Abstract: The invention is concerned with the improvement of electronic organisers (10), in particular with those organisers (10) which give the user a message at a time before an appointment. To accomplish this, an electronic organiser (10), a calendar (11) in which appointments can be set at least according to place, date and time, a module (16) for determining geographical positions and an assembly (17) for the ascertainment and output of distances are required. Moreover the organiser (10) with an interface (12) can exchange data with the module (16) and the assembly (17). If an appointment is entered in the calendar (11), the data connected with this appointment are transmitted to the assembly (17). Depending on the geographical position, the period of time for reaching the appointment is then calculated by means of the assembly (17) and, if the instantaneous time plus the calculated period of time corresponds to the data of the appointment, the user is given a signal.