Proceed as pi.
Update the package list
sudo apt-get update
ntpdate install
sudo apt-get install ntpdate
Registration on a daily cron to run
sudo nano /etc/cron.daily/sync-date.sh
It should look like this:
ntpdate -u 3.kr.pool.ntp.org
Excute ‘chmod’.
sudo chmod 755 /etc/cron.daily/sync-date.sh
“3.kr.pol.ntp.org” site is Korea Time.
For a time in another country, please visit here.