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.
April, 25th, 1988, was a Monday.
February 1 1988 was a Monday.
February 24, 1988 was a Wednesday.
February 13 1988 was a Saturday.
February 24, 1988 fell on a Wednesday.
February 14, 1988 fell on a Sunday.
February 25, 1988 fell on a Thursday.
February 6th, 1900 was a Tuesday.
February 6th, 1920 was a Friday.
September 6th, 1988 fell on a Tuesday.
SAturday
Tuesday
monday