Somehow, some way, it’s that time again. Just a few months removed from hoisting the Larry O’Brien trophy, the Warriors will reconvene for the first official team gathering of the 2017-18 season this Friday for Media Day, presented by Kaiser Permanente. Media Day, which tips off at 11:00 a.m., marks the unofficial start to the new season, with training camp, preseason games and eventually Opening Night soon to follow.