Operator '&&' cannot be applied to operands of type 'System.Collections.Generic.IEnumerable<char>' and 'System.Collections.Generic.IEnumerable<char>' : While executing below code, getting this error:

>Operator '&&' cannot be applied to operands of type 'System.Collections.Generic.IEnumerable(char)' and 'System.Collections.Generic.IEnumerable(char)'	

        public ActionResult HolidayIndex()
        {
            IEnumerable<HOLIDAY_MASTER> hdms = null;
            hdms = db.HOLIDAY_MASTER.ToList().Where(h => h.HOLIDAY_NAME.Except("Sunday") && h.HOLIDAY_NAME.Except("Saturday") && h.HOLIDAY_DEL.Equals(0) && h.REGION_ID.Equals(RegionID)).OrderBy(h => h.DOH);
            return PartialView("HolidayIndex", hdms);           
        }

Error shows under `h.HOLIDAY_NAME.Except("Sunday") && h.HOLIDAY_NAME.Except("Saturday")`.
        