code: public boolean areAllDaysExcluded ()
    {
      for (int i = 1; i <= MAX_DAYS_IN_MONTH; i++)
      {
        if (isDayExcluded (i) == false)
        {
          return false;
        }
      }
  
      return true;
    }
docs: <p>
  Check if all days are excluded. That is no day is included.
  </p>