We used to have 9-6 working hours, but +- 2 each way, it was funny, almost everyone chose to come in early, and do 7 to 3, except the programmers who all decided to do 10 to 7 or 11 to 8,
Yeah, you will obviously need a day or some hours where there is an overlap. So for a 4 day work week, maybe you have 2 days where you have to work. But that will still be a much better and a flexible solution.