代码示例:(标识:eg_js_date_setfullyear)
<!DOCTYPE html>
<html>
<body>

<h2>JavaScript setFullYear()</h2>

<p>setFullYear() 方法设置日期对象的年份:</p>

<p id="demo"></p>

<script>
var d = new Date();
d.setFullYear(2020);
document.getElementById("demo").innerHTML = d;
</script>

</body>
</html>
运行结果: