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Hi,
You can use Jquery datepicker. Just insert the script before the in your template index.php or default.php file.
Input unavailable dates you want to disable for selection in your calendar, and set minDate to add or subtract numbers of days from today.
You can use firebug to check the input ID for what to put in (#date-from")
jQuery(function($){
var unavailableDates = ["18-7-2017","19-7-2017","20-7-2017","21-12-2015","22-12-2015","23-12-2015","24-12-2015"];
$( "#date-from" ).datepicker({
minDate: 5,
beforeShowDay: function(date) {
dmy = date.getDate() + "-" + (date.getMonth() + 1) + "-" + date.getFullYear();
if ($.inArray(dmy, unavailableDates) == -1) {
return [true, ""];
} else {
return [false, "", "Unavailable"];
}
}
});
});