If you are using a GNU/Linux distribution based on Ubuntu the easiest way to get the timezone is by using following command:
timedatectl
The output should look similar to this:
Local time: Tue 2018-07-24 11:27:00 CDT
Universal time: Tue 2018-07-24 16:27:00 UTC
RTC time: n/a
Time zone: America/Mexico_City (CDT, -0500)
Network time on: yes
NTP synchronized: yes
RTC in local TZ: no
As you can see, this server is on the America/Mexico_City timezone.
That’s it, see you next time!
Alex Arriaga