CODE EXAMPLE FOR JAVASCRIPT

date-fns format

//Parse date string to date object. Use parse
const dateString = '10-13-20';
const date = parse(dateString, 'MM-dd-yy', new Date()) // not MM-DD-YY
//Format date object to result string. Use format
const result = format(date, "yyyy-MM-dd'T'HH:mm:ss.SSSxxx")
console.log(result)
//Result will be like (the same with moment's result in my timezone):
// 2020-10-13T00:00:00.000+09:00