Yeah, everyone knows today is some Hallmark trade union holiday or something, but lots of other people around the world will be celebrating too. For example, today is a national day of mourning in Mexico, as it's the anniversary of the death of revolutionary leader Vicente Guerrero. It's also Communist Martyrs' Day in Iraq, and I'm willing to bet there are quite a few martyred Iraqi communists. They can't have done too well under Saddam.
And today in 1843, this happened: http://upload.wikimedia.org/wikipedia/en/6/6f/MrKitePoster.jpg