Thankfully, last year, we were gifted the greatest anime Christmas special of all: Neo Yokio: Pink Christmas!
It would perhaps even be possible to say that Pink Christmas succeeds at being the greatest anime Christmas special because it is potentially even better than the original series instead of a holiday cash in.
From Rudolph and Frosty to A Muppet Family Christmas, Christmas specials are drenched in the holiday from head to toe.