My FaceBook events are not showing up in my Calendar on my iPhone 4 running iOS 7. Sometimes I can get them to show up by going into Settings -> FaceBook and turning Calendar integration off and on. Then a while later, I'll find that new FaceBook events are not coming through again.
The Calendar has the FaceBook Events option ticked.
Why is it not working properly?
My iPad 3 running iOS 7 doesn't appear to have this problem.