It was a Wednesday.
April 13, 1987 fell on a Monday.
Sunday
Monday
March 13, 1987 fell on a Friday.
May 13 1945 was a Sunday.
13 May 1962 was a Sunday.
May 13, 1986 was a Tuesday.
May 13 1955 was a Friday.
May 13 2010 was a Thursday.
May 13 1954 was a Thursday.
May 13, 1996 was on a Monday.
May 13, 2009 was a Wednesday.