Moment JS
Moment
by Ankit Patidar
HTML
<script src="https://momentjs.com/downloads/moment.min.js"></script>
JavaScript
var t = moment().unix();
t + "000";
/* console.log(moment().format("x")); */
var format = "MMM DD, YYYY h:mm A";
/* console.warn(moment(1548308400000).utc().format(format)); */
/* console.warn(moment(1548288600000).utc().format(format)); */
/* console.warn(moment(moment()._d).add('days', 1).hours(0).minutes(0).seconds(0).format("x")); */
/* console.error(moment().add('days', 1).set('hour', 23).set('minute', 59).set('second', 59).set('millisecond', 000).format("x")); */
var d = "2019-01-23" ;
var t = "03:30:00";
var ts = parseInt(moment(d +" "+ t).format("x"));
var tsu = parseInt(moment(d +" "+ t).utc().format("x"));
var ut = moment(tsu).utc().format(format);
/* console.warn(moment(d +" "+ t).utc()); */
console.log(ts);
console.error(moment(ts).format(format));
console.error(moment(ut).format(format));