Pulaski Day is a holiday celebrated in some parts of the United States, particularly in Illinois, to honor the contributions of Casimir Pulaski, a Polish nobleman and military commander. He is known for his role in the American Revolutionary War, where he fought for American independence and is often referred to as the "Father of the American Cavalry." The holiday is observed on the first Monday of March. On Pulaski Day, various events and activities take place, including parades and educational programs that highlight Pulaski's legacy and the Polish-American community's history. Schools and government offices may close in observance, allowing people to participate in local celebrations and reflect on the importance of cultural heritage.