PHP: DateTime::createFromFormat() with timezone

(PHP 5 >= 5.3.0) you actually enter the third parameter

public static DateTime DateTime::createFromFormat(string $format , string $time[, DateTimeZone $timezone])

$date = DateTime::createFromFormat('d/m/Y', $date, new DateTimeZone('Europe/Berlin'));

Just use DateTime::setTimeZone():

$date = DateTime::createFromFormat('d/m/Y', $date);
$date->setTimeZone(new DateTimeZone('America/New_York'));
$date = $date->format('Y-m-d');