ClassLink Summer

Once school is out, go into Roster Server>>Imports>>Sync Schedule>> set the Roster Blackout dates to current date through the date you will make the new year active. 

Once the new year is active, turn this back off. 

Go and check Thresholds

In OneSync

Make sure the Year Rollover date is the date you will make the new year active. 

Go to the gear in the upper right and then click General Settings,