JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.1/moment.min.js"></script>
<div id="out">
</div>

JavaScript

function checkTheDay(){
	setTimeout(function(){
  	document.getElementById("out").innerHTML = moment().day(); 
    checkTheDay();
  }, 2000);
}

checkTheDay();