Sort items within a page

Hi. I’ve paid someone to set up my website using WordPress, but he’s not answering my emails. The guy has created a page template which automatically adds and sorts other pages. However, they’re sorting alphabetically and I’d like to be able to sort them by date/time created. The code for the page template is below. Any help would be greatly appreciated. Cheers.

<?php
/*Template Name:Collections*/
get_header();
?>
<div class="container protfolio-page left-space">
	<div class="row">
		<div class="col-sm-12">
			<h4 class="section-title"><?php the_title(); ?></h4>
		</div>
	</div>
	<div class="row">
		<div class="col-sm-12 projects-intro">
			<h1><?php the_field("page_heading"); ?></h1>
			<h4><?php the_field("page_sub_heading"); ?></h4>
		</div>
	</div>

	<?php
		$args = array(
			'post_type' => 'page',
			'post_status' => 'publish',
			'meta_key' => '_wp_page_template',
			'meta_value' => 'template-home-art.php'
		);
	$pages = get_pages($args);

	foreach($pages as $page){
		if($page->post_title != 'Home'){
			?>
			<div class="col-sm-6 nlp collection no-float">
				<a>ID); ?>"><div class="collection-cover"><?php echo get_the_post_thumbnail($page->ID, 'full'); ?></div></a>
				<h4><?php echo $page->post_title; ?></h4>
				<p><?php $description = get_post_meta($page->ID, 'collection_description'); echo $description[0]; ?></p>
			</div>

			<?php
		}
	}

	?>

</div>

<script type="text/javascript">
    jQuery(document).ready(function($){
        $(".filterable").mixitup({
            targetSelector : "div.project_block",
            filterLogic : "and",
            multiFilter : true
        });
    });
    project_page = 1;
</script>
<?php get_footer(); ?>

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