Labor Day is a federal holiday in the United States celebrated on the first Monday in September to honor and recognize the American labor movement and the works and contributions of laborers to the development and achievements of the United States. The holiday has its origins in the labor union movement, specifically the eight-hour day movement, which advocated eight hours for work, eight hours for recreation, and eight hours for rest.

For most countries, Labor Day is synonymous with, or linked with, International Workers Day, which occurs on May 1st. However, in the United States, Labor Day is celebrated on the first Monday in September. The holiday was first proposed in the early 1880s, and in 1894, it became a national holiday after President Grover Cleveland signed a bill into law declaring Labor Day a national holiday.

Labor Day is a public holiday in many countries, and it is celebrated differently in different countries. In Australia, for example, Labor Day is a public holiday on dates that vary between states and territories. In some states, the date commemorates the Eight Hours Day march, while in others, it is celebrated on the first Monday in October.

Labor Day is also a time for retailers to offer discounts and allowances, especially for back-to-school sales, and some retailers claim it is one of the largest sale dates of the year, second only to the Christmas seasons Black Friday.

In summary, Labor Day is a holiday that celebrates the achievements of workers and the labor movement. It is celebrated on the first Monday in September in the United States and is a public holiday in many countries.