A single day off, yes, two, not so common. From your link:

In 1929, the Amalgamated Clothing Workers of America was the first union to demand and receive a five-day workweek. The rest of the United States slowly followed, but it was not until 1940, when a provision of the 1938 Fair Labor Standards Act mandating a maximum 40-hour workweek went into effect, that the two-day weekend was adopted nationwide.