Why stop there? I think you can get Halloween cards for real cheap right about now. Just cross out "Happy Halloween" and put "Happy Holidays". Badabing, badaboom. Saved 35%.
Or better still, just use these (just made it up - I'm bored today). Fold each page on the line provided, insert the second page inside the first (inside out), circle the appropriate items. Boom. Done.
Hallmark can kiss my arse. All rights reserved ya cheap bastids.
