diff --git a/lib/Cake/Test/Case/Utility/CakeTimeTest.php b/lib/Cake/Test/Case/Utility/CakeTimeTest.php
index 028723b93..95370c25b 100644
--- a/lib/Cake/Test/Case/Utility/CakeTimeTest.php
+++ b/lib/Cake/Test/Case/Utility/CakeTimeTest.php
@@ -583,6 +583,9 @@ class CakeTimeTest extends CakeTestCase {
 
 		$result = $this->Time->format('nonsense', '%d-%m-%Y', 'invalid', 'UTC');
 		$this->assertEquals('invalid', $result);
+
+		$result = $this->Time->format('0000-00-00', '%d-%m-%Y', 'invalid');
+		$this->assertEquals('invalid', $result);
 	}
 
 /**
diff --git a/lib/Cake/Utility/CakeTime.php b/lib/Cake/Utility/CakeTime.php
index 635d0612b..dc546d6ce 100644
--- a/lib/Cake/Utility/CakeTime.php
+++ b/lib/Cake/Utility/CakeTime.php
@@ -316,6 +316,11 @@ class CakeTime {
 			return false;
 		}
 
+		$containsDummyDate = (is_string($dateString) && substr($dateString, 0, 10) === '0000-00-00');
+		if ($containsDummyDate) {
+			return false;
+		}
+
 		if (is_int($dateString) || is_numeric($dateString)) {
 			$date = intval($dateString);
 		} elseif (