A time zone is a region on Earth that has a uniform standard time for legal, commercial, and social purposes. It is convenient for areas in close commercial or other communication to keep the same time, so time zones tend to follow the boundaries of countries and their subdivisions.
How to do that into Linux OS?
# dpkg-reconfigure tzdata
It changes /etc/localtime …
You will see this window to setup your localtime.
Another way to change the localtime it’s:
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean.
4) Arctic Ocean
6) Atlantic Ocean
9) Indian Ocean
10) Pacific Ocean
11) none - I want to specify the time zone using the Posix TZ format.
and select your local time by region …