She's a Good Skate, Charlie Brown, 1980. This program was written from a relatively long series of Peanuts comic strips originally published from November 04, 1974. The strip had other subplots that were left out of the special, and changes that were made to the storyline by the time it went to the small screen.
Snoppy│Snoppy - #Snoppy
Book Peanuts Charles Schultz 1966 Eleventh Printing But We Love You, Charlie Brown