diff --git a/index.php b/index.php
index 7dc7b44a..68f7ba68 100644
--- a/index.php
+++ b/index.php
@@ -380,7 +380,7 @@ if ($bb_cfg['birthday_check_day'] && $bb_cfg['birthday_enabled'])
 				$week_all = true;
 				continue;
 			}
-			$week_list[] = profile_url($week) .' <span class="small">('. birthday_age($week['user_birthday']-1) .')</span>';
+			$week_list[] = profile_url($week) .' <span class="small">('. birthday_age(date('Y-m-d', strtotime('-1 year', strtotime($week['user_birthday'])))) .')</span>';
 		}
 		$week_all = ($week_all) ? '&nbsp;<a class="txtb" href="#" onclick="ajax.exec({action: \'index_data\', mode: \'birthday_week\'}); return false;" title="'. $lang['ALL'] .'">...</a>' : '';
 		$week_list = sprintf($lang['BIRTHDAY_WEEK'], $bb_cfg['birthday_check_day'], join(', ', $week_list)) . $week_all;
diff --git a/library/ajax/index_data.php b/library/ajax/index_data.php
index debd9fcd..3f111d93 100644
--- a/library/ajax/index_data.php
+++ b/library/ajax/index_data.php
@@ -19,7 +19,7 @@ switch($mode)
 		{
 			foreach($stats['birthday_week_list'] as $week)
 			{
-				$html[] = profile_url($week) .' <span class="small">('. birthday_age($week['user_birthday']) .')</span>';
+				$html[] = profile_url($week) .' <span class="small">('. birthday_age(date('Y-m-d', strtotime('-1 year', strtotime($week['user_birthday'])))) .')</span>';
 			}
 			$html = sprintf($lang['BIRTHDAY_WEEK'], $bb_cfg['birthday_check_day'], join(', ', $html));
 		}