Hi David,
If I understand your requirement correctly, then you can change the RadDateTimePicker to show month and year in the following way:
1: Create a form with a RadDateTimePicker and a RadButton
2: Hook up the events for the RadButton click event and form load event.
3: Add the following code
Hope this helps. If this is what you need, please remember to mark as answer. If you need further help, just let me know
Thanks
Richard