Currently, the Calendar that is used in ThemeBuilder is considered "infinite", where we can change the months by scrolling. However, in Telerik UI for Blazor, the only calendar available is the "modern" one, which uses arrow buttons to change months. As a result, some of the styles we apply to the calendar templates in ThemeBuilder don't work with this calendar. Additionally, we are unable to style certain elements, like the arrow buttons, using ThemeBuilder.

Consider exposing templates for a "modern" Calendar component.