Summary
March 20th holds a variety of noteworthy events and celebrations, including the International Day of Happiness, World Sparrow Day, and the anniversary of the release of Harriet Beecher Stowe's influential novel "Uncle Tom's Cabin." The date is also significant for milestones in space exploration, political history, and cultural moments, such as the first pedestrian death caused by an autonomous vehicle, and the establishment of the Republican Party in the United States.