What is Semiquincentennial, the official name for the US’ 250th birthday?

America’s 250th birthday has been officially named the “Semiquincentennial,” a term that has sparked confusion and jokes on social media. The word comes from “semi” (half), “quin” (five), and “centennial” (hundred years), meaning half of 500 years, or 250 years. The term follows “Bicentennial,” which was widely used during the country’s 200th anniversary celebrations in 1976.