<?php

			$posts = get_posts(array(
				'posts_per_page' 	=> 10,
				// 'cat' 				=> '-1',
				'order' 			=> 'ASC',
				'post_type'      	=> 'post',
				'orderby'   		=> 'meta_value',
				'meta_key' 			=> '_expiration-date',
				'paged'          	=> get_query_var( 'paged' ),
			));

			$group_posts = array();
				if( $posts ) {

				foreach( $posts as $post ) {
					$date = get_field('datum-concert', $post->ID, false);

					$date = new DateTime($date);
					$year = date_i18n('Y', strtotime( get_field('datum-concert', $post->ID, false) ) );
					$month = date_i18n('F', strtotime( get_field('datum-concert', $post->ID, false) ) );

					$group_posts[$year][$month][] = array($post, $date);
				}}

				foreach ($group_posts as $yearKey => $years) {
				foreach ($years as $monthKey => $months) {

					if ( is_user_logged_in() ) { ?> <div id="ads-leaderboard" class="ads"></div> <?php }
					echo '<h2 style="text-transform: capitalize; text-align: center;" id="';
					echo $monthKey.'-'.$yearKey;
					echo '">';
					echo $monthKey;
					echo ' ';
					echo $yearKey;
					echo '</h2>';

				foreach ($months as $postKey => $posts) { ?>
					<?php while ( have_posts() ) : the_post(); ?>
					<?php get_template_part( '/includes/content-templates/concert-single' ); ?>
					<?php endwhile;
				}}}

		?>