Abstract: A method and cellular telecommunication apparatus for displaying the local time. The apparatus is provided with an internal clock, which indicates time in at least hours and minutes. The apparatus is also provided with display means for displaying time, and control means for calculating the local time based on information about local time data. Upon activation of the apparatus, it establishes a wireless connection to a cellular network, wherein the time is displayed on the display means. The apparatus sends a request to the network, which comprises a question about local time data. In response to the request, the network sends a response back to the apparatus. The response comprises information about local time data. The control means calculates the time difference between the internal clock and the local time data, and changes the indication of hours in the display means based on the time difference.