Used the following command to change timezone on 20.04:
sudo timedatctl set-timezone PST //PT has same error
But receiving error of invalid time zone or missing (strange!).
Did the following:
sudo apt-get install pst-utils
But the error is the same. What is the right way to install pacific time?
Try
sudo timedatectl set-timezone US/Pacific
pst-utils
package has nothing to do with timezones. It's about working with Microsoft Outlook PST files. You can safely uninstall it.