It goes on sale whenever the retailers open. If it's a brick-and-mortar store, that could be 8 AM. If it's an online store, you may be able to pre-order it and you'll be sent one when it's available. If you can't pre-order then it's up to the website. If they go on local time, it will be midnight, but if they go off Eastern time and you live in Pacific, you'll get an early shot at it.
Good luck getting one it's release date, it'll be tough to find one.