Hi. I accomplished this manually:
$currentyear = date('Y');
$archiveyear = get_the_date('Y');
$currentyear = intval($currentyear);
$previousyear = intval($archiveyear) - 1;
$nextyear = intval($archiveyear) + 1;
then used it in the template like so:
<?php if ($nextyear <= $currentyear) { ?>
<a href="/blog/<?php echo $nextyear; ?>">Next</a>
<?php } ?>
