How To Change Timezone on a CentOS 6 and 7

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I set my time zone to ‘America/New_York’ on a CentOS Linux 7 server. I want to see date and time in my timezone in log files. How can I change the current timezone from ‘America/New_York’ to ‘America/Chicago’ using the command line? How can I change timezone on a CentOS 6 and 7 using the ssh based session?

A time zone is nothing but a region of the globe that observes a uniform standard time for constitutional, business and cultural purposes. In a short time zone refers to the local time of a country. You can easily change timezone in CentOS Linux using the following methods.

CentOS timezone config files and directories

  1. /usr/share/zoneinfo/ – The system timezone directory contains the files as per timezone name. For example, the file /usr/share/zoneinfo/America/New_York represents time zone for New York.
  2. /etc/localtime – It is a symlink to the file localtime or to the correct timezone file in the system located in /usr/share/zoneinfo/ directory.

Change Timezone on a CentOS 6 and 7

Let us see some examples to change timezone or set a new time zone on a CentOS Linux.

How do I see the current time zone on CentOS Linux?

Type the date command or the ls command:
$ date
$ ls -l /etc/localtime

Sample outputs:

Fig.01: Finding current timezone on a CentOS Linux
Fig.01: Finding current timezone on a CentOS Linux

Another option is to type the following command on systemd based distro such as CentOS 7 to see timezone along with the grep command and timedatectl command:
timedatectl
timedatectl | grep -i 'time zone'
date

Commands To See Or Change Timezone on a CentOS 6 and 7 Server

Change the current timezone in CentOS 7

To find list of all available time zones, run:
# timedatectl list-timezones
##*** Grep possible Asian timezones ***##
# timedatectl list-timezones | grep Asia

Sample outputs:

Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara
Africa/Bamako
Africa/Bangui
Africa/Banjul
....
..
America/Dawson
America/Dawson_Creek
America/Denver
America/Detroit
America/Dominica
America/Edmonton
America/Eirunepe
America/El_Salvador
America/Fortaleza
America/Glace_Bay
....
..
Pacific/Saipan
Pacific/Tahiti
Pacific/Tarawa
Pacific/Tongatapu
Pacific/Wake
Pacific/Wallis

The syntax is as follows to set timezone and need to run as root user:
# timedatectl set-timezone time_zone
In this example, set timezone to America/Chicago
# timedatectl set-timezone America/Chicago
Verify new settings by typing the following two commands:
# date
# ls -l /etc/localtime

Sample outputs:

Fig.02: Change the currently used time zone i.e. change timezone on a CentOS 6 and 7
Fig.02: Change the currently used time zone

Change the current timezone in CentOS 6 and older

You need to use the ln command to set timezone on Centos 6. Type the following commands as root:

cp /etc/localtime /root/old.timezone
rm /etc/localtime
ln -s /usr/share/zoneinfo/America/Chicago /etc/localtime

Verify new settings by typing the following two commands:

date
ls -l /etc/localtime

Conclusion

You just learned how to change Timezone on CentOS Linux version 5, 6, and 7. The commands described here should also work with RHEL version 5, 6, and 7. For more info on timezone see this wiki page here. I also suggest that you read the following man pages using the man command:
$ man 1 timedatectl

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

Notable Replies

  1. U can use tzselect command

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Historical Comment Archive

11 comment

  1. Good information. If I reboot the server it reverts to the old time. To make the change permanent I had to:

    vi /etc/sysconfig/clock

    # change value
    ZONE=”/America/Chicago”

    Then after reboot the time change will still apply.

    1. Thanks Mike. I managed to lose the timezone with a yum update. Hopefully this will make it stick.

  2. Thank for posting this Vivek!

    Changing /etc/localtime worked great for me… no need to edit /etc/sysconfig/clock.
    (file doesn’t exist on my Centos 7 minimal install.)

    Cheers!

  3. what needs to set in .bash_profile ?? I want to set SaudiTime zone…I had done changes in /etc/sysconfig/clock and also .bash_profile also with Asia/Riyadh . And when i put .bash_profile it shows lrwxrwxrwx. 1 root root 33 May 23 16:22 /etc/localtime -> ../usr/share/zoneinfo/Asia/Riyadh … But it not reflect when i check with ‘date’ command…Please suggest

  4. Thanks for this. My cron however is still firing at UTC – anything that I am missing? I tried setting CRON_TZ in crontab to Asia/Kolkata. But, that isn’t working either. Any help appreciated. Thanks!

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