public function __construct(EventEntity $event, array $languages, array $talkTypes, array $tracks)
{
$this->timezone = $event->getFullTimezone();
$tz = new \DateTimeZone($this->timezone);
$this->startDate = new \DateTimeImmutable($event->getStartDate(), $tz);
$this->endDate = new \DateTimeImmutable($event->getEndDate(), $tz);
$this->languages = $languages;
$this->talkTypes = $talkTypes;
$this->tracks = $tracks;
}
