diff --git a/Source/Core/JulianDate.js b/Source/Core/JulianDate.js
index 4f0759580026..390ff91b975f 100644
--- a/Source/Core/JulianDate.js
+++ b/Source/Core/JulianDate.js
@@ -122,7 +122,7 @@ define([
 
         var a = ((month - 14) / 12) | 0;
         var b = year + 4800 + a;
-        var dayNumber = (((1461 * b) / 4) | 0) + (((367 * (month - 2 - 12 * a)) / 12) | 0) - (((3 * ((b + 100) / 100)) / 4) | 0) + day - 32075;
+        var dayNumber = (((1461 * b) / 4) | 0) + (((367 * (month - 2 - 12 * a)) / 12) | 0) - (((3 * (((b + 100) / 100) | 0)) / 4) | 0) + day - 32075;
 
         // JulianDates are noon-based
         hour = hour - 12;
diff --git a/Specs/Core/JulianDateSpec.js b/Specs/Core/JulianDateSpec.js
index 4fb6a2ad6cdb..933b3485ec50 100644
--- a/Specs/Core/JulianDateSpec.js
+++ b/Specs/Core/JulianDateSpec.js
@@ -146,6 +146,13 @@ defineSuite([
         expect(julianDate.secondsOfDay).toEqual(34);
     });
 
+    it('Construct a date from a JavaScript Date (5)', function() {
+        var jsDate = new Date('11/17/2039 12:00:00 AM UTC');
+        var julianDate = JulianDate.fromDate(jsDate);
+        expect(julianDate.dayNumber).toEqual(2466109);
+        expect(julianDate.secondsOfDay).toEqual(43236);
+    });
+
     it('Fail to construct from an undefined JavaScript Date', function() {
         expect(function() {
             return JulianDate.fromDate(undefined);