JSFiddle - React, Tailwind, and code Playground

JavaScript

var myCSharpString = "Tue Jul 30 2013 00:00:00 GMT+0000 (GMT Daylight Time)";

var date = new Date(Date.parse(myCSharpString));

alert(date.getFullYear() + "/" + (date.getMonth() + 1) + "/" + (date.getDate() + 1));