Use the following list of dates for your programs in Problem Set #1:

January 1 1900
February 29 1900
February 29 1920
December 7 1941
April 8 1947
November 23 1963
May 7 1959
July 4 1976
December 31 1999
January 1 2000
September 11 2001
September 3 2008

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Prof. Kahl

P.S. You'll get extra credit if you can correctly determine the significance 
of each date on this list.  Hint: There is one date for which
nobody has yet succeeded.