W3Schools 代码 - Tryit

<!DOCTYPE html>
<html>
<head><meta http-equiv="content-security-policy" content="script-src 'none'">
<title>W3.CSS Шаблон</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../styles/w3.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Raleway">
<style>
body,h1 {font-family: "Raleway", sans-serif}
body, html {height: 100%}
.bgimg {
  background-image: url('../images/forestbridge.jpg');
  min-height: 100%;
  background-position: center;
  background-size: cover;
}
</style>
</head>
<body>

<div class="bgimg w3-display-container w3-animate-opacity w3-text-white">
<div class="w3-display-middle">
  <h1 class="w3-jumbo w3-animate-top">WEEKEND</h1>
  <hr class="w3-border-grey" style="margin:auto;width:40%">
  <p class="w3-large w3-center" id="weekend_countdown">35 днів залишилось</p>
</div>
  <div class="w3-display-bottomleft w3-padding-large">
    Powered by <a href="https://22ae.com/w3css/index.html" target="_blank">w3.css</a>
  </div>
</div>

// Check if it's Saturday
    if (currentDate.getDay() === 6) {
      var countdownElement = document.getElementById("weekend_countdown");
      countdownElement.innerHTML = "The Weekend has landed";
      return; // Exit the function early if it's Saturday
    }

// Find the next Saturday
    var daysToSaturday = (6 - currentDate.getDay() + 7) % 7; // Number of days until the next Saturday
    var nextSaturday = new Date(currentDate.getFullYear(), currentDate.getMonth(), currentDate.getDate() + daysToSaturday);

// Calculate the remaining time
    var timeRemaining = nextSaturday.getTime() - currentDate.getTime();
    var daysRemaining = Math.floor(timeRemaining / (1000 * 60 * 60 * 24));
    var hoursRemaining = Math.floor((timeRemaining % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));

// Display the countdown on the web page
    var countdownElement = document.getElementById("weekend_countdown");
    countdownElement.innerHTML = daysRemaining + " днів та " + hoursRemaining + " годин";
  }

// Call the countdown function when the page loads
  window.onload = function() {
    countdown();
  };
</script>

</body>
</html>