Question: How to change date and time on my Ubuntu or Kubuntu laptop ?
Answer: You can change the date and time from the ‘Time and Date Settings window’ that can be launched using one of the following two methods.
Method 1: Launch From System Tray
Right click on the date and time that is displayed on your system tray and select ‘Adjust Date & Time’ as shown below.
After modifying the date and time from the following window, click on ‘Set System Time’, which will ask for root user password before saving the values.
Method 2: Launch From System -> Administration
If you don’t have the date & time displayed in the system tray, Click on System -> Administration -> Time and Date.
By default, this will show the date and time in the locked mode. Click on Unlock and then give the sudo user password. After unlocking you can change the date and time as shown below.