Declutter the calendar
Set the timetable up in a different area instead of getting them into each day of the calendar. Create settings for what to show on the days on the calendar eg. important meetings or exams. Rather than the schedule which repeats all over again and is fairly messy.
Sophia L commented
A way to turn the classes, tasks, etc. on or off on the calendar to let the user choose is good
Patrick Хейни commented
Remove the classes icons, so only due dates for tasks/exams show up
The side bar is pretty great tho