Yes! You can synchronize both your shifts and absences with iCal or GoogleCal.
To do this, click on your name in the top right corner and then click on your "Profile".
Here you will find the box "Calendar Synchronization" on the left side. Now you can choose for which company you want to create the link for synchronization and whether this link should transfer your shifts or absences to the calendar. Once the link is created, all you need to do is copy it and add it to the corresponding calendar.