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.
It’s still not “a given.” Plenty of people work on the weekends.
Who “died for that?” A little context would be nice. As far as I know, there’s been a popular day of rest for a very, very long time. https://en.wikipedia.org/wiki/Workweek_and_weekend
A single day off, yes, two, not so common. From your link:
The jobs ive had worked 7 days out of every 14 with one week at 5 days and week two at 2 days, all 12 hours long and every other weekend off