Index: wp-includes/general-template.php
===================================================================
--- wp-includes/general-template.php	(revision 55889)
+++ wp-includes/general-template.php	(working copy)
@@ -2150,7 +2150,7 @@
 					$arc_week_end   = date_i18n( get_option( 'date_format' ), $arc_week['end'] );
 					$url            = add_query_arg(
 						array(
-							'm' => $arc_year,
+							'y' => $arc_year,
 							'w' => $result->week,
 						),
 						home_url( '/' )