def dbStore(self, typ, py_value):
        """
        Prepares to store this column for the a particular backend database.

        :param backend: <orb.Database>
        :param py_value: <variant>

        :return: <variant>
        """
        if isinstance(py_value, datetime.datetime):
            # ensure we have some timezone information before converting to UTC time
            if py_value.tzinfo is None:
                # match the server information
                tz = pytz.timezone(orb.system.settings().server_timezone)
                py_value = tz.localize(py_value)
            return py_value.astimezone(pytz.utc).replace(tzinfo=None)
        else:
            return super(DatetimeWithTimezoneColumn, self).dbStore(typ, py_value)