The DECADE is the fourth concert tour headlined by South Korean band DAY6 in 2025 and 2026. The tour commemorates the group's 10th anniversary since their debut in September 2015 and coincides with the release of their fourth studio album, also titled The DECADE. On May 18, 2026, immediately following the conclusion of their show in Busan, the tour's grand finale was officially announced. Scheduled for July 3–5, 2026, the three-night finale took place at the KSPO Dome.