1. In 1862, Congress established the District of Columbia Compensated Emancipation Act, which granted freedom and compensation to slaves in the District of Columbia. This act was signed into law by President Abraham Lincoln on April 16, 1862, but April 10 is remembered as the day Congress passed the act.

2. On April 10, 1947, Jackie Robinson broke the color barrier in Major League Baseball when he made his debut with the Brooklyn Dodgers, playing against the Boston Braves at Ebbets Field in Brooklyn. This historic moment paved the way for other black athletes to participate in professional sports.

3. In 1968, the Poor People's Campaign was launched in Washington, D.C. by Martin Luther King Jr. and other civil rights leaders. The campaign was a call for economic justice and an end to poverty and discrimination. The campaign culminated in a march on Washington on June 19, 1968.

4. On April 10, 1971, the Washington Senators played their last opening day game at RFK Stadium. The team moved to Texas the following year and became the Texas Rangers.

5. In 2019, Washington, D.C. became the first city in the United States to implement a fully reusable and compostable takeout container program. The initiative, called "Zero Waste DC," aims to reduce waste and promote sustainability in the city. The program was launched on April 10, 2019.