diff --git a/src/core/Clock.js b/src/core/Clock.js
index 188a45e3..96304ed2 100644
--- a/src/core/Clock.js
+++ b/src/core/Clock.js
@@ -1,5 +1,5 @@
 getJasmineRequireObj().Clock = function() {
-  function Clock(global, delayedFunctionScheduler) {
+  function Clock(global, delayedFunctionScheduler, date) {
     var self = this,
       realTimingFunctions = {
         setTimeout: global.setTimeout,
@@ -15,15 +15,34 @@ getJasmineRequireObj().Clock = function() {
       },
       installed = false;
 
-    self.install = function() {
+    if (date) {
+      var realDate = {
+        Date: global.Date
+      },
+      fakeDate = {
+        Date: date.Date
+      };
+    }
+
+    self.install = function(mockDate) {
       replace(global, fakeTimingFunctions);
       timer = fakeTimingFunctions;
       installed = true;
+
+      if (date && mockDate) {
+        date.install(mockDate);
+        replace(global, fakeDate);
+      }
     };
 
     self.uninstall = function() {
       delayedFunctionScheduler.reset();
+      if (date) {
+        date.reset();
+        replace(global, realDate);
+      }
       replace(global, realTimingFunctions);
+
       timer = realTimingFunctions;
       installed = false;
     };
@@ -58,6 +77,9 @@ getJasmineRequireObj().Clock = function() {
 
     self.tick = function(millis) {
       if (installed) {
+        if (date) {
+          date.tick(millis);
+        }
         delayedFunctionScheduler.tick(millis);
       } else {
         throw new Error("Mock clock is not installed, use jasmine.getEnv().clock.install()");
diff --git a/src/core/Env.js b/src/core/Env.js
index 5c1fa813..58de0609 100644
--- a/src/core/Env.js
+++ b/src/core/Env.js
@@ -9,7 +9,7 @@ getJasmineRequireObj().Env = function(j$) {
 
     var realSetTimeout = j$.getGlobal().setTimeout;
     var realClearTimeout = j$.getGlobal().clearTimeout;
-    this.clock = new j$.Clock(global, new j$.DelayedFunctionScheduler());
+    this.clock = new j$.Clock(global, new j$.DelayedFunctionScheduler(), new j$.MockDate(global));
 
     var runnableLookupTable = {};
 
diff --git a/src/core/MockDate.js b/src/core/MockDate.js
new file mode 100644
index 00000000..db17e006
--- /dev/null
+++ b/src/core/MockDate.js
@@ -0,0 +1,59 @@
+getJasmineRequireObj().MockDate = function() {
+  function MockDate(global) {
+    var self = this;
+    var currentTime = 0;
+
+    if (!global || !global.Date) {
+      self.install = function() {};
+      self.tick = function() {};
+      self.reset = function() {};
+      return self;
+    }
+
+    self.install = function(mockDate) {
+      if (mockDate instanceof Date) {
+        currentTime = mockDate.getTime();
+      } else {
+        currentTime = global.Date.now();
+      }
+    };
+
+    self.tick = function(millis) {
+      millis = millis || 0;
+      currentTime = currentTime + millis;
+    };
+
+    self.reset = function() {
+      currentTime = 0;
+    };
+
+    self.Date = FakeDate;
+
+    createDateProperties();
+
+    return self;
+
+    function FakeDate() {
+      if (arguments.length === 0) {
+        return new global.Date(currentTime);
+      } else {
+        return global.Date.apply(this, arguments);
+      }
+	  }
+
+    function createDateProperties() {
+      FakeDate.prototype = global.Date.prototype;
+
+      FakeDate.now = function() {
+        return currentTime;
+      }
+
+      FakeDate.toSource = global.Date.toSource;
+      FakeDate.toString = global.Date.toString;
+      FakeDate.parse = global.Date.parse;
+      FakeDate.UTC = global.Date.UTC;
+    }
+	}
+
+  return MockDate;
+};
diff --git a/src/core/requireCore.js b/src/core/requireCore.js
index 15b949ea..b33f7296 100644
--- a/src/core/requireCore.js
+++ b/src/core/requireCore.js
@@ -14,6 +14,7 @@ getJasmineRequireObj().core = function(jRequire) {
   j$.util = jRequire.util();
   j$.Any = jRequire.Any();
   j$.CallTracker = jRequire.CallTracker();
+  j$.MockDate = jRequire.MockDate();
   j$.Clock = jRequire.Clock();
   j$.DelayedFunctionScheduler = jRequire.DelayedFunctionScheduler();
   j$.Env = jRequire.Env(j$);