A system and method to integrate a service in a calendar application. A service integration module and a calendar application may be installed on a client computing device. The service integration module may have read and write access to the calendar application of the client computing device and may submit a service request to a remote service. The service request may be a call of a first web service interface of the service and may initiate the execution of the service which may generate a result. The service integration module may receive the result. The service integration module may process the result, which may include extracting data required for specifying an event in an electronic calendar of the calendar application. The service integration module may create, delete, or modify an event in the electronic calendar of the calendar application.