DateHelper.php

<?php

namespace Bundle\TestBundle\Helper;

use Symfony\Components\Templating\Helper\Helper;
use Symfony\Components\DependencyInjection\ContainerInterface;
use Symfony\Components\OutputEscaper\Escaper;

class DateHelper extends Helper
{

  protected $container;

  public function __construct(ContainerInterface $container)
  {
    $this->container = $container;
  }

  public function getName(){
    return 'date';
  }

  public function format(\DateTime $date, $format = 'd', $culture = ''){

    if($culture == ''){
      $culture = $this->container->getUserService()->getCulture();
    }

    $d = $date->format('Y-m-d H:i:s');

    $formater =  new \IntlDateFormatter($culture,
                      \IntlDateFormatter::FULL,
                      \IntlDateFormatter::FULL,
                      date_default_timezone_get(),
                      \IntlDateFormatter::GREGORIAN ,
                      $format);
    return $formater->format(strtotime($d));
  }
}