diff --git a/Layout/default/Timerecording/Index.php b/Layout/default/Timerecording/Index.php
index 3d3eefab8..d4bbd8b9c 100644
--- a/Layout/default/Timerecording/Index.php
+++ b/Layout/default/Timerecording/Index.php
@@ -15,7 +15,7 @@ $monthger[12] = "Dezember";
 $time = time();
 for ($i = 1; $i <= 25; $i++) {
     $kw = date('W', $time);
-    $year = date('Y', $time);
+    $year = date('o', $time);
     $timestamp_montag = strtotime("{$year}-W{$kw}");
     $timestamp_freitag = strtotime("{$year}-W{$kw}-7");
     $weeks[$time] = "KW" . $kw . " " . $year . " (" . date('d.m', $timestamp_montag) . "-" . date('d.m', $timestamp_freitag) . ")";
diff --git a/application/Timerecording/TimerecordingController.php b/application/Timerecording/TimerecordingController.php
index b785362c2..e28d7a9ac 100644
--- a/application/Timerecording/TimerecordingController.php
+++ b/application/Timerecording/TimerecordingController.php
@@ -687,7 +687,7 @@ class TimerecordingController extends mfBaseController
 
         if ($datatype == 1) {
             $kw = date('W', $dataweek);
-            $year = date('Y', $dataweek);
+            $year = date('o', $dataweek);
             $timestamp_montag = strtotime("{$year}-W{$kw}");
             $timestamp_sonntag = strtotime("{$year}-W{$kw}-7");
             $firstdate = strtotime(date("Y-m-d", $timestamp_montag) . " 00:00:00");
@@ -1068,7 +1068,7 @@ class TimerecordingController extends mfBaseController
 
 
         $kw = date('W', $dataweek);
-        $year = date('Y', $dataweek);
+        $year = date('o', $dataweek);
         $timestamp_montag = strtotime("{$year}-W{$kw}");
         $timestamp_sonntag = strtotime("{$year}-W{$kw}-7");
         $firstdate = strtotime(date("Y-m-d", $timestamp_montag) . " 00:00:00");