diff --git a/typo3/sysext/fluid/Classes/ViewHelpers/Format/DateViewHelper.php b/typo3/sysext/fluid/Classes/ViewHelpers/Format/DateViewHelper.php
index 711d4206be26c8ec6c9536acab6525f8a7354bf6..f3daa15fe1a39fcc8cd5465a4b3310b653d3df2b 100644
--- a/typo3/sysext/fluid/Classes/ViewHelpers/Format/DateViewHelper.php
+++ b/typo3/sysext/fluid/Classes/ViewHelpers/Format/DateViewHelper.php
@@ -10,6 +10,7 @@ namespace TYPO3\CMS\Fluid\ViewHelpers\Format;
  *                                                                        *
  * The TYPO3 project - inspiring people to share!                         *
  *                                                                        */
+use TYPO3\CMS\Core\Utility\MathUtility;
 
 /**
  * Formats a \DateTime object.
@@ -40,14 +41,6 @@ namespace TYPO3\CMS\Fluid\ViewHelpers\Format;
  * (depending on the current time, see http://www.php.net/manual/en/function.strtotime.php)
  * </output>
  *
- * <code title="output date from unix timestamp">
- * <f:format.date format="d.m.Y - H:i:s">@{someTimestamp}</f:format.date>
- * </code>
- * <output>
- * 13.12.1980 - 21:03:42
- * (depending on the current time. Don't forget the "@" in front of the timestamp see http://www.php.net/manual/en/function.strtotime.php)
- * </output>
- *
  * <code title="Localized dates using strftime date format">
  * <f:format.date format="%d. %B %Y">{dateObject}</f:format.date>
  * </code>
@@ -103,7 +96,7 @@ class DateViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper
 		}
 		if (!$date instanceof \DateTime) {
 			try {
-				if (is_integer($date)) {
+				if (MathUtility::canBeInterpretedAsInteger($date)) {
 					$date = new \DateTime('@' . $date);
 				} else {
 					$date = new \DateTime($date);
diff --git a/typo3/sysext/fluid/Tests/Unit/ViewHelpers/Format/DateViewHelperTest.php b/typo3/sysext/fluid/Tests/Unit/ViewHelpers/Format/DateViewHelperTest.php
index 4e288cfe4fe731e98f7965366ed0075c905ad462..9ddd7a7fa373edc69847d8972596bff572992bd6 100644
--- a/typo3/sysext/fluid/Tests/Unit/ViewHelpers/Format/DateViewHelperTest.php
+++ b/typo3/sysext/fluid/Tests/Unit/ViewHelpers/Format/DateViewHelperTest.php
@@ -10,6 +10,7 @@ namespace TYPO3\CMS\Fluid\Tests\Unit\ViewHelpers\Format;
  *                                                                        *
  * The TYPO3 project - inspiring people to share!                         *
  *                                                                        */
+use TYPO3\CMS\Fluid\ViewHelpers\Format\DateViewHelper;
 
 /**
  * Test case
@@ -51,7 +52,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @test
 	 */
 	public function viewHelperFormatsDateCorrectly() {
-		$viewHelper = new \TYPO3\CMS\Fluid\ViewHelpers\Format\DateViewHelper();
+		$viewHelper = new DateViewHelper();
 		$actualResult = $viewHelper->render(new \DateTime('1980-12-13'));
 		$this->assertEquals('1980-12-13', $actualResult);
 	}
@@ -60,7 +61,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @test
 	 */
 	public function viewHelperFormatsDateStringCorrectly() {
-		$viewHelper = new \TYPO3\CMS\Fluid\ViewHelpers\Format\DateViewHelper();
+		$viewHelper = new DateViewHelper();
 		$actualResult = $viewHelper->render('1980-12-13');
 		$this->assertEquals('1980-12-13', $actualResult);
 	}
@@ -69,7 +70,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @test
 	 */
 	public function viewHelperRespectsCustomFormat() {
-		$viewHelper = new \TYPO3\CMS\Fluid\ViewHelpers\Format\DateViewHelper();
+		$viewHelper = new DateViewHelper();
 		$actualResult = $viewHelper->render(new \DateTime('1980-02-01'), 'd.m.Y');
 		$this->assertEquals('01.02.1980', $actualResult);
 	}
@@ -78,6 +79,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @test
 	 */
 	public function viewHelperReturnsEmptyStringIfNULLIsGiven() {
+		/** @var DateViewHelper|\PHPUnit_Framework_MockObject_MockObject $viewHelper */
 		$viewHelper = $this->getMock('TYPO3\\CMS\\Fluid\\ViewHelpers\\Format\\DateViewHelper', array('renderChildren'));
 		$viewHelper->expects($this->once())->method('renderChildren')->will($this->returnValue(NULL));
 		$actualResult = $viewHelper->render();
@@ -89,7 +91,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 */
 	public function viewHelperUsesDefaultIfNoSystemFormatIsAvailable() {
 		$GLOBALS['TYPO3_CONF_VARS']['SYS']['ddmmyy'] = '';
-		$viewHelper = new \TYPO3\CMS\Fluid\ViewHelpers\Format\DateViewHelper();
+		$viewHelper = new DateViewHelper();
 		$actualResult = $viewHelper->render('@1391876733');
 		$this->assertEquals('2014-02-08', $actualResult);
 	}
@@ -99,7 +101,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 */
 	public function viewHelperUsesSystemFormat() {
 		$GLOBALS['TYPO3_CONF_VARS']['SYS']['ddmmyy'] = 'l, j. M y';
-		$viewHelper = new \TYPO3\CMS\Fluid\ViewHelpers\Format\DateViewHelper();
+		$viewHelper = new DateViewHelper();
 		$actualResult = $viewHelper->render('@1391876733');
 		$this->assertEquals('Saturday, 8. Feb 14', $actualResult);
 	}
@@ -109,7 +111,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @expectedException \TYPO3\CMS\Fluid\Core\ViewHelper\Exception
 	 */
 	public function viewHelperThrowsExceptionIfDateStringCantBeParsed() {
-		$viewHelper = new \TYPO3\CMS\Fluid\ViewHelpers\Format\DateViewHelper();
+		$viewHelper = new DateViewHelper();
 		$viewHelper->render('foo');
 	}
 
