可以调用这个 fields.datetime.context_timestamp,在context里面写入tz
    def context_timestamp(cr, uid, timestamp, context=None):<br />        """Returns the given timestamp converted to the client's timezone.<br />           This method is *not* meant for use as a _defaults initializer,<br />           because datetime fields are automatically converted upon<br />           display on client side. For _defaults you :meth:`fields.datetime.now`<br />           should be used instead.<br /><br />           :param datetime timestamp: naive datetime value (expressed in UTC)<br />                                      to be converted to the client timezone<br />           :param dict context: the 'tz' key in the context should give the<br />                                name of the User/Client timezone (otherwise<br />                                UTC is used)<br />           :rtype: datetime<br />           :return: timestamp converted to timezone-aware datetime in context<br />                    timezone<br />        """