It is best practice to always set server date/time to UTC. In debian in order to configure your time and set it to UTC, do as follow:

sudo dpkg-reconfigure tzdata

Now select None of the above or Etc and then press OK. Now select UTC. You're done.

To check your server date/time issue date command:

root@serv01:~# date
 Mon Mar  5 11:20:59 UTC 2018

#date #dpkg-reconfigure #tzdata #UTC #timezone