From 086b153ae274e528e709d179795d0bafd5f382bd Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <thomas@roundcube.net>
Date: Wed, 31 Oct 2012 11:50:33 +0100
Subject: Improve client-side timezone detection using jsTimezoneDetect by Jon
 Nylander (#1488725); removed obsolete dstactive detection

---
 program/include/rcube_config.php | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'program/include/rcube_config.php')

diff --git a/program/include/rcube_config.php b/program/include/rcube_config.php
index b9fd95578..1f165ba4a 100644
--- a/program/include/rcube_config.php
+++ b/program/include/rcube_config.php
@@ -412,7 +412,20 @@ class rcube_config
      */
     private function client_timezone()
     {
-        return isset($_SESSION['timezone']) && ($ctz = timezone_name_from_abbr("", $_SESSION['timezone'] * 3600, 0)) ? $ctz : date_default_timezone_get();
+        if (isset($_SESSION['timezone']) && is_numeric($_SESSION['timezone'])
+              && ($ctz = timezone_name_from_abbr("", $_SESSION['timezone'] * 3600, 0))) {
+            return $ctz;
+        }
+        else if (!empty($_SESSION['timezone'])) {
+            try {
+                $tz = timezone_open($_SESSION['timezone']);
+                return $tz->getName();
+            }
+            catch (Exception $e) { /* gracefully ignore */ }
+        }
+
+        // fallback to server's timezone
+        return date_default_timezone_get();
     }
 
 }
-- 
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