title: NSDateFormatter with 24 hour times
body: <p>I have a countdown timer which countsdown from the current date/time to a specific future date/time. It is working great except for one problem. I input the future date using <code>NSDateFormatter</code> and <code>dateFromString</code>. It doesn't seem to be able to accept any time (hour) over 12 though indicating it is not support 24 hour clock. Is there a way to enable 24 hour clock support or a workaround? Here is some of my code:</p>
  
  <pre><code>NSDateFormatter *df = [[NSDateFormatter alloc] init];
  [df setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
  NSDate *myDate = [df dateFromString:@"2010-03-14 15:00:00"];
  </code></pre>