Rendering the TelerikCalendar control produces HTML with ARIA roles like so:
This seems small, but looks bad on accessibility reports, especially when a calendar has 42 'gridcells', The impact is significant when seen in summary.
Alternatively, or in addition, can ARIA roles be turned of for specific controls? In this case including role attributes in the markup is not actually necessary as the roles can be implied by the HTML tags. Including roles that are incorrect is more work for more confusion.