title: NSDate and TimeZone Issues
body: <p>I am trying to get my app to fire a notification based off a scheduled event.  The date given is from a schedule that will take place in EST.  The time given is Fri Feb 21 2014 12:00:00 -0500 (Noon EST).</p>
  
  <p>When the button to schedule a notification is pressed, it runs this code:</p>
  
  <pre><code>NSString *message = [@"15 minutes until " stringByAppendingString:self.thetitle];
                  NSLog(@"original%@", self.thedate);
          NSDate *newDate = [self.thedate dateByAddingTimeInterval:-60*15];
          NSDateFormatter *formatter3 = [[NSDateFormatter alloc] init];
  
          // [formatter3 setTimeZone:[NSTimeZone timeZoneWithName:@"GMT"]];
          [formatter3 setTimeStyle:NSDateFormatterShortStyle];
          [formatter3 setDateStyle:NSDateFormatterShortStyle];
          NSString *detailstext = [formatter3 stringFromDate:newDate];
          NSDate *othernewdate = [formatter3 dateFromString:detailstext];
          NSLog(@"other%@", othernewdate);
          UILocalNotification *notification = [[UILocalNotification alloc] init];
      notification.timeZone = [NSTimeZone systemTimeZone];
          notification.fireDate = othernewdate;
          notification.alertBody = message;
          notification.soundName = UILocalNotificationDefaultSoundName;
          notification.hasAction = YES;
          notification.alertAction = NSLocalizedString(@"View", @"View notification button");
  
          [[UIApplication sharedApplication] scheduleLocalNotification:notification];
  </code></pre>
  
  <p>Since the time being set on the notification fireDate is the othernewdate, I ran an NSLog in the console to see what it showed.  It came back:</p>
  
  <pre><code>2014-02-21 16:45:00 +0000
  </code></pre>
  
  <p>This seems to be perfect, because that time in EST would be 11:45 AM, or 15 minutes before noon, which is what I wanted.</p>
  
  <p>The issue is this:
  I am testing this in CST.  I run the app, tell it to schedule a notification for this event, and then change my phone clock to be EST and it ends up firing the notification at 10:45.  </p>
  
  <p>There will be people using this app from different time zones, and then traveling to EST for when the conference that this app is for starts.  I don't want them to schedule lots of notifications while in a different time zone and have it fire at the wrong time.  Any suggestions?</p>