1. A method in a mobile communication device of processing calendar information, the method comprising the acts of: receiving and storing calendar information for an appointment in a calendar application of the mobile communication device, the calendar information indicating a date and time of the appointment; identifying whether the calendar information includes call appointment information for the appointment which comprises a call appointment with use of the mobile communication device; identifying, at the mobile communication device, whether a radio frequency (RF) out-of-coverage condition exists between the mobile communication device and a wireless communication network within a predetermined time period from the date and time of the appointment; if the RF out-of-coverage condition is identified within the predetermined time period and the call appointment information is identified to be included in the calendar information: causing an RF out-of-coverage warning indication to be produced in association with the appointment at a user interface of the mobile communication device; if the RF out-of-coverage condition is identified within the predetermined time period but the call appointment information is not identified to be included in the calendar information: refraining from causing the RF out-of-coverage warning indication to be produced in association with the appointment at the user interface; and at the date and time of the appointment: causing a calendar reminder indication for the appointment to be produced at the user interface as a reminder of the appointment.