Diablo 3 Season 37 wraps up soon, so get ready for Season 38: Season of Ethereal Memory launching on March 27

Diablo 3 Season 37 kicked off our second return of the Forbidden Archives theme on December 5, 2025, arguably to much delight. Players love the opportunities afforded in Kanai’s Cube-o-Rama — releasing the restrictions of gear type on the three cube slots leads to all sorts of wild combinations, like two additional weapon powers or stacking the Focus/Restraint ring duo with a Ring of Royal Grandeur and a class-specific piece of jewelry. But all good things come to an end, leading us to the inevitable question — when does Season 37 end, and Season 38 start?

Blizzard has now confirmed that Diablo 3 Season 37 will end Sunday, March 22, 2026, and Diablo 3 Season 38: Ethereal Memory will start Friday, March 27, 2026 at 5pm pacific (8pm eastern). For more details on the season’s Ethereal Memory mechanic, read our writeup on Ethereal weapons.

Our original estimated date for the end of Diablo 3 Season 37 passed us by, but Blizzard has announced the Season 38 details, including the Ethereal Memory theme where we bear powerful ethereal weapons, originally in tribute to Diablo 2!

Somehow, we’re back at the longer end of the D3 seasonal spectrum, clocking in at 15 weeks and 2 days. We’re not breaking any historical records, but 107 days does not a quarter make, when the Diablo 3 team announced the title’s seasons would follow a standard quarterly schedule when it entered maintenance mode in Season 30 (accompanied by a randomly selected returning theme). They started out consistently — Seasons 30 and 31 both ran for 12 weeks and 2 days, while Season 32 extended a bit, adding two weeks to the runtime to account for both a PTR period and the launch of Diablo 4’s first expansion, Vessel of Hatred.

However, the 2025 seasonal schedule had some hiccups: first, Season 33 accidentally ended two weeks early. That was resolved (with a few hiccups to the player experience); next Blizzard shifted the original start date of Season 34 back a week, a well-timed shift that was announced just two days before it was scheduled to launch. But then Season 34 ran for four months. Season 35 put things back on track, running for exactly 13 weeks and 2 days (roughly a quarter of the year). Season 36 continued to trend us closer to a normalized schedule, falling just shy of a quarter at 11 weeks and 2 days.

Season 36 was also the first with a theme hitting its second repeat — the Lords of Hell theme ran in Seasons 25, 30, and 36. The trend continues with Season 37’s Forbidden Archives and Season 38’s Ethereal Memory. It appears more and more likely that the pool of repeatable themes only has six options: Lords of Hell (Soul Shard gems), Forbidden Archives (Kanai’s Cube-o-Rama), Ethereal Memory (Ethereal weapons), Shades of the Nephalem (shadow clones/fourth cube slot), Light’s Calling (Angelic Crucibles), and the Eternal Conflict (Pandemonium buffs). That’s relatively small for a recurring cycle and results in a continually shrinking (but easy to guess) pool.

Now, we’ve noted before that a fair number of themes are integrated into the base game: Season 23’s Follower system revamp, Season 26’s Echoing Nightmares, Season 28’s Altar of Rites, and Season 29’s Visions of Enmity. But where are Season 21’s Trial of the Tempests, 18’s Season of the Triune, 17’s Season of Nightmares, 16’s Season of Grandeur, 15’s Boon of the Horadrim, or 14’s Season of Greed? They may not be “strong” themes as far as encouraging player engagement, but Blizzard has shown in the past that they can combine these — for example, activating extra goblins or double Horadric caches during other seasons. I’d love to see a larger option pool for a beloved title.

Regardless, you can continue to enjoy Diablo 3 Season 37’s Kanai’s Cube-o-Rama until March 22. Season 38 takes us back to wielding ethereal weapons starting March 27. See you in Sanctuary!

Originally posted January 30, 2026. Updated March 19, 2026.