Obviously Christmas is the daddy (although at least it seems to have some meaning) but outside of that which is your most pointless commercial day?
Halloween - I have absolutely no idea what the point of it is and I don't recall it being such a big event when I was a kid (possibly because it combines dressing up and knocking on stranger's doors, two things I wouldn't willingly choose to do).
Valentines - Force people to spend a fortune and make one particular day the time when you have to show your love to someone. The other 364 days are of course insignificant in a relationship.
Halloween - I have absolutely no idea what the point of it is and I don't recall it being such a big event when I was a kid (possibly because it combines dressing up and knocking on stranger's doors, two things I wouldn't willingly choose to do).
Valentines - Force people to spend a fortune and make one particular day the time when you have to show your love to someone. The other 364 days are of course insignificant in a relationship.