I adjusted my class/year dates/times and all of my lessons are gone. What happened? ← Frequently-Asked Questions The class/year start/end dates determine where your lessons will display and adjusting those dates after you have added lessons will cause your lessons to shift or be removed. We recommend first adjusting all of the dates that were changed back to their original values. This may bring all of your lessons back instantly. If you do not see your lessons return, please contact us at firstname.lastname@example.org.