Don't let the fake accent distract you. She lied.
"The five-day, 40-hour workweek became part of American labor law partly due to Henry Ford. In 1926, the founder of the Ford Motor Company took his six-day-a-week operation down to five days per week, with no changes in employee compensation. He believed doing so would make his workers more productive—and more inclined to spend money during their downtime. With days off, people would have more time for leisure activities and shopping, spending their earnings, perhaps, on vehicles. This landmark change made Ford one of the first companies in the nation to set the standard of a five-day workweek."
https://firmspace.com/theproworker/from-strikes-to-labor-laws-how-the-us-adopted-the-5-day-workweek