<?php
$args = array( 'post_type' => 'konzerte', 'posts_per_page' => 3 );
$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post();
echo  '<div class="concert-date">';
echo  '<div class="concert-month">';
global $wp_query;
$postid = $wp_query->post->ID;
echo get_post_meta($postid, 'Monat', true);
echo '</div>';
echo '<div class="concert-day">';
$postid = $wp_query->post->ID;
echo get_post_meta($postid, 'Tag', true);
echo '</div>';
echo '</div>';
echo '<div class="concert-meta">';
the_title();
echo '<div class="entry-content">';
the_excerpt();
echo '<div class="btn_fcbk">';
echo '<a class="concert-facebook" href="';
$postid = $wp_query->post->ID;
echo get_post_meta($postid, 'Facebook-URL', true);
echo '" target="_blank">Event auf Facebook</a>';
echo '</div>';

echo '</div>';
echo '<br clear="both" />';
echo '</div>';

endwhile; ?>