Earlier quoted context omitted.
"encourage"
That's the title says, but we see similar initiatives in EU as well, and it would basically mean that the employee can choose that he wants to work only 4 days. Of course, even now anyone can also have 4 days workweek, if employer agrees to it. But in this case it is something mandatory.
> The government included the promotion of an optional four-day workweek in its annual economic policy guideline finalized Friday
But even if it wasn’t optional, the idea of mandatory labor laws is hardly groundbreaking anyway. The US has many regulations regarding working hours.