Multisite and items in main blog from other blogs

Hi,
I use WordPress 4 multisite with Pinboard theme. I want show items from other blogs order by date in my main blog .
I managed to publish articles from other blogs on my main blog, but I can not order them by date.
My code :

<?php
/*
Template Name: Blogs, Left Sidebar
*/
?><?php get_header(); ?>
	<?php global $pinboard_page_template; ?>
	<?php $pinboard_page_template = 'template-blog-left-sidebar-blogs.php'; ?>
	<?php if( pinboard_get_option( 'location' ) ) : ?>
		<?php pinboard_current_location(); ?>
	<?php endif; ?>
	<div id="container">
		<section id="content" class="column twothirdcol">
			<?php $args = array(
'orderby' => 'date',
'order' => 'DESC',
'posts_per_page' => '1',
'paged' => max( 1, get_query_var( 'paged' ) )
); ?>
			<?php if( pinboard_get_option( 'blog_exclude_portfolio' ) ) : ?>
				<?php $args['cat'] = '-' . pinboard_get_option( 'portfolio_cat' ); ?>
			<?php endif; ?>
            <?php $original_blog_id = get_current_blog_id(); ?>
            <?php $bids = array(20,21,22,23,24,27,8,28,29,25,30,26,14,31,33,34,38,41,42,43);
			foreach($bids as $bid):
			switch_to_blog($bid); //switched to blog with blog_id $bid
?>

             <?php $wp_query = new WP_Query( $args ); ?>
<?php if( $wp_query->have_posts() ) : ?>
				<div class="entries">
					<?php while( $wp_query->have_posts() ) : $wp_query->the_post(); ?>
						<?php get_template_part( 'content_blogs', get_post_format() ); ?>

					<?php endwhile; ?>
				</div><!-- .entries -->
			<?php else : ?>
				<?php pinboard_404(); ?>
			<?php endif; ?>

			<?php wp_reset_postdata(); ?>
			<?php $wp_query = $wp_the_query; ?>
            <?php
			 endforeach ;
			switch_to_blog( $original_blog_id ); ?>
		</section><!-- #content -->
		<?php get_sidebar(); ?>
		<div class="clear"></div>
	</div><!-- #container -->
<?php get_footer(); ?>

If anyone can help me it would be nice!
Tanks,
Seb
(Sorry for my english)