So siehts ganz gut aus !

node_modules/es5-ext/date/#/format.js

@@ -0,0 +1,38 @@
+/* eslint id-length: "off" */
+
+"use strict";
+
+var pad  = require("../../number/#/pad")
+  , date = require("../valid-date")
+  , format;
+
+format = require("../../string/format-method")({
+	Y: function () {
+		return String(this.getFullYear());
+	},
+	y: function () {
+		return String(this.getFullYear()).slice(-2);
+	},
+	m: function () {
+		return pad.call(this.getMonth() + 1, 2);
+	},
+	d: function () {
+		return pad.call(this.getDate(), 2);
+	},
+	H: function () {
+		return pad.call(this.getHours(), 2);
+	},
+	M: function () {
+		return pad.call(this.getMinutes(), 2);
+	},
+	S: function () {
+		return pad.call(this.getSeconds(), 2);
+	},
+	L: function () {
+		return pad.call(this.getMilliseconds(), 3);
+	}
+});
+
+module.exports = function (pattern) {
+	return format.call(date(this), pattern);
+};