Convertendo e formatando datas

const date = new Date("2020-05-12T23:50:21.817Z");
date.toString()               // Tue May 12 2020 18:50:21 GMT-0500 (Central Daylight Time)
date.toDateString()           // Tue May 12 2020
date.toTimeString()           // 18:50:21 GMT-0500 (Central Daylight Time)
date.toISOString()            // 2020-05-12T23:50:21.817Z
date.toUTCString()            // Tue, 12 May 2020 23:50:21 GMT
date.toGMTString()            // Tue, 12 May 2020 23:50:21 GMT
date.toJSON()                 // 2020-05-12T23:50:21.817Z
date.toLocaleString()         // 5/12/2020, 6:50:21 PM
date.toLocaleDateString()     // 5/12/2020
date.toLocaleTimeString()     // 6:50:21 PM

const date = new Date();
const [month, day, year] = [date.getMonth(), date.getDate(), date.getFullYear()];
const [hour, minutes, seconds] = [date.getHours(), date.getMinutes(), date.getSeconds()];