@property<EOL><INDENT>def end_at(self):<DEDENT>
return self._end_at<EOL>
Gets the end_at of this Shift.
RFC 3339; shifted to timezone + offset. Precision up to the minute is respected; seconds are truncated. The `end_at` minute is not counted when the shift length is calculated. For example, a shift from `00:00` to `08:01` is considered an 8 hour shift (midnight to 8am).

:return: The end_at of this Shift.
:rtype: str