It was a Wednesday.
Saint Valentine's Day of 1985 was a Thursday.
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.
November 7, 1985 was a Thursday.
March 17th, 1985 was a Sunday.
11 June 1985 was a Tuesday.
7 January 1985 was a Monday.
October 5th 1985 was a Saturday.
July 4, 1985, was a Thursday.
December 5, 1985 was a Thursday.
15th April 1985 was a Monday.
March 16 1985 was a Saturday.