JS date lib - moment.js

https://github.com/moment/moment

size: 57.4 kb

This is a test with moment.js

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>
<script>
var result = moment().format();
document.querySelector('#insert').innerHTML = result
</script>