The four-day workweek is far from widespread in the United States. Yet, its proponents argue that moving away from the five-day workweek is not just good for employee satisfaction and wellbeing; it can address some of the modern workplace’s most pervasive issues, like employee engagement, without leading to a drop in productivity. And as AI gets better and better at boosting efficiency, implementing a shorter workweek may become even more of a realistic option. Just this week, OpenAI published a policy paper suggesting companies pilot a four-day workweek as an “efficiency dividend” to give time back to workers.