We reported earlier here on the website that the 12/24 Christmas Eve edition of WWE Monday Night Raw will be taped on 12/18 in Pittsburgh on a Tuesday. The 12/31 edition of Raw will be taped on 12/29 in Washington, D.C. The 1/2 and 1/4 editions of Main Event and Smackdown will be taped on 12/30 in Richmond. The company is holding a taping on 12/19 where they will also tape the 12/21 and 12/28 SmackDown shows, but they have yet to finalize a location (this is the night after the TLC PPV in Brooklyn).
In an update on this, WWE has switched their December 18th TV taping in Pittsburgh, Pennsylvania from a SmackDown taping to a Supershow taping, which will allow them to tape all the episodes for the holiday week. The December 17th taping is likely to be a Supershow taping as well to handle that week.