1. In 1864, District of Columbia residents voted in a presidential election on February 29 for the first time. This was due to the fact that the District was granted the right to vote in presidential elections the previous year by the passage of the 23rd Amendment.

2. On February 29, 1892, the John Philip Sousa Bridge in Washington D.C. officially opened to the public. The bridge was named after famous American composer John Philip Sousa, who was born in Washington D.C.

3. In 1916, February 29 marked the second day of the great blizzard that buried Washington D.C. under nearly two feet of snow. This storm was considered one of the worst in the city's history and caused significant damage to buildings and infrastructure.

4. On February 29, 1940, the Washington D.C. municipal government published a list of over 11,000 delinquent taxpayers in the city's newspapers. The list included names, addresses, and amounts owed for individuals who had not paid their taxes.

5. In 1964, February 29 was celebrated as "Leap Year Day" in Washington D.C. with a variety of events and activities, including a "Leap Year Dance" at the Washington Hilton hotel and a special exhibit at the Smithsonian National Museum of American History.