title: (#100) Invalid parameter OAuthException when creating event using Graph API Explorer
body: <p>I am using Graph API Explorer to try and work out how to create a user event prior to coding it for real in Objective-C for an iOS app.</p>
  
  <p>I have obtained an auth token which contains <code>user_event</code>, <code>publish_actions</code> and <code>create_event</code> permissions.</p>
  
  <p>I am <code>POST</code>ing a request to <code>https://graph.facebook.com/12345678/events</code> with parameters of <code>name</code> set to <code>Tester 2</code> and <code>start_date</code> set to <code>2013-06-27</code></p>
  
  <p>In response I get </p>
  
  <pre><code>{
    "error": {
      "message": "(#100) Invalid parameter", 
      "type": "OAuthException", 
      "code": 100
    }
  }
  </code></pre>
  
  <p>I can't see what I'm doing wrong.  Any help would be much appreciated.</p>
  
  <p>Thanks</p>
  
  <p>Andrew</p>