Allow to select non-workdays (ie. weekend days) in calendar column of boards

My Organization uses M-F work week. Some teams work 7-day M-Su work weeks. We can’t even select a weekend day in a calendar column of any boards, which means our weekend working teams can’t use Monday at all. Make it so calendars can select a weekend day or make it so certain teams or boards can enable 7-day work week, without messing up the entire organisation’s other M-F week team functions.