Scalr_Util_DateTime::convertTimeZone PHP Method

    public static function convertTimeZone(DateTime $dt, $remoteTz = NULL)
    {
        if (is_null($remoteTz)) {
            $remoteTz = date_default_timezone_get();
            if (!is_string($remoteTz)) {
                return $dt;
            }
        }
        if (!$remoteTz instanceof DateTimeZone) {
            $remoteTz = new DateTimeZone($remoteTz);
        }
        $dt->setTimezone($remoteTz);
        return $dt;
    }

 private function getBackupsList($time = '')
 {
     $data = array();
     $time = $time == '' ? time() : strtotime($time);
     $query = "\n            SELECT b.id AS backupId, b.farm_id AS farmId, b.service AS serviceName, b.dtcreated AS time, f.name AS farmName\n            FROM `services_db_backups` b\n            LEFT JOIN `farms` f ON b.farm_id = f.id\n            WHERE b.status = ? AND b.env_id = ?\n            AND DATE_FORMAT(CONVERT_TZ(b.dtcreated, 'SYSTEM', ?), '%Y-%m') = ?\n        ";
     $userTimezone = $this->user->getSetting(Scalr_Account_User::SETTING_UI_TIMEZONE);
     if (empty($userTimezone)) {
         $userTimezone = 'SYSTEM';
     }
     $args = array(Scalr_Db_Backup::STATUS_AVAILABLE, $this->getEnvironmentId(), $userTimezone, date('Y-m', $time));
     if ($this->getParam('farmId')) {
         $query .= ' AND b.farm_id = ?';
         $args[] = $this->getParam('farmId');
     }
     if (!$this->request->isAllowed(Acl::RESOURCE_FARMS, Acl::PERM_FARMS_NOT_OWNED_FARMS)) {
         $query .= " AND f.created_by_id = ?";
         $args[] = $this->user->getId();
     }
     $dbBackupResult = $this->db->GetAll($query, $args);
     foreach ($dbBackupResult as $row) {
         $dt = new DateTime($row['time']);
         Scalr_Util_DateTime::convertTimeZone($dt, $this->user->getSetting(Scalr_Account_User::SETTING_UI_TIMEZONE));
         $row['time'] = $dt->format('h:ia');
         if (empty($row['farmName'])) {
             $row['farmName'] = '*removed farm*';
         }
         $data[$dt->format('j M')][] = $row;
     }
     return $data;
 }