Rest is important for recovery after the weekend's workouts.
So take the day off. Friday is also a day of rest. In this program you will run on Tuesdays, Wednesdays, Thursdays and Sundays. So begin this Monday by contemplating the training that will begin tomorrow. Over the next 12 weeks, you will progressively add a half mile to your Tuesday workouts every third or fourth week so that by Weeks 2 and 1, you will be up to 3.0 miles for this mid-week workout.