1. The city of Washington, D.C. was established on April 4, 1791. President George Washington selected the site for the new national capital, which was then known as the "Federal City."

2. On April 4, 1850, the Washington Monument Society was founded. The society was created to raise funds for the construction of a memorial to George Washington. The monument was finally completed in 1884.

3. The first baseball game ever played in Washington, D.C. took place on April 4, 1891. The game was between the Washington Nationals and the Philadelphia Phillies, and the Nationals won by a score of 12 to 4.

4. On April 4, 1968, civil rights leader Martin Luther King Jr. was assassinated while standing on the balcony of the Lorraine Motel in Memphis, Tennessee. The news of King's death sparked riots and protests across the country, including in Washington, D.C.

5. In 2015, on April 4, the Washington Nationals played their first game of the season against the New York Mets. The Nationals won the game 3 to 1, with pitcher Max Scherzer throwing a no-hitter and striking out 17 batters.