An end-user enters time sensitive information into an application; this, for example, may be an entry (e.g. ‘meeting’, or ‘lunch with Bob’) against specific times in an agenda or calendar application. Then, a different application on the device can utilize that information to modify the device behaviour appropriately. For example, say the ‘meeting’ in the calendar application is listed to last between 10 am and 11 am; then, during that hour, the telephone application in the device (that enables telephone functions of the device to be controlled) could automatically be set to a ‘silent’ profile so that the device does not ring on an incoming call, but instead only vibrates.