Wikipedia:Selected anniversaries/March 31
March 31: César Chávez Day in various U.S. states, Freedom Day in Malta.
- 1854 - Commodore Matthew Perry of the U.S. Navy signed the Treaty of Kanagawa, forcing the opening of Japanese ports to American trade.
- 1889 - The Eiffel Tower (pictured) was inaugurated in Paris.
- 1903 - New Zealand inventor Richard Pearse reportedly flew in one of the first flying machines.
- 1917 - The Danish West Indies became the U.S. Virgin Islands after the United States paid Denmark US$25 million for the Caribbean islands.
- 1930 - Hollywood movie studios instituted the Production Code to avoid government censorship.
Recent days: March 30 – March 29 – March 28
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