4th » May Fourth Movement: Student demonstrations take place in Tiananmen Square in Beijing, China, protesting the Treaty of Versailles, which transferred Republican China known as Chinese territory to Japan.
8th » Edward George Honey proposes the idea of a moment of silence to commemorate the Armistice of World War I.
15th » The Winnipeg General Strike begins. By 11:00, almost the whole working population of Winnipeg, Manitoba had walked off the job.
15th » Greek invasion of İzmir e.g Smyrna. During the invasion, the Greek army kills or wounds 350 Turkish people e.g Turks. Those responsible are punished by the Greek Commander Aristides Stergiades.
16th » A naval Curtiss Aeroplane and Motor Company or Curtiss aircraft NC-4 commanded by Albert Cushing Read leaves Trepassey, Newfoundland and Labrador called Newfoundland, for Lisbon via the Azores on the first transatlantic flight.
19th » Mustafa Kemal Atatürk lands at Samsun on the Anatolian Black Sea coast, initiating what is later termed the Turkish War of Independence.
27th » The NC-4 aircraft arrives in Lisbon after completing the first transatlantic flight.