Season 15 End Date

42:08 Blizzard has not announced when Diablo 4's Season 15, Season of Hell's Legacy, ends, as of Nov 12, 2026, and our estimate from its own calendar is Tuesday, Dec 8, 2026 at 10 a.m. PT (18:00 UTC), with Tuesday, Dec 1 the next most likely day. A season ends at the moment the next one starts, so this is also our estimate for the start of Season 16. The clip shows how late the last date came: Blizzard gave Season 15's start, "Tuesday, September 15th", on stage at BlizzCon on Sep 12, 2026, "in just a few days". The season has run 58 days so far, since Sep 15, 2026 at 9:30 a.m. PT.

Next: what the next season adds, from its test realm, what is still worth finishing in this one or what happens to an unfinished Reliquary.

What Blizzard has said so far

Nothing with a date in it. Read on Nov 12, 2026:

• The newest Diablo 4 post on Blizzard's news feed is still the test realm notice of Oct 22, 2026. It dates only the test, Oct 27 to Nov 3, and speaks of changes "before the next season goes live".
• That notice promised more within a week: "Next week, we'll have more information about which favorite features will continue into the new season." Three weeks later the feed holds no such post.
• Blizzard's season page lists Season of Hell's Legacy as "Live Now" and prints no date at all.
• The live patch is 3.2.4, Build #74043, of Oct 28, 2026. Its notes say nothing about the season's end.

Blizzard has never printed an end date in a season post we read for this page: the posts for Seasons 6, 7, 8, 11, 12 and 14 each give the start and no end.

Estimate 1: from the test realm to the launch

Season 16's test realm opened on Oct 27, 2026. For the seven test realms whose Blizzard posts give the dates, this is how long the season took to follow, and the day the same wait would give this time:

The waits run from 28 to 51 days and their middle value is 42, which is Dec 8. The shortest one, Nov 24, is twelve days away with no announcement, and it falls in the week of Thanksgiving (Nov 26, 2026). The count and the dates in the last column are ours.

Estimate 2: from how long seasons last

The 14 finished seasons lasted from 47 to 112 days, by the start dates on Seasons: 89, 98, 112, 84, 62, 106, 98, 63, 84, 79, 90, 47, 64 and 77 days, in order from Season 1 to Season 14. The middle value is 84 days. Counted from Sep 15, 2026:

Both estimates put their middle on the same day, Dec 8. Ten of the 15 seasons began on a Tuesday in Pacific time; the two that came with an expansion, Seasons 6 and 13, began on a Monday afternoon, and Seasons 1, 11 and 12 on a Thursday, a Thursday and a Wednesday.

How much warning to expect

Blizzard's season post, the long one with the name, the start time and the patch notes, has gone up about a week ahead. The publication dates below are the ones in each post's own page data, read on Nov 12, 2026:

Outside the two expansion launches (Seasons 6 and 13) and BlizzCon (Season 15), the post came 6 to 8 days before the season. So a start on Dec 1 needs a post between Nov 23 and Nov 25, and a start on Dec 8 one between Nov 30 and Dec 2. A day with no post is itself information: once Nov 25 passes without one, Dec 1 would need the short notice Blizzard has given only at an expansion launch or at BlizzCon. A date can also reach players sooner than the post, in a trailer or a stream, as Season 15's did on the BlizzCon stage.

What the end changes for you

A Battle Pass Reliquary lasts exactly as long as its season: "Battle Pass Reliquaries will be available for the full duration of the season they release with", Blizzard wrote when it introduced them (Blizzard, Apr 21, 2025), so the day above is also the last day to claim what you have unlocked in Season 15's. Seasonal characters, their items and their stash then move to the Eternal Realm, and Season Rank starts again from nothing (Seasons has the rules). What survives of the season's own content is not settled: Blizzard said on Oct 22, 2026 that "some features from the Season of Hell's Legacy will be carrying forward into Season 16" and has not yet named them.

What we think

We think Season 15 ends on Tuesday, Dec 8, 2026, the likelier of the two Tuesdays in our standing prediction of Dec 1 or Dec 8 (Predictions). Two counts that share no input, the wait after a test realm and the length of a season, have their middle on that day, and each day of silence takes a little more from Dec 1.

We think Blizzard publishes its Season 16 post, with the season's name and start time, between Nov 23 and Dec 2, 2026, and that it prints no end date for Season of Hell's Legacy before then.

Confidence: Likely. Check by: Dec 2026.

What would prove us wrong: a Blizzard post or page that dates the end of Season 15 before Nov 23, or a Season 16 post published after Dec 2, 2026.

Sources

• Diablo IV news, Blizzard (read Nov 12, 2026)
• Seasons, Blizzard (read Nov 12, 2026)
• The 3.3.0 PTR: What You Need to Know, Blizzard, Oct 22, 2026
• Diablo IV Patch Notes, Blizzard (3.2.4, Oct 28, 2026; read Nov 12, 2026)
• Diablo's Next Era Revealed at BlizzCon 2026 Opening Ceremonies Recap, Blizzard, Sep 12, 2026
• Celebrate 30 Years of Diablo in Season of Hell's Legacy, Blizzard, Sep 12, 2026
• The 3.2.0 PTR: What You Need to Know, Blizzard, Jul 30, 2026
• Hunt the Death Cult in Season of Death Awakening, Blizzard, Jun 23, 2026
• The 3.1 PTR: What You Need to Know, Blizzard, May 28, 2026
• Prepare for the Reckoning: Lord of Hatred Draws Near, Blizzard, Apr 23, 2026
• Become the Butcher in Season of Slaughter, Blizzard, Mar 5, 2026
• The 2.6.0 PTR: What You Need to Know, Blizzard, Jan 29, 2026
• Vanquish the Lesser Evils in Season of Divine Intervention, Blizzard, Dec 3, 2025
• The 2.5.0 PTR: What You Need to Know, Blizzard, Oct 16, 2025
• Rally Against Hell in Season of Infernal Chaos, Blizzard, Sep 16, 2025
• Purge the Sins of the Horadrim, Blizzard, Jun 24, 2025
• Combat Deception in Season 8: Belial's Return, Blizzard, Apr 21, 2025
• Catch Up on the 2.2.0 PTR Campfire Chat, Blizzard, Mar 7, 2025
• Master the Occult in Season of Witchcraft, Blizzard, Jan 14, 2025
• Catch Up on the 2.1 PTR Campfire Chat, Blizzard, Nov 21, 2024
• Conquer Colossal Foes in Season of Hatred Rising, Blizzard, Oct 2, 2024
• The 2.0 PTR: What You Need to Know, Blizzard, Aug 29, 2024
• BlizzCon 2026 | Opening Ceremony, Blizzard Entertainment, Sep 13, 2026 (video)