Option to view a Sunday-Saturday week in the date picker, but still have your working days be Monday-Friday. So the grayed out weekends are bookends of the week, not stacked at the end.
We use google calendar as I assume many others do, and the week there is shown this way. It causes pause and sometimes incorrect dating when switching between google and monday because the calendar is formatted differently. Looking to achieve consistency here and the calendar view should be customizable, not just what your work days are.