Labor Day in the United States is a federal holiday that marks the American labor movement and the contributions that workers have made to the strength, prosperity, laws and well-being of the country. It is considered the unofficial end of summer. As trade union and labor movements grew in the late 19^th century, trade unionists proposed that a day be set aside to celebrate labor. Labor Day was promoted by the Central Labor Union and the Knights of Labor, which organized the first Labor Day parade in New York City. In 1887, Oregon was the first state to make it an official public holiday. Thirty additional states joined the band wagon. In 1894, it became federal holiday in 1894.