I think you can retrieve the server and client time_zone settings:
SELECT @@global.time_zone, @@session.time_zone;
You can also change the client timezone, or the timezone for the entire MySQL instance.
If you have server time_zone set at MySQL instance startup, you can modify the /etc/my.cnf file (or wherever your mysql instance initialization parameters are read from), under the [mysqld] section:
[mysqld]
default-time-zone='+00:00'
-- or --
add the --default_time_zone='+00:00' option to mysqld_safe
WIth Each client session can change the timezone setting for their own session:
mysql> SET GLOBAL time_zone = 'Asia/Tokyo';
(Or whatever time zone GMT+1 is.: http://www.php.net/manual/en/timezones.php)
This is the command to set the MySQL timezone for an individual client, assuming that your clients are spread accross multiple time zones.