Make the new Date test independent of the timezone in which it is run.

test/mjsunit/date.js

Index: test/mjsunit/date.js
===================================================================
--- test/mjsunit/date.js	(revision 4232)
+++ test/mjsunit/date.js	(working copy)
@@ -48,7 +48,7 @@
 assertEquals(8.64e15, dMax.getTime());
 assertEquals(275760, dMax.getFullYear());
 assertEquals(8, dMax.getMonth());
-assertEquals(13, dMax.getDate());
+assertEquals(13, dMax.getUTCDate());
 
 var dOverflow = new Date(8.64e15+1);
 assertTrue(isNaN(dOverflow.getTime()));
@@ -57,7 +57,7 @@
 assertEquals(-8.64e15, dMin.getTime());
 assertEquals(-271821, dMin.getFullYear());
 assertEquals(3, dMin.getMonth());
-assertEquals(20, dMin.getDate());
+assertEquals(20, dMin.getUTCDate());
 
 var dUnderflow = new Date(-8.64e15-1);
 assertTrue(isNaN(dUnderflow.getTime()));