Change how off-days affect rotation
Off-Days block out a day in your planner so you cannot create lessons that day. When you add them, it will change your rotation depending on your rotation settings.
Add off-days to your schedule for things like holidays, PD days, etc.
Add off-days from your planner for unexpected events, such as a Snow Day.
Update rotation settings
From the Lessons menu, choose Timetable.
Click the Change Rotation button.
Enable or disable Off-days Affect Rotation.