Ticket #33059: 33059.patch

src/wp-admin/js/post.js

@@ -650 +650 @@
                 $timestampdiv.siblings('a.edit-timestamp').click( function( event ) {
                         if ( $timestampdiv.is( ':hidden' ) ) {
                                 $timestampdiv.slideDown('fast');
-                                $('#mm').focus();
+                                $( 'input:visible, select', $timestampdiv ).first().focus();
                                 $(this).hide();
                         }
                         event.preventDefault();