The 2019 meeting of the High-level Political Forum on Sustainable Development (HLPF) opened on Tuesday, 9 July 2019, at UN Headquarters in New York. In the morning, the opening session focused on progress in the achievement of the Sustainable Development Goals (SDGs) four years after implementation started. This was followed by a session on progress, gaps, and obstacles in leaving no one behind. In the afternoon, a review of SDG implementation and interrelations among goals took place, focussing on a discussion on SDG 4 (quality education).