private string getCurrentStringHoliday(int year, int month)
        {
            int    dayInMonth = DateTime.DaysInMonth(year, month);
            string str        = "";

            for (int i = 1; i <= dayInMonth; i++)
            {
                if (ListHoliday.Contains(i.ToString()))
                {
                    str += "H";
                }
                else
                {
                    str += "W";
                }
            }
            return(str);
        }