From their newsletter:
Mike is aiming to make active the order page for our deluxe edition of Stephen King’s CARRIE on Saturday 21 June at 9 pm England time. That means it’ll be 1 pm in LA and western Canada; 4 pm in New York and eastern Canada; 10 pm, 11 pm or midnight on mainland Europe; and 4 to 6 am in Australia. I think that pretty much clinches it for fairness but please DO NOT rely on my knowledge of time zones: if you’re in any doubt then I suggest you go online and check out what the time is in YOUR area. There will be a counter on the page when it goes up so that only 26 copies may be purchased. When they’re gone, they’re gone.