If you are using Fedora / RHEL / Cent OS Linux
Type the redhat-config-date command at the command line to start the time and date properties tool.
# redhat-config-date
OR type setup and select time zone configuration (good for remote ssh text based Linux server sessiob)
# setup
Now, just follow on screen instructions to change timezone
Set timezone using /etc/localtime configuration file [any Linux distro]
Often /etc/localtime...
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