Crons are scripts that repeat itself in defined time interval. Below you can find table with most important ones.

Time Name Description
1:00 Course backup Will backup all courses that were changed in last 24 hours.
3:30 Course list synchronization  
3:40 Synchronization of study programs  
3:50 Study plan synchronization  
4:00 Current semester synchronization Loads students, parallels and teachers of the current semester