Above: The Garfield Halloween special, which first aired on the CBS TV network in 1985. If you were of the right age, the world of analog TV seasonal "specials" was the norm. Because the IRC stuff annoys the readership, we've decided to go this route.
Halloween is Grinch Night (1977), a prequel to the 1966 special How the Grinch Stole Christmas. I think they used to run this one on NBC. This is a DePatie-Freeling production, which means it came out of the same studio as the animated Pink Panther film intros and the now long-forgotten Pink Panther and Inspector Clouseau cartoons.
Above: Witch's Night Out (1978), a Canadian-made special featuring the voices of Gilda Radner, Cathlene O'Hara, Valri Bromfield, and Dan Aykroyd, so this is where Second City (SCTV) met Saturday Night Live. First ran on NBC in America, CBC in Canada; this writer saw it run on KTLA (Channel 5 in Los Angeles) as weekend filler between old monster movies in October. Is it ugly? Maybe. But it is the sequel to an earlier cartoon called The Gift of Winter (1974), with many of the same characters and Radner, Bromfield, Aykroyd voicing them.