Or, because that may require too much open heart surgery, prevent the keyboard focus to enter the calendar menu item at all, and just let the user navigate between "regular" items, up to the "Time & Date Settings..." one for example.
Or, because that may require too much open heart surgery, prevent the keyboard focus to enter the calendar menu item at all, and just let the user navigate between "regular" items, up to the "Time & Date Settings..." one for example.