def METHOD_NAME(datestr):
    """
    Parse HydroShare (HS) formatted datetime (without timezone information) from a String
    to a datetime.datetime.
    :param datestr: String representing the date in HS format (without timezone information)
    :return: datetime.datetime with timezone set to UTC
    """
    m = HS_DATE_NOTZ_RE.match(datestr)
    if m is None:
        msg = "Unable to parse date {0}.".format(datestr)
        raise HsDateException(msg)
    try:
        ret_date = datetime.datetime(year=int(m.group('year')),
                                     month=int(m.group('month')),
                                     day=int(m.group('day')),
                                     hour=int(m.group('hour')),
                                     minute=int(m.group('minute')),
                                     second=int(m.group('second')),
                                     tzinfo=tz.UTC)
    except Exception as e:
        msg = "Unable to parse date {0}, error {1}.".format(datestr,
                                                            str(e))
        raise HsDateException(msg)
    return ret_date