diff --git a/drupal/sites/all/modules/contrib/date/date.devel_generate.inc b/drupal/sites/all/modules/contrib/date/date.devel_generate.inc
index 47de084..1ddc4eb 100644
--- a/drupal/sites/all/modules/contrib/date/date.devel_generate.inc
+++ b/drupal/sites/all/modules/contrib/date/date.devel_generate.inc
@@ -15,8 +15,15 @@ function date_devel_generate($entity, $field, $instance, $bundle) {
   $entity_field = array();
   if (isset($instance['widget']['settings']['year_range'])) {
     $split = explode(':', $instance['widget']['settings']['year_range']);
-    $back = str_replace('-', '', $split[0]);
-    $forward = str_replace('+', '', $split[1]);
+
+    // Determine how much to go back and forward depending on whether a relative
+    // number of years (with - or + sign) or an absolute year is given.
+    $back = strpos($split[0], '-') === 0
+      ? str_replace('-', '', $split[0])
+      : date_format(date_now(), 'Y') - $split[0];
+    $forward = strpos($split[1], '+') === 0
+      ? str_replace('+', '', $split[1])
+      : $split[1] - date_format(date_now(), 'Y');
   }
   else {
     $back = 2;