title: calendric calculations in iOS broken before 1577... (julian -> gregorian)
body: <p>The same code     </p>
  
  <pre><code>NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
  [dateFormatter setDateFormat:@"d MMMM yyyy GG"];
  //13th of December 1577
  NSDate * aDate = [NSDate dateWithTimeIntervalSince1970:-12371067248]; 
  
  NSString * formattedDate = [dateFormatter stringFromDate:aDate];
  </code></pre>
  
  <p>Mac OS X target shows formattedDate correctly </p>
  
  <blockquote>
    <p>13th of December 1577</p>
  </blockquote>
  
  <p>iOS 5.0 target shows </p>
  
  <blockquote>
    <p>23rd of December 1577</p>
  </blockquote>
  
  <p>as if the Julian -> Gregorian transition was bugged</p>
  
  <p>Any ideas how to overcome that?</p>