Since the version 1.7 I get the following warning - in version 1.6 everything is ok ...
Warning: strtotime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead in /var/www/vhosts/modellbahn-anlage.de/daten_subdomains/support/include/class.staff.php on line 61