Adapt date test to be timezone independant.

test/mjsunit/date.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 172 matching lines @@
 assertTrue(isNaN(d.getTime()));
 d = new Date(1969, 12, 1, -99999999999);
 assertTrue(isNaN(d.getTime()));
 d = new Date(1969, 12, 1, Infinity);
 assertTrue(isNaN(d.getTime()));
 d = new Date(1969, 12, 1, -Infinity);
 assertTrue(isNaN(d.getTime()));
 
 
 // Test creation with obscure date values.
-var timezoneOffset = new Date().getTimezoneOffset();
-d = new Date(1970, 0, 1 + 100000001, -24, -timezoneOffset);
-assertFalse(isNaN(d.getTime()));
-assertEquals(8640000000000000, d.getTime())
-d = new Date(1970, 0, 1 - 100000001, 24, -timezoneOffset);
-assertFalse(isNaN(d.getTime()));
-assertEquals(-8640000000000000, d.getTime())
+assertEquals(8640000000000000, Date.UTC(1970, 0, 1 + 100000001, -24));
+assertEquals(-8640000000000000, Date.UTC(1970, 0, 1 - 100000001, 24));
 
 
 // Parsing ES5 ISO-8601 dates.
 // When TZ is omitted, it defaults to 'Z' meaning UTC.
 
 // Check epoch.
 assertEquals(0, Date.parse("1970-01-01T00:00:00.000+00:00"));
 assertEquals(0, Date.parse("1970-01-01T00:00:00.000-00:00"));
 assertEquals(0, Date.parse("1970-01-01T00:00:00.000Z"));
 assertEquals(0, Date.parse("1970-01-01T00:00:00.000"));
@@ skipping 101 matching lines @@
   var hh = (i < 10) ? "0" + i : "" + i;
   for (var j = 0; j < 60; j += 15) {
     var mm = (j < 10) ? "0" + j : "" + j;
     var ms = (i * 60 + j) * 60000;
     var string = "1972-03-28T23:50:03.500-" + hh + ":" + mm;
     assertEquals(70674603500 + ms, Date.parse(string), string);
     string = "1972-03-28T23:50:03.500+" + hh + ":" + mm;
     assertEquals(70674603500 - ms, Date.parse(string), string);
   }
 }