Wow. I think one of the coolest things about this, is seeing a GitHub repo with some of the commits being from 12 years ago. Gives you an idea of how long PHP's been around as compared to a lot of the projects floating around GH.
https://github.com/python-git/python/commit/463d099321a4572e...
(Current first page: https://github.com/python-git/python/commits/master?page=117... )
Perl - first commit, 24 years ago
Amazing title: a "replacement" for awk and sed
https://github.com/mirrors/perl/commit/8d063cd8450e59ea1c611...
(Current first page: https://github.com/mirrors/perl/commits/ams/no-more-study?&#... )
Apparently the current Linux kernel repositories don't go back as far: http://kerneltrap.org/node/13996
I wouldn't be surprised if it makes much less sense for the kernel, though.