Differentiate booked dates vs unavailable dates on calendar view

I have a feature request. we are using BookingPress on this site and bookings can be made for durations in blocks of 24 hours.

The booking calendar is clear if you are trying to book 24 hours, but it gets confusing when trying to book a longer duration.

For example. Let's say that 20th April is booked. If I select a 48 hour duration, then when the calendar loads up to select my dates, it will, correctly show me that I can't book 19th or 20th. However. Let's say I wanted to book 18th for 48 hours. Looking at the calendar, I'll see 18th available but 19th unavailable. Again, this is correct, because I can book 48 hours from 18th, but not from the 19th. However, many of our customers appear to be getting confused since they want 48 hours and think they can't book 18th because, even though 18th is available, it looks like 19th isn't.

I fully accept the system is working correctly and is not showing false dates booked, but I can also understand how our customers are getting confused. This is affecting bookings.

Is there any way that you could change the calendar view to differentiate dates which are unavailable because they are booked vs dates which are only unavailable because of the duration you have selected. This would allow me to style things in a much clearer way.