$my_date=mysql_fetch_........
list($date,$time)=split(" ",$my_date);
list($year,$month,$day)=split("-",$date);
list($hour,$minute,$sec)=split(":",$time);
$stamp= mktime($hour,$minute,$sec,$month,$day,$year)+($разница в часах*3600);
$real_date=date("Y-m-d H:i:s",$stamp);