Untitled

<!DOCTYPE html>
<html lang="en-US">
<head>
     <meta charset="UTF-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Should I Wake Up Today?</title>
     <script>
          "use strict";
          /* Defining Table
           * Input: Computer's clock
           * Processing: Determine if the day of the week, month, and year is a day on which the user should wake up
           * Output: Get up or sleep in
           */
          let date = new Date();
          //console.log("Date obj: " + date);
          date = date.toString();
          //console.log("Date str: " + date);
          let dateTrunc;
          dateTrunc = date.substring(0, date.indexOf(":") - 8) + ".";
          console.log(dateTrunc);
          let message;
          let isNYD = dateTrunc.includes("Jan") && dateTrunc.includes("01");
          console.log(isNYD);
          let isFOJ = dateTrunc.includes("Jul") && dateTrunc.includes("04");
          console.log(isFOJ);
          let isChr = dateTrunc.includes("Dec") && dateTrunc.includes("25");
          console.log(isChr);
          let isHoliday = isNYD || isFOJ || isChr;
          console.log(isHoliday);
          if (!(date.includes("Sat") || date.includes("Sun")) && isHoliday == false) {
               message = "Get up!";
          } else {
               message = "Sleep in.";
          }
          function tell() {
               document.getElementById("outputDiv").innerHTML = message;
          }

      </script>
</head>
<body>
     <button type=button onclick=tell()>Should I wake up today?</button>
     <div id=outputDiv></div>
</body>
</html>