When you write greeting cards, do not capitalize the “happy hoildays” phrase because it refers to a generic time period rather than the more specific “Merry Christmas”. People will argue with you and you will see it incorrectly on thousands of Christmas cards, but they are wrong.

Before I get a bunch of wise-ass emails, please note that I’ve capitalized the phrase in the title above because it’s a title.

Examples

Best wishes and happy holidays to you and your family.

Merry Christmas, Happy New Year, and happy holidays to all of our colleagues.

Happy holidays, and to all a good night.