On one server, when I run:
mysql> select now(); +---------------------+ | now() | +---------------------+ | 2009-05-30 16:54:29 | +---------
Edit the MySQL config file
sudo nano /etc/mysql/my.cnf
Scroll and add these to the bottom. Change to relevant time zone
[mysqld] default-time-zone = "+00:00"
Restart the server
sudo service mysql restart