I thought of a reply you may want to try if you do in fact get a visit from the elders on Dec. 25th. If they indicate that you can be DF'd or DA'd for celebrating Christmas, you could ask them why it was okay for the Organization to celebrate it back in the early days and that it was endorsed by Brother Russell AND Brother Rutherford EVEN THOUGH THEY KNEW IT WAS A PAGAN HOLIDAY. There's a quote in one of the old publications where Rutherford actually talks about the paganism and commercialism of Christmas and then goes on to say "we might as well join in with the rest of the world in celebrating this holiday." or something to that effect.
Your elders will probably give you the old "light gets brighter" bullshit, but don't let them off the hook. Emphasize that these two "annointed" brothers KNEW Xmas was pagan, and they STILL gave the go-ahead...........should they have been disfellowshipped for knowingly promoting a pagan holiday? Aren't they both in heaven right now?? (or so the average JW thinks). If so, then I guess Jehovah didn't really consider it a real bad sin to celebrate it right?? Watch their faces fall.
You might also ask them point-blank if they plan on DFing and DAing everyone who wears a wedding ring, as it's also from pagan origin. Make sure you look right at their hands when you say this......it'll make them feel real uncomfortable......
Any other suggestions on how to trip them up?