Can’t say for the US, but in NL, Europe, 9-6 with an hour mandatory break is the default for programming work. We hear the adults complain about 9-5 as students, we go to work, turns out its 8-5 or 9-6. Fuck.

Uneducated works tends to be 8.5 hours per day, instead of 9; only because half an hour breaks are the norm, there.