<table class="programm">
    <?php $args = array( 'post_type' => 'programm', 'orderby' => 'date', 'order' => 'ASC' );
        $loop = new WP_Query( $args );
        while ( $loop->have_posts() ) : $loop->the_post();
        $programmDetails = get_post_meta($post->ID,'programmDetails',true);
        ?>
            <?php foreach((array)$programmDetails as $pD ){
                if (isset($pD['date']) || isset($pD['desc']) ): ?>
                    <tr>
                        <td><?php echo $pD['date'] ?></td>
                        <td><?php echo $pD['desc'] ?></td>
                    </tr>
                <?php endif; } ?>
        <?php endwhile; ?>
    </table>