'Return the timezone name.
Note that the name is 100% informational -- there\'s no requirement that
it mean anything in particular. For example, "GMT", "UTC", "-500",
"-5:00", "EDT", "US/Eastern", "America/New York" are all valid replies.'

def tzname(self):

    name = _call_tzinfo_method(self._tzinfo, 'tzname', self)
    _check_tzname(name)
    return name
