The NonworkingDaysColor property specifies the color being used to fill the non-working days. Use he NonworkingDaysPattern property to specify the brush to fill the nonworking days area. Use the NonworkingDays property to specify the nonworking days. Use the NonworkingDaysPattern property to specify the pattern to fill non-working days. If the NonworkingDaysPattern property is exPatternEmpty or NonworkingDays property is 0 the non-working days are not highlighted. If the NonworkingDaysPattern property includes the exPatternFrame, the NonworkingDaysFrameColor property indicates the color to show the frame around nonworking days.