Add class to a dd elements based on the day of the week

today.js

var now = new Date();
    var all_days = [].slice.call(document.querySelectorAll('dd'));
    var days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
    var today = days[ now.getDay() ];
    all_days.forEach(function(node)
    {
      var text = node.dataset.open;
      if(text != undefined)
      {
            if(node.dataset.open.indexOf(today) != -1){
          node.className = 'bold';
       }
      }
  })