@@ -117,16 +119,29 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @test
 	 */
 	public function viewHelperUsesChildNodesIfDateAttributeIsNotSpecified() {
+		/** @var DateViewHelper|\PHPUnit_Framework_MockObject_MockObject $viewHelper */
 		$viewHelper = $this->getMock('TYPO3\\CMS\\Fluid\\ViewHelpers\\Format\\DateViewHelper', array('renderChildren'));
 		$viewHelper->expects($this->once())->method('renderChildren')->will($this->returnValue(new \DateTime('1980-12-13')));
 		$actualResult = $viewHelper->render();
 		$this->assertEquals('1980-12-13', $actualResult);
 	}
 
+	/**
+	 * @test
+	 */
+	public function viewHelperUsesChildNodesWithTimestamp() {
+		/** @var DateViewHelper|\PHPUnit_Framework_MockObject_MockObject $viewHelper */
+		$viewHelper = $this->getMock('TYPO3\\CMS\\Fluid\\ViewHelpers\\Format\\DateViewHelper', array('renderChildren'));
+		$viewHelper->expects($this->once())->method('renderChildren')->will($this->returnValue('1359891658'));
+		$actualResult = $viewHelper->render();
+		$this->assertEquals('2013-02-03', $actualResult);
+	}
+
 	/**
 	 * @test
 	 */
 	public function dateArgumentHasPriorityOverChildNodes() {
+		/** @var DateViewHelper|\PHPUnit_Framework_MockObject_MockObject $viewHelper */
 		$viewHelper = $this->getMock('TYPO3\\CMS\\Fluid\\ViewHelpers\\Format\\DateViewHelper', array('renderChildren'));
 		$viewHelper->expects($this->never())->method('renderChildren');
 		$actualResult = $viewHelper->render('1980-12-12');
@@ -156,6 +171,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @dataProvider viewHelperRespectsDefaultTimezoneForIntegerTimestampDataProvider
 	 */
 	public function viewHelperRespectsDefaultTimezoneForIntegerTimestamp($timezone, $expected) {
+		/** @var DateViewHelper|\PHPUnit_Framework_MockObject_MockObject $viewHelper */
 		$viewHelper = $this->getMock('TYPO3\\CMS\\Fluid\\ViewHelpers\\Format\\DateViewHelper', array('renderChildren'));
 
 		$date = 1359891658; // 2013-02-03 11:40 UTC
@@ -201,6 +217,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @test
 	 */
 	public function viewHelperRespectsDefaultTimezoneForStringTimestamp($timeZone, $date, $expected) {
+		/** @var DateViewHelper|\PHPUnit_Framework_MockObject_MockObject $viewHelper */
 		$viewHelper = $this->getMock('TYPO3\\CMS\\Fluid\\ViewHelpers\\Format\\DateViewHelper', array('renderChildren'));
 		$format = 'Y-m-d H:i';
 
@@ -232,6 +249,7 @@ class DateViewHelperTest extends \TYPO3\CMS\Core\Tests\UnitTestCase {
 	 * @test
 	 */
 	public function dateViewHelperFormatsDateLocalized($locale, $expected) {
+		/** @var DateViewHelper|\PHPUnit_Framework_MockObject_MockObject $viewHelper */
 		$viewHelper = $this->getMock('TYPO3\\CMS\\Fluid\\ViewHelpers\\Format\\DateViewHelper', array('renderChildren'));
 		$format = '%d. %B %Y';
 		// 2013-02-03 11:40 UTC