Why labour day is celebrated in September instead of on 1st may in the us,? (please read details)?

A day off is a day off. It is nice to be aware of history, but our holidays are not spaced evenly enough as it is. It is a wonder the government and big business gives us any days off. I think they still work at Walmart and other stores on Labor Day. Some (all) employers think a day to celebrate work should be celebrated working!