diff --git a/calendar/inc/hook_about.inc.php b/calendar/inc/hook_about.inc.php
new file mode 100644
index 0000000000..9461ddfd39
--- /dev/null
+++ b/calendar/inc/hook_about.inc.php
@@ -0,0 +1,24 @@
+<?php
+    /**************************************************************************\
+    * phpGroupWare - about                                                     *
+    * http://www.phpgroupware.org                                              *
+    * --------------------------------------------                             *
+    * This program is free software; you can redistribute it and/or modify it  *
+    * under the terms of the GNU General Public License as published by the    *
+    * Free Software Foundation; either version 2 of the License, or (at your   *
+    * option) any later version.                                               *
+    \**************************************************************************/
+    /* $Id$ */
+
+	function about_app($tpl,$handle)
+	{
+		$t = CreateObject('phpgwapi.Template',$GLOBALS['phpgw']->common->get_tpl_dir('phpgwapi'));
+		$s = $t->set_file(array('about' => 'about_app.tpl'));
+		$s .= $t->set_var('app_title',lang('calendar'));
+		$s .= $t->set_var('based_on',lang('based on'));
+		$s .= $t->set_var('written_by',lang('written by'));
+		$s .= $t->set_var('source','Webcalendar by Craig Knudsen &lt;cknudsen@radix.net&gt;<br>http://www.radix.net/~cknudsen');
+		$s .= $t->set_var('developers','Mark Peters &lt;skeeter@phpgroupware.org&gt;');
+		$s .= $t->fp('out','about');
+		return $s;
+	}
diff --git a/calendar/setup/setup.inc.php b/calendar/setup/setup.inc.php
index d86c4168ef..b8c571b99f 100755
--- a/calendar/setup/setup.inc.php
+++ b/calendar/setup/setup.inc.php
@@ -24,17 +24,21 @@
 	$setup_info['calendar']['tables'][] = 'phpgw_cal_alarm';
 
 	/* The hooks this app includes, needed for hooks registration */
-	$setup_info['calendar']['hooks'][] = 'add_def_prefs';
-	$setup_info['calendar']['hooks'][] = 'admin';
-	$setup_info['calendar']['hooks'][] = 'deleteaccount';
-	$setup_info['calendar']['hooks'][] = 'email';
-	$setup_info['calendar']['hooks'][] = 'home';
-	$setup_info['calendar']['hooks'][] = 'home_day';
-	$setup_info['calendar']['hooks'][] = 'home_month';
-	$setup_info['calendar']['hooks'][] = 'home_week';
-	$setup_info['calendar']['hooks'][] = 'home_year';
-	$setup_info['calendar']['hooks'][] = 'manual';
-	$setup_info['calendar']['hooks'][] = 'preferences';
+	$setup_info['calendar']['hooks'] = array
+	(
+		'add_def_prefs',
+		'admin',
+		'deleteaccount',
+		'email',
+		'home',
+		'home_day',
+		'home_month',
+		'home_week',
+		'home_year',
+		'manual',
+		'preferences',
+		'about'
+	);
 
 	/* Dependencies for this app to work */
 	$setup_info['calendar']['depends'][] = array(