Click the clock on the top bar and go into the Date and Time Settings to alter the date/time.
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# Change the date and time

If the date and time displayed on the top bar are incorrect or in the wrong format, you can change them:

Click on the clock in the middle of the top bar and select Date and Time Settings.

You may need to click Unlock and type the admin password.

Adjust the date and time by clicking on the arrows to choose the year, day, hour and minute. You can choose the month from a drop-down list.

If you like, you can have the clock update itself automatically by switching Network Time on.

When Network Time is switched on, the computer will periodically synchronize its clock with a very accurate clock on the internet, so you don't have to do it manually. This will only work if you are connected to the internet.

You can also change how the hour is displayed by switching the 24-hour format on or off.