i think its a Saturday or was :)
May 31 1947 was a Saturday.
January 31, 1947 fell on a Friday.
March 31, 1947 was a Monday.
31 May 1958 was a Saturday.
May 31 1967 was a Wednesday.
May 31, 1932 was a Tuesday.
May 31, 2006 was a Wednesday.
May 31, 1983 was a Tuesday.
May 31 1966 was a Tuesday.
May 31, 1976 was a Monday.
May 31 2010 was a Monday.
May 31 1996 was a Friday.