Read it carefully. He's very cryptic, but he states that the games will sell at midnight local time (that's obvious). Then, you will get to create your guardian and spend time together (notice how he didn't say play). You'll be able to make your guardian, but not play, since the servers, as he stated, don't know the difference between timezones. Therefore, you'll have to wait until 12 am on 9/9 PST to play.