1. The Washington Monument was completed on February 21, 1885, but the final piece was laid on February 21, 1884. This means construction on the iconic monument started on February 14, 1885.

2. On February 14, 1797, President John Adams signed the legislation to move the United States capital from Philadelphia to Washington, D.C.

3. On February 14, 1900, the United States Senate Building was officially opened after three years of construction.

4. February 14, 2009, marked a significant moment in D.C. history when President Barack Obama signed the D.C. Voting Rights Act into law, granting D.C. residents a voting representative in Congress.

5. The Smithsonian's National Museum of African American History and Culture opened its doors to the public on September 24, 2016, but the groundbreaking ceremony took place on February 22, 2012. This ceremony included remarks from then-President Barack Obama and was attended by many dignitaries and local officials.