你想要这样吗?
https://jsfiddle.net/9vqs2e1L/8/
var onlyThisDates = ["09/20/2018", "09/26/2018", "09/29/2018", "09/27/2018", "09/20/2018", "09/21/2018", "09/22/2018", "10/01/2018", "10/03/2018", "10/05/2018", "10/11/2018", "10/15/2018", "10/17/2018"];
$('#doctortime').datepicker({
format: "mm/dd/yyyy",
autoclose: true,
beforeShowDay: function (date) {
var dt_ddmmyyyy = ('0' + (date.getMonth() + 1)).slice(-2) + '/' + ('0' + date.getDate()).slice(-2) + '/' + date.getFullYear();
return (onlyThisDates.indexOf(dt_ddmmyyyy) != -1);
}
});