Mountain Day took place on Sunday, 4 December 2011 during the 17th session of the Conference of the Parties (COP 17) to the UN Framework Convention on Climate Change (UNFCCC), in Durban, South Africa. Mountain Day was organized by the International Centre for Integrated Mountain Development (ICIMOD), the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH, and the Mountain Partnership Consortium