Being a plug-in to Calendar program, Time Zone changes appointment start time so that in current city it corresponds to the time of appointment in its "native" city, which will be selected by user.

This correction provides correct displaying of appointment start time after setting of "native" city as current one in Clock program ("Start/Settings/System/Clock/Time").

Time Zone adds also supplementary text to Location property of the appointment.
This gives a user possibility to see "native" city for the appointment and it's time in this city.