// Set the date we're counting down to var countDownDate = new Date("Mar 20, 2023 16:00:00").getTime(); // Update the count down every 1 second var x = setInterval(function() { // Get today's date and time var now = new Date().getTime(); // Find the distance between now and the count down date var distance = countDownDate - now; // Time calculations for days, hours, minutes and seconds var days = Math.floor(distance / (1000 * 60 * 60 * 24)); var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)); var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60)); var seconds = Math.floor((distance % (1000 * 60)) / 1000); // Display the result in the element with id="demo" document.getElementById("demo").innerHTML = "D-"+days + " : " + hours + "h " + minutes + "m " + seconds + "s"; // If the count down is finished, write some text if (distance < 0) { clearInterval(x); document.getElementById("demo").innerHTML = "OUT NOW!"; } }, 1000);