lithium\data\source\database\adapter\PostgreSql::timezone PHP Method

    public function timezone($timezone = null)
    {
        if (empty($timezone)) {
            $query = $this->connection->query('SHOW TIME ZONE');
            return $query->fetchColumn();
        }
        try {
            $this->connection->exec("SET TIME ZONE '{$timezone}'");
            return true;
        } catch (PDOException $e) {
            return false;
        }
    }