What are the advantages of a four-day workweek? what appeals could be used to persuade management to adopt a four-day work week?

Scenario:
Some companies and municipalities are switching to a four-day workweek to reduce traffic congestion, air pollution, and stress for employees. Compressing the workweek into four 10 hour days sounds pretty good to you. You would much prefer having Friday free to schedule medical appointments and take care of family business, in addition to leisurely three-day weekends.
As a manager at skin essentials, a mineral-based skincare products and natural cosmetics company, you are convinced that the company’s 200 employees could switch to a four-day workweek with many resulting benefits. For one thing, they would save on gasoline and commute time. You know that many cities and companies have already implemented a four-day workweek with considerable success. You took a quick poll of immediate employees and managers and found that 80% thought that a four-day workweek was a thought that a four-day workweek was a good idea.