Datepicker如何排除一周内的天数？

Question

如何禁止选择休假（sа，su）？

$( "#datepicker" ).datepicker({
	firstDay: 1,
 	minDate: 5,
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<input type="text" id="datepicker">