archlinux how old is your installation

on archlinux, to see when you installed arch on your computer, run this command

sed -n "/ installed $1/{s/].*/]/p;q}" /var/log/pacman.log

it will display the date and the time when you ran pacstrap on the live cd to install your system.

on my laptop, i get [2018-10-21 21:05], which is when i switched from fedora back to arch because my school required fedora.