I did it a bit different. For 2020, working four days gives me 204 workable days per year. Working five days gives me 255 workable days per year.

What I do is that I work five days a week and around June-July I take ten weeks off. I have the same amount of working days per year with the same income but it feels like a godsend to have a yearly sabbatical of over 2 months during the best weather of the year. It reminds me of being in school again with the long summer holidays.

If I ever have children that means being with them for six weeks fully dedicated to them.