diff --git a/lib/kolab_sync_data_tasks.php b/lib/kolab_sync_data_tasks.php
--- a/lib/kolab_sync_data_tasks.php
+++ b/lib/kolab_sync_data_tasks.php
@@ -164,6 +164,28 @@
         return $as_array ? $result : new Syncroton_Model_Task($result);
     }
 
+
+
+    /**
+     * Returns a timezone with an offset matching the difference between $d1 and $d2
+     */
+    private static function getOffsetTimezone($d1, $d2)
+    {
+        $interval = $d1->diff($d2);
+        $tz = new DateTimeZone($interval->format('%R%H%I')); //e.g. +0200
+        $utcOffset = $tz->getOffset(new DateTime('now', $timezone));
+        //Look for a timezone with a matching offset. We can't store offsets directly
+        foreach (DateTimeZone::listIdentifiers() as $timezoneIdentifier) {
+            $timezone = new DateTimeZone($timezoneIdentifier);
+            $dt = new DateTime('now', $timezone);
+            if ($timezone->getOffset($dt) == $utcOffset) {
+                return $timezone;
+            }
+        }
+        return null;
+    }
+
+
     /**
      * convert contact from xml to libkolab array
      *
@@ -186,6 +208,25 @@
             $value = $data->$key;
 
             switch ($name) {
+
+            case 'due':
+            case 'start':
+                // We expect to always get regular and utc variants, so we only need to take one into account.
+                if ($key == 'utcStartDate' || $key == 'utcDueDate') {
+                    continue 2;
+                }
+                if ($value) {
+                    if ($name =='due' && $data->utcDueDate) {
+                        $tz = static::getOffsetTimezone($data->utcDueDate, $value);
+                        if ($tz) {
+                            //Setting the timezone will change the time, so we set it on the utc variant instead to end up with what we want.
+                            $value = $data->utcDueDate;
+                            $value->setTimezone($tz);
+                        }
+                    }
+                }
+                break;
+
             case 'sensitivity':
                 $map   = array_flip($this->sensitivityMap);
                 $value = $map[$value];