National Polka Day is celebrated worldwide every August 9, honoring the polka, a lively dance style and music genre that originated in Bohemia, now part of the Czech Republic. The polka features an upbeat rhythm, typically in 2/4 time, and is characterized by a brisk tempo with strong emphasis on the first beat, often accompanied by instruments such as the accordion and brass instruments. The term "polka" is believed to derive from the Czech word "půlka," meaning "half," relating to the dance's half-jump movements. The polka gained popularity in the United States during the late 19th century, particularly among Polish, Czech, German, and Slovenian American communities, with a strong presence in the Midwest and Northeast, including states like Wisconsin, Ohio, and Pennsylvania. Celebrations often include attending polka concerts and festivals, such as Pulaski Polka Days and the National Polka Festival in Texas, as well as learning basic polka dance steps. The International Polka Association, based in Chicago, also plays a significant role in promoting the tradition through its Hall of Fame and annual awards.