I would like to know what you prefer and how either 5 day school weeks or 4 day school weeks improve academic growth?
I studied 6 days. What "improves academic growth" is attention span, and per my observations in others & myself, it's rarely bestowed at best - be it the early hours, late hours or long hours of the day. And now you kids have infinitely more distractions in your palms. I don't envy your teachers.
The problem is not the number of days, it is the curriculum. If the schools don't teach anything then they are just babysitting services.
When I was in fifth grade I learned fractions by holding a ruler in my hand and planning where to put the nails in a box I wanted to build. That occupied part of a single afternoon, and I have always been so good with fractions that people think I must have gone to wizard school. The public school spent a year and a half trying to teach us fractions by showing us bits of colored paper.
Schools now are so worthless that the burger stands have to have pictures on the cash registers instead of numbers.