Labor Day is a federal holiday in the United States celebrated each year on the first Monday of September. The purpose of the holiday is to honor and recognize the American labor movement, which began in the 1800s. In 1894, President Grover Cleveland, who was a conservative Democrat, signed the law that made Labor Day a national holiday. He wanted to distinguish it from "May Day," another holiday celebrated around the world to honor laborers. However, whether labeled "conservative" or "social...