title: NSDateComponent setHour is not setting correctly
body: <p>I am trying to create a date with the time set to 12:00:01 am.  Seconds and minutes set to their values correctly but the hour value always goes to whatever i set the value, + 4.  Why 4?  What is so special about that value?  The minute and second values set to what I want correctly but it appears the hours value simply adds rather than replaces.</p>
  
  <p>here is the code, </p>
  
  <pre><code>        NSDate *now = [NSDate date];
          NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
          NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:now];
          [components setHour:0];
          [components setMinute:0];
          [components setSecond:1];
  
          NSDate *compareTime = [calendar dateFromComponents:components];
          NSLog(@"compareTime: %@", compareTime);
          NSLog(@"currentTime: %@", now);
  </code></pre>
  
  <p>output is :</p>
  
  <p>compareTime: 2013-05-17 04:00:01 +0000</p>
  
  <p>currentTime: 2013-05-17 15:00:37 +0000</p>