Most people think Valentine's Day was invented by Hallmark Cards. It wasn't. Valentine's Day is actually a well-documented, historical phenomenon -- its tangled roots winding their way through centuries worth of Christian liturgy, pagan tradition, myth, and an occasional beheading.
I've been doing my own research these days, trying to figure out how many peace organizations exist on planet Earth. Estimates vary greatly, but the most credible source I could find -- Housman's Peace Resource Project -- lists 3,330.