JSFiddle - React, Tailwind, and code Playground

CSS

body { font-family: monospace; white-space: pre; }

JavaScript

var Response = { 'LCID': 123 };


Date = (function(orig) {
    var date = function(a, b, c, d, e, f, g) {
        var object = (this instanceof Object ? (arguments.length < 1 ? new orig() : (arguments.length < 2 ? new orig(a) : (arguments.length < 4 ? new orig(a, b || 0, c || 1) : new orig(a, b, c, d || 0, e || 0, f || 0, g || 0)))) : orig());
        object.LCID = Response.LCID;
        return object;
    };
    date.prototype = orig.prototype;
    return date;
})(Date);


var x = new Date();
document.writeln(x);
document.writeln(x.LCID);
document.writeln(x.getFullYear());
document.writeln(typeof x);
document.writeln(Object.prototype.toString.call(x));
document.writeln(x instanceof Date);
document.writeln("<br/>");

Response.LCID = 456;

var y = new Date();
document.writeln(y);
document.writeln(y.LCID);
document.writeln(y.getFullYear());
document.writeln(typeof y);
document.writeln(Object.prototype.toString.call(y));
document.writeln(y instanceof Date);
document.writeln("<br/>");

document.writeln(Date());
document.writeln(new Date());
document.writeln(new Date(2012));
document.writeln(new Date(2012, 7));
document.writeln(new Date(2012, 7, 14));
document.writeln(new Date(2012, 7, 14, 9));
document.writeln(new Date(2012, 7, 14, 9, 45));
document.writeln(new Date(2012, 7, 14, 9, 45, 27));
document.writeln(new Date(2012, 7, 14, 9, 45, 27, 687));