JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<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>test</title>
</head>
<body>
    <p id="demo"></p>
    <h2>123456789</h2>
</body>
</html>

JavaScript

/* Counter */
var countDownDate = new Date("Dec 5, 2022 15:37:25").getTime();

var x = setInterval(function() {

  var now = new Date().getTime();
    
  var distance = countDownDate - now;
    
  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);
    
  document.getElementById("demo").innerHTML = days + "d " + hours + "h "
  + minutes + "m " + seconds + "s ";
    
  if (distance < 0) {
    clearInterval(x);
    document.getElementById("demo").innerHTML = "EXPIRED";
  }
}, 1000);



/*English Number to Persian */
function walkNode(node) {
  if (node.nodeType == 3) {
    node.data = node.data.replace(/\d/g, convert)
  }

  for (var i = 0; i < node.childNodes.length; i++) {
    walkNode(node.childNodes[i])
  }
}

walkNode(document.getElementsByTagName('body')[0])

function convert(a) {
  return ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'][a]
}