I watched the 1966 "How the Grinch Stole Christmas" (incredibly, I had never seen it despite being a fan of Chuck Jones' work). And earlier this month the Tiny Toons Christmas special as part of watching the series itself.
I've known about it for years but never seen it until now. For some reason, I can't find any evidence that it's ever been shown on Finnish TV (though the two Grinch features were of course released here). Maybe because Dr. Seuss' books were never translated into Finnish, which I also find baffling.