moment().toDate();
moment(date).fromNow();
moment( moment().utc().format( "YYYY-MM-DD HH:mm:ss" )).toDate()
moment.tz('2018-07-17 19:00:00', 'YYYY-MM-DD HH:mm:ss', 'UTC').format() // "2018-07-17T19:00:00Z"
moment('2018-07-17 19:00:00', 'YYYY-MM-DD HH:mm:ss').tz('UTC').format() // "2018-07-18T00:00:00Z"
let now = moment()
let now = now.toDate()
moment.toDate()