The Bergeron Squares did a Kids Week in 2001, during the Christmas holidays. I remember that.
And, the Perry CS also did Christmas shows, but the 12 Games episode aired 3 days before Christmas. On all of its Christmas episodes, G2-T2 was dressed as Santa Claus. There was a Christmas tree under the show's logo, and the set was decorated.
Eubanks CS did air a show on Christmas Day, and GSN aired that. Like the Perry counterpart, there were decorations, but no Christmas tree, I think. Both the front game and Money Cards boards had candy canes, very appropriate indeed.
In addition, if anyone's noticed on the Xmas PYL shows, there are Caroling Whammies. They'd pop up before commercial breaks, and even at the end of the show. They're pretty funny, I'll tell you!
BTW, USA aired only the 1983 Christmas show? Did it air the 1984 and 1985 shows as well? (I heard about GSN airing the 1984 Christmas show over the summer, but never saw it)
And, if I recall correctly, the last time TPIR aired on Christmas Day was in 1996. That episode would be repeated in 1997 and 1998, and then after that, they'd use a rerun episode for Xmas.