For a reason I don't quite understand, a lot of people seem to use Facebook Events in order to plan things and invite people to them. For many of us, it has become an unnecessary evil. The last thing I want to have to do is check not one but two places for upcoming events. Luckily, OS X lets you integrate Facebook Events right into the Calendar app on your Mac. Here's how:
Before beginning, I'll note that this works with OS X Mavericks and higher. If you're running a lower version of OS X you won't have the option to add Facebook calendars.
That's all there is to it. All the events from your Facebook will now automatically filter into your Mac OS X Calendar app.