Make dates default to the local timezone if none specified

test/mjsunit/date-parse.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 227 matching lines @@
     ['2000-01-01T08:00:00Z', 946713600000],
     ['2000-01-01T08:00Z', 946713600000],
     ['2000-01T08:00:00.000Z', 946713600000],
     ['2000T08:00:00.000Z', 946713600000],
     ['2000T08:00Z', 946713600000],
     ['2000-01T00:00:00.000-08:00', 946713600000],
     ['2000-01T08:00:00.001Z', 946713600001],
     ['2000-01T08:00:00.099Z', 946713600099],
     ['2000-01T08:00:00.999Z', 946713600999],
     ['2000-01T00:00:00.001-08:00', 946713600001],
-    ['2000-01-01T24:00', 946771200000],
-    ['2000-01-01T24:00:00', 946771200000],
-    ['2000-01-01T24:00:00.000', 946771200000],
+    ['2000-01-01T24:00Z', 946771200000],
+    ['2000-01-01T24:00:00Z', 946771200000],
+    ['2000-01-01T24:00:00.000Z', 946771200000],
     ['2000-01-01T24:00:00.000Z', 946771200000]];
 
 var testCasesES5MiscNegative = [
     '2000-01-01TZ',
     '2000-01-01T60Z',
     '2000-01-01T60:60Z',
     '2000-01-0108:00Z',
     '2000-01-01T08Z',
     '2000-01-01T24:01',
     '2000-01-01T24:00:01',
@@ skipping 35 matching lines @@
     'May 25 2008 1:30 (PM)) UTC',  // Bad unmatched ')' after number.
     'May 25 2008 1:30( )AM (PM)',  //
     'a1',                          // Issue 126448, 53209.
     'nasfdjklsfjoaifg1',
     'x_2',
     'May 25 2008 AAA (GMT)'];      // Unknown word after number.
 
 testCasesNegative.forEach(function (s) {
     assertTrue(isNaN(Date.parse(s)), s + " is not NaN.");
 });