diff --git a/sources/lib/utils/timezoneutil.php b/sources/lib/utils/timezoneutil.php
index 0926ed8..1aec962 100644
--- a/sources/lib/utils/timezoneutil.php
+++ b/sources/lib/utils/timezoneutil.php
@@ -1112,6 +1112,11 @@ class TimezoneUtil {
      * @return array
      */
     static public function GetFullTZFromTZName($tzname) {
+        if (!array_key_exists($tzname, self::$tzonesoffsets)) {
+            ZLog::Write(LOGLEVEL_DEBUG, sprintf("TimezoneUtil::GetFullTZFromTZName('%s'): Is a PHP TimeZone, converting", $tzname));
+            $tzname = self::guessTZNameFromPHPName($tzname);
+        }
+
         $offset = self::$tzonesoffsets[$tzname];
 
         $tz = array(
diff --git a/sources/testing/testing-imap_meeting.php b/sources/testing/testing-imap_meeting.php
index 22006ad..03ce136 100644
--- a/sources/testing/testing-imap_meeting.php
+++ b/sources/testing/testing-imap_meeting.php
@@ -5,6 +5,8 @@ require_once 'vendor/autoload.php';
 define('LOGLEVEL', LOGLEVEL_DEBUG);
 define('LOGUSERLEVEL', LOGLEVEL_DEVICEID);
 
+date_default_timezone_set('Europe/Madrid');
+
 $body = file_get_contents('testing/samples/meeting_request.txt');
 
 $ical = new iCalComponent();