public function frontend()
{
if (!isset($this->options["format"]) || !$this->options["format"]) {
$this->options["format"] = \DateTime::ISO8601;
}
if ($this->date instanceof \Zend_Date) {
return $this->date->toString($this->options["format"], "php");
} elseif ($this->date instanceof \DateTimeInterface) {
return $this->date->formatLocalized($this->options["format"]);
}
}