I would love to be able to choose when the first day of the week is when displaying the calendar. Currently it’s set to show Monday in the first column of the monthly display. In my locale, Sunday is traditionally shown in that column. This has caused confusion on the part of patients and caused missed appointments, confusion with patients as to if they are actually available (and thus had folks cancel appointments) as well as showing up a day early for an appointment.
This loss of revenue and frustration for our users can easily be fixed by changing how the calendars are displayed (either automatically by business location, or by an option selected in the settings).