Labor Day in the USA is celebrated on the first Monday of September to honor workers. The document describes the many types of workers that contribute to society such as those who build infrastructure, manufacture goods, grow and transport food, provide healthcare and education, and perform other important jobs. It notes that while machines now do some work, workers are still needed to operate and program them. On Labor Day, schools and some businesses close so people can have picnics and spend time with family and friends to mark the end of summer.