1. The District of Columbia was established on February 9, 1791. It was created as a result of the Residence Act of 1790, which authorized the construction of a new capital for the United States on the east bank of the Potomac River.

2. On February 9, 1861, the Peace Convention convened in Washington D.C. in an attempt to prevent the Civil War. The convention was attended by more than 130 delegates from 21 states, but ultimately failed to reach a compromise.

3. In 1913, the 16th Amendment to the U.S. Constitution was ratified on February 9th, allowing for Congress to levy an income tax without regard to population size or distribution.

4. On February 9, 1948, the United States Supreme Court handed down its landmark ruling in the case of Perez v. Sharp, which struck down California's ban on interracial marriage. The Court's decision paved the way for the eventual nationwide legalization of interracial marriage.

5. On February 9, 1961, the Beatles performed their first live show at the Cavern Club in Liverpool, England. Although this did not directly involve the District of Columbia, the Beatles went on to become one of the most iconic bands in history and had a significant impact on popular culture around the world.