Login to your Facebook account on a web browser (the necessary link is not available in the mobile app). 

Find the Explore section in the left menu and click on "Events":

Next, find the "Upcoming Events" link in the right sidebar, under the "Birthdays" section:

Right click on the "Upcoming Events" link, and choose "Copy link address". 

Next, back in your DAKboard account, add or edit a calendar block in a custom screen, then paste in the copied URL under the "Calendar URLs" section:

Optionally specify a color for the calendar, save your changes then preview the screen to view your Facebook events on DAKboard.