A holiday that has no real reason other than being an excuse for furniture and automotive dealers to have huge sales, and make Americans that don't know anything about their government feel stupid.
Example One: It's Presidents Day, so come on down and fork over alot of money for this used car...
Example Two:
Dumb Person: Hey, Happy Pres. Day, man!
Smart Person: Yeah...okay. Hey, do you know who the first five presidents were?
DP: Uh...Washington, Jefferson...Lincoln.
SP: Exactly.