diff --git a/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver/DateTimeValueResolver.php b/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver/DateTimeValueResolver.php
index a73a7e1b47a27..0cfd42badc974 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver/DateTimeValueResolver.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver/DateTimeValueResolver.php
@@ -73,7 +73,7 @@ public function resolve(Request $request, ArgumentMetadata $argument): array
         }
 
         if (null !== $format) {
-            $date = $class::createFromFormat($format, $value);
+            $date = $class::createFromFormat($format, $value, $this->clock?->now()->getTimeZone());
 
             if (($class::getLastErrors() ?: ['warning_count' => 0])['warning_count']) {
                 $date = false;
@@ -83,7 +83,7 @@ public function resolve(Request $request, ArgumentMetadata $argument): array
                 $value = '@'.$value;
             }
             try {
-                $date = new $class($value);
+                $date = new $class($value, $this->clock?->now()->getTimeZone());
             } catch (\Exception) {
                 $date = false;
             }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/DateTimeValueResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/DateTimeValueResolverTest.php
index c56cbeb5e335f..6529ca9f7640b 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/DateTimeValueResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/DateTimeValueResolverTest.php
@@ -84,8 +84,8 @@ public function testUnsupportedArgument()
      */
     public function testFullDate(string $timezone, bool $withClock)
     {
-        date_default_timezone_set($timezone);
-        $resolver = new DateTimeValueResolver($withClock ? new MockClock() : null);
+        date_default_timezone_set($withClock ? 'UTC' : $timezone);
+        $resolver = new DateTimeValueResolver($withClock ? new MockClock('now', $timezone) : null);
 
         $argument = new ArgumentMetadata('dummy', \DateTimeImmutable::class, false, false, null);
         $request = self::requestWithAttributes(['dummy' => '2012-07-21 00:00:00']);
@@ -103,7 +103,7 @@ public function testFullDate(string $timezone, bool $withClock)
      */
     public function testUnixTimestamp(string $timezone, bool $withClock)
     {
-        date_default_timezone_set($timezone);
+        date_default_timezone_set($withClock ? 'UTC' : $timezone);
         $resolver = new DateTimeValueResolver($withClock ? new MockClock('now', $timezone) : null);
 
         $argument = new ArgumentMetadata('dummy', \DateTimeImmutable::class, false, false, null);
@@ -212,7 +212,7 @@ public function testCustomClass()
      */
     public function testDateTimeImmutable(string $timezone, bool $withClock)
     {
-        date_default_timezone_set($timezone);
+        date_default_timezone_set($withClock ? 'UTC' : $timezone);
         $resolver = new DateTimeValueResolver($withClock ? new MockClock('now', $timezone) : null);
 
         $argument = new ArgumentMetadata('dummy', \DateTimeImmutable::class, false, false, null);
@@ -231,7 +231,7 @@ public function testDateTimeImmutable(string $timezone, bool $withClock)
      */
     public function testWithFormat(string $timezone, bool $withClock)
     {
-        date_default_timezone_set($timezone);
+        date_default_timezone_set($withClock ? 'UTC' : $timezone);
         $resolver = new DateTimeValueResolver($withClock ? new MockClock('now', $timezone) : null);
 
         $argument = new ArgumentMetadata('dummy', \DateTimeInterface::class, false, false, null, false, [