diff --git a/src/Symfony/Component/HttpFoundation/HeaderBag.php b/src/Symfony/Component/HttpFoundation/HeaderBag.php
index 2360e55bb4..64b8bd7c4e 100644
--- a/src/Symfony/Component/HttpFoundation/HeaderBag.php
+++ b/src/Symfony/Component/HttpFoundation/HeaderBag.php
@@ -235,6 +235,14 @@ class HeaderBag implements \IteratorAggregate, \Countable
             return $default;
         }
 
+        if (-1 === $value) {
+            /**
+             * Since we need to return a valid date time a older date has been chosen
+             * https://github.com/symfony/symfony/pull/6471#discussion_r2527156
+             */
+            $value = 'Sat, 01 Jan 00 00:00:00 +0000';
+        }
+
         if (false === $date = \DateTime::createFromFormat(DATE_RFC2822, $value)) {
             throw new \RuntimeException(sprintf('The %s HTTP header is not parseable (%s).', $key, $value));
         }
diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index 7428b9a9c3..a25572138a 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -693,6 +693,10 @@ class Response
         }
 
         if (null !== $this->getExpires()) {
+            if (!$this->getExpires() instanceof \DateTime) {
+                return 0;
+            }
+
             return $this->getExpires()->format('U') - $this->getDate()->format('U');
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
index 4fc93c33ef..38853ecc8c 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
@@ -164,6 +164,11 @@ class ResponseTest extends \PHPUnit_Framework_TestCase
         $response->headers->set('Expires', $this->createDateTimeOneHourLater()->format(DATE_RFC2822));
         $this->assertEquals(3600, $response->getMaxAge(), '->getMaxAge() falls back to Expires when no max-age or s-maxage directive present');
 
+        $response = new Response();
+        $response->headers->set('Cache-Control', 'must-revalidate');
+        $response->headers->set('Expires', -1);
+        $this->assertEquals('Sat, 01 Jan 00 00:00:00 +0000', $response->getExpires()->format(DATE_RFC822));
+
         $response = new Response();
         $this->assertNull($response->getMaxAge(), '->getMaxAge() returns null if no freshness information available');
     }
@@ -214,6 +219,11 @@ class ResponseTest extends \PHPUnit_Framework_TestCase
         $response = new Response();
         $response->expire();
         $this->assertFalse($response->headers->has('Age'), '->expire() does nothing when the response does not include freshness information');
+
+        $response = new Response();
+        $response->headers->set('Expires', -1);
+        $response->expire();
+        $this->assertEquals(0, $response->headers->get('Age'), '->expire() does not set the Age to 0');
     }
 
     public function testGetTtl()