The United States Supreme Court rules in United States v. Álvarez-Machaín that it is permissible for the United States to forcibly extradite suspects in foreign countries and bring them to the United States for trial, without approval from those other countries.

In the Philippines, Mount Pinatubo erupts in the second largest volcanic eruption of the 20th century, killing over 800 people.

In the Saskatchewan general election, the CCF, led by Tommy Douglas, is elected and forms the first socialist government in North America.

Following the 1920 Schleswig plebiscites, Northern Schleswig is transferred from Germany to Denmark.

John Alcock and Arthur Brown complete the first nonstop transatlantic flight when they reach Clifden, County Galway, Ireland.

The Oregon Treaty extends the border between the United States and British North America, established by the Treaty of 1818, westward to the Pacific Ocean.