diff --git a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
index 8a0028ce17f11..dc553ad8dd044 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
@@ -57,8 +57,8 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
         if ('single_text' === $options['widget']) {
             $builder->addViewTransformer(new DateTimeToLocalizedStringTransformer(
-                'UTC',
-                'UTC',
+                null,
+                null,
                 $dateFormat,
                 $timeFormat,
                 $calendar,
@@ -73,7 +73,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 \Locale::getDefault(),
                 $dateFormat,
                 $timeFormat,
-                'UTC',
+                null,
                 $calendar,
                 $pattern
             );
@@ -105,7 +105,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 ->add('month', $options['widget'], $monthOptions)
                 ->add('day', $options['widget'], $dayOptions)
                 ->addViewTransformer(new DateTimeToArrayTransformer(
-                    'UTC', 'UTC', array('year', 'month', 'day')
+                    null, null, array('year', 'month', 'day')
                 ))
                 ->setAttribute('formatter', $formatter)
             ;
@@ -113,15 +113,15 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
         if ('string' === $options['input']) {
             $builder->addModelTransformer(new ReversedTransformer(
-                new DateTimeToStringTransformer('UTC', 'UTC', 'Y-m-d')
+                new DateTimeToStringTransformer(null, null, 'Y-m-d')
             ));
         } elseif ('timestamp' === $options['input']) {
             $builder->addModelTransformer(new ReversedTransformer(
-                new DateTimeToTimestampTransformer('UTC', 'UTC')
+                new DateTimeToTimestampTransformer(null, null)
             ));
         } elseif ('array' === $options['input']) {
             $builder->addModelTransformer(new ReversedTransformer(
-                new DateTimeToArrayTransformer('UTC', 'UTC', array('year', 'month', 'day'))
+                new DateTimeToArrayTransformer(null, null, array('year', 'month', 'day'))
             ));
         }
     }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php b/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
index 236a546dc4339..63d56d6899b8d 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
@@ -48,7 +48,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         }
 
         if ('single_text' === $options['widget']) {
-            $builder->addViewTransformer(new DateTimeToStringTransformer('UTC', 'UTC', $format));
+            $builder->addViewTransformer(new DateTimeToStringTransformer(null, null, $format));
         } else {
             $hourOptions = $minuteOptions = $secondOptions = array(
                 'error_bubbling' => true,
@@ -109,20 +109,20 @@ public function buildForm(FormBuilderInterface $builder, array $options)
                 $builder->add('second', $options['widget'], $secondOptions);
             }
 
-            $builder->addViewTransformer(new DateTimeToArrayTransformer('UTC', 'UTC', $parts, 'text' === $options['widget']));
+            $builder->addViewTransformer(new DateTimeToArrayTransformer(null, null, $parts, 'text' === $options['widget']));
         }
 
         if ('string' === $options['input']) {
             $builder->addModelTransformer(new ReversedTransformer(
-                new DateTimeToStringTransformer('UTC', 'UTC', 'H:i:s')
+                new DateTimeToStringTransformer(null, null, 'H:i:s')
             ));
         } elseif ('timestamp' === $options['input']) {
             $builder->addModelTransformer(new ReversedTransformer(
-                new DateTimeToTimestampTransformer('UTC', 'UTC')
+                new DateTimeToTimestampTransformer(null, null)
             ));
         } elseif ('array' === $options['input']) {
             $builder->addModelTransformer(new ReversedTransformer(
-                new DateTimeToArrayTransformer('UTC', 'UTC', $parts)
+                new DateTimeToArrayTransformer(null, null, $parts)
             ));
         }
     }