/**
* {@inheritdoc}
*/
public function convertToDatabaseValue($value, AbstractPlatform $platform)
{
if ($value === null) {
return null;
}
$value->setTimeZone(self::$utc ? self::$utc : (self::$utc = new \DateTimeZone('UTC')));
return parent::convertToDatabaseValue($value, $platform);
}