Every year, I make a point of buying greeting cards where the word "Christmas" is used and avoiding the generic "season" and "holiday" varieties. This is something defenders of "Merry Christmas" may want to bear in mind.
May your days be merry and bright.....
I do that, too, and some years the search is more difficult than others. I occasionally find next years selection in the January sales!
Which is great. I'm just pointing out that there are reasons for some of us to not use Merry Christmas that aren't attempts to make it a secular holiday. It's a time of giving and celebration, some of the folks we give to and celebrate with might be of other persuasions. When I'm cycling in purely Christian circles I stick to Merry Christmas, but most of the time I'm in mixed circles.