DCON 2019 (Community Ethereum Development Conference) is a non-profit global conference which will happen in Sydney, Australia on 8-14 April 2019. The purpose of the conference is to improve communication among various Ethereum communities and to promote Ethereum ecosystem development on a global scale. EDCON is organized as a conference series, once a year in different countries. The previous EDCONs were held successfully in ESCP Europe, Paris 2017, and Ryerson University, Toronto 2018 (both were organized by LinkTime, one of the Chinese Ethereum community representatives). The Ethereum Foundation and various Ethereum communities have been strongly supportive to this high-quality community conference.