index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Time</title>
    <style>
        html, body{
            margin: 0;
            padding: 0;
            background-color: black;
            overflow: hidden;
            font-family: 'Inter';
            color: white;
        }
        .center{
            padding: 1em;
            line-height: 0;
            margin: 10px;
            border: 5px solid white;
            border-radius: 20px;
        }
        #Time{
            color: white;
            font-family: 'Inter';
            font-size: 15vw;
        }
        #utctime{
            color: white;
            font-family: 'Inter';
            font-size: 15vw;
        }
        main{
            display: flex;
            height: 100vh;
            align-items: center;
            justify-content: center;
        }
        .title{
            padding: 1em;
            border-radius: 10px;
            background-color: #444444;
            width: fit-content;
        }
    </style>
</head>
<body>
    
    <main>
        <div class="center">
            <h1 id="Time">IST</h1>
        </div>
        <div class="center">
            <h1 id="utctime">UTC</h1>
        </div>
    </main>

    <script>
        setInterval(() => {
            const a = new Date()
            let hours = a.getHours()
            let mins = a.getMinutes()
            
            if(hours.toString().length<2){
                hours = '0'+hours
            }
            if(mins.toString().length<2){
                mins = '0'+mins
            }
            const html = `${hours}:${mins}`
            document.getElementById('Time').innerText = html
            }, 1000);



        setInterval(() => {
            const b = new Date()
            let utchours = b.getUTCHours()
            let utcmins = b.getUTCMinutes()

            if(utchours.toString().length<2){
                utchours = '0'+utchours
            }
            if(utcmins.toString().length<2){
                utcmins = '0'+utcmins
            }
            const html = `${utchours}:${utcmins}`
            document.getElementById('utctime').innerText = html
            }, 2000);
    </script>
</body>
</html>