Rosa Parks Day is observed in the United States, commemorating the civil rights activist Rosa Parks. Celebrated primarily in California since 2000, it was officially recognized in Missouri in 2015, while Ohio and Oregon observe it on December 1, the anniversary of Parks’s arrest. The day honors Parks’s significant role in the civil rights movement, particularly her refusal to give up her bus seat to a white passenger on December 1, 1955, which sparked the Montgomery Bus Boycott. This boycott lasted for 1 year and 15 days, ultimately leading to the Supreme Court’s decision declaring bus segregation unconstitutional. Parks, a seamstress and secretary for the Montgomery chapter of the NAACP, was involved in investigating cases of racial injustice, including the gang rape of Recy Taylor in 1945. Rosa Parks Day serves as a reminder of her contributions to the fight against racial segregation and is marked by various observances and events across the country.