$(function() { $.datepicker.setDefaults($.datepicker.regional['ja']); $('#datepicker').datepicker({ dateFormat: 'yy-mm-dd', onSelect: function(selectedDate) { var holidays = [ '2016-05-13', '2016-05-25', '2016-08-15' ]; for(var i=0; i< holidays.length; i++){ if(holidays[i] == selectedDate){ $(this).val(''); $(this).after('選択出来ない日です'); } } } }); });