puzzles, teaching, and academic technology  My web page About My applets Virtual seminar Posted by: Dave Richeson | February 12, 2009 What’s special about tomorrow? Tomorrow (2/13/09) is both Friday the 13th , a scary day for those of you with paraskevidekatriaphobia , and it is also 1234567890 day . What is 1234567890 day? At 6:31 pm