def set_system_date_time(years=None,
                         months=None,
                         days=None,
                         hours=None,
                         minutes=None,
                         seconds=None):
    '''
    Set the system date and time. Each argument is an element of the date, but
    not required. If an element is not passed, the current system value for that
    element will be used. For example, if you don't pass the year, the current
    system year will be used. (Used by set_system_date and set_system_time)

    Args:

        years (int): Years digit, ie: 2015
        months (int): Months digit: 1 - 12
        days (int): Days digit: 1 - 31
        hours (int): Hours digit: 0 - 23
        minutes (int): Minutes digit: 0 - 59
        seconds (int): Seconds digit: 0 - 59

    Returns:
        bool: ``True`` if successful, otherwise ``False``

    CLI Example:

    .. code-block:: bash

        salt '*' system.set_system_date_ time 2015 5 12 11 37 53
    '''
    # Get the current date/time
    try:
        date_time = win32api.GetLocalTime()
    except win32api.error as exc:
        (number, context, message) = exc.args
        log.error('Failed to get local time')
        log.error('nbr: %s', number)
        log.error('ctx: %s', context)
        log.error('msg: %s', message)
        return False

    # Check for passed values. If not passed, use current values
    if years is None:
        years = date_time[0]
    if months is None:
        months = date_time[1]
    if days is None:
        days = date_time[3]
    if hours is None:
        hours = date_time[4]
    if minutes is None:
        minutes = date_time[5]
    if seconds is None:
        seconds = date_time[6]

    try:
        class SYSTEMTIME(ctypes.Structure):
            _fields_ = [
                ('wYear', ctypes.c_int16),
                ('wMonth', ctypes.c_int16),
                ('wDayOfWeek', ctypes.c_int16),
                ('wDay', ctypes.c_int16),
                ('wHour', ctypes.c_int16),
                ('wMinute', ctypes.c_int16),
                ('wSecond', ctypes.c_int16),
                ('wMilliseconds', ctypes.c_int16)]
        system_time = SYSTEMTIME()
        system_time.wYear = int(years)
        system_time.wMonth = int(months)
        system_time.wDay = int(days)
        system_time.wHour = int(hours)
        system_time.wMinute = int(minutes)
        system_time.wSecond = int(seconds)
        system_time_ptr = ctypes.pointer(system_time)
        succeeded = ctypes.windll.kernel32.SetLocalTime(system_time_ptr)
        if succeeded is not 0:
            return True
        else:
            log.error('Failed to set local time')
            raise CommandExecutionError(
                win32api.FormatMessage(succeeded).rstrip())
    except OSError as err:
        log.error('Failed to set local time')
        raise CommandExecutionError(err)