    <!DOCTYPE html>
    <html>
    <head>
      <meta charset="UTF-8">
      <title>시스템 날짜 출력하기</title>
      <link rel="stylesheet" href="style_js.css">
    <body>
      <script>
        let today = new Date();
        const day = "일월화수목금토";
        document.write(today + "<hr>");
        document.write(today.toLocaleString() + "<hr>");
        document.write(today.getFullYear() + "년<hr>");
        document.write(today.getMonth() + 1 + "월<hr>");
        document.write(today.getDate() + "일<hr>");
        document.write(day[today.getDay()] + "요일<hr>");
        document.write(today.getHours() + "시<hr>");
        document.write(today.getMinutes() + "분<hr>");
        document.write(today.getSeconds() + "초");
      </script>
    </body>
    </html>