<Tr> <Th> Frequency </Th> <Td> Annual </Td> </Tr> <Tr> <Th> Related to </Th> <Td> Labour Day </Td> </Tr> <P> Labor Day in the United States is a public holiday celebrated on the first Monday in September . It honors the American labor movement and the contributions that workers have made to the strength, prosperity, laws and well - being of the country . It is the Monday of the long weekend known as Labor Day Weekend and it is considered the unofficial end of summer in the United States . It is recognized as a federal holiday . </P> <P> Beginning in the late 19th century, as the trade union and labor movements grew, 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 parade in New York City . In 1887, Oregon was the first state of the United States to make it an official public holiday . By the time it became an official federal holiday in 1894, thirty U.S. states officially celebrated Labor Day . </P>

What are we celebrating when we celebrate labor day
find me the text answering this question