While we don't have an exact launch time, we can give some rough estimates for a few time zones. The game will be released world wide at the same time.
West Coast USA - 4pm-5pm, May 8th
East Coast USA - 7pm-8pm, May 8th
UK - 12am-1am, May 9th
Singapore - 12am-1am, May 9th
East Coast Australia - 9am-10am, May 9th
See you at launch!