diff --git a/Layout/default/TimerecordingReport/Index.php b/Layout/default/TimerecordingReport/Index.php
index 1a25064a2..085b5b7eb 100644
--- a/Layout/default/TimerecordingReport/Index.php
+++ b/Layout/default/TimerecordingReport/Index.php
@@ -24,7 +24,7 @@ ksort($timerecordingUsers);
 
 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");
 
diff --git a/application/TimerecordingReport/TimerecordingReportController.php b/application/TimerecordingReport/TimerecordingReportController.php
index 44115c0ad..bbaf8a881 100644
--- a/application/TimerecordingReport/TimerecordingReportController.php
+++ b/application/TimerecordingReport/TimerecordingReportController.php
@@ -101,7 +101,7 @@ class TimerecordingReportController 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");
@@ -562,7 +562,7 @@ class TimerecordingReportController 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");