This option show/hide the week by setting the property CalendarComponent.SHOW_WEEK to true/false.
The code below shows how to show/hide the week: 
<CODE>
CalendarComponent calendarComponent = new CalendarComponent();
//    show week
calendarComponent.setCalendarProperty(CalendarComponent.SHOW_WEEK, new Boolean(true));
//    hide week
calendarComponent.setCalendarProperty(CalendarComponent.SHOW_WEEK, new Boolean(false));
</CODE>