In the old days, it was not called the Holiday Season; the Christians called it ‘Christmas’ and went to church; the Jews called it ‘Hanukkah’ and went to synagogue; the atheists went to parties and drank. People passing each other on the street would say ‘Merry Christmas!’ or ‘Happy Hanukkah!’ or (to the atheists) ‘Look out for the wall!’ –Dave Barry, “Christmas Shopping: A Survivor’s Guide”

or in other words:

Merrychristmasahanukkahkwanzaa