Garry Newman is the founder and admin of Facepunch. He also developed Garry's Mod and runs Facepunch Studios, a video game development company based in his hometown of Walsall, UK. As garry is the first member registered, his join date is the date the forums were created, however on Facepunch, his join date is marked as September 11, 2001.
It is customary for every banned user to be unbanned on Garry's Birthday (May 20). This stopped in around 2008, but returned in 2013 which marked the return of more notable users such as Hezzy and Firerain.