I have added the following simple test event on my mysql database via phpmyadmin:
CREATE DEFINER=`root`@`localhost` EVENT `my_event`
ON SCHEDULE EVERY 1 MINUTE STARTS '2013-05-27 00:00:00'
ON COMPLETION NOT PRESERVE ENABLE DO
UPDATE `test` SET `name`="z";
Events are run by the scheduler, which is not started by default.
SHOW PROCESSLIST is possible to check whether it is started. If not, run the command
SET GLOBAL event_scheduler = ON;
to run it.