Select Code to Download

i/p
31: req time is  2006-05-17 12:00:00
...
431: date 1 is 2006-05-17 13:00:00
but the final value I get is 
2006-05-23 14:00:00

$req_time = got value from db;
($date,$time) = split(/ /, $req_time);
...
    $req_date = timelocal($sec, $min, $hour, $day, --$month, $year); 
$rtime = $req_date + 1*60*60;
 my $date1 = strftime '%Y-%m-%d %H:%M:%S', localtime $rtime;