Avec new Date()

let today = new Date()
// 2020-12-22T08:26:17.725Z

today.toLocaleString()
// ’22/12/2020 à 09:26:17′

today.toUTCString()
// ‘Tue, 22 Dec 2020 08:26:17 GMT’

Timestamp

let timestamp = Date.now()
// 1608626048418

let timestampToDate = new Date(timestamp)
// 2020-12-22T08:34:08.418Z

let aDate = "Tue, 22 December 2020 09:40:00 +0000";
let aDateToNewDate = new Date(aDate)
// 2020-12-22T09:40:00.000Z

aDateToNewDate.getTime()
// 1608630000000
new Date(1608630000000)
// 2020-12-22T09:40:00.000Z