Set an anniversary date for staff

It would be great to set an anniversary date, or essentially a pay review date, so that I can know X employee has been here 3 months, need a pay review, or to determine whether or not they are off probation. Or they have been here 12 months let's have cake. :) But seriously, it is an offence to leave someone on a level one award longer than three months without putting in writing as to why. A reminder is necessary please.