Подозрение на непаравильную работу функции даты в API

$DataBase = & singleton('DataBase');
$DateClass =& singleton ('DateClass');
$query = "SELECT * FROM `shop_items_catalog_table` WHERE `shop_shops_id` =1
    and shop_items_catalog_putend_date > ".date('U')." LIMIT 1";
$result = $DataBase->query($query);
if ($result)
{
    while($row = mysql_fetch_assoc($result))
    {
   $date = $row['shop_items_catalog_putend_date'];
        echo $bd_date=$DateClass->DateSqlToUnix($date);
        echo "<br />";
        echo time();
        echo "<br />";        
        echo $new_date= $bd_date - time();
   }
}