The answer is Thursday. Here is a helpful site for you:
http://www.albion.edu/english/calendar/Day_of_the_Week.html
November 5 1989 was a Sunday.
July 5 1989 was a Wednesday.
February 5, 1989 fell on a Sunday.
June 5 1989 was a Monday.
August 5, 1989 fell on a Saturday.
October 5, 2001, was a Friday.
October 5, 1963 was a Saturday.
October 5 1943 was on a Tuesday.
October 5, 1986 was a Sunday.
October 5, 1966 was a Wednesday.
5 October 1994 was a Wednesday.
October 5, 1973, was a Friday.