Moment JS playground.

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>
<p id="output"></p>

JavaScript

const exampleDate = '1st February 2019'

console.log(moment(exampleDate, 'Do MMMM YYYY').format('DD-MM-YYYY'));