On Centos 7, we first determine our local time by selecting the region, then we update the time of our local region to NTP services by installing the NTP service.

Let's perform the following steps in order.

timedatectl set-timezone Europe/Istanbul
firewall-cmd --add-service=ntp --permanent
firewall-cmd --reload
yum install ntp -y
systemctl start ntpd
systemctl enable ntpd
ntpdate -q 0.tr.pool.ntp.org 1.tr.pool.ntp.org
timedatectl set-ntp true
date

Good work..