I'm looking for these books that I think were written in the 70s/80s about the history of various holidays. I only saw the ones about Christmas and Halloween, but I believe there was a book about Easter and maybe Thanksgiving. They were illustrated by the same artist, and they used a simplistic black and white style with colored accents depending on the holiday (orange for Halloween, red and green for Christmas, etc). Since it was a series I want to say the title was something really generic, like "The History of ____" or "The story of ____" (I think it was closer to the latter).
old kids' books about the history of holidays - What was that one?!
You know, that one!!