9/10 (Thu) Update Change Notice
Greetings, Rune Hunters. With the update on 9/10 (Thu),a new season begins and changes occur in various contents in Undecember. Among them, prior notice is provided for contentsthat will be reset or terminated, so…

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When does the current Undecember season end?
When does the current Undecember season end?
Total Seasons
7
Avg. Duration
112 days
Steam online
645
7d peak
45.9K
Current season
Season period: September 10, 2026 after maintenance to January 7, 2027 before maintenance.
Started
Sep 10, 2026
Ends
Jan 7, 2027
Running for
Next season in
Season ended
Updated 09:00 AM
Greetings, Rune Hunters. With the update on 9/10 (Thu),a new season begins and changes occur in various contents in Undecember. Among them, prior notice is provided for contentsthat will be reset or terminated, so…
Greetings, Rune Hunters.An issue where some accounts in the Russia region are unable to access the game and use services. ■ Check Result Notice- There are no restrictions or blocks on access to specific regions in…
Greetings, Rune Hunters.I'm Dusup Shin, the newly appointed PD of UNDECEMBER.Together with the development team, I will continue to further develop UNDECEMBER's unique brand of fun,and I will listen sincerely to the…
The current Undecember season ends on January 7, 2027.
The next Undecember season is estimated to start around January 11, 2027. This is based on historical average season lengths and is not yet officially confirmed.
Yes — the date shown for the Undecember season is officially confirmed by the developer.
Undecember seasons typically last around 123 days, based on the average of recent completed seasons.
The Farside
Season period: September 10, 2026 after maintenance to January 7, 2027 before maintenance.
Season 11: The Forge
Undecember Season 11: The Forge launches following the conclusion of Season 10, bringing a leaderboard reset and new seasonal content with a fresh economy and ladder race.
New Age
The current Undecember season focuses on a large-scale skill overhaul, Season Mode progression through Abyss Gate New Age, and season-specific rewards and passes.
Abyss Gate
Abyss Gate centered on descending through Chaos Statue-linked dungeon depths with progressively stronger monsters and season-exclusive progression.
Starwalker
Season Starwalker added a new Season Mode cycle with its own gear, pass rewards, raid schedule, and season-limited progression systems.
Trials of Power
This season followed Re:Birth, resetting Void Rift progression and adding a new season-focused competitive cycle built around Trials of Power content.