May 23, 2011 fell on a Monday.
June 23, 2011 was on a Thursday.
August 23, 2011 fell on a Tuesday.
December 23, 2011 fell on a Friday.
29 May to 4 June is week 23 of 2011.
February 23rd, 2011 was a Wednesday.
Sunday
A Saturday
May 23 1967 was on a Tuesday.
May 23 1972 was on a Tuesday.
May 23, 1977 was a Monday
May 23 2010 was a Sunday.
May 23, 1991, was a Thursday.