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YaST Date and Time
The YaST Date and Time module sets the date and time for your system.
To configure Date and Time, first choose the region you are located in from the left-side. Once your region has been chosen, select a time zone from the right hand side.
Hardware Clock Set To refers to Local Time and UTC. Local time sets the computers internal system clock to the time of the region.
UTC, or Universal Time Coordinated, sets the system clock to the coordinated time. UTC is the atomic realization of Universal Time (UT) or Greenwich Mean Time, the astronomical basis for civil time. Time zones around the world are expressed as positive and negative offsets from UT. UTC differs by an integral number of seconds from International Atomic Time (TAI), as measured by atomic clocks and a fractional number of seconds from UT. The time displayed when your system clock is set to UTC is an offset from your system clock based on your region. The advantage is that NTP, Network Time Protocol, uses UTC. Also, when you change your region, your displayed time changes, but your internal hardware clock does not.
Click on Change next to Time and Date to change the time.