1. Emancipation Proclamation celebrations: January 1, 1863 marked the day when President Abraham Lincoln's Emancipation Proclamation went into effect, declaring all slaves in Confederate states to be free. This historic event is celebrated each year on January 1 in Washington D.C. with grand festivities.

2. Mayor's New Year's Day Reception: A tradition that dates back to 1801, the Mayor's New Year's Day Reception is held on January 1 each year at the historic John A. Wilson Building in downtown D.C. The event is open to the public and features music, refreshments, and a chance to meet and greet with the city's leaders.

3. National Museum of African American History and Culture opening: On January 1, 2017, the National Museum of African American History and Culture in Washington D.C. opened its doors to the public, becoming the newest Smithsonian museum in the nation's capital.

4. Cherry Blossom Festival announcement: Every year on January 1, the National Park Service announces the predicted peak bloom dates for the cherry blossom trees in D.C. This iconic event draws thousands of visitors to the city each year.

5. New Year's Day parade: The annual New Year's Day parade in D.C. is a beloved tradition that features floats, bands, and performers from across the country. The parade route follows Pennsylvania Avenue from the Capitol building to the White House.