JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/moment.js/2.7.0/moment.js"></script>

JavaScript

var today = 1406019110000; // today
var yesterday = 1405951867000; // yesterday

checkToday(today);
checkToday(yesterday);

function checkToday(timestamp)
{
    if (moment(timestamp).format('DD/MM/YYYY') == moment(new Date()).format('DD/MM/YYYY'))
    	alert('true');
    else
        alert("false");
}