Chapter 29. Date and Time Configuration
The Time and Date Properties Tool allows the user to change the system date and time, to configure the time zone used by the system, and to setup the Network Time Protocol (NTP) daemon to synchronize the system clock with a time server.
You must be running the X Window System and have root privileges to use the tool. There are three ways to start the application:
From the desktop, go to Applications (the main menu on the panel) => System Settings => Date & Time
From the desktop, right-click on the time in the toolbar and select Adjust Date and Time.
Type the command system-config-date, system-config-time, or dateconfig at a shell prompt (for example, in an XTerm or a GNOME terminal).