index.html

<meta http-equiv="X-UA-Compatible" content="IE=edge">
<style>
  .wrong {
    color: red;
  }
</style>
<a href="http://github.com/yaffle/date-shim"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://a248.e.akamai.net/assets.github.com/img/e6bef7a091f5f3138b8cd40bc3e114258dd68ddf/687474703a2f2f73332e616d617a6f6e6177732e636f6d2f6769746875622f726962626f6e732f666f726b6d655f72696768745f7265645f6161303030302e706e67" alt="Fork me on GitHub"></a>    
<ul>
<li><a href="http://github.com/yaffle/date-shim">date-shim</a>, <a href="https://github.com/kriskowal/es5-shim">es5-shim</a>, <a href="https://github.com/bestiejs/json3">json3</a></li>
<li><a href="http://www.hackcraft.net/web/datetime/">good page about UTC date format</a></li>
<li><a href="http://msdn.microsoft.com/en-us/library/ff960802(v=vs.85).aspx">IE JS Date implementation</a></li>
<li><a href="https://bugs.ecmascript.org/show_bug.cgi?id=231">https://bugs.ecmascript.org/show_bug.cgi?id=231</a></li>
</ul>
<h1>Native</h1>
<div id="native"></div>
<h1>Fixed</h1>
<div id="fixed"></div>
<script>

if (!Date.now) {
  Date.now = function () {
    return -1;
  };
}
if (!Date.prototype.getYear) {
  Date.prototype.getYear = function () {
    return -1;
  };
}
if (!Date.prototype.setYear) {
  Date.prototype.setYear = function () {
    return -1;
  };
}
if (!Date.prototype.toISOString) {
  Date.prototype.toISOString = function () {
    return '';
  };
}
if (!Date.prototype.toJSON) {
  Date.prototype.toJSON = function () {
    return '';
  };
}
if (!this.JSON) {
  this.JSON = {
    stringify: function (s) {
      return (s && s.toJSON ? s.toJSON() : String(s));
    }
  };
}

var container = document.getElementById('native');

var path = [];

function describe(title, f) {
  path.push(title);
  if (beforeEachFunction !== null) {
    beforeEachFunction();
  }
  f();
  path.pop();
}

function it(title, f) {
  describe(title, f);
}

var beforeEachFunction = null;

var counter = 0;

function expect(a) {
  counter += 1;
  function toBe(b) {
    var s = counter + ') ' + path.join(' - ') + ', result: "' + a + '", exptected: "' + b + '"';
    var x = document.createElement('div');
    container.appendChild(x);
    if (b !== a) {
      //s += '<pre>' + (new Error()).stack + '</pre>';
      x.className = 'wrong';
    }
    x.innerHTML = s;
  }
  return {
    toBe: toBe,
    toBeFalsy: function () {
      a = !a;
      return toBe(true);
    },
    toBeDefined: function (x) {
      a = a !== undefined;
      return toBe(true);
    },
    toEqual: function (x) {
      return toBe(x);
    },
    toMatch: function (re) {
      a = re.test(a);
      return toBe(true);
    },
    toBeTruthy: function () {
      a = Boolean(a);
      return toBe(true);
    }
  };
}

function beforeEach(c) {
  beforeEachFunction = c;
}

</script>
<script src="s-date.js"></script>
<script src="date-shim.js"></script>
<script>
  counter = 0;
  container = document.getElementById('fixed');
</script>
<script src="s-date.js"></script>
<script>
</script>