<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def local_timezone(self):
 """Returns the name of the local timezone."""

        if self._local_tz.zone in pytz.all_timezones:
            return self._local_tz.zone

        return self.timezone