title: NSDateFormatter problem with weekday EEE
body: <p>Why does the following code output: Dday: (null)</p>
  
  <pre><code>NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
  [dateFormatter setDateFormat:@"EEE HH:mm:ss"];
  NSDate *date = [dateFormatter dateFromString:@"Sun 15:00:00"];
  DLog(@"Ddate: %@", date);
  </code></pre>
  
  <p>If I use the format HH:mm:ss and string 15:00:00 i get a valid date...</p>
  
  <p>Cheers mate</p>