Nordstrom's gift cards say "Merry Christmas" on them. Those are the standards that they give out to whoever tries to buy a gift card - it's not like it's one option, it's the usual.
And mightn't 'Happy Holidays' offend Jehovah's Witnesses?
.............Merry Messiah's Manger Day!
(Micah 5:2 and all of Luke chapter 2 Day)
:-)