Well, happy Yuletide Friday the 13th, all! And with a Friday the 13th so close to Christmas, I think this calls for A Friday the 13th Christmas Special! Yes, this time, some bad guys are trying to stop Christmas from coming, as is the usual deal with the old Rankin/Bass Christmas specials. But this time they picked the wrong year, for this time Friday the 13th is the first of the Twelve Days of Christmas, and that means Jason Voorhees ain't going to let anyone spoil his Christmas! (He is still just a child at heart, you see.)
Now, being a deathless serial killer, with a long list of victims, Jason is always on Santa's naughty list. But this time, Jason will defend Santa Claus against those who would attempt to prevent Christmas from happening, killing all those who stand in Santa's way! So this time Jason will be deemed nice for a change, and finally finding the love and redemption he has always desired, he decides to stop being a killer from now on.
Oh, but once Christmas is over, Jason quickly gets bored and misses his previous serial killer/movie star lifestyle, and so he goes back to killing naughty teens. Oh, but after finally meeting Jason, Santa realizes that Jason was merely killing naughty people all along, and as such has always been nice. And so Santa gives Jason a brand new arsenal of bladed and pointy weapons to use, and he goes on a bloody rampage against those who wage the "War on Christmas", finally finding acceptance for slasher killers amongst previously disapproving conservative Christian parents everywhere.
That's A Friday the 13th Christmas Special: don't miss it, or it may be the last thing you ever don't see!