Wikipedia:Selected anniversaries/March 31
On March 31:
- 1854 - Matthew Perry concluded a treaty opening Japan's ports to the West.
- 1889 - The Eiffel Tower was inaugurated in Paris.
- 1903 - Richard Pearse reportedly flew a heavier-than-air powered aircraft.
- 1930 - The Production Code was instituted for U.S. motion pictures.
- 1991 - Cold War: The Warsaw Pact came to an end.