March 14, 2013, 12:33 PM — Here's how you can integrate Facebook into your Calendar or Contacts on the iPhone, iPad or iPod.
1. Make sure you have the iOS Facebook app installed.
2. Go to Settings.
3. Go to Facebook in Settings.
4. Under the "Allow These Apps to Use Your Account" make sure that the Calendar, Contacts and Facebook are toggled to the On position.
5. Click the Update All Contacts button.