I just used http://www.fbcal.com/ to connect my Facebook event to my Outlook. Super simple. I also hooked my Facebook Events to my Google Calendar.
With fbCal, you get two calendar subscriptions! That way it’ll be easy for you to remember your Facebook friends’ birthdays and all events that you’ve been invited to! These two calendars can be subscribed to (which will have them automatically update) or you may simply download a current copy. You can also have an RSS feeds of birthdays and events, as well! The process can be done in less than a minute, and it’s free! Create your own fbCal today!