Sagan Day." I think this is a great idea. They have some excellent speakers lined up, including Phil Plait (The Bad Astronomer) and James Randi.
A similar event has been growing over the last few years as well, called "Darwin Day." I think that events like these are great ways to spread enthusiasm about science. While this event is on November 7th, I will try to do something on the 9th (maybe some star gazing). Spread the word and maybe do a small gathering of your own.