In order to know what day of the week a day in February 1985 was one needs to know the date in February.
February 15, 1985 was a Friday.
Feb 15, 1984 was on a Wednesday.
Feb 20 1943 was on a Saturday.
Feb 12 1997 was a Wednesday.
Feb 28th 1964 was a Friday.
21st Feb 1946 was a Thursday.
Feb 1 2003 was a Saturday.
Feb 2 1963 was a Saturday.
12 Feb 1925 was on a Thursday.
7th Feb 1977 was a Monday.
Feb 27 1979 was a Tuesday.
Feb 3 1959 was a Tuesday.