diff --git a/phpgwapi/inc/class.datetime.inc.php b/phpgwapi/inc/class.datetime.inc.php
index e46ef14c53..502c973411 100755
--- a/phpgwapi/inc/class.datetime.inc.php
+++ b/phpgwapi/inc/class.datetime.inc.php
@@ -425,40 +425,12 @@
 		/*!
 		@function days_between
 		@abstract Get the number of days between two dates
-		@author Steven Cramer
+		@author Steven Cramer/Ralf Becker
 		@param $m1 - Month_1, $d1 - Day_1, $y1 - Year_1, $m2 - Month_2, $d2 - Day_2, $y2 - Year_2
 		*/
 		function days_between($m1,$d1,$y1,$m2,$d2,$y2)
 		{
-//			$start = "$d1.$m1.$y1";
-
-			if ($y1 == $y2 && $m1 == $m2)
-			{
-				$days = $d2 - $d1;
-			}
-			else
- 			{
-				$days = $this->days_in_month($m1,$y1) - $d1;
-				while ($m1 != $m2 || $y1 != $y2)
-				{
-					if ($m1+1 == 13)
-					{
-						$m1 = 1;
-						$y1++;
-					}
-					else 
-					{
-						$m1++;
-					}
-
-					if ($m1 != $m2 || $y1 != $y2)
-					{
-						$days += $this->days_in_month($m1,$y1);
-					}
-				}
-				$days += $d2;
-			}
-			return $days;
+			return intval((mktime(0,0,0,$m2,$d2,$y2) - mktime(0,0,0,$m1,$d1,$y1)) / 86400);
 		}
 
 		function date_compare($a_year,$a_month,$a_day,$b_year,$b_month,$b_day)