In order to change the system timezone, there are 6 simple steps you need to follow:
/etc/sysconfig/clock. It’s up to you if you’d like
UTC to be false or true.
2. Edit /etc/php.ini
date.timezone = Europe/London
3. Update system time. If you are running it on a cloud server, second command is not required.
tzdata-update hwclock --systohc
4. Restart all effected services, including MySQL if necessary.
service crond restart service rsyslog restart service syslog restart service httpd restart service mysqld restart
service ntpd stop ntpdate 0.centos.pool.ntp.org service ntpd start
date to confirm date was changed on your server.