(Becoming a tradition -- I just rerun this old thing. For a different perspective, see Matt Glassman. Also, probably light posting here today because I'll be over at Greg's place all day, and so I also won't do separate posts following up on what I do there...but I'll likely have some things here, too).
Presidents Day is a terrible idea for a holiday. Just an awful idea. In this republic, there's absolutely no good reason to take a day to honor our presidents.
On the other hand, Washington's Birthday is a perfectly good idea. If we're going to honor great Americans, I'm not going to argue with those who put George Washington first on the list of those to be honored. In fact, the official federal holiday is Washington's Birthday, but lots of states have renamed it to Presidents Day or something similar.
The consensus Three Greatest Presidents are Washington, Lincoln, and (Franklin) Roosevelt, and I wouldn't argue with any celebration of those three. The other two Greatest Men Who Were Presidents are Jefferson and the sadly undercommemorated Madison, and I'm also on board with honoring them (I'm not a huge Jefferson fan, but I don't really object to his status as a great American. Want to argue Adams? Ike? Take it to comments). On the other hand, I'm also pretty comfortable with Washington and King being the only two Americans honored with national holidays.
So, Happy Washington's Birthday, even if it isn't actually Washington's birthday, and even if most of what you're seeing are references to Presidents Day, President's Day, or Presidents' Day -- any way you spell it, a really bad idea. Which reminds me -- if you happen to think of James Buchanan, Franklin Pierce, or Richard Nixon today, I think what you're supposed to do is spit twice over your left shoulder to avoid bad luck.