<div class="form-outline datepicker-with-filter">

  <input type="text" class="form-control" id="exampleDatepicker8" />

  <label for="exampleDatepicker8" class="form-label">Select a date</label>

</div>

​

const datepickerWithFilter = document.querySelector('.datepicker-with-filter');

​

const filterFunction = (date) => {

  const holiday = new Date('10-10-2022')

  const isHoliday = holiday.getTime() === date.getTime()

  return !isHoliday

}

​

new mdb.Datepicker(datepickerWithFilter, { filter: filterFunction });