Thank you for your question.
For the moment we do not provide such functionality for RadCalendar. You may consider using RadScheduler instead. You may find usage demonstration about RadScheduler here:
More specific information about RadScheduler you may find here:
If you have more questions, feel free to contact us.
the Telerik team
Register for the Q2 2011 What's New Webinar Week. Mark your calendar for the week starting July 18th and book your seat for a walk through of all the exciting stuff we will ship with the new release!