Note! Please be careful in configuration of Booking Calendar shortcode with quote symbols. Do not use non standard opening or closing quot symbols. Only standard like: ' The best way to type them from keyboard, and not copy/paste.
This shortcode is useful, if you need to receive several (specific number of bookings) for specific date. It's can be event, where exist restricted number of bookings for this date. You can use this shortcode for booking resource (with specific capacity). Check more about this feature here. Watch it in this video guide.