JSFiddle - React, Tailwind, and code Playground

HTML

<div class="datepicker"  data-fechas='["10/10/2014","12/10/2014","13/10/2014"]'></div>

JavaScript

jQuery(function(){
        jQuery('.datepicker').each(function (i) {
                    var $item = jQuery(this);
                    var fechas = $item.data('fechas');				
                    var options = {
                        'dateFormat' : 'dd/mm/yy',
                        'display' : $item.data('display') == '' ? '' : $item.data('display'),
                        beforeShowDay: function(date) {
                            if ( fechas.length ) {
                                var datestr = [ date.getDate(), date.getMonth()+1, date.getFullYear()];
                                datestr = datestr.join('/');
                                console.log(datestr);
                                if ($.inArray(datestr, fechas) != -1) {                                    
                                    return [true, 'css-class-to-highlight', 'tooltipText'];
                                } else {
                                    return [false, 'css-normal-class', 'no-highlight'];
                                }
                            }
                        }
                    }
                    $item.datepicker( options );
                });
    });