The calendar and your days
When you miss a run
A planned run you did not do shows grey with its mark once its day has passed, on the calendar and on every week strip.
Nothing moves on its own. If you run later in the same week on a day with no run planned, that run makes up the one you missed.
Plan Health counts it as missed until it is made up. To take a run off your plan instead, open it and tap Delete this workout.