Thanks for ur reply, actually its working but there is a problem, on page load its not showing any highlight, but if we click on the radscheduler calender ( means there is a built in calendar is scheduler) it will highlight the appointments on calender eg i have an appointment on 8-10-2009, and 10-10-2009, so first it highlight the today's date & if we select another day it will highlight 8-10-2009 , then if move once more it will show 10-10-2009 like this one by one ,i want all dates selected . So what to do? :(