today, 17 september, is constitution day (or citizenship day). prior to it's official renaming in 2004 as "constitution and citizenship day," it was known simply as citizenship day. while the federal holiday is intended to celebrate citizenship, september 17 is, in fact, the anniversary date of the signing of the final draft of the united states constitution at the constitutional convention in philadelphia - way, way back in the misty days of 1787!
while i haven't taught constitutional law since 2004 spring semester, it is my favorite legal subject (particularly civil liberties and our first amendment freedoms).
check out the constitution day resources at findlaw.