Recently I feel that there is a war going on between people saying "Merry Christmas" vs. "Happy Holidays". Most of the media I'm exposed to is from a Christan world view (blogs, radio) and are very into the whole "Merry Christmas" thing.
As for me, I say "Happy Holiday's", and this is why. This time of year is full of holidays, thanksgiving, Christmas, New Year, just to name a few in the Christan tradition. So when I say happy holidays to someone I have all the bases covered, not just Christmas. Also, I would feel wishing someone a Merry Christmas on Nov. 29 is a bit extreme. So it's "Happy Holidays" for me!
However, if you disagree with me, you can wear this t-shirt, I found here.