Hi Michael,
The current template is missing two TemplateBindings, you can find attached a project with an improved template that is more consistent with the other controls and has these bindings.
The IsReadOnly now allows the date to be viewed and selected but not edited, while disabling the control does not allow selection in the TextBox or showing the calendar.
I am sorry for any inconvenience,
Regards,
Miroslav
the Telerik team
Check out
Telerik Trainer, the state of the art learning tool for Telerik products.