@property<EOL><INDENT>def tz(self):<DEDENT>
<EOL>return getattr(self.dtype, "<STR_LIT>", None)<EOL>
Return timezone, if any.

Returns
-------
datetime.tzinfo, pytz.tzinfo.BaseTZInfo, dateutil.tz.tz.tzfile, or None
    Returns None when the array is tz-naive.