Alapból tiltom a "systemd-timesyncd", rakás fos ( timedatectl ).
## /etc/systemd/timesyncd.conf
systemctl stop systemd-timesyncd
systemctl disable systemd-timesyncd
systemctl mask systemd-timesyncd
rm -rf /etc/localtime
ln -s /usr/share/zoneinfo/Europe/Budapest /etc/localtime
-> install ntpd/chrony