1. In 1850, the Washington Monument Society was founded on April 25. This organization was responsible for the construction of the Washington Monument, which was completed in 1884.

2. On April 25, 1862, during the Civil War, the Union Army under General Irvin McDowell occupied Alexandria, Virginia, which was then part of the District of Columbia.

3. In 1910, the Cherry Blossom Festival was first held in Washington, DC on April 25th. This annual festival celebrates the gift of more than 3,000 cherry trees from Tokyo to Washington, DC in 1912.

4. In 1954, the first DC United Nations Conference on International Organization opened on April 25th. The conference resulted in the creation of the United Nations and the signing of the UN Charter on June 26, 1945.

5. In 1990, the International Monetary Fund (IMF) and World Bank held their annual spring meeting in Washington, DC on April 25th. This attracted thousands of protesters who marched against what they saw as the negative impact of the IMF and World Bank policies on developing countries.