4 days/32hrs, working at current job for over 2 years now. It's not a common arrangement over here, sadly. I just decided that that is how i want to do things and simply asked for it, when looking for jobs, until i got a good offer that accepted this. I did take 20% off from my salary, were i working 40hrs, but still ended up with more than i was making at my previous job. I like it, the weekday/weekend balance seems just right.