It looks like Elon Musk is not letting the holidays get in the way of the maiden launch of the Falcon Heavy booster, even though it is already running about five years behind its original schedule:
SpaceX is understood to be targeting mid-December for the Static Fire of Falcon Heavy followed by a late-December, No Earlier Than 29 December, launch of the heavy lift rocket.
SpaceX schedules a lot of NET (no earlier than) launch dates. They usually slip. We’ll see if the same thing happens here.