diff -ur DateTime.pm /Volumes/webgui/WebGUI/lib/WebGUI/Form/DateTime.pm 
--- DateTime.pm 2007-12-13 15:43:53.000000000 +0200
+++ /Volumes/webgui/WebGUI/lib/WebGUI/Form/DateTime.pm  2007-12-13 15:58:38.000000000 +0200
@@ -178,6 +178,7 @@
         $self->session->style->setScript($self->session->url->extras('calendar/calendar-setup.js'),{ type=>'text/javascript' });
         $self->session->style->setLink($self->session->url->extras('calendar/calendar-win2k-1.css'), { rel=>"stylesheet", type=>"text/css", media=>"all" });
        my $mondayFirst = $self->session->user->profileField("firstDayOfWeek") ? "true" : "false";
+       my $timeFormat = ($self->session->user->profileField("timeFormat") =~ /%j/) ? "24" : "12";
         return WebGUI::Form::Text->new($self->session,
                 name=>$self->get("name"),
                 value=>$value,
@@ -191,7 +192,7 @@
                                 ifFormat : "%Y-%m-%d %H:%M:%S", 
                                 showsTime : true, 
                                 step : 1,
-                                timeFormat : "12",
+                                timeFormat : '.$timeFormat.',
                                 firstDay : '.$mondayFirst.'
                                 }); 
                         </script>';