The embodiments provide a data processing apparatus including a graphics controller configured to obtain a subset of selected time zones among a plurality of available time zones and generate a plurality of clock objects. Each clock object may be a graphical representation of a different time zone of the selected subset, and each clock object may provide a visual graphical indicator for a respective time zone. The data processing apparatus may include a user interface configured to display an arrangement of the plurality of clock objects and receive a command shifting to a travel mode time. The graphics controller may be configured to update the plurality of clock objects according to the command including providing an updated local time corresponding to the travel mode time for each selected time zone and adjusting the visual graphical indicator according to the updated local time for each selected time zone.