--- common.inc.orig   2007-10-18 04:28:59.000000000 +0700
+++ common.inc  2007-12-22 12:21:39.095886667 +0700
@@ -1092,6 +1092,13 @@
     if (strpos('AaDFlM', $c) !== FALSE) {
       $date .= t(gmdate($c, $timestamp));
     }
+    else if (strpos('Xx', $c) !== FALSE) {
+      $y = strftime('%Ey', $timestamp);
+      if ($c == 'x') {
+        $y .= substr($y, -2);
+      }
+      $date .= $y;
+    }
     else if (strpos('BdgGhHiIjLmnsStTUwWYyz', $c) !== FALSE) {
       $date .= gmdate($c, $timestamp);
     }