diff --git a/fhem/FHEM/98_GEOFANCY.pm b/fhem/FHEM/98_GEOFANCY.pm
index 1547a87f3..835abcd5e 100755
--- a/fhem/FHEM/98_GEOFANCY.pm
+++ b/fhem/FHEM/98_GEOFANCY.pm
@@ -262,7 +262,7 @@ sub GEOFANCY_CGI() {
           )
           if ( defined( $webArgs->{date} )
             && $webArgs->{date} !~
-m/(19|20)\d\d-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])T(0[1-9]|1[0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])Z/
+m/(19|20)\d\d-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])T([0-1][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])Z/
           );
 
         # validate locName