I have a self-built binary at ~/bin/tmux-old dated 2012-09-19, so that provides an upper bound of when I switched from screen. (And to this day I'm still using

I have a self-built binary at ~/bin/tmux-old dated 2012-09-19, so that provides an upper bound of when I switched from screen. (And to this day I'm still using tmux + irssi)