There are several methods to check and update the timezone on your Linode. Just for clarity, I'll be using America/New_York as my example timezone. If you aren't sure of the naming for your timezone, you can find a list with the following command, or on the following URL:

ls /usr/share/zoneinfo/

https://en.wikipedia.org/wiki/List_of_tz_database_time_zones

In order to check the current timezone your Linode is using, depending on your operating system, and which method of setting the timezone was used, you can use the following commands:

cat /etc/timezone

ls -l /etc/localtime

printenv | grep TZ

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There are also a few methods for setting the timezone, also depending on your operating system and preference:

sudo dpkg-reconfigure tzdata

echo America/New_York > /etc/timezone

ln -s /usr/share/zoneinfo/America/New_York /etc/localtime

export TZ=America/New_York