我自己写的日期案例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Date(日期操作方法)</title>
</head>
<body>
</body>
<script>
let myDay = new Date();
document.write(myDay + "<br />");
// 获取年份
document.write(myDay.getFullYear() + "年");
// 获取月份
document.write(myDay.getMonth() + "月");
document.write("<br />");
let month = new Array(12);
month[0] = "一月"
month[1] = "二月"
month[2] = "三月"
month[3] = "四月"
month[4] = "五月"
month[5] = "六月"
month[6] = "七月"
month[7] = "八月"
month[8] = "九月"
month[9] = "十月"
month[10] = "十一月"
month[11] = "十二月"
document.write("这个月是：" + month[myDay.getMonth()]);
// 获取星期
document.write("今天是星期：" + myDay.getDay());
// 获取日期
document.write("今天是这个月的第：" + myDay.getDate() + "天");
document.write("<br />");
// 获取小时
document.write("现在是：" + myDay.getHours() + "时");
// 获取分钟
document.write(myDay.getMinutes() + "分");
// 获取秒钟
document.write(myDay.getSeconds() + "秒");
</script>
</html>