diff --git a/src/date.js b/src/date.js
index 1fb4897921..242ab7bbcb 100644
--- a/src/date.js
+++ b/src/date.js
@@ -81,12 +81,7 @@ function TimeFromYear(year) {
 
 
 function InLeapYear(time) {
-  return DaysInYear(YearFromTime(time)) == 366 ? 1 : 0;
-}
-
-
-function DayWithinYear(time) {
-  return DAY(time) - DayFromYear(YearFromTime(time));
+  return DaysInYear(YearFromTime(time)) - 365;  // Returns 1 or 0.
 }
 
 
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 7724f1b820..7d5de29844 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -1764,11 +1764,11 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   Register object = ToRegister(instr->InputAt(0));
   Register temp = ToRegister(instr->TempAt(0));
 
-  // A Smi is not instance of anything.
+  // A Smi is not an instance of anything.
   __ test(object, Immediate(kSmiTagMask));
   __ j(zero, &false_result, not_taken);
 
-  // This is the inlined call site instanceof cache. The two occourences of the
+  // This is the inlined call site instanceof cache. The two occurences of the
   // hole value will be patched to the last map/result pair generated by the
   // instanceof stub.
   NearLabel cache_miss;
@@ -1780,10 +1780,10 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   __ mov(eax, Factory::the_hole_value());  // Patched to either true or false.
   __ jmp(&done);
 
-  // The inlined call site cache did not match. Check null and string before
-  // calling the deferred code.
+  // The inlined call site cache did not match. Check for null and string
+  // before calling the deferred code.
   __ bind(&cache_miss);
-  // Null is not instance of anything.
+  // Null is not an instance of anything.
   __ cmp(object, Factory::null_value());
   __ j(equal, &false_result);
 
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index f05d7f807d..8b2e31e619 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -125,6 +125,9 @@ compiler/simple-osr: SKIP
 # BUG (1094)
 regress/regress-deopt-gc: SKIP
 
+# BUG (1153)
+date-parse: SKIP
+
 ##############################################################################
 [ $arch == mips ]