Credit where credit is due, developers usually wait until a few days before launch before announcing the release times of a game, but Blizzard is getting ahead of the curve and has already revealed the launch times for Diablo IV, despite the game arriving in two month's time on June 6.
As noted by Blizzard Entertainment president Mike "Qwik" Ybarra on Twitter, Diablo IV will unlock for all in Europe at midnight of its launch day, i.e. 00:00 (on a 24-hour clock) on June 6.
Those in Asia will have to wait until 8:00 local time, and those in the US will get to dive in at 16:00 on June 5.
In terms of Early Access, this will kick off at the same time just on June 2 for Europe and Asia and June 1 for the US.
<social>https://twitter.com/Qwik/status/1643623121398775809</social>
And for those wondering how this will differ on the different platforms, Ybarra also responded to a comment posing this very question, to which it was revealed that the game will launch at the same time on PC, PlayStation and Xbox.