Hello I am willing to donate some money if we can add one feature to your software plugin. we have similar software that require calendar bookings for recording software.  We can MASK out dates at the start of the calendar year.  Simply put,  the mask will omit the dates out of the calendar so they can not be used though the year.  its similar to the work day schedule that you have now.  We can say we are open from Monday to Friday from 9am to 5pm and closed Sat and Sun.  If you can add the same thing with holidays,  It would be a major update to your service.   Thank you