Pre-order players will be able to get early access to the expansion starting on June 16th regardless of the edition pre-ordered; players who pick up the digital or physical CE will also have a variety of additional in-game bonuses to boot. There’s a thread available to answer common questions for players who want to know when they can unlock Red Mage (and presumably the other new job-or-jobs), so it’s worth a glance if you’re on the fence about pre-ordering.
(North America) Stormblood Collector's Edition pre-orders will begin at 12pm (PT)/3pm (ET) on the Square Enix Online Store! #FFXIV pic.twitter.com/vFHgVIt4n1
— FINAL FANTASY XIV (@FF_XIV_EN) January 24, 2017
Source: Official Site