jQuery UI Datepicker - Disable specific days

Question

Is there any (easy) way to set the jQuery UI Datepicker to disallow selection of specific, predetermined days?

I was able to get this approach working, however, it p

Answer 1

 var unavailableDates = ["19-8-2014","14-9-2014"];

 function unavailable(date) {
    dmy = date.getDate() + "-" + (date.getMonth()+1) + "-" +date.getFullYear();
    if ($.inArray(dmy, unavailableDates) < 0) {
     return [true,"","Book Now"];
    } else {
  return [false,"","Booked Out"];
  }
 }

 $('#iDate').datepicker({ beforeShowDay: unavailable });

Live Demo: http://jsfiddle.net/vfod0krm/