What is Labor Day? 'Labor Day, the first Monday in September, is a creation of the labor movement and is dedicated to the social and economic achievements of American workers. It constitutes a yearly national tribute to the contributions workers have made to the strength, prosperity, and well-being of our country' . After years of scattered celebration in various parts of the country, it began receiving official recognition by some states by about 1885, and in 1894, Congress declared the fi...