Abstract: Embodiments of the present invention address deficiencies of the art in respect to recurring events in a C&S system and provide a novel and non-obvious method, system and computer program product for editing an event in a C&S system. In one embodiment, a method for editing an event in a C&S system can include specifying a recurrence range before permitting editing of the event. The method further can include disposing an in-line disambiguating message in a calendar dialog for the C&S system indicating whether an event instance or whether all instances of the event are to be edited in the calendar dialog. The method yet further can include limiting actions in a user interface in response to limiting a core engine for the C&S system. Specifically, limiting actions in a user interface in response to limiting a core engine for the C&S system can include permitting only an editing of a single instance for the event in response to an attendee exception.