Victory in Europe Day is the day celebrating the formal acceptance by the Allies of World War II of Germany's unconditional surrender of its armed forces on Tuesday, 8 May 1945; it marked the official surrender of all German military operations.
Most former Soviet countries, and some others, celebrate on 9th May, as Germany's unconditional surrender entered into force at 23:01 on 8 May Central European Summer Time; this corresponded with 00:01 on 9 May in Moscow Time.
Several countries observe public holidays on the day each year, also called Victory Over Fascism Day, Liberation Day, or Victory Day. In the UK, it is often abbreviated to VE Day, a term which existed as early as September 1944, in anticipation of victory.