Index: event.module
===================================================================
--- event.module	(revision 209)
+++ event.module	(working copy)
@@ -356,6 +356,11 @@
     '#maxlength' =>  5,
     '#size' => 3,
     '#description' => t('The default number of days to display in the table view. You can specify a different number of days in the url. More info on the event url format !link', array('!link' => l(t('here'), 'admin/help/event#url-format'))));
+  $form['event_navigation_extended'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Extended calendar navigation'),
+    '#default_value' => variable_get('event_navigation_extended', false),
+    '#description' => t('Allow event calendar navigation for one year before and after actual event range'));
 
   if (module_exists('taxonomy')) {
     $form['event_taxonomy_control'] = array(
@@ -1751,7 +1756,9 @@
     event_set_range();
     $range = variable_get('event_range_'. $dir, $date);
   }
-
+  if (variable_get('event_navigation_extended', false)) {
+    $range['year'] = (string)((int)$range['year'] + (($dir == 'prev') ? -1 : +1));  	
+  }
   // if we are beyond the range of the stored events, dont display navigation
   if (($dir == 'prev' && event_is_later($date, $range)) || ($dir == 'next' && event_is_later($range, $date))) {
     $inc = ($dir == 'prev' ? -1 : 1);