root@ubntzfs:~# date
Fri May 27 00:53:39 UTC 2016
root@ubntzfs:~# cat /etc/timezone
Canada/Newfoundland
root@ubntzfs:~# dpkg-reconfigure --frontend noninteractive tzdata

Current default time zone: 'Etc/UTC'
Local time is now:      Fri May 27 00:54:55 UTC 2016.
Universal Time is now:  Fri May 27 00:54:55 UTC 2016.

root@ubntzfs:~#