Intensive, hands-on masterclasses run concurrently and immediately following the main event from August 8–11, 2026. DEF CON 35 (2027) Main Event Dates: August 5–8, 2027. Location: Las Vegas Convention Center (LVCC). Global and Regional DEF CON Events
Their conversation continued over coffee, and eventually, they found themselves on a date. As they strolled through the park, Jack jokingly asked Emily if she could rate their relationship on the DEFCON scale. defcon dates
One evening, as they sat on the couch, watching the sunset, Jack turned to Emily and said, "You know, I think we've reached DEFCON 2. We're on the brink of something serious." Global and Regional DEF CON Events Their conversation
Mark your calendar for the first Thursday-Sunday of August. However, plan your trip for Wednesday through Monday to actually enjoy the event without suffering in line. We're on the brink of something serious
DEF CON 34 Pre-Registration is currently active. Early bird pricing tiers remain open until May 22, 2026.
Following consecutive international installments, the Official DEF CON Forums confirmed the 2026 event will run Training from November 8–10, with the main conference happening November 11–12, 2026. Timeline of Critical Conference Milestones
"DEFCON 5 is the lowest level, indicating normal peacetime operations. DEFCON 4 means we're on a heightened state of alert, with increased intelligence gathering and surveillance. DEFCON 3 indicates a significant increase in military readiness, with units on high alert and preparing for rapid deployment. DEFCON 2 means we're on the brink of war, with military units on high alert and ready to deploy at a moment's notice. And DEFCON 1 is the highest level, indicating imminent war or a nuclear attack."