We’re only a few days away from Diablo 4’s second anniversary! June 6th, 2023, saw the game’s launch, and we know there will be some sort of in-game event to celebrate it. Blizzard denote the full release as the anniversary, not the early access on June 1st.
What Event?
We have two official pieces of info from Blizzard regarding an anniversary event. The first is from the big 2025 roadmap. Here we see the anniversary marked at the bottom.

Now, that doesn’t signify that there will be a special event. Considering where it’s placed, it’s on a similar level as the Berserk collaboration, which did have an in-game element, but a small one. So at the very least, we’ll be getting something like the currently ongoing Berserk collaboration. This is further confirmed by Blizzard’s comments during the Season 9 Campfire Chat, where they mentioned there’s a new event Reliquary coming after the current Berserk one.
So, we’re definitely getting a Reliquary for the anniversary, but what else can we expect? Well, there’s been nothing official mentioned, but there are some things we can assume. Last year we got the March of the Goblins event, so we may be seeing a reprise with the Reliquary kicker. The event incorporated Mother’s Blessing, as well as gifts from the shop.

We may be getting something different, however, like the recent Lunar Awakening shrine event. Considering how short Season 8 is, we may also see something more major, offering players a lot of loot.
Whatever it is, we’ll find out soon enough, as there’s only a week to go until it starts!