This article will teach you how to realign your rotation schedule in the Planboard iOS app. If you do not already have the app, you can download it here.
If a day in your planner is showing the wrong classes, you can easily realign your rotation schedule to match up with the calendar dates. Note that this does not apply if you have a "Daily" rotation set.
Tap on the rotation for the day in the toolbar.
Select the proper rotation for that day. Then tap "Change Rotation".