Selecting non continuous dates in a calendar control

I want to be able to select non continuous dates in a calendar control, is this possible in any of the standard m/s controls ? or does anyone know of a control that can be purchased (or is preferably free) that will allow me to do this.

As an indication of what I am trying to do is to allow a manager of a shop to assign staff to different days of the week in one go, without having to go into each day of the week on the calendar.

Thanks
   Steve