So siehts ganz gut aus !

node_modules/core-js/modules/_date-to-primitive.js

@@ -0,0 +1,9 @@
+'use strict';
+var anObject = require('./_an-object');
+var toPrimitive = require('./_to-primitive');
+var NUMBER = 'number';
+
+module.exports = function (hint) {
+  if (hint !== 'string' && hint !== NUMBER && hint !== 'default') throw TypeError('Incorrect hint');
+  return toPrimitive(anObject(this), hint != NUMBER);
+};