Countdown NYE is two days again. Insomniac's New Year's Eve festival returns to NOS Event Center in San Bernardino from Thursday 31 December 2026 into Friday 1 January 2027 — the first time since 2023 that it has run across two days. The headline bill. The top tier is Alesso, DJ Diesel, DJ Snake, Gordo, Marshmello, Subtronics and Tchami, plus a collaborative set from S.Y.N — the trio project uniting SVDDEN DEATH, YVM3 and NIMDA. Yes, DJ Diesel is Shaquille O'Neal, and yes, his bass sets have become a genuine draw at Insomniac events rather than a novelty. More than 75 artists. Underneath the headliners, the bill covers house, techno, bass, trap, hardstyle and UK garage: Oliver Heldens, R3HAB, Seven Lions, Flosstradamus and Loud Luxury on the bigger stages, bass from NGHTMRE, Space Laces, Smoakland, Jessica Audiffred and TroyBoi, and house and techno from Archie Hamilton, James Hype, Joshwa and Walker & Royce. The takeovers. A Bassrush Experience stage and an Insomniac Records takeover anchor the programming, and the Discovery Project — Insomniac's open call for emerging producers — will hand one unsigned artist a slot on the festival. The build. Insomniac has set this edition under an alien theme with five covered stages — a practical detail that matters on a December night in the Inland Empire. Carnival rides, the Galaxy Mall and the Redlight District return, and official afterparties run on-site each night from 2 AM to 6 AM. Tickets. Two-day GA, GA+ and VIP passes are on sale through countdownnye.com, with a $5-deposit payment plan available across all tiers. NOS is having a season. Countdown is the second time Insomniac fills NOS Event Center in barely two months — Escape Psycho Circus takes the same grounds on October 30-31. If you are choosing one, Escape is the costume party; Countdown is the bigger bill and the midnight.