Chaos Zero Nightmare events
Last reviewed · Editor: btiger · Public-source guide.
Checked 2026-10-27. Official event overview: 2026-10-21; official update supplemented 2026-10-26; Game8 events: 2026-10-23. Single-source activities and differing calendar displays are labeled below.
Events documented as open on October 27
Anniversary dates agree between the official overview and Game8. The remaining Game8 rows below are secondary-source reports, not independently confirmed deadlines.
| Event | 2026 window / deadline | Evidence |
|---|---|---|
| Nightmare Carnival gifts and check-in | Oct 21 - Dec 2 before maintenance | Official overview + Game8 |
| Nightmare Dream Park | Oct 21 - Dec 23 before maintenance | Official overview + Game8 |
| Blade Poised Against the Cycle | Oct 21 - Dec 2 | Game8 only; Rossweisse Trauma Code event |
| Full-Scale Offensive | Sep 30 - Nov 11 | Game8 only; points and growth rewards |
| Overdrive: Simulation | Official: until Nov 3, 18:00 UTC; Game8: Nov 4 | UTC deadline from official update; database calendar date differs |
| CZN x Epic Seven | Game8 event deadline: Oct 29 | Game8 only; coupon list separately says Oct 27 |
Official anniversary datesOfficial Overdrive UTC scheduleGame8 event table (2026-10-23)Anniversary rewards and selector limitsCoupon deadline conflict
Scheduled after October 27
The official update schedules Seraphion for October 28 at 02:00 UTC and Enforcer Seraphion for November 4 at 02:00 UTC. These are upcoming openings as of this check, not already available content. Both end before December 23 maintenance.
Archived choice guides
Game8 lists SE-4 BR33ZE among past events. Its drink-answer guide is an archive, not evidence that the event is currently open. An archived answer list does not establish a rerun date.
Related schedules
Use event-specific deadlines rather than the entire season’s end date.