The calendar and your days
Marking a run done or skipping it
Open the day's workout and tap Mark as done under its start button, then Mark done. Use it for a day you ran without recording: the day counts as done, and adds no miles unless a run is on it. To undo it, tap the check at the top of the workout, then Mark not done.
There is no skip button. To take a workout off your plan, open it and tap Delete this workout at the bottom: the day becomes a rest day and your week's planned miles drop by its distance. Your recorded runs are never touched.
A run you simply did not do needs nothing: once its day passes it shows as missed, and a run later that week can make it up. Both buttons need a membership.