Halloween is Grinch Night was released on DVD several years ago under the alternate title "It's Grinch Night." Kinda wish I bought those Dr. Seuss DVD's when I had the chance. I really should have replaced my VHS copy of Pontoffle Pock back then. Grinch Night may be on Youtube, but those things have a tendency to be taken down.
I'm mixed about watching Fat Albert's Halloween special because...well... And I wish I could watch my VHS tape of The Charlie Brown and Snoopy Show episode where Peppermint Patty and Charlie Brown go to the bowling alley Halloween Night and Chuck's stray bowling ball (he was facing the wrong way) knocks over Marcie and Linus waiting at the Pumpkin Patch, mistaking it for The Great Pumpkin. A lost classic that doesn't get much attention because it was only animated in that forgotten TV show. And you just know no one reads the strips. Otherwise, there's that great aftermath of Marcie's parents taking her to get "deprogrammed" of Linus's influence.
As for "It's the Great Pumpkin, Charlie Brown," it's a shame that there isn't much of a 50th anniversary push, other than McDonalds having trick or treat buckets at the end of the month. Seeing it's not the Christmas one and all. And yeah, it's a defining classic, if kind of overrated as far as Peanuts specials go. But it's such a shame that Great Pumpkin lives constantly in the shadow of the Christmas special. Of course, I suppose that it's equally unfair that the Thanksgiving special lives in the shadow of both.