World Festival of Youth and Students

The World Festival of Youth and Students is an international event organized by the World Federation of Democratic Youth (WFDY) and the International Union of Students after 1947. == History == The festival has been held occasionally since 1947, mainly in communist states, as an event of global youth solidarity for "democracy" and against "war and imperialism." The largest festival was the 6th, held in 1957 in Moscow, when 34,000 young people from 131 countries attended the event.

Source: Wikipedia — World Festival of Youth and Students (CC BY-SA 4.0)