mysql 定时任务求助

CREATE EVENT e_hourly
ON SCHEDULE
EVERY 1 HOUR STARTS ‘ 2007-02-10 23:59:00 ‘ ENDS ‘ 2008-02-10 23:59:00 ‘
DO
DELETE FROM messages limit 10;

可以帮我写一下 每周三的 00:00 新增一条数据 怎么写时间部分

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CREATE EVENT e_hourly ON SCHEDULE EVERY 4 WEEK STARTS '2015-09-07 02:00:00' ON COMPLETION PRESERVE DISABLE ON SLAVE DO BEGIN
INSERT INTO xxx(A,B,C) values('1','2','3');
END