Dylan, useful idiot with commit access, pushed age verification PRs to systemd, Ubuntu & Arch, got 2 Microslop employees to merge it, called it 'hilariously pointless' in the PR itself, then watched Lennart personally block the revert. Unpaid compliance simp.
Linux has similar fields for realName, emailAddress, location, timezone and more. But like birthdate, I think they’re all optional.
No Linux as such was not, by the time Linux got popular the big multiuser systems were on their way out. I still worked on those in college. But they were SGI, HP-UX and Sequent. Especially the latter were huge systems.
But these fields were just a clone of what was in the original Unix systems.