diff --git a/lib/Cake/Network/CakeResponse.php b/lib/Cake/Network/CakeResponse.php
index 29ebcd93b..e2545e161 100644
--- a/lib/Cake/Network/CakeResponse.php
+++ b/lib/Cake/Network/CakeResponse.php
@@ -676,10 +676,10 @@ class CakeResponse {
 		}
 		$this->header(array(
 			'Date' => gmdate("D, j M Y G:i:s ", time()) . 'GMT',
-			'Last-Modified' => gmdate("D, j M Y G:i:s ", $since) . 'GMT',
 			'Cache-Control' => 'public, max-age=' . ($time - time()),
 			'Pragma' => 'cache'
 		));
+		$this->modified($since);
 		$this->expires($time);
 	}
 
@@ -692,7 +692,7 @@ class CakeResponse {
  *
  * `$response->expires('now')` Will Expire the response cache now
  * `$response->expires(new DateTime('+1 day'))` Will set the expiration in next 24 hours
- * `$response->expires)` Will return the current expiration header value
+ * `$response->expires()` Will return the current expiration header value
  *
  * @param string|DateTime $time
  * @return string
@@ -708,6 +708,30 @@ class CakeResponse {
 		return null;
 	}
 
+/**
+ * Sets the Last-Modified header for the response by taking an modification time
+ * If called with no parameters it will return the current Last-Modified value
+ *
+ * ## Examples:
+ *
+ * `$response->modified('now')` Will set the Last-Modified to the current time
+ * `$response->modified(new DateTime('+1 day'))` Will set the modification date in the past 24 hours
+ * `$response->modified()` Will return the current Last-Modified header value
+ *
+ * @param string|DateTime $time
+ * @return string
+ */
+	public function modified($time = null) {
+		if ($time !== null) {
+			$date = $this->_getUTCDate($time);
+			$this->_headers['Last-Modified'] = $date->format('D, j M Y H:i:s') . ' GMT';
+		}
+		if (isset($this->_headers['Last-Modified'])) {
+			return $this->_headers['Last-Modified'];
+		}
+		return null;
+	}
+
 /**
  * Returns a DateTime object initialized at the $time param and using UTC
  * as timezone
diff --git a/lib/Cake/Test/Case/Network/CakeResponseTest.php b/lib/Cake/Test/Case/Network/CakeResponseTest.php
index 445598f06..e9522db67 100644
--- a/lib/Cake/Test/Case/Network/CakeResponseTest.php
+++ b/lib/Cake/Test/Case/Network/CakeResponseTest.php
@@ -271,7 +271,7 @@ class CakeResponseTest extends CakeTestCase {
 		$response->expires('+1 day');
 		$expected = array(
 			'Date' => gmdate("D, j M Y G:i:s ", $since) . 'GMT',
-			'Last-Modified' => gmdate("D, j M Y G:i:s ", $since) . 'GMT',
+			'Last-Modified' => gmdate("D, j M Y H:i:s ", $since) . 'GMT',
 			'Expires' => $time->format('D, j M Y H:i:s') . ' GMT',
 			'Cache-Control' => 'public, max-age=' . ($time->format('U') - time()),
 			'Pragma' => 'cache'
@@ -284,7 +284,7 @@ class CakeResponseTest extends CakeTestCase {
 		$time = '+5 day';
 		$expected = array(
 			'Date' => gmdate("D, j M Y G:i:s ", $since) . 'GMT',
-			'Last-Modified' => gmdate("D, j M Y G:i:s ", $since) . 'GMT',
+			'Last-Modified' => gmdate("D, j M Y H:i:s ", $since) . 'GMT',
 			'Expires' => gmdate("D, j M Y H:i:s", strtotime($time)) . " GMT",
 			'Cache-Control' => 'public, max-age=' . (strtotime($time) - time()),
 			'Pragma' => 'cache'
@@ -297,7 +297,7 @@ class CakeResponseTest extends CakeTestCase {
 		$time = time();
 		$expected = array(
 			'Date' => gmdate("D, j M Y G:i:s ", $since) . 'GMT',
-			'Last-Modified' => gmdate("D, j M Y G:i:s ", $since) . 'GMT',
+			'Last-Modified' => gmdate("D, j M Y H:i:s ", $since) . 'GMT',
 			'Expires' => gmdate("D, j M Y H:i:s", $time) . " GMT",
 			'Cache-Control' => 'public, max-age=0',
 			'Pragma' => 'cache'
@@ -603,4 +603,36 @@ class CakeResponseTest extends CakeTestCase {
 			->method('_sendHeader')->with('Expires', $time->format('D, j M Y H:i:s') . ' GMT');
 		$response->send();
 	}
+
+/**
+ * Tests setting the modification date
+ *
+ * @return void
+ */
+	public function testModified() {
+		$response = $this->getMock('CakeResponse', array('_sendHeader', '_sendContent'));
+		$now = new DateTime('now', new DateTimeZone('America/Los_Angeles'));
+		$response->modified($now);
+		$now->setTimeZone(new DateTimeZone('UTC'));
+		$this->assertEquals($now->format('D, j M Y H:i:s') . ' GMT', $response->modified());
+		$response->expects($this->at(1))
+			->method('_sendHeader')->with('Last-Modified', $now->format('D, j M Y H:i:s') . ' GMT');
+		$response->send();
+
+		$response = $this->getMock('CakeResponse', array('_sendHeader', '_sendContent'));
+		$now = time();
+		$response->modified($now);
+		$this->assertEquals(gmdate('D, j M Y H:i:s', $now) . ' GMT', $response->modified());
+		$response->expects($this->at(1))
+			->method('_sendHeader')->with('Last-Modified', gmdate('D, j M Y H:i:s', $now) . ' GMT');
+		$response->send();
+
+		$response = $this->getMock('CakeResponse', array('_sendHeader', '_sendContent'));
+		$time = new DateTime('+1 day', new DateTimeZone('UTC'));
+		$response->modified('+1 day');
+		$this->assertEquals($time->format('D, j M Y H:i:s') . ' GMT', $response->modified());
+		$response->expects($this->at(1))
+			->method('_sendHeader')->with('Last-Modified', $time->format('D, j M Y H:i:s') . ' GMT');
+		$response->send();
+	}
 }