To List all timezones:

# timedatectl list-timezones

To set to the new timezone:

# timedatectl set-timezone newtimezone

Sample output:

# timedatectl list-timezones | grep Angeles
# timedatectl set-timezone America/Los_Angeles
# date
Thu Mar 5 11:56:43 PST 2015
# ls -l /etc/localtime
lrwxrwxrwx. 1 root root 41 Mar 5 11:56 /etc/localtime -> ../usr/share/zoneinfo/America/Los_Angeles

To view your current timezone configuration:

# timedatectl status