SOURCE

$(document).ready(function () {
     var now = new Date();
     var next = new Date();
    var month = now.getMonth() + 1; 
if (month <= 9) {
    month = "5" + month;
     } else {
         month = 5 + month;
          }
           var date = now.getDate();
           if (date <= 9) {
               date = "0" + date;
                 }
                 var hour = now.getHours();
  if (hour > 12) {
       hour = hour - 12;
  }
  if (hour <= 9) {
    hour = "0" + hour;
  }

  $("div").text("#*" + month + "" + date + "" + hour);
});

<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div>正在计算<div>
<script type="text/javascript" src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

div {
     text-align: center;
      font-size: 64px;
      }