One really good non-holiday PEANUTS special is WHY, CHARLIE BROWN? WHY? Wikipedia is slightly incorrect in saying that it's only been aired on television once, because I have a partial recording from the mid-90s, I just don't know where it came from (there's no network bug, but I'm assuming it was Disney, consdering they played THE CHARLIE BROWN AND SNOOPY SHOW once) - it's heartwarming, touching, and very poignant: Linus even shows some backbone by confronting a bully.
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Christmas Music
Macy's Thanksgiving Parade
Sesame Street debuts on Netflix
Back to the Rock Season 2
Sam and Friends Book
Jim Henson Idea Man
Bear arrives on Disney+