Am I on the right way?
CREATE TABLE `events` (
`event_id` int(11) UNSIGNED NOT NULL AUTO_INCREMENT,
`user_id` int(10) UNSIGNED NOT NULL DEFAULT '0',
`user_id_fk_contacts` int(10) unsigned NOT NULL,
`start` datetime NOT NULL DEFAULT '1000-01-01 00:00:00',
`end` datetime NOT NULL DEFAULT '1000-01-01 00:00:00',
`title` text NOT NULL,
PRIMARY KEY(`event_id`),
KEY(`user_id_fk_contacts`),
CONSTRAINT FOREIGN KEY (`user_id`)
REFERENCES `users`(`user_id`)
)