add the year to this function

I”ve been trying various methods of adding the year to this function, but I keep breaking the page. How can I sort by just the current year?

<?php
	global $post;
	$categories = get_the_category();
	$category = $categories[0];
	$cat_ID = $category->cat_ID;
	$myposts = get_posts("numberposts=20&category=$cat_ID");
	?>
	<?php foreach($myposts as $post) :?>
	<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
	<?php endforeach; ?>

After this list I’ll (try to) add a link to archives for posts in this category by year.