 The fourth WYC was held in Quebec City in August 2008 under the name Regeneration 2008.The Congress celebrated the role of youth in achieving the Millennium Development Goals, youth empowerment, and the 'co-management' model of equal partnership between youth and elders.The fifth WYC was held in Istanbul in August 2010 with the theme of "Imece" (a centuries-old solidarity system used in rural Turkey, consisting of mutual aid and working together for the good of the community), and with three sub themes