diff --git a/date_api/date_api.module b/date_api/date_api.module
index 49b49e3c..019f9163 100644
--- a/date_api/date_api.module
+++ b/date_api/date_api.module
@@ -2653,7 +2653,7 @@ function date_get_timezone($handling, $timezone = '') {
       $timezone = !empty($timezone) ? $timezone : date_default_timezone();
       break;
 
-    case ('none'):
+    case 'none':
     case 'utc':
       $timezone = 'UTC';
       break;
@@ -2678,15 +2678,15 @@ function date_get_timezone($handling, $timezone = '') {
  */
 function date_get_timezone_db($handling, $timezone = NULL) {
   switch ($handling) {
-    case ('utc'):
-    case ('site'):
-    case ('user'):
-    case ('none'):
+    case 'utc':
+    case 'site':
+    case 'user':
+    case 'none':
       // These handling modes all convert to UTC before storing in the DB.
       $timezone = 'UTC';
       break;
 
-    case ('date'):
+    case 'date':
       if ($timezone == NULL) {
         // This shouldn't happen, since it's meaning is undefined. But we need
         // to fall back to *something* that's a legal timezone.