- In Ubuntu click on System and then on Administration.

- Move down and click on Time and Date.

- You'll most likely have to enter your administrative password.

- Now you can

adjust your time zone

by clicking on the map or by finding a city that's in your time zone.

- Set the date if it's incorrect.

- Next check to make sure the time is correct.

- You can set the time manually or have it use Internet time servers.

- Click Close and you're done.