Sept. 13, 1951 was on a Thursday.
Sunday
It was a Sunday.
Monday
November 13 1988 was a Sunday
February 13 1988 was a Saturday.
May 13, 1988 fell on a Friday.
Tuesday
Wednesday
June 13th 1988 was a Monday.
It is the Sunday in week 38 of 2013.
Monday. I saw The Beatles live the following Sunday, Sept 13, 1964 in Baltimore, MD.