I say Merry Christmas to those that celebrate Christmas. And if I know someone celebrates Hanukkah or Kwanza or Festivus, I say happy Hanukkah, Kwanza or Festivus..... If i dont know what someone celebrates i say "have a good holiday".  What I really cant stand is those that feel they have to say "Merry Christmas!!" to everyone in a real sock it to em type attitude to show their religion and beliefs trump all others and anyone with different beliefs should leave the country immediately. The type that think there is some kind of "war on Christmas" 4951