In order to know what day of the week a day in February 1985 was one needs to know the date in February.
February 29th, 1985 was actually a leap year. So, this day of the week did not occur.
Over the years it has been every day of the week.
February 3, 1947 fell on a Monday of that week.
February 7, 2006 was a Tuesday.
February 21st 2003 was a Friday.
February 24 2003 was a Monday.
February 17 2003 was a Monday.
February 6 2003 was a Thursday.
February 1 2003 was a Saturday.
February 14 2003 was a Friday.
February 28, 2003 fell on a Friday.
February 15, 2003 fell on a Saturday.
Groundhog Day, February 2nd, was on a Sunday in 2003.
January 3rd, 2003 fell on a Friday.
Thursday
It was Saturday.