JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>

CSS

p {
    border-bottom: 1px solid #ddd;
    font-family: monospace;
    padding: 5px;
    margin: 0;
    line-height: 20px;
    min-height: 20px;
    white-space: pre;
}

JavaScript

function log () {
    $('body').append('<p>' + [].join.call(arguments, ' '));
}

function test(m) {
    log('');
    log(m.format());
    log(' is valid :', m.isValid());
    log('     zone :', m.zone());
    log(' in array :', m._a);
    log('out array :', m.toArray());
}

log('moment version', moment.version);

test(moment.utc(0));
/* test(moment('01/01/1970', 'DD/MM/YYYY')); */
/* test(moment('01/01/1970 00:00:01', 'DD/MM/YYYY HH:mm:ss'));
test(moment('01/01/1970 00:59:59', 'DD/MM/YYYY HH:mm:ss'));
test(moment('01/01/1970 01:00:00', 'DD/MM/YYYY HH:mm:ss'));
test(moment('01/01/1970 01:00:01', 'DD/MM/YYYY HH:mm:ss'));
test(moment('31/12/1969 23:59:59', 'DD/MM/YYYY HH:mm:ss')); */