1. May 27, 1937: The Golden Gate Bridge opened to the public in San Francisco, California. Although this event did not take place in the District of Columbia, it remains a significant moment in American history.

2. May 27, 1941: President Franklin D. Roosevelt signed the bill creating the Office of Civilian Defense in Washington, D.C. This organization was created to prepare the United States for possible war.

3. May 27, 1965: The first special election in the District of Columbia was held to fill a vacancy in the United States House of Representatives. Democrat John McMillan was elected to fill the seat.

4. May 27, 1972: President Nixon signed the Anti-Ballistic Missile Treaty with the Soviet Union in Moscow, Russia. The treaty limited the number of missile defense systems that could be deployed by each country.

5. May 27, 1988: President Ronald Reagan visited the District of Columbia to sign the Housing and Community Development Act into law. The act provided funding for low-income housing and community development projects across the country.