In September 2000, leaders of 189 countries gathered at the United Nations headquarters and signed the historic Millennium Declaration, in which they committed to achieving a set of measurable goals that provide a framework for development planning for countries around the world by the target date of 2015. The Sustainable Development Goals (SDGs), officially known as Transforming our world: the 2030 Agenda for Sustainable Development, are an intergovernmental set of aspiration goals. On 19 July 2014, the Open Working Group of the UN General Assembly proposed for the SDGs to the Assembly.