The assembly of the Ecumenical Patriarchate hierarchy will take place at the beginning of September in Constantinople

The assembly of the hierarchs of the Ecumenical Patriarchate will take place from September 1-3 in Constantinople. They will examine issues concerning the Church of Constantinople and, more broadly, Orthodoxy. Traditionally, hierarchs of the Patriarchate around the world meet every three. years. The previous assembly was held in August of 2015. Source