German reunification (German: Deutsche Wiedervereinigung) was the process in which the German Democratic Republic (GDR / East Germany) joined the Federal Republic of Germany (FRG / West Germany), and Berlin was united into a single city-state. The start of this process is commonly referred to by former citizens of the GDR as die Wende (The Turning Point.). The end of the unification process is officially referred to as the German unity (German: Deutsche Einheit), celebrated on 3 October (German Unity Day).