Original code was giving me a strange 4-digit day of the month on the single page. I substituted in the correctly working string from index.php

single.php

@@ -14,7 +14,7 @@
 							
 									<h1 class="entry-title single-title" itemprop="headline"><?php the_title(); ?></h1>
                   <p class="byline vcard"><?php
-                    printf(__('Posted <time class="updated" datetime="%1$s" pubdate>%2$s</time> by <span class="author">%3$s</span> <span class="amp">&amp;</span> filed under %4$s.', 'bonestheme'), get_the_time('Y-m-j'), get_the_time(__('F js, Y', 'bonestheme')), bones_get_the_author_posts_link(), get_the_category_list(', '));
+                    printf(__('Posted <time class="updated" datetime="%1$s" pubdate>%2$s</time> by <span class="author">%3$s</span> <span class="amp">&amp;</span> filed under %4$s.', 'bonestheme'), get_the_time('Y-m-j'), get_the_time(get_option('date_format')), bones_get_the_author_posts_link(), get_the_category_list(', '));
                   ?></p>
 						
 								</header> <!-- end article header -->