May 20 2010 was a Thursday.
January 20 2010 was a Wednesday.
March 20 2010 was a Saturday.
April 20 2010 was a Tuesday.
July 20 2010 was a Tuesday.
August 20 2010 was a Friday.
September 20 2010 was a Monday.
October 20 2010 was a Wednesday.
November 20 2010 was a Saturday.
Week 20 is May 9 - 15.
Saturday
Tuesday
Saturday