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. The holiday is also a federal holiday.
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.
Canada's Labour Day is also celebrated on the first Monday of September. More than 80 countries celebrate International Workers' Day on May 1 – the ancient European holiday of May Day – and several countries have chosen their own dates for Labour Day.
Beginning in the late 19th century, as the trade union and labor movements grew, different groups of trade unionists chose a variety of days on which to celebrate labor. In the United States a September holiday called Labor Day was first proposed in the 1880s. An early history of the holiday dates the event's origins to a General Assembly of the Knights of Labor convened in New York City in September 1882. In conjunction with this clandestine Knights assembly a public parade of various labor organizations was held on September 5 under the auspices of the Central Labor Union (CLU) of New York. Secretary of the CLU Matthew Maguire is credited for first proposing that a national Labor Day holiday subsequently be held on the first Monday of each September in the aftermath of this successful public demonstration.
An alternative thesis is maintained that Peter J. McGuire of the American Federation of Labor put forward the first proposal in May 1882, after witnessing the annual labour festival held in Toronto, Canada.
There was disagreement among labor unions at this time about when a holiday celebrating workers should be. Many advocated for May 1st. However, President Cleveland was concerned that a labor holiday on May 1st would be a commemoration of the Haymarket Affair of May 1886, as it eventually was under the name International Workers' Day. In 1887, he publicly supported the September Labor Day holiday.[better source needed]
In 1887 Oregon became the first state of the United States to make Labor Day an official public holiday. By the time it became an official federal holiday in 1894, thirty U.S. states officially celebrated Labor Day.
Following the deaths of workers at the hands of United States Army and United States Marshals Service during the Pullman Strike of 1894 in Chicago, the United States Congress unanimously voted to approve legislation to make Labor Day a national holiday and President Grover Cleveland signed it into law six days after the end of the strike. Cleveland supported the creation of the national holiday in an attempt to shore up support among trade unions following the Pullman Strike. The date of May 1 (an ancient European holiday known as May Day) was an alternative date, celebrated then (and now) as International Workers' Day, but President Cleveland was concerned that observance of Labor Day on May 1 would encourage Haymarket-style protests and would strengthen socialist and anarchist movements that, though distinct from one another, had rallied to commemorate the Haymarket Affair on International Workers' Day.
All U.S. states, the District of Columbia, and the United States territories have made Labor Day a statutory holiday.
The form for the celebration of Labor Day was outlined in the first proposal for the holiday: A street parade to exhibit to the public "the strength and esprit de corps of the trade and labor organizations", followed by a festival for the workers and their friends and families. This became the pattern for Labor Day celebrations. Speeches by prominent men and women were introduced later, as more emphasis was placed upon the civil significance of the holiday. Still later, by a resolution of the American Federation of Labor convention of 1909, the Sunday preceding Labor Day was adopted as Labor Sunday and dedicated to the spiritual and educational aspects of the Labor movement.
Unofficial end of summer
Labor Day is called the "unofficial end of summer" because it marks the end of the cultural summer season. Many take their two-week vacations during the two weeks ending Labor Day weekend. Many fall activities, such as school and sports begin about this time.
In the United States, many school districts resume classes around the Labor Day holiday weekend (see First day of school). Most begin the week before, making Labor Day weekend the first three-day weekend of the school calendar, while others return the Tuesday following Labor Day, allowing families one final getaway before the school year begins. Many districts across the Midwest are opting to begin school after Labor Day.
In the U.S. state of Virginia, the amusement park industry has successfully lobbied for legislation requiring most school districts in the state to have their first day of school after Labor Day, in order to give families another weekend to visit amusement parks in the state. The relevant statute has been nicknamed the "Kings Dominion law" after one such park.
In Minnesota the State Fair ends on Labor Day. Under state law public schools normally do not begin under after the holiday. Allowing time for school children to show 4-H projects at the Fair has been given as one reason for this timing. 
In U.S. sports, Labor Day weekend marks the beginning of many fall sports. National Collegiate Athletic Association (NCAA) teams usually play their first games that weekend and the National Football League (NFL) traditionally play their kickoff game the Thursday following Labor Day. The Southern 500 NASCAR auto race has been held on Labor Day weekend at Darlington Raceway in Darlington, South Carolina from 1950 to 2003 and since 2015. At Indianapolis Raceway Park, the National Hot Rod Association hold their finals of the NHRA U.S. Nationals drag race that weekend. Labor Day is the middle point between weeks one and two of the U.S. Open Tennis Championships held in Flushing Meadows, New York.
In fashion, Labor Day is (or was) considered the last day when it is acceptable to wear white or seersucker.
The "unofficial beginning of summer" in the U.S. is Memorial Day at the end of May.
Labor Day sales
To take advantage of large numbers of potential customers with time to shop, Labor Day has become an important weekend for discounts and allowances by many retailers in the United States, especially for back-to-school sales. Some retailers claim it is one of the largest sale dates of the year, second only to the Christmas season's Black Friday.