JSFiddle - React, Tailwind, and code Playground

HTML

2012-1-1 0:0:0 
<br />year using getFullYear is: <span id="getFullYear"></span>
<br />year using getUTCFullYear is: <span id="getUTCFullYear"></span>

JavaScript

//remember that in javascript months are zero-based and year and day are not
var date = new Date(Date.UTC(2012, 0, 1, 0,0,0));
document.getElementById('getFullYear').innerHTML=date.getFullYear();
document.getElementById('getUTCFullYear').innerHTML= date.getUTCFullYear();