How to Show a Post From Exactly One Year Ago Today
There may be certain special occasions where you’d like to show a post from one year ago.
Perhaps you’d like to dedicate a portion of your sidebar or footer to show a post from exactly one year ago. Drop this snippet anywhere in your theme’s template files where you want the post to appear:
<?php $current_day = date('j'); $last_year = date('Y')-1; query_posts('day='.$current_day.'&year='.$last_year); if (have_posts()): while (have_posts()) : the_post(); the_title(); the_excerpt(); endwhile; endif; ?>
Source: WP Recipes