const dateFns = require("date-fns")
const date = new Date();
console.log(date, date.getTimezoneOffset());
const jsonFormat = dateFns.format(date, "yyyy-MM-dd'T'HH:mm:ss.SSSxxx");
console.log(jsonFormat);
const parsedDate = dateFns.parseJSON(jsonFormat);
console.log(parsedDate, parsedDate.getTimezoneOffset());
// 2020-03-23T20:22:55.079+00:00