Basically the required functionality is not supported and there is no inbuilt mechanism which could be used for achieving this functionality.
There is possible custom approach that is to use the OnColumnHeaderClick
client-side event and get the column index as shown here
. After that on CalendarViewChanged event you could force the row header click based on this index. I hope this helps as starting point in your custom implementation.
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed