Not sure if this is a safe or even effective thing to do but if you change your region under time and location settings then the game can be set to release up to 32 hours early (north east - New Zealand) I did it and now my game says to be released on 9/22 at 0800. I won’t be doing this since I have class all day but for those of you with cojones this could be a neat little trick.
Not sure why the devs - in all their amazingly awesome decisions with FH3 - chose to make the game to unlocking at midnight per region not for a set time (say 12am est 9/23)