diff --git admin/reports/report_canceled_orders.php admin/reports/report_canceled_orders.php
index 432645e..a58dd22 100644
--- admin/reports/report_canceled_orders.php
+++ admin/reports/report_canceled_orders.php
@@ -270,7 +270,7 @@ class Report_canceled_orders extends report_base
         $rs = oxDb::getDb()->execute( $sQ );
         if ( $rs != false && $rs->recordCount() > 0 ) {
             while ( !$rs->EOF ) {
-                $sKey = oxUtilsDate::getInstance()->getWeekNumber( $myConfig->getConfigParam( 'iFirstWeekDay' ), strtotime( $rs->fields[0] ) );
+                $sKey = oxUtilsDate::getInstance()->getWeekNumber( oxConfig::getConfigParam( 'iFirstWeekDay' ), strtotime( $rs->fields[0] ) );
                 if ( isset( $aDataX5[$sKey] ) ) {
                     $aDataX5[$sKey]++;
                 }
diff --git admin/reports/report_conversion_rate.php admin/reports/report_conversion_rate.php
index 1eba570..8f7cd63 100644
--- admin/reports/report_conversion_rate.php
+++ admin/reports/report_conversion_rate.php
@@ -73,8 +73,11 @@ class Report_conversion_rate extends report_base
         $aDataX = array();
         $aDataY = array();
 
-        $sTimeTo    = $oDb->quote( date( "Y-m-d H:i:s", strtotime( oxConfig::getParameter( "time_to" ) ) ) );
-        $sTimeFrom = $oDb->quote( date( "Y-m-d H:i:s", mktime( 23, 59, 59, date( "m", $dTimeTo)-12, date( "d", $dTimeTo), date( "Y", $dTimeTo)) ) );
+        $dTimeTo = strtotime( oxConfig::getParameter( "time_to" ) );
+        $dTimeFrom = mktime( 23, 59, 59, date( "m", $dTimeTo)-12, date( "d", $dTimeTo), date( "Y", $dTimeTo));
+
+        $sTimeTo    = $oDb->quote( date( "Y-m-d H:i:s", $dTimeTo) );
+        $sTimeFrom = $oDb->quote( date( "Y-m-d H:i:s", $dTimeFrom ) );;
 
         // orders
         $sSQL = "select oxtime, count(*) as nrof from oxlogs where oxtime >= $sTimeFrom and oxtime <= $sTimeTo group by oxsessid";
diff --git admin/reports/report_visitor_absolute.php admin/reports/report_visitor_absolute.php
index 29c8898..fa22185 100644
--- admin/reports/report_visitor_absolute.php
+++ admin/reports/report_visitor_absolute.php
@@ -77,8 +77,11 @@ class Report_visitor_absolute extends report_base
         $aDataX = array();
         $aDataY = array();
 
-        $sTimeTo   = $oDb->quote( date( "Y-m-d H:i:s", strtotime( oxConfig::getParameter( "time_to" ) ) ) );
-        $sTimeFrom = $oDb->quote( date( "Y-m-d H:i:s", mktime( 23, 59, 59, date( "m", $dTimeTo ) - 12, date( "d", $dTimeTo ), date( "Y", $dTimeTo ) ) ) );
+        $dTimeTo = strtotime( oxConfig::getParameter( "time_to" ) );
+        $dTimeFrom = mktime( 23, 59, 59, date( "m", $dTimeTo)-12, date( "d", $dTimeTo), date( "Y", $dTimeTo));
+
+        $sTimeTo   = $oDb->quote( date( "Y-m-d H:i:s", $dTimeTo ) );
+        $sTimeFrom = $oDb->quote( date( "Y-m-d H:i:s", $dTimeFrom ) );
 
         $sSQL = "select oxtime, count(*) as nrof from oxlogs where oxtime >= $sTimeFrom and oxtime <= $sTimeTo group by oxsessid";
         $aTemp = array();