivers presents to Junctionville.