checkDates.js

const moment = require('moment')

const dateStringWOTimeZone = '2016-05-29'
const newDate = new Date(dateStringWOTimeZone).toISOString()
const momentDate = moment(dateStringWOTimeZone).toISOString()
const momentUTCDate = moment.utc(dateStringWOTimeZone).toISOString()
const momentFromDate = moment(new Date(dateStringWOTimeZone)).toISOString()

console.log(`
${newDate} = new Date('${dateStringWOTimeZone}').toISOString()
${momentDate} = moment('${dateStringWOTimeZone}').toISOString()
${momentUTCDate} = moment.utc('${dateStringWOTimeZone}').toISOString()
${momentFromDate} = moment(new Date('${dateStringWOTimeZone}')).toISOString()

Run this file on the server:

const moment = require('moment')

console.log((new Date('${newDate}')).toISOString() + " = new Date('${newDate}')")
console.log(moment('${momentDate}').toISOString() + " = moment('${momentDate}')")
console.log(moment.utc('${momentUTCDate}').toISOString() + " = moment.utc('${momentUTCDate}')")
console.log(moment(new Date('${momentFromDate}')).toISOString() + " = moment(new Date('${momentFromDate}'))")
`)

client-output.js

2016-05-29T00:00:00.000Z = new Date('2016-05-29').toISOString()
2016-05-28T22:00:00.000Z = moment('2016-05-29').toISOString()
2016-05-29T00:00:00.000Z = moment.utc('2016-05-29').toISOString()
2016-05-29T00:00:00.000Z = moment(new Date('2016-05-29')).toISOString()

server-output.js

2016-05-29T00:00:00.000Z = new Date('2016-05-29T00:00:00.000Z')
2016-05-28T22:00:00.000Z = moment('2016-05-28T22:00:00.000Z')
2016-05-29T00:00:00.000Z = moment.utc('2016-05-29T00:00:00.000Z')
2016-05-29T00:00:00.000Z = moment(new Date('2016-05-29T00:00:00.000Z'))

moment() hat sich disqualifiziert

• Sat May 28 2016 22:00:00 GMT+0000 (UTC) = moment('Sun May 29 2016 00:00:00 GMT+0200 (CEST)')

moment.utc() is auch raus.

update:

toString() should also always be replaced with toISOString()