Hi @dsgnr
Try something like this:
<?php
$date = get_field('YOUR_ACF_FIELD_NAME');
echo date('F Y', strtotime($date));
// F = A full textual representation of a month, such as January or March
// Y = A full numeric representation of a year, 4 digits
?>
Other date formats can be found on this site: http://php.net/manual/de/function.date.php
Hope i could help you.