NTP daemon or ntpd is a program which keeps system time in sync with time servers. If you’re planning to keep your server running long time, it is always good to have ntpd running.
First update system.
yum update -y
Then install required packages.
yum install -y ntp ntpdate ntp-doc
Update NTP pool.
Start ntpd service
systemctl start ntpd
Check status of ntpd to make sure it is running.
systemctl status ntpd
Finally enable service to start on every boot
systemctl enable ntpd
Hope this helps. Stay Awesome !!!