In previous versions of RHEL and CentOS we have has a myriad of small command to manage the date and time elements, date, time, tzselect and hwclock. Now much of these features are amalgamated in the the systemd command timedatectl. Setting the time or date can be managed with timedatectl as it could with the date command; however the format is simplified and sets both the system time and the hardware clock with the one setting It is also possible to set the timezone with the command too and no need for tzselect.
timedatectl #to display time and date information timedatectl set-time 2014-07-19 #to set date timedatectl set-time 15:12:00 #to set time timedatectl set-timezone Europe/London #to set TZ
The video will help you through the process