According to https://wiki.gentoo.org/wiki/Handbook:AMD64/Full/Installation#Timezone, for openrc: "The desired timezone name can be written to /etc/timezone: root #echo "Europe/Brussels" > /etc/timezone Finally, the sys-libs/timezone-data package can be reconfigured - updating /etc/localtime, based on the /etc/timezone entry: root #emerge --config sys-libs/timezone-data" On a fresh system, localtime was already a symlink and setting the timezone to /etc/timezone followed by emerge --config sys-libs/timezone-data didn't have any effect.
Thanks for reporting! This is resolved in https://wiki.gentoo.org/index.php?title=Handbook:Parts/Installation/Base&diff=prev&oldid=1316644 Fix by zen_desu and dev approved guidance from floppym.
Thank you very much