March 8: McCollum v. Board of Education: The United States Supreme Court rules that religious instruction in public schools violates the U.S. Constitution.

March 16: The largest flood in the history of Brampton, Ontario, occurs.

March 17: Treaty of Brussels signed by Belgium, France, Luxembourg, the Netherlands and the United Kingdom, providing for economic, social and cultural collaboration and collective self-defence. - The Hells Angels motorcycle gang is founded in California.

March 18: The Round Table Conference in The Hague, Netherlands for the preparation of the decolonization process for Aruba and the other Dutch Colonies. Aruba presents the mandate of the Aruban People for Aruba to become an Independent Country, under the souvereignty of the House of Orange, based on Aruba's first state constitution presented officially since August 1947, and a (4th) Member State of the future Dutch Commonwealth.

March 20: Singapore holds its first elections. - Renowned Italian conductor Arturo Toscanini makes his television debut, conducting the NBC Symphony Orchestra in an all-Wagner program. - The 20th Academy Awards ceremony is held. Gentleman's Agreement wins the Academy Award for Best Picture. (source: Wikipedia)