A social and/or notice board and is not so much for discussing Grahams work, or related topics as covered by the other boards, but more like a place where people can share other things.
Apparently something interesting happened on this date. A large number of people who post or respond on the forum boards here have the same date of registration being July 22nd, 2015. With the timestamps being either 18:18 or 18:19. Yet some of them also have postings far older than that, several years before that date.
Some kind of crash and a database recovery?