Don't exchange null and undefined with the global object in function.prototype.{call, apply} for ...

src/date.js

 // Copyright 2006-2008 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 666 matching lines @@
 
 // ECMA 262 - 15.9.5.15
 function DateGetUTCDate() {
   var t = DATE_VALUE(this);
   return NAN_OR_DATE_FROM_TIME(t);
 }
 
 
 // ECMA 262 - 15.9.5.16
 function DateGetDay() {
-  var t = %_ValueOf(this);
+  var t = DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return t;
   return WeekDay(LocalTimeNoCheck(t));
 }
 
 
 // ECMA 262 - 15.9.5.17
 function DateGetUTCDay() {
-  var t = %_ValueOf(this);
+  var t = DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return t;
   return WeekDay(t);
 }
 
 
 // ECMA 262 - 15.9.5.18
 function DateGetHours() {
   var t = DATE_VALUE(this);
   if (NUMBER_IS_NAN(t)) return t;
   return HOUR_FROM_TIME(LocalTimeNoCheck(t));
@@ skipping 388 matching lines @@
     "toGMTString", DateToGMTString,
     "toUTCString", DateToUTCString,
     "getYear", DateGetYear,
     "setYear", DateSetYear,
     "toISOString", DateToISOString,
     "toJSON", DateToJSON
   ));
 }
 
 SetupDate();