Work ethic: Do you think a 4-day work week will bring efficiency?

I just read that Poland wants to launch a pilot project of a 4-day work week from January 2026 (although a 4-hour work week would sound better). 😅

I want to ask if any of you in your company have tried this concept of a shorter work week, and how it has affected the results of your employees and the company?

In my country (Slovakia), most of the time we have 5 days a week (8 working hours), and home office is a privilege. I personally see it as a very expensive way of functioning at work, especially when unpaid travel is a waste of time and money. So I am pretty lucky to be remote because I can dedicate time to work instead of travelling and am more focused.