Telstra outage: The night a network decided the year was 2006

On July 8, 2026, a GPS receiver in Melbourne malfunctioned after scheduled maintenance and began reporting the year as 2006, causing Telstra's mobile network to believe it was twenty years in the past and triggering a widespread outage affecting voice calls, text messages, emergency services, trains, payment terminals, and EV chargers. The failure occurred because modern mobile networks, particularly those using TDD (Time Division Duplex) 5G technology, depend critically on precise synchronized time across all cells to avoid signal collisions. The incident highlights a significant vulnerability in critical infrastructure systems that rely on accurate timekeeping but often neglect to adequately protect or monitor their time distribution architecture.