Rewrite the function that converts timestamp to year, month and day in C++.

src/runtime.h

 // 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 185 matching lines @@
   F(DisableAccessChecks, 1, 1) \
   F(EnableAccessChecks, 1, 1) \
   \
   /* Dates */ \
   F(DateCurrentTime, 0, 1) \
   F(DateParseString, 2, 1) \
   F(DateLocalTimezone, 1, 1) \
   F(DateLocalTimeOffset, 0, 1) \
   F(DateDaylightSavingsOffset, 1, 1) \
   F(DateMakeDay, 3, 1) \
+  F(DateYMDFromTime, 2, 1) \
   \
   /* Numbers */ \
   F(NumberIsFinite, 1, 1) \
   \
   /* Globals */ \
   F(CompileString, 2, 1) \
   F(GlobalPrint, 1, 1) \
   \
   /* Eval */ \
   F(GlobalReceiver, 1, 1) \
@@ skipping 215 matching lines @@
                                                 int position);
 
   // Helper functions used stubs.
   static void PerformGC(Object* result);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_