JSFiddle - React, Tailwind, and code Playground

HTML

<p id="txtDate">Local date ?</p>
<button onclick="dateFormatTest()">
  Click me
</button>

JavaScript

function getFormattedLocalDate(utcDateString) {
	var date = new Date(utcDateString);
	var months = [
	  "Jan", "Feb", "Mar", "Apr", "May", "Jun", 
	  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	];
	var formattedDate = date.getFullYear() + '-' + months[date.getMonth()] + '-' + date.getDate() + ' ' + date.getHours() + ':' + date.getMinutes() + ':' + date.getSeconds();
	return formattedDate;
}

function dateFormatTest() {
  var formattedDate = getFormattedLocalDate('2015-12-31 14:08:23 UTC');
  document.getElementById("txtDate").innerHTML = 'Local date = ' + formattedDate;
}