def _format_strings(self):
values = self.values<EOL>if not isinstance(values, DatetimeIndex):<EOL><INDENT>values = DatetimeIndex(values)<EOL><DEDENT>if self.formatter is not None and callable(self.formatter):<EOL><INDENT>return [self.formatter(x) for x in values]<EOL><DEDENT>fmt_values = format_array_from_datetime(<EOL>values.asi8.ravel(),<EOL>format=_get_format_datetime64_from_values(values,<EOL>self.date_format),<EOL>na_rep=self.nat_rep).reshape(values.shape)<EOL>return fmt_values.tolist()<EOL>
we by definition have DO NOT have a TZ