As International Youth Day 2026 is observed on August 12, here are seven important things to know about the global observance. When Is International Youth Day Observed? The United Nations General Assembly established International Youth Day in 1999, following a recommendation by the World Conference of Ministers Responsible for Youth. What Is The Theme Of International Youth Day 2026? International Youth Day is marked through youth conferences, workshops, awareness campaigns, cultural programmes, educational activities and community events.