​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>单击该按钮可显示给定本地日期时间的月份中的 UTC 日期。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var d = new Date("July 21, 1983 01:15:00");
  var n = d.getUTCDate();
  document.getElementById("demo").innerHTML = n;
}
</script>
​
</body>
</html>
​