JSFiddle - React, Tailwind, and code Playground

HTML

Date: <input type="text" name="date" value="" />

JavaScript

$("input[name=date]").datepicker({
    dateFormat: "dd MM",
    onSelect: function(dateText, inst) {
        var dateArr = dateText.split(' ')
        var suffix = "";
        switch(inst.selectedDay) {
            case '1': case '21': case '31': suffix = 'st'; break;
            case '2': case '22': suffix = 'nd'; break;
            case '3': case '23': suffix = 'rd'; break;
            default: suffix = 'th';
        }

        $("input[name=date]").val(dateArr[0] + suffix +' '+ dateArr[1]);
    }

});