I think the problem I have with calling it "International Skeptics' and Realists' Day" is that the group that call themselves "Skeptics" and "Realists" tend not to be that much more skeptical or realistic. Usually, as with any other human, "Skeptics" only doubt positions other than the ones they already pre-suppose. That doesn't make them any more skeptical than it does anyone else. If it were the literal definition, not the group name, then being skeptical is doubting anything new. The Catholic Church was pretty "skeptical" the day that crazy guy Galileo showed up.
Plus, they did loads of scientific experiments with fire and human flesh. But that's another thread.
Today, I'm skeptical of anyone who calls themself a "Skeptic"... I guess that makes me a "Skeptic". Crap, I think I just started an irrational-infinite loop
To the topic at hand, I think today should be called, "Pretty-much-as-likely-that-the-world-will-end-today-as-it-was-yesterday-and-will-be-tomorrow Day". But that's a really long name... so maybe we should just call it "December 21st" and try to forget it ever worried any one.
Seriously though, if the world were going to end, why would it be on a Friday!? It should be Monday morning... say 4:00AM? That make WAY more sense to me